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1

Enhanced Combustion Low NOx Pulverized Coal Burner  

SciTech Connect (OSTI)

For more than two decades, Alstom Power Inc. (Alstom) has developed a range of low cost, infurnace technologies for NOx emissions control for the domestic U.S. pulverized coal fired boiler market. This includes Alstom's internally developed TFS 2000{trademark} firing system, and various enhancements to it developed in concert with the U.S. Department of Energy. As of the date of this report, more than 270 units representing approximately 80,000 MWe of domestic coal fired capacity have been retrofit with Alstom low NOx technology. Best of class emissions range from 0.18 lb/MMBtu for bituminous coal to 0.10 lb/MMBtu for subbituminous coal, with typical levels at 0.24 lb/MMBtu and 0.13 lb/MMBtu, respectively. Despite these gains, NOx emissions limits in the U.S. continue to ratchet down for new and existing boiler equipment. On March 10, 2005, the Environmental Protection Agency (EPA) announced the Clean Air Interstate Rule (CAIR). CAIR requires 25 Eastern states to reduce NOx emissions from the power generation sector by 1.7 million tons in 2009 and 2.0 million tons by 2015. Low cost solutions to meet such regulations, and in particular those that can avoid the need for a costly selective catalytic reduction system (SCR), provide a strong incentive to continue to improve low NOx firing system technology to meet current and anticipated NOx control regulations. The overall objective of the work is to develop an enhanced combustion, low NOx pulverized coal burner, which, when integrated with Alstom's state-of-the-art, globally air staged low NOx firing systems will provide a means to achieve: Less than 0.15 lb/MMBtu NOx emissions when firing a high volatile Eastern or Western bituminous coal, Less than 0.10 lb/MMBtu NOx emissions when firing a subbituminous coal, NOx reduction costs at least 25% lower than the costs of an SCR, Validation of the NOx control technology developed through large (15 MWt) pilot scale demonstration, and Documentation required for economic evaluation and commercial application. During the project performance period, Alstom performed computational fluid dynamics (CFD) modeling and large pilot scale combustion testing in its Industrial Scale Burner Facility (ISBF) at its U.S. Power Plant Laboratories facility in Windsor, Connecticut in support of these objectives. The NOx reduction approach was to optimize near-field combustion to ensure that minimum NOx emissions are achieved with minimal impact on unburned carbon in ash, slagging and fouling, corrosion, and flame stability/turn-down. Several iterations of CFD and combustion testing on a Midwest coal led to an optimized design, which was extensively combustion tested on a range of coals. The data from these tests were then used to validate system costs and benefits versus SCR. Three coals were evaluated during the bench-scale and large pilot-scale testing tasks. The three coals ranged from a very reactive subbituminous coal to a moderately reactive Western bituminous coal to a much less reactive Midwest bituminous coal. Bench-scale testing was comprised of standard ASTM properties evaluation, plus more detailed characterization of fuel properties through drop tube furnace testing and thermogravimetric analysis. Bench-scale characterization of the three test coals showed that both NOx emissions and combustion performance are a strong function of coal properties. The more reactive coals evolved more of their fuel bound nitrogen in the substoichiometric main burner zone than less reactive coal, resulting in the potential for lower NOx emissions. From a combustion point of view, the more reactive coals also showed lower carbon in ash and CO values than the less reactive coal at any given main burner zone stoichiometry. According to bench-scale results, the subbituminous coal was found to be the most amenable to both low NOx, and acceptably low combustibles in the flue gas, in an air staged low NOx system. The Midwest bituminous coal, by contrast, was predicted to be the most challenging of the three coals, with the Western bituminous coal predicted to beh

David Towle; Richard Donais; Todd Hellewell; Robert Lewis; Robert Schrecengost

2007-06-30T23:59:59.000Z

2

NETL: Emissions Characterization - Adv. Low-NOx Burner Emissions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Advanced Low-NOx Burner Emissions Characterization Advanced Low-NOx Burner Emissions Characterization The goal of this work is to develop a comprehensive, high-quality database characterizing PM2.5 emissions from utility plants firing high sulfur coals. The specific objectives are to: 1) develop and test an ultra low-NOx pulverized coal burner for plug-in retrofit applications without boiler wall tube modifications, 2) assess the impact of low-NOx PC burner operation on NOx and PM2.5 emissions, and 3) provide high-quality data to ensure that future PM2.5 regulations are based on good scientific information. The work will be performed in the Clean Environment Development Facility (CEDF), a 100 million Btu/hr near-full-scale facility located at the Alliance Research Center. Related Papers and Publications:

3

NETL: PPII - Integration of Low-NOx Burners with an Optimization Plan for  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Integration of Low-NOx Burners with an Optimization Plan for Boiler Combustion Integration of Low-NOx Burners with an Optimization Plan for Boiler Combustion - Project Brief [PDF-72KB] Sunflower Electric Power Corp., Garden City, Finney County, KS PROJECT FACT SHEET Achieving New Source Performance Standards (NSPS) Through Integration of Low-NOx Burners with an Optimization Plan for Boiler Combustion [PDF-260KB] (Oct 2008) PROGRAM PUBLICATIONS Final Report Achieving NSPS Emission Standards Through Integration of Low NOx Burners with an Optimization Plan for Boiler Combustion [PDF-3.4MB] (June 2006) CCT Reports: Project Performance Summaries, Post-Project Assessments, & Topical Reports Achieving New Source Performance Standards (NSPS) Emission Standards through Integration of Low-NOx Burners with an Optimization Plan for Boiler Combustion: A DOE Assessment [PDF-1.4MB] (Nov 2006)

4

Low NOx burner retrofits and enhancements for a 518 MW oil and gas fired boiler  

SciTech Connect (OSTI)

Low NOx oil/gas burners originally supplied to Jacksonville Electric Authority, Northside No. 3 .500 MW unit, were based on a duplex air register design with lobed spray oil atomizers providing additional fuel staging. Although the burners could meet the targeted NOx levels of 0.3 and 0.2 lbs/10{sup 6} BTU on oil and gas respectively. There was insufficient margin on these NOx levels to enable continuous low NOx operation to be achieved. Further burner development was undertaken based on improved aerodynamic control within the burner design to give an approximate 25% improvement in NOx emission reduction thus providing an adequate operating margin. This `RoBTAS` (Round Burner with Tilted Air Supply) burner design based on techniques developed successfully for front wall coal firing applications achieved the required NOx reductions in full scale firing demonstrations on both heavy fuel oil and natural gas firing. The paper describes the development work and the subsequent application of the `RoBTAS` burners to the Northside No. 3 boiler. The burner will also be test fired on Orimulsion fuel and thus the comparison between heavy fuel oil firing and Orimulsion firing under ultra low NOx conditions will be made.

King, J.J. [Jacksonville Electric Authority, FL (United States); Allen, J.W.; Beal, P.R. [International Combustion Ltd., Derby (United Kingdom). Rolls-Royce Industrial Power Group

1995-12-31T23:59:59.000Z

5

EA-1472: Commercial Demonstration fo the Low Nox Burner/Separated Over-Fire  

Broader source: Energy.gov (indexed) [DOE]

472: Commercial Demonstration fo the Low Nox Burner/Separated 472: Commercial Demonstration fo the Low Nox Burner/Separated Over-Fire Air (LNB/SOFA) Integration System Emission Reduction Technology, Holcolm Station, Sunflower Electric Power Corporation Finnety County, Kansas EA-1472: Commercial Demonstration fo the Low Nox Burner/Separated Over-Fire Air (LNB/SOFA) Integration System Emission Reduction Technology, Holcolm Station, Sunflower Electric Power Corporation Finnety County, Kansas SUMMARY The DOE has prepared an Environmental Assessment (EA), to analyze the potential impacts of the commercial application of the Low-NOx Burner/Separated Over-Fire Air (LNB/SOFA) integration system to achieve nitrogen oxide (NOx) emissions reduction at Sunflower's Holcomb Unit No. 1 (Holcomb Station), located near Garden City, in Finney County, Kansas.

6

An experimental study on combustion processes and nox emission characteristics of the air-staged burner  

Science Journals Connector (OSTI)

The combustion processes and emission characteristics in air-staged burner...5H5N) is used to investigate the fuel NOX emission characteristics. Experiments are carried out for a wide range of operating condition...

Kook-Young Ahn; Han-Seok Kim; Eun-Seong Cho; Jin-Hyuk Ahn…

1999-06-01T23:59:59.000Z

7

Latest developments and application of DB Riley's low NOx CCV{reg{underscore}sign} burner technology  

SciTech Connect (OSTI)

Recent developments in DB Riley (DBR) low NOx burner technology and the application of this technology in coal fired utility boilers are discussed. Since the promulgation of the Clean Air Act Amendment in 1990, DBR has sold nearly 1,500 Controlled Combustion Venturi (CCV{reg{underscore}sign}) burners on pulverized coal fired utility boilers reducing NOx emissions 50--70% from uncontrolled levels. This technology has been retrofitted on boiler designs ranging in size and type from 50 MW front wall fired boilers to 1,300 MW opposed fired cell type boilers. In DBR's latest version of the CCV{reg{underscore}sign} burner, a second controlled flow air zone was added to enhance NOx control capability. Other developments included improved burner air flow measurement accuracy and several mechanical design upgrades such as new coal spreader designs for 3 year wear life. Test results of the CCV{reg{underscore}sign} dual air zone burner in DBR's 100 million Btu/hr (29 MW) coal burner test facility are presented. In the test program, coals from four utility boiler sites were fired to provide a range of coal properties. A baseline high volatile bituminous coal was also fired to provide a comparison with 1992 test data for the CCV{reg{underscore}sign} single register burner. The tests results showed that the second air zone enhanced NOx reduction capability by an additional 20% over the single register design. Computational fluid dynamic (DFD) modeling results of the CCV{reg{underscore}sign} dual air zone burner are also presented showing near field mixing patterns conducive to low NOx firing. DBR was recently awarded Phase IV of the Low Emission Boiler System (LEBS) program by the US Department of Energy to build a proof of concept facility representing the next major advancement in pulverized coal burning technology. A key part of winning that award were test results of the CCV{reg{underscore}sign} dual air zone burner with advanced air staging and coal reburning in a 100 million Btu/hr (20 MW) U-fired slagging combustor test facility. These results showed NOx emissions of less than 0.2 lb/million Btu (0.086 g/MJ) while converting the coal ash into an inert, non-leachable solid. This results is an 80% reduction in NOx emissions from currently operating U-fired slagging boilers.

Penterson, C.; Ake, T.

1998-07-01T23:59:59.000Z

8

Utilization of computational fluid dynamics technique in low NOx burner/furnace retrofits  

SciTech Connect (OSTI)

A computational fluid dynamics (CFD) technique has been utilized to provide design guidance for retrofitting low NOx combustion systems and incorporating associated furnace modifications into existing utility boilers. The CFD program utilized is FW-FIRES (Fossil fuel, Water-walled Furnace Integrated Reaction and Emission Simulation) which simulates furnace combustion, heat transfer and pollutant formation based on fundamental principals of mass, momentum and energy conservations. The program models the gas flow field as a three-dimensional turbulent reacting continuum and the particle flow as a series of discrete particle trajectories through the gas continuum. Chemical reaction, heat transfer, and pollutant formation mechanisms are incorporated in the program. FW-FIRES furnace simulation of low NOx combustion system retrofits has been performed for various furnace configurations including front wall-fired, front and real wall-fired, and tangentially-fired furnaces, to determine the effects of burner/furnace modifications on the NOx emission, furnace exit gas temperature, furnace heat absorption, unburned carbon, and furnace wall corrosion. For front wall-fired, and front and real wall-fired furnaces, the NOx emission requirement is met by the use of Foster Wheeler lox NOx burners and overfire air (OFA) staging. Studies of burner and OFA quantify and spacing are conducted to limit NOx emission and unburned carbon to acceptable levels. A major concern in once-through supercritical units with OFA is furnace wall corrosion which is caused by high furnace wall metal temperature and corrosive hydrogen sulfide (H{sub 2}S) created in a reducing atmosphere from part of coal sulfur. The FW-FIRES code is used to minimize this corrosion potential by selecting the proper location and quantity of boundary air. A simulation of tangentially-fired unit, which has been retrofitted with low NOx burners, is used to study the effect of the burner tilt on the furnace exit gas temperature. This paper details the basis and results of several CFD analyses conducted for potential retrofit programs.

Cho, S.M.; Seltzer, A.H.; Ma, J.; Steitz, T.H.; Grusha, J.; Cole, R.W.

1999-07-01T23:59:59.000Z

9

Advanced furnace air staging and burner modifications for ultra-low NOx firing systems  

SciTech Connect (OSTI)

Overfire air is an effective means to reduce NOx emissions from coal fired furnaces. The current range of overfire air usage on wall-fired boilers in the US is in the range of 10 to 20%. In most cases this is enough to achieve current Title IV NOx reduction requirements. Future applications are likely to go beyond 20% Overfire Air to reduce NOx further for lower investment and operating costs of SCR retrofits. Summer ozone reduction requires NOx emissions of 0.15 lb/MBtu. Currently, industry is exploring the conditions under which this goal is attainable. The paper discussed the approach to achieve ultra-low NOx emissions by using advanced furnace air staging. It describes the unique approach of redesigning the burner to maintain low NOx burner performance when the overfire air system is added or increased in capacity. The impact on furnace corrosion and unburned carbon losses are presented. A case study is used to show the effects of overfire air both on emissions and unburned carbon.

McCarthy, K.; Laux, S.; Grusha, J.

1999-07-01T23:59:59.000Z

10

Low NOx Burner Design and Analysis for Conceptual Design of Oxygen-Based PC Boiler  

SciTech Connect (OSTI)

The objective of the low NOx burner design and analysis task of the Conceptual Design of Oxygen-Based PC Boiler study is to optimize the burner design to ensure stable ignition, to provide safe operation, and to minimize pollutant formation. The burners were designed and analyzed using the Fluent computer program. Four burner designs were developed: (1) with no over-fire gas (OFG) and 65% flue gas recycle, (2) with 20% OFG and 65% flue gas recycle, (3) with no OFG and 56% flue gas recycle and (4) with 20% OFG and 56% flue gas recycle. A 3-D Fluent simulation was made of a single wall-fired burner and horizontal portion of the furnace from the wall to the center. Without primary gas swirl, coal burnout was relatively small, due to the low oxygen content of the primary gas stream. Consequently, the burners were modified to include primary gas swirl to bring the coal particles in contact with the secondary gas. An optimal primary gas swirl was chosen to achieve sufficient burnout.

Andrew Seltzer

2005-05-01T23:59:59.000Z

11

Method for reducing NOx during combustion of coal in a burner  

DOE Patents [OSTI]

An organically complexed nanocatalyst composition is applied to or mixed with coal prior to or upon introducing the coal into a coal burner in order to catalyze the removal of coal nitrogen from the coal and its conversion into nitrogen gas prior to combustion of the coal. This process leads to reduced NOx production during coal combustion. The nanocatalyst compositions include a nanoparticle catalyst that is made using a dispersing agent that can bond with the catalyst atoms. The dispersing agent forms stable, dispersed, nano-sized catalyst particles. The catalyst composition can be formed as a stable suspension to facilitate storage, transportation and application of the catalyst nanoparticles to a coal material. The catalyst composition can be applied before or after pulverizing the coal material or it may be injected directly into the coal burner together with pulverized coal.

Zhou, Bing (Cranbury, NJ); Parasher, Sukesh (Lawrenceville, NJ); Hare, Jeffrey J. (Provo, UT); Harding, N. Stanley (North Salt Lake, UT); Black, Stephanie E. (Sandy, UT); Johnson, Kenneth R. (Highland, UT)

2008-04-15T23:59:59.000Z

12

Latest developments and application of DB Riley`s low NOx CCV{reg_sign} burner technology  

SciTech Connect (OSTI)

Recent developments in DB Riley (DBR) low NO{sub x} burner technology and the application of this technology in coal fired utility boilers are discussed. Since the promulgation of the Clean Air Act Amendment in 1990, DBR has sold nearly 1500 Controlled Combustion Venturi (CCV{reg_sign}) burners on pulverized coal fired utility boilers reducing NOx emissions 50 - 70% from uncontrolled levels. This technology has been retrofitted on boiler designs ranging in size and type from 50 MW front wall fired boilers to 1300 MW opposed fired cell type boilers. In DBR`s latest version of the CCV{reg_sign} burner, a second controlled flow air zone was added to enhance NO{sub x} control capability. Other developments included improved burner air flow measurement accuracy and several mechanical design upgrades such as new coal spreader designs for 3 year wear life. Test results of the CCV{reg_sign} dual air zone burner in DBR`s 100 million Btu/hr (29 MW) coal burner test facility are presented. In the test program, coals from four utility boiler sites were fired to provide a range of coal properties. A baseline high volatile bituminous coal was also fired to provide a comparison with 1992 test data for the CCV{reg_sign} single register burner. The test results showed that the second air zone enhanced NO{sub x} reduction capability by an additional 20% over the single register design. Computational fluid dynamic (CFD) modeling results of the CCV{reg_sign} dual air zone burner are also presented showing near field mixing patterns conducive to low NO{sub x} firing.

Penterson, C.; Ake, T. [DB Riley, Inc., Worcester, MA (United States)

1998-04-01T23:59:59.000Z

13

Combustion characteristics and NOx emissions of two kinds of swirl burners in a 300-MWe wall-fired pulverized-coal utility boiler  

SciTech Connect (OSTI)

Measurements were performed in a 300-MWe wall-fired pulverized-coal utility boiler. Enhanced ignition-dual register (EI-DR) burners and centrally fuel rich (CFR) swirl coal combustion burners were installed in the bottom row of the furnace during experiments. Local mean concentrations of O{sub 2}, CO, CO{sub 2} and NOx gas species, gas temperatures, and char burnout were determined in the region of the two types of burners. For centrally fuel rich swirl coal combustion burners, local mean CO concentrations, gas temperatures and the temperature gradient are higher and mean concentrations of O{sub 2} and NOx along the jet flow direction in the burner region are lower than for the enhanced ignition-dual register burners. Moreover, the mean O{sub 2} concentration is higher and the gas temperature and mean CO concentration are lower in the side wall region. For centrally fuel rich swirl coal combustion burners in the bottom row, the combustion efficiency of the boiler increases from 96.73% to 97.09%, and NOx emission decreases from 411.5 to 355 ppm at 6% O{sub 2} compared to enhanced ignition-dual register burners and the boiler operates stably at 110 MWe without auxiliary fuel oil.

Li, Z.Q.; Jing, J.P.; Chen, Z.C.; Ren, F.; Xu, B.; Wei, H.D.; Ge, Z.H. [Harbin Institute for Technology, Harbin (China). School for Energy Science & Engineering

2008-07-01T23:59:59.000Z

14

Fuel-NOx Formation during Low-Grade Fuel Combustion in a Swirling-Flow Burner.  

E-Print Network [OSTI]

?? Insufficient knowledge of fireside behavior in the near-burner region during biomass combustion is one of major factors preventing widespread use of this renewable fuel… (more)

Wu, Chunyang

2006-01-01T23:59:59.000Z

15

Fuel-NOx Formation during Low-Grade Fuel Combustion in a Swirling-Flow Burner.  

E-Print Network [OSTI]

??Insufficient knowledge of fireside behavior in the near-burner region during biomass combustion is one of major factors preventing widespread use of this renewable fuel in… (more)

Wu, Chunyang 1975-

2006-01-01T23:59:59.000Z

16

Low NOx modifications on front-fired pulverized coal fuel burners  

SciTech Connect (OSTI)

Burner optimizations and modifications were performed on Public Service of New Hampshire`s Schiller Units 4, 5, and 6. These are Foster-Wheeler 50 MWg pulverized coal and No.6 fuel oil-fired boilers with six burners each. Burner optimizations consisted of fuel flow, primary air, secondary air testing and balancing. Burner modifications consisted of the addition of circumferentially and radially staged flame stabilizers, circumferentially-staged coal spreaders, and modifications to the existing pulverized coal pipe. NO{sub x} emissions on Unit 6 of .41 lb/mmBtu were achieved at optimized burner settings at full load with all burners in service and without the use of overfire air or bias firing. This represented a 50% NO{sub x} reduction from the average pre-modification baseline NO{sub x} emissions of .81 lb/mmBtu prior to the optimizations and burner modification program. NO{sub x} emissions as low as .38 lb/mmBtu were achieved with the use of overfire air. There was essentially no quantifiable change in LOIs (baseline LOIs averaged 40%). Furnace excess O{sub 2} as low as 1.2% was achieved with CO emissions of less than 200 ppm. Total installed costs including the overfire air system were approximately $7/kW.

Owens, B.; Hitchko, M. [Public Service of New Hampshire, Manchester, NH (United States); Broderick, R.G. [RJM Corp., Ridgefield, CT (United States)

1996-01-01T23:59:59.000Z

17

An evolution of nozzle design: The low NOx burner experience at the Baldwin Power Station  

SciTech Connect (OSTI)

Illinois Power Company (IPC) installed low NO{sub x} burners on Baldwin Unit 3 in the Spring of 1994. Although the NO{sub x} reduction performance of these burners has been outstanding, IPC suffered catastrophic nozzle failure in the first 8 weeks of operation. The nozzles were then modified and later, replaced. Within 1 week of operation, 2 of the new nozzles also failed. This paper traces the development of the original nozzle, the influences-of other nozzle failures on its design, the determination of the cause of the original and subsequent failures, and the current state of the nozzles.

Forney, D.W. [Illinois Power Co., Decatur, IL (United States); Murray, D.G. [Rolls Royce Industrial Power, Inc., Atlanta, GA (United States); Beal, P.R. [Rolls-Royce Industrial Power, Inc., Derby (United Kingdom)

1996-01-01T23:59:59.000Z

18

Evaluation of Gas Reburning and Low-NOx Burners on a Wall-Fired Boiler  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 Evaluation of Gas Reburning and Low-NO x Burners on a Wall-Fired Boiler A DOE Assessment February 2001 U.S. Department of Energy National Energy Technology Laboratory P.O. Box 880, 3610 Collins Ferry Road Morgantown, WV 26507-0880 and P.O. Box 10940, 626 Cochrans Mill Road Pittsburgh, PA 15236-0940 website: www.netl.doe.gov Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference

19

Thermophotovoltaics for Combined Heat and Power Using Low NOx Gas Fired Radiant Tube Burners  

Science Journals Connector (OSTI)

Three new developments have now occurred making economical TPV systems possible. The first development is the diffused junction GaSb cell that responds out to 1.8 microns producing over 1 W/cm2 electric given a blackbody IR emitter temperature of 1250 C. This high power density along with a simple diffused junction cell makes an array cost of $0.50 per Watt possible. The second development is new IR emitters and filters that put 75% of the radiant energy in the cell convertible band. The third development is a set of commercially available ceramic radiant tube burners that operate at up to 1250 C. Herein we present near term and longer term spectral control designs leading to a 1.5 kW TPV generator / furnace incorporating these new features. This TPV generator / furnace is designed to replace the residential furnace for combined heat and power for the home.

Lewis Fraas; James Avery; Enrico Malfa; Joachim G. Wuenning; Gary Kovacik; Chris Astle

2003-01-01T23:59:59.000Z

20

DOE/EA-1472: Finding of No Significant Impact for the Commercial Demonstration of the Low NOx Burner/Separated Over-Fire Air Integration System Emission Reduction Technology (03/11/03)  

Broader source: Energy.gov (indexed) [DOE]

IMPACT IMPACT COMMERCIAL DEMONSRATION OF THE LOW NOx BURNER/SEPARATED OVER- FIRE AIR (LNB/SOFA) INTEGRATON SYSTEM EMISSION REDUCTION TECHNOLOGY HOLCOMB STATION SUNFLOWER ELECTRIC POWER CORPORATION FINNEY COUNTY, KANSAS AGENCY: U.S. Department of Energy (DOE) ACTION: Finding of No Significant Impact (FONSI) SUMMARY: The DOE has prepared an Environmental Assessment (EA), to analyze the potential impacts of the commercial application of the Low-NOx Burner/Separated Over-Fire Air (LNB/SOFA) integration system to achieve nitrogen oxide (NOx) emissions reduction at Sunflower's Holcomb Unit No. 1 (Holcomb Station), located near Garden City, in Finney County, Kansas. The Holcomb Station would be modified in three distinct phases to demonstrate the synergistic effect of layering NO,

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Achieving New Source Performance Standards (NSPS) Through Integration of Low-NOx Burners with an Optimization Plan for Boiler Combustion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Improvement Improvement Initiative (PPII) CONTACTS Brad Tomer Director Office of Major Demonstrations National Energy Technology Laboratory 3610 Collins Ferry Road P.O. Box 880 Morgantown, WV 26507-0880 304-285-4692 brad.tomer@netl.doe.gov PARTNER Sunflower Electric Power Corporation Garden City, KS Sunflower's 360 MWe Wall-fired Holcomb Station Achieving new Source PerformAnce StAndArdS (nSPS) through integrAtion of Low-no X BurnerS with An oPtimizAtion PLAn for BoiLer comBuStion (comPLeted) A unique combination of high-tech combustion modifications and sophisticated control systems was planned to be tested on a coal-fired boiler at Sunflower Electric's Holcomb Power Station in Finney County, Kansas, to demonstrate how new technology can reduce air emissions and save costs for ratepayers. However, due to larger than anticipated costs

22

Flexible CHP System with Low NOx, CO and VOC Emissions- Fact Sheet, 2014  

Broader source: Energy.gov [DOE]

Utilizing Supplemental Ultra-Low-NOx Burner Technology to Meet Emissions Standards and Improve System Efficiency

23

NETL: Advanced NOx Emissions Control: Control Technology - NOx Emissions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Emissions from Multi-Burners Emissions from Multi-Burners The University of Utah working with Reaction Engineering International and Brigham Young University is investigating a project that consists of integrated experimental, theoretical and computational modeling efforts. The primary objective is to evaluate NOx formation/destruction processes as they occur in multi-burner arrays, a geometry almost always utilized in utility practice. Most controlled experimental work examining NOx has been conducted on single burners. The range of potential intra-burner interactions are likely to provide added degrees of freedom for reducing NOx. The resultant findings may allow existing utilities to arrange fuel and air distribution to minimize NOx. In new applications, orientation of individual burners within an array may also be altered to reduce NOx. Comprehensive combustion codes will be modified to incorporate the latest submodels of nitrogen release and heterogeneous chemistry. Comparison of pilot scale experiments and simulations will be utilized to validate/develop theory.

24

Achieving New Source Performance Standards (NSPS) Emission Standards Through Integration of Low-NOx Burners with an Optimization Plan for Boiler Combustion  

SciTech Connect (OSTI)

The objective of this project was to demonstrate the use of an Integrated Combustion Optimization System to achieve NO{sub X} emission levels in the range of 0.15 to 0.22 lb/MMBtu while simultaneously enabling increased power output. The project plan consisted of the integration of low-NO{sub X} burners and advanced overfire air technology with various process measurement and control devices on the Holcomb Station Unit 1 boiler. The plan included the use of sophisticated neural networks or other artificial intelligence technologies and complex software to optimize several operating parameters, including NO{sub X} emissions, boiler efficiency, and CO emissions. The program was set up in three phases. In Phase I, the boiler was equipped with sensors that can be used to monitor furnace conditions and coal flow to permit improvements in boiler operation. In Phase II, the boiler was equipped with burner modifications designed to reduce NO{sub X} emissions and automated coal flow dampers to permit on-line fuel balancing. In Phase III, the boiler was to be equipped with an overfire air system to permit deep reductions in NO{sub X} emissions. Integration of the overfire air system with the improvements made in Phases I and II would permit optimization of boiler performance, output, and emissions. This report summarizes the overall results from Phases I and II of the project. A significant amount of data was collected from the combustion sensors, coal flow monitoring equipment, and other existing boiler instrumentation to monitor performance of the burner modifications and the coal flow balancing equipment.

Wayne Penrod

2006-12-31T23:59:59.000Z

25

Industrial Energy Conservation, Forced Internal Recirculation Burner  

SciTech Connect (OSTI)

The overall objective of this research project is to develop and evaluate an industrial low NOx burner for existing and new gas-fired combustion systems for intermediate temperature (1400 degree to 2000 degree F) industrial heating devices such as watertube boilers and process fluid heaters. A multi-phase effort is being pursued with decision points to determine advisability of continuance. The current contract over Phases II and III of this work. The objectives of each phase are as follows. Phase II - to design, fabricate, and evaluate prototype burners based on the Forced Internal Recirculation (FIR) concept. Phase III - to evaluate the performance of an FIR burner under actual operating conditions in a full-scale field test and establish the performance necessary for subsequent commercialization

Joseph Rabovitser

2003-06-19T23:59:59.000Z

26

Rotary Burner Demonstration  

SciTech Connect (OSTI)

The subject technology, the Calcpos Rotary Burner (CRB), is a burner that is proposed to reduce energy consumption and emission levels in comparison to currently available technology. burners are used throughout industry to produce the heat that is required during the refining process. Refineries seek to minimize the use of energy in refining while still meeting EPA regulations for emissions.

Paul Flanagan

2003-04-30T23:59:59.000Z

27

Cybersecurity Front Burner | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Awareness Program Cybersecurity Front Burner Cybersecurity Front Burner Documents Available for Download November 1, 2014 FRONT BURNER - ISSUE 19 The Cybersecurity Front Burner...

28

NETL: Advanced NOx Emissions Control: Control Technology - Optimized Fuel  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Optimized Fuel Injector Design Optimized Fuel Injector Design This project includes fundamental research and engineering development of low NOx burners and reburning fuel injectors. The team of Reaction Engineering International (REI), the University of Utah, Brown University and DB Riley, Inc., will develop fundamental information on low NOx burners. The work has two phases. In the first phase, the University of Utah will examine two-phase mixing and near-field behavior of coal injectors using a 15-million Btu/hr bench-scale furnace, Brown University will examine char deactivation and effectiveness of reburning, and REI will develop a comprehensive burner model using the data produced by the University of Utah and Brown University. In the second phase, an optimized injector design will be tested at the 100-million Btu/hr Riley Coal Burner Test Facility. It is anticipated that this work will provide improved hardware designs and computer simulation models for reduced NOx emissions and minimized carbon loss.

29

IEP - Advanced NOx Emissions Control: Regulatory Drivers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

IEP - Advanced NOx Emissions Control Regulatory Drivers Regulatory Drivers for Existing Coal-Fired Power Plants Regulatory and legislative requirements have predominantly driven the need to develop NOx control technologies for existing coal-fired power plants. The first driver was the Title IV acid rain program, established through the 1990 Clean Air Act Amendments (CAAA). This program included a two-phase strategy to reduce NOx emissions from coal-fired power plants – Phase I started January 1, 1996 and Phase II started January 1, 2000. The Title IV NOx program was implemented through unit-specific NOx emission rate limits ranging from 0.40 to 0.86 lb/MMBtu depending on the type of boiler/burner configuration and based on application of LNB technology.

30

Pulverized coal burner  

DOE Patents [OSTI]

A burner is described having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO{sub x} burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO{sub x} back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing. 8 figs.

Sivy, J.L.; Rodgers, L.W.; Koslosy, J.V.; LaRue, A.D.; Kaufman, K.C.; Sarv, H.

1998-11-03T23:59:59.000Z

31

Pulverized coal burner  

DOE Patents [OSTI]

A burner having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO.sub.x burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO.sub.x back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing.

Sivy, Jennifer L. (Alliance, OH); Rodgers, Larry W. (Canton, OH); Koslosy, John V. (Akron, OH); LaRue, Albert D. (Uniontown, OH); Kaufman, Keith C. (Canton, OH); Sarv, Hamid (Canton, OH)

1998-01-01T23:59:59.000Z

32

Burner control system  

SciTech Connect (OSTI)

A burner control apparatus for use with a furnace installation that has an operating control to produce a request for burner operation, a flame sensor to produce a signal when flame is present in the monitored combustion chamber, and one or more devices for control of ignition and/or fuel flow. The burner control apparatus comprises lockout apparatus for de-energizing the control apparatus, a control device for actuating the ignition and/or fuel control devices, and a timing circuit that provides four successive and partially overlapping timing intervals of precise relation, including a purge timing interval, a pilot ignition interval, and a main fuel ignition interval. The present invention further includes a burner control system which verifies the proper operation of certain sensors in a burner or furnace including particularly the air flow sensor. Additionally, the present system also prevents an attempt to ignite a burner if a condition is detected which indicates that the air flow sensor has been bypassed or wedged in the actuated position.

Cade, P.J.

1981-01-06T23:59:59.000Z

33

Low NOx combustion system for heavy oil  

SciTech Connect (OSTI)

As a result of the increasing demand for white oil as one of countermeasures for pollution control and as a fuel for motor vehicle, coupled with the increasing import of heavy crude oil, heavy oils such as asphalt and distillation residue have become surplus in Japan. It is difficult by the conventional low NOx technology to control the NOx emission from the industrial small and medium capacity boilers, which use heavy oil as their fuels. The authors have been developing and improving NOx control technologies for boilers such as low NOx burners, two-stage combustion methods and so on. They have developed a new combustion system for heavy oil, which generates less NOx and soot than conventional systems, by applying the knowledge, obtained in the course of their development of Coal Partial Combustor (CPC). The conventional low NOx combustion method for oil firing boilers has been developed based on decreasing the flame temperature and delaying the combustion reaction. In the system, however, the heavy oil shall be combusted in the intense reducing atmosphere at the high flame temperature between 1,500 C and 1,600 C, and then the combustions gas shall be cooled and oxidized by two-stage combustion air. With this system, NOx emission can be suppressed below 100ppm (converted as O{sub 2}=4%).

Kurata, Chikatoshi; Sasaki, Hideki

1999-07-01T23:59:59.000Z

34

NETL: Advanced NOx Emissions Control: Control Technology - Methane de-NOx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

METHANE de-NOx® METHANE de-NOx® The Gas Technology Institute (GTI) is teaming with the All-Russian Thermal Engineering Institute and DB Riley to develop a pulverized-coal (PC)-combustion system that is an extension of IGT's METHANE de-NOx® technology. The technology is composed of a novel PC burner design using natural gas fired coal preheating developed and demonstrated in Russia, LNBs with internal combustion staging, and additional natural gas injection with overfire air. The coal is preheated at elevated temperatures (up to 1500oF) in oxygen deficient conditions prior to combustion. Coal preheat releases fuel-bound nitrogen together with volatiles present in the coal. These conditions promote the conversion of fuel-bound nitrogen to molecular nitrogen rather than to NOx.

35

NOx Adsorber (Lean NOx Trap) Fundamentals (Agreement #10049 ...  

Broader source: Energy.gov (indexed) [DOE]

NOx Adsorber (Lean NOx Trap) Fundamentals (Agreement 10049 - PNNL Project 47120) NOx Adsorber (Lean NOx Trap) Fundamentals (Agreement 10049 - PNNL Project 47120) Presentation...

36

FRONT BURNER - ISSUE 19 | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

FRONT BURNER - ISSUE 19 FRONT BURNER - ISSUE 19 The Cybersecurity Front Burner Issue No. 19 is the campaign newsletter for the 2014 DOE NCSAM event. The newsletter addresses the...

37

Front Burner - Issue 18 | Department of Energy  

Energy Savers [EERE]

Front Burner - Issue 18 Front Burner - Issue 18 The Cybersecurity Front Burner Issue No. 18 addresses keeping kids safe on the Internet, cyber crime, and DOE Cyber awareness and...

38

Heat transfer and combustion characteristics of a burner with a rotary regenerative heat exchanger  

SciTech Connect (OSTI)

The authors have developed a Rotary Regenerative Combustion (RRX) System, which is coupled with a compact high efficiency regenerative air heat exchanger and a combustion burner. This system contributes to saving energy of fuel firing industrial furnaces and decreases NO{sub x} emission. This technology can be considered as a solution of greenhouse problem. This paper, discusses a compact high efficiency regenerative air heat exchanger in comparison with the existing types of regenerative burners and reverse firing with high momentum fuel jet (with motive fluid) in the furnace. This burner is compact in size, with high fuel efficiency, low NOx emission, easy to operate, and reliable, based on the results of field tests and commercial operations. The authors can say that the RRX system is a regenerative burner of the second generation.

Hirose, Yasuo; Kaji, Hitoshi; Arai, Norio

1998-07-01T23:59:59.000Z

39

NETL: News Release - Commercial Sales of Low-Polluting Clean Coal Burner  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

March 14, 2001 March 14, 2001 Commercial Sales of Low-Polluting Clean Coal Burner Top $1 Billion Abraham Says Commercial Success Shows Benefits of Clean Coal Investment WASHINGTON, DC - An advanced, low-polluting coal combustor is rapidly becoming one of the government's fastest growing clean coal technology success stories. The U.S. Department of Energy today announced that sales of the "low-NOx concentric firing system" (LNCFS?), first pioneered in 1992-92 as part of the federal Clean Coal Technology Program, now top $1 billion. Results show the system is reducing nitrogen oxides, NOx, by nearly 40 percent in older coal burning plants. NOx is one of the air pollutants that contributes to smog, ground-level ozone, and acid rain. According to data compiled by the Energy Department's National Energy Technology Laboratory, 56,000 megawatts of electricity are now being generated in the United States by power plants equipped with the high-tech burner.

40

Evaluation of Gas Reburning and Low N0x Burners on a Wall Fired Boiler  

SciTech Connect (OSTI)

Under the U.S. Department of Energy's Clean Coal Technology Program (Round 3), a project was completed to demonstrate control of boiler NOX emissions and to a lesser degree, due to coal replacement, SO2 emissions. The project involved combining Gas Reburning with Low NOX Burners (GR-LNB) on a coal-fired electric utility boiler to determine if high levels of NO, reduction (70VO) could be achieved. Sponsors of the project included the U.S. Depatiment of Energy, the Gas Research Institute, Public Service Company of Colorado, Colorado Interstate Gas, Electric Power Research Institute, and the Energy and Environmental Research Corporation. The GR-LNB demonstration was petformed on Public Service Company of Colorado's (PSCO) Cherokee Unit #3, located in Denver, Colorado. This unit is a 172 MW~ wall-fired boiler that uses Colorado bituminous, low-sulfur coal. It had a baseline NO, emission level of 0.73 lb/1 OG Btu using conventional burners. Low NOX burners are designed to yield lower NOX emissions than conventional burners. However, the NOX control achieved with this technique is limited to 30-50Y0. Also, with LNBs, CO emissions can increase to above acceptable standards. Gas Reburning (GR) is designed to reduce NO, in the flue gas by staged fuel combustion. This technology involves the introduction of' natural gas into the hot furnace flue gas stream. When combined, GR and LNBs minimize NOX emissions and maintain acceptable levels of CO emissions. A comprehensive test program was completed, operating over a wide range of boiler conditions. Over 4,000 hours of operation were achieved, providing substantial data. Measurements were taken to quantify reductions in NOX emissions, the impact on boiler equipment and operability and factors influencing costs. The GR-LNB technology achieved good NO, emission reductions and the goals of the project were achieved. Although the performance of the low NOX burners (supplied by others) was less than expected, a NOX reduction of 65% was achieved at an average gas heat input of 18%. The performance goal of 70/40 reduction was met on many test runs, but at a higher reburn gas heat input. S02 emissions, based on coal replacement, were reduced by 18%.

None

1998-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Front Burner - Issue 13 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

3 Front Burner - Issue 13 The Cybersecurity Front Burner Issue No. 13 contained a message from the Associate Chief Information Officer (ACIO) for Cybersecurity informing readers...

42

Front Burner - Issue 14 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

4 Front Burner - Issue 14 The Cybersecurity Front Burner Issue No. 14 addresses the 2013 National Cybersecurity Awareness Month (NCSAM) Campaign and Phishing Scams. Cybersecurity...

43

Oil burner nozzle  

DOE Patents [OSTI]

An oil burner nozzle for use with liquid fuels and solid-containing liquid fuels. The nozzle comprises a fuel-carrying pipe, a barrel concentrically disposed about the pipe, and an outer sleeve retaining member for the barrel. An atomizing vapor passes along an axial passageway in the barrel, through a bore in the barrel and then along the outer surface of the front portion of the barrel. The atomizing vapor is directed by the outer sleeve across the path of the fuel as it emerges from the barrel. The fuel is atomized and may then be ignited.

Wright, Donald G. (Rockville Center, NY)

1982-01-01T23:59:59.000Z

44

NETL: Emissions Characterization - Adv. Low-NOx Burner Emissions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Characterization of Fine Particulate Emissions using Subcritical Water Characterization of Fine Particulate Emissions using Subcritical Water As part of a Cooperative Agreement with DOE-NETL, the University of North Dakota Energy and Environmental Research Center (EERC) is developing advanced sampling and analysis methodologies for particulate matter that can be used for source apportionment and to assist in health studies. These techniques will be used to determine sources of fine particulate matter in rural states such as North Dakota. One of the primary activities of this effort is the development of a procedure using subcritical water to fractionate organics in air particulates, and test the toxicity of the fractionated organics using various tests. In contrast to inorganic aerosols, which are often well characterized, only ca. 15%–50% of the organic carbonaceous (OC) particulate mass has been characterized. The characterized compounds are almost exclusively nonpolar. The limited knowledge on OC fractions is due to the use of organic solvents which are able to extract only nonpolar or slightly polar organics. Subcritical water has not previously been used to fractionate OC from air particulates, but should have the ability to extract a broad range of polar to low-polarity OC, as well as to provide extracts in a solvent (water) which is directly useful for biological tests. Earlier studies have shown that compounds of different polarities, such as phenols, PAHs, and alkanes, can be sequentially extracted from a petroleum waste sludge by increases in subcritical water temperature.

45

METHANE de-NOX FOR UTILITY PC BOILERS  

SciTech Connect (OSTI)

The project seeks to develop and validate a new pulverized coal combustion system to reduce utility PC boiler NOx emissions to 0.15 lb per million Btu or less without post-combustion flue gas cleaning. Work during previous reporting periods completed the design, installation, shakedown and initial PRB coal testing of a 3-million Btu/h pilot system at BBP's Pilot-Scale Combustion Facility (PSCF) in Worcester, MA. Based on these results, modifications to the gas-fired preheat combustor and PC burner were defined, along with a modified testing plan and schedule. A revised subcontract was executed with BBP to reflect changes in the pilot testing program. Modeling activities were continued to develop and verify revised design approaches for both the Preheat gas combustor and PC burner. Reactivation of the pilot test system was then begun with BBP personnel. During the previous reporting period, reactivation of the pilot test system was completed with the modified Preheat gas combustor. Following shakedown of the modified gas combustor alone, a series of successful tests of the new combustor with PRB coal using the original PC burner were completed. NOx at the furnace exit was reduced significantly with the modified gas combustor, to as low as 150 ppm with only 36 ppm CO (both corrected to 3% O2). Concurrent with testing, GTI and BBP collaborated on development of two modified designs for the PC burner optimized to fire preheated char and pyrolysis products from the Preheat gas combustor. During the current reporting period, one of the two modified PC burner designs was fabricated and installed in the pilot test facility. Testing of the modified pilot system (modified gas combustor and modified PC burner) during the quarter included 38 tests with PRB coal. NOx reduction was significantly improved to levels as low as 60-100 ppmv with CO in the range of 35-112 ppmv without any furnace air staging.

Joseph Rabovitser; Bruce Bryan; Serguei Nester; Stan Wohadlo

2002-01-31T23:59:59.000Z

46

NETL: Advanced NOx Emissions Control: Control Technology - NOx Combustion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Control Options and Integration Control Options and Integration Reaction Engineering International (REI) is optimizing the performance of, and reduce the technical risks associated with the combined application of low-NOx firing systems (LNFS) and post combustion controls through modeling, bench-scale testing, and field verification. Teaming with REI are the University of Utah and Brown University. During this two-year effort, REI will assess real-time monitoring equipment to evaluate waterwall wastage, soot formation, and burner stoichiometry, demonstrate analysis techniques to improve LNFS in combination with reburning/SNCR, assess selective catalytic reduction catalyst life, and develop UBC/fly ash separation processes. The REI program will be applicable to coal-fired boilers currently in use in the United States, including corner-, wall-, turbo-, and cyclone-fired units. However, the primary target of the research will be cyclone boilers, which are high NOx producing units and represent about 20% of the U.S. generating capacity. The results will also be applicable to all U.S. coals. The research will be divided into four key components:

47

Burner balancing Salem Harbor Station  

SciTech Connect (OSTI)

The traditional method of burner balancing is first to determine the fuel distribution, then to measure the economizer outlet excess oxygen distribution and to adjust the burners accordingly. Fuel distribution is typically measured by clean and dirty air probing. Coal pipe flow can then be adjusted, if necessary, through the use of coal pipe orificing or by other means. Primary air flow must be adjusted to meet the design criteria of the burner. Once coal pipe flow is balanced to within the desired criteria, secondary air flow to individual burners can be changed by adjusting windbox dampers, burner registers, shrouds or other devices in the secondary air stream. This paper discusses problems encountered in measuring excess O{sub 2} at the economizer outlet. It is important to recognize that O{sub 2} measurements at the economizer outlet, by themselves, can be very misleading. If measurement problems are suspected or encountered, an alternate approach similar to that described should be considered. The alternate method is not only useful for burner balancing but also can be used to help in calibrating the plant excess O{sub 2} instruments and provide an on line means of cross-checking excess air measurements. Balanced burners operate closer to their design stoichiometry, providing better NO{sub x} reduction. For Salem Harbor Station, this means a significant saving in urea consumption.

Sload, A.W. [New England Power Co., Salem, MA (United States); Dube, R.J. [DB Riley, Inc., Worcester, MA (United States). Fuel Equipment Design

1995-12-31T23:59:59.000Z

48

Simulation Modeling of an Enhanced Low-Emission Swirl-Cascade Burner  

SciTech Connect (OSTI)

''Cascade-burners'' is a passive technique to control the stoichiometry of the flame through changing the flow dynamics and rates of mixing in the combustion zone with a set of venturis surrounding the flame. Cascade-burners have shown advantages over other techniques; its reliability, flexibility, safety, and cost makes it more attractive and desirable. On the other hand, the application of ''Swirl-burners'' has shown superiority in producing a stable flame under a variety of operating conditions and fuel types. The basic idea is to impart swirl to the air or fuel stream, or both. This not only helps to stabilize the flame but also enhances mixing in the combustion zone. As a result, nonpremixed (diffusion) swirl burners have been increasingly used in industrial combustion systems such as gas turbines, boilers, and furnaces, due to their advantages of safety and stability. Despite the advantages of cascade and swirl burners, both are passive control techniques, which resulted in a moderate pollutant emissions reduction compared to SCR, SNCR and FGR (active) methods. The present investigation will study the prospects of combining both techniques in what to be named as ''an enhanced swirl-cascade burner''. Natural gas jet diffusion flames in baseline, cascade, swirl, and swirl-cascade burners were numerically modeled using CFDRC package. The thermal, composition, and flow (velocity) fields were simulated. The numerical results showed that swirl and cascade burners have a more efficient fuel/air mixing, a shorter flame, and a lower NOx emission levels, compared to the baseline case. The results also revealed that the optimal configurations of the cascaded and swirling flames have not produced an improved performance when combined together in a ''swirl-cascade burner''. The non-linearity and complexity of the system accounts for such a result, and therefore, all possible combinations, i.e. swirl numbers (SN) versus venturi diameter ratios (D/d), need to be considered.

Ala Qubbaj

2004-09-01T23:59:59.000Z

49

Simulation of Nitrogen Emissions in a Low Swirl Burner J. B. Bell, M. S. Day, X. Gao, M. J. Lijewski  

E-Print Network [OSTI]

Simulation of Nitrogen Emissions in a Low Swirl Burner J. B. Bell, M. S. Day, X. Gao, M. J nitrogen emissions. The simulation shows how the cellular burn- ing structures characteristic of lean premixed hydrogen combustion lead to enhancements in the NOx emissions from these flames. Analysis

Bell, John B.

50

Evaluation of Gas Reburning and Low N0x Burners on a Wall Fired Boiler  

SciTech Connect (OSTI)

Under the U.S. Department of Energy's Clean Coal Technology Program (Round 3), a project was completed to demonstrate control of boiler emissions that comprise acid rain precursors, especially NOX. The project involved operating gas reburning technology combined with low NO, burner technology (GR-LNB) on a coal-fired utility boiler. Low NOX burners are designed to create less NOX than conventional burners. However, the NO, control achieved is in the range of 30-60-40, and typically 50%. At the higher NO, reduction levels, CO emissions tend to be higher than acceptable standards. Gas Reburning (GR) is designed to reduce the level of NO. in the flue gas by staged fuel combustion. When combined, GR and LNBs work in harmony to both minimize NOX emissions and maintain an acceptable level of CO emissions. The demonstration was performed at Public Service Company of Colorado's (PSCO) Cherokee Unit 3, located in Denver, Colorado. This unit is a 172 MW. wall-fired boiler that uses Colorado bituminous, low-sulfur coal and had a pre GR-LNB baseline NOX emission of 0.73 lb/1 Oe Btu. The target for the project was a reduction of 70 percent in NOX emissions. Project sponsors included the U.S. Department of Energy, the Gas Research Institute, Public Service Company of Colorado, Colorado Interstate Gas, Electric Power Research Institute, and the Energy and Environmental Research Corporation (EER). EER conducted a comprehensive test demonstration program over a wide range of boiler conditions. Over 4,000 hours of operation were achieved. Intensive measurements were taken to quantify the reductions in NOX emissions, the impact on boiler equipment and operability, and all factors influencing costs. The results showed that GR-LNB technology achieved excellent emission reductions. Although the performance of the low NOX burners (supplied by others) was somewhat less than expected, a NOX reduction of 65% was achieved at an average gas heat input of 180A. The performance goal of 70% reduction was met on many test runs, but at higher gas heat inputs. The impact on boiler equipment was determined to be very minimal. Toward the end of the testing, the flue gas recirculation (used to enhance gas penetration into the furnace) system was removed and new high pressure gas injectors were installed. Further, the low NOX burners were modified and gave better NO. reduction performance. These modifications resulted in a similar NO, reduction performance (64%) at a reduced level of gas heat input (-13Yo). In addition, the OFA injectors were re-designed to provide for better control of CO emissions. Although not a part of this project, the use of natural gas as the primary fuel with gas reburning was also tested. The gas/gas reburning tests demonstrated a reduction in NOX emissions of 43% (0.30 lb/1 OG Btu reduced to 0.17 lb/1 OG Btu) using 7% gas heat input. Economics are a key issue affecting technology development. Application of GR-LNB requires modifications to existing power plant equipment and as a result, the capital and operating costs depend largely on site-specific factors such as: gas availability at the site, gas to coal delivered price differential, sulfur dioxide removal requirements, windbox pressure, existing burner throat diameters, and reburn zone residence time available. Based on the results of this CCT project, EER expects that most GR-LNB installations will achieve at least 60% NOX control when firing 10-15% gas. The capital cost estimate for installing a GR-LNB system on a 300 MW, unit is approximately $25/kW. plus the cost of a gas pipeline (if required). Operating costs are almost entirely related to the differential cost of the natural gas compared to coal.

None

1998-09-01T23:59:59.000Z

51

Burner ignition system  

DOE Patents [OSTI]

An electronic ignition system for a gas burner is battery operated. The battery voltage is applied through a DC-DC chopper to a step-up transformer to charge a capacitor which provides the ignition spark. The step-up transformer has a significant leakage reactance in order to limit current flow from the battery during initial charging of the capacitor. A tank circuit at the input of the transformer returns magnetizing current resulting from the leakage reactance to the primary in succeeding cycles. An SCR in the output circuit is gated through a voltage divider which senses current flow through a flame. Once the flame is sensed, further sparks are precluded. The same flame sensor enables a thermopile driven main valve actuating circuit. A safety valve in series with the main gas valve responds to a control pressure thermostatically applied through a diaphragm. The valve closes after a predetermined delay determined by a time delay orifice if the pilot gas is not ignited.

Carignan, Forest J. (Bedford, MA)

1986-01-21T23:59:59.000Z

52

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

Conventional wisdom says adding oxygen to a combustion system enhances product throughput, system efficiency, and, unless special care is taken, increases NOx emissions. This increase in NOx emissions is typically due to elevated flame temperatures associated with oxygen use leading to added thermal NOx formation. Innovative low flame temperature oxy-fuel burner designs have been developed and commercialized to minimize both thermal and fuel NOx formation for gas and oil fired industrial furnaces. To be effective these systems require close to 100% oxy-fuel combustion and the cost of oxygen is paid for by fuel savings and other benefits. For applications to coal-fired utility boilers at the current cost of oxygen, however, it is not economically feasible to use 100% oxygen for NOx control. In spite of this conventional wisdom, Praxair and its team members, in partnership with the US Department of Energy National Energy Technology Laboratory, have developed a novel way to use oxygen to reduce NOx emissions without resorting to complete oxy-fuel conversion. In this concept oxygen is added to the combustion process to enhance operation of a low NOx combustion system. Only a small fraction of combustion air is replaced with oxygen in the process. By selectively adding oxygen to a low NOx combustion system it is possible to reduce NOx emissions from nitrogen-containing fuels, including pulverized coal, while improving combustion characteristics such as unburned carbon. A combination of experimental work and modeling was used to define how well oxygen enhanced combustion could reduce NOx emissions. The results of this work suggest that small amounts of oxygen replacement can reduce the NOx emissions as compared to the air-alone system. NOx emissions significantly below 0.15 lbs/MMBtu were measured. Oxygen addition was also shown to reduce carbon in ash. Comparison of the costs of using oxygen for NOx control against competing technologies, such as SCR, show that this concept offers substantial savings over SCR and is an economically attractive alternative to purchasing NOx credits or installing other conventional technologies. In conjunction with the development of oxygen based low NOx technology, Praxair also worked on developing the economically enhancing oxygen transport membrane (OTM) technology which is ideally suited for integration with combustion systems to achieve further significant cost reductions and efficiency improvements. This OTM oxygen production technology is based on ceramic mixed conductor membranes that operate at high temperatures and can be operated in a pressure driven mode to separate oxygen with infinite selectivity and high flux. An OTM material was selected and characterized. OTM elements were successfully fabricated. A single tube OTM reactor was designed and assembled. Testing of dense OTM elements was conducted with promising oxygen flux results of 100% of target flux. However, based on current natural gas prices and stand-alone air separation processes, ceramic membranes do not offer an economic advantage for this application. Under a different DOE-NETL Cooperative Agreement, Praxair is continuing to develop oxygen transport membranes for the Advanced Boiler where the economics appear more attractive.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2004-04-01T23:59:59.000Z

53

Criterion for burner design in thermal weed control  

E-Print Network [OSTI]

A covered infrared burner was designed and constructed so that it could be compared to an open-flame burner. Two covered burners, a high configuration and a low configuration, were constructed. A low configuration covered infrared burner, high...

Gonzalez, Telca Marisa

2001-01-01T23:59:59.000Z

54

METHANE de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

During the current quarter, pilot-scale testing with the modified air nozzle version of the PC burner was completed with PRB coal at the Riley Power Inc. (RPI) test facility. A total of 8 different burner configurations were tested utilizing various burner air nozzle arrangements in place of the burner air channels. It was found that with the arrangements tested, a stable flame could not be maintained at coal feed rates above 100 lb/h. While it is felt that the air nozzle approach can ultimately be used effectively, in the interest of holding to the current project schedule it was decided to proceed with the balance of the project using the air channel design. The pilot-scale PC burner was therefore restored to the air-channel configuration and benchmark testing with PRB coal to confirmed previous operating results. A series of tests was then conducted with PRB and West Virginia caking coal to evaluate modifications to the gas combustor configuration and operation for improved performance with caking coal. Continuous operation was achieved with caking coal up to 50 lb/h vs. the full load target of 150 lb/h. Impingement and deposition of partially devolatilized coal occurred at various points within the combustor when the caking coal feed was increased above 50 lb/h. The 100 MMBtu/h commercial-scale prototype design was continued with coal burner design input from both RPI and VTI. Based on typical burner installation layout considerations, it was decided that the preheat combustor should be oriented horizontally on the axial centerline of the coal burner. Accordingly, the pilot gas combustor was changed to this orientation so that the pilot results with caking coal will be directly applicable to the preferred 100 MMBtu design. Testing with caking coal in the horizontal pilot combustor achieved feed rates up to 126 lb/h, although some deposition and LOI issues remain. Several promising approaches to further improve operation with caking coal were identified. NOx results with caking coal are promising, with NOx as low as 150 ppmv at exit oxygen levels of 4% and higher. The 100 MMBtu/h commercial-scale prototype design is nearing completion. Design of the caking coal version of the unit continues with additional pilot testing in support of this design expected. GTI and RPI are expediting the fabrication of the 100 MMBtu/h PRB unit in order to start testing in early- to mid-December. Inspection and repair of the 100 MMBtu/h Coal Burner Test Facility (CBTF) is nearing completion. As of mid-September, this activity was 95% complete.

Bruce Bryan; Joseph Rabovitser; Serguei Nester; Stan Wohadlo

2003-09-30T23:59:59.000Z

55

SIMULATION MODELING OF AN ENHANCED LOW-EMISSION SWIRL-CASCADE BURNER  

SciTech Connect (OSTI)

Based on the physical and computational models outlined in the previous technical progress reports, Natural gas jet diffusion flames in baseline, cascade, swirl, and swirlcascade burners were numerically modeled. The thermal, composition, and flow (velocity) fields were simulated. The temperature, CO{sub 2} and O{sub 2} concentrations, as well as the axial and radial velocity profiles were computed and analyzed. The numerical results showed that swirl and cascade burners have a more efficient fuel/air mixing, a shorter flame, and a lower NOx emission levels, compared to the baseline case. The results also revealed that the optimal configurations of the cascaded and swirling flames have not produced an improved performance when combined together in a ''swirl-cascade burner''.

Ala Qubbaj

2004-04-01T23:59:59.000Z

56

Front Burner - Issue 16 | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

6 Front Burner - Issue 16 The Cybersecurity Front Burner Issue No. 16 addresses Malware, the Worst Passwords of 2013, and the Flat Stanley and Stop.Think.Connect. Campaign....

57

Combustion and \\{NOx\\} emissions of biomass-derived syngas under various gasification conditions utilizing oxygen-enriched-air and steam  

Science Journals Connector (OSTI)

The purpose of this study is to investigate the \\{NOx\\} emissions from combustion of syngas derived from gasification of three different biomass feedstock (i.e., pine, maple–oak mixture, and seed corn) at different oxygen-enriched-air and steam conditions. Three different oxygen-enriched-air and steam conditions were tested for each feedstock, thus resulting in nine different sets of syngas. The biomass-derived syngas was burned in an industrial burner that was integrated into the gasification system. The gasifier and burner are rated at 800 kW and 879 kW thermal, respectively. For each set of biomass-derived syngas, \\{NOx\\} emissions were measured at different burner operating conditions including various heat rates and equivalence ratios using emission analyzers with chemiluminescence technology. All the combustion test conditions are in the lean mixture ranges in order to avoid the peak temperature limitation of both the burner and combustion chamber. Results show that \\{NOx\\} emissions using syngas obtained from woody feedstock decrease almost linearly as the combustion mixture becomes leaner and the heat rate decreases. When compared to natural gas, syngas from both woody feedstock generates higher \\{NOx\\} emissions even when the heat rates are comparable, indicating that fuel \\{NOx\\} formation is highly important in biomass-derived syngas combustion. In contrast to syngas from woody feedstock, syngas from seed corn results in peak \\{NOx\\} emissions before \\{NOx\\} decreases with leaner conditions. The trend is observed for all fuel flow rates and all oxygen-enriched-air and steam conditions of seed corn-derived syngas. Among the three feedstock, seed corn has the highest nitrogen content which yields the highest ammonia concentration in syngas, which, in turn, results in the highest \\{NOx\\} emissions for all test conditions. Overall, the \\{NOx\\} emissions from seed corn-derived syngas combustion are approximately in the range of 450–900 ppm higher compared to those from wood-derived syngas combustion.

Cuong Van Huynh; Song-Charng Kong

2013-01-01T23:59:59.000Z

58

Uniform-burning matrix burner  

DOE Patents [OSTI]

Computer simulation was used in the development of an inward-burning, radial matrix gas burner and heat pipe heat exchanger. The burner and exchanger can be used to heat a Stirling engine on cloudy days when a solar dish, the normal source of heat, cannot be used. Geometrical requirements of the application forced the use of the inward burning approach, which presents difficulty in achieving a good flow distribution and air/fuel mixing. The present invention solved the problem by providing a plenum with just the right properties, which include good flow distribution and good air/fuel mixing with minimum residence time. CFD simulations were also used to help design the primary heat exchanger needed for this application which includes a plurality of pins emanating from the heat pipe. The system uses multiple inlet ports, an extended distance from the fuel inlet to the burner matrix, flow divider vanes, and a ring-shaped, porous grid to obtain a high-temperature uniform-heat radial burner. Ideal applications include dish/Stirling engines, steam reforming of hydrocarbons, glass working, and any process requiring high temperature heating of the outside surface of a cylindrical surface.

Bohn, Mark S. (Golden, CO); Anselmo, Mark (Arvada, CO)

2001-01-01T23:59:59.000Z

59

Low NOx combustion  

SciTech Connect (OSTI)

Combustion of hydrocarbon liquids and solids is achieved with less formation of NOx by feeding a small amount of oxygen into the fuel stream.

Kobayashi; Hisashi (Putnam Valley, NY), Bool, III; Lawrence E. (Aurora, NY)

2007-06-05T23:59:59.000Z

60

Low NOx combustion  

SciTech Connect (OSTI)

Combustion of hydrocarbon liquids and solids is achieved with less formation of NOx by feeding a small amount of oxygen into the fuel stream.

Kobayashi, Hisashi (Putnam Valley, NY); Bool, III, Lawrence E. (Aurora, NY)

2008-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

NETL: Advanced NOx Emissions Control: Control Technology - SCNR Field  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SNCR Field Demonstration SNCR Field Demonstration American Electric Power (AEP), in conjunction with the U.S. Department of Energy, FuelTech, the Ohio Coal Development Office, and fourteen EPRI member utilities, performed a full-scale demonstration of a urea-based Selective Non-Catalytic Reduction (SNCR) system at Cardinal Unit 1. Cardinal Unit 1 is a 600MWe opposed-wall dry bottom pulverized coal-fired boiler that began service in 1967. This unit burns eastern bituminous high-sulfur coal, (3.72%S). This unit was retrofitted with low NOx burners (LNB's) during its scheduled fall 1998 outage and the SNCR system was installed concurrently. SNCR is a post-combustion NOx control process developed to reduce NOx emissions from fossil-fuel combustion systems. SNCR processes involve the injection of a chemical containing nitrogen into the combustion products, where the temperature is in the range of 1600°F - 2200°F (870°C - 1205°C). In this temperature range, the chemical reacts selectively with NOx in the presence of oxygen, forming primarily nitrogen and water. Although a number of chemicals have been investigated and implemented for SNCR NOx reduction, urea and ammonia have been most widely used for full-scale applications.

62

METHANE de-NOX FOR UTILITY PC BOILERS  

SciTech Connect (OSTI)

The project seeks to develop and validate a new pulverized coal combustion system to reduce utility PC boiler NOx emissions to 0.15 lb/million Btu or less without post-combustion flue gas cleaning. Work during previous reporting periods completed the design, installation, shakedown and initial PRB coal testing of a 3-million Btu/h pilot system at BBP's Pilot-Scale Combustion Facility (PSCF) in Worcester, MA. Based on these results, modifications to the gas-fired preheat combustor and PC burner were defined, along with a modified testing plan and schedule. During the current reporting period, BBP's subcontract was modified to reflect changes in the pilot testing program, and the modifications to the gas-fired preheat combustor were completed. The Computational Fluid Dynamics (CFD) modeling approach was defined for the combined PC burner and 3-million Btu/h pilot system. Modeling of the modified gas-fired preheat combustor was also started.

Joseph Rabovitser; Bruce Bryan; Serguei Nester; Stan Wohadlo

2002-04-29T23:59:59.000Z

63

Low-Emissions Burner Technology using Biomass-Derived Liquid...  

Broader source: Energy.gov (indexed) [DOE]

Emissions Burner Technology using Biomass-Derived Liquid Fuels Low-Emissions Burner Technology using Biomass-Derived Liquid Fuels This factsheet describes a project that developed...

64

Combined Heat and Power (CHP) Integrated with Burners for Packaged...  

Broader source: Energy.gov (indexed) [DOE]

Combined Heat and Power (CHP) Integrated with Burners for Packaged Boilers Combined Heat and Power (CHP) Integrated with Burners for Packaged Boilers Providing Clean, Low-Cost,...

65

SEP Success Story: Biomass Burner Cogenerates Jobs and Electricity...  

Office of Environmental Management (EM)

SEP Success Story: Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste SEP Success Story: Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste...

66

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program through the twelfth quarter, January-March 2003, in the following task areas: Task 1--Oxygen Enhanced Combustion, Task 2--Oxygen Transport Membranes, Task 3--Economic Evaluation and Task 4--Program Management. The program is proceeding in accordance with the objectives for the third year. Pilot scale experiments conducted at the University of Utah explored both the effectiveness of oxygen addition and the best way to add oxygen with a scaled version of Riley Power's newest low NOx burner design. CFD modeling was done to compare the REI's modeling results for James River Unit 3 with the NOx and LOI results obtained during the demonstration program at that facility. Investigation of an alternative method of fabrication of PSO1d elements was conducted. OTM process development work has concluded with the completion of a long-term test of a PSO1d element Economic evaluation has confirmed the advantage of oxygen-enhanced combustion. Proposals have been submitted for two additional beta test sites. Commercial proposals have been submitted. Economic analysis of a beta site test performance was conducted.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2003-04-01T23:59:59.000Z

67

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program in the seventh quarter October-December 2001 in the following task areas: Task 1 - Oxygen Enhanced Combustion, Task 2 - Oxygen Transport Membranes, Task 3 - Economic Evaluation and Task 4 - Program Management. Computational fluid dynamic (CFD) modeling of oxygen injection strategies was performed during the quarter resulting in data that suggest the oxygen injection reduces NOx emissions while reducing LOI. Pilot-scale testing activities concluded at the University of Utah this quarter. Testing demonstrated that some experimental conditions can lead to NOx emissions well below the 0.15 lb/MMBtu limit. Evaluation of alternative OTM materials with improved mechanical properties continued this quarter. Powder procedure optimization continued and sintering trial began on an element with a new design. Several OTM elements were tested in Praxair's single tube high-pressure test facility under various conditions. A modified PSO1d element demonstrated stable oxygen product purity of >98% and oxygen flux of 68% of target. Updated test results and projected economic performance have been reviewed with the Utility Industrial Advisors. The economic comparison remains very favorable for O{sub 2} enhanced combustion. Discussions regarding possible Beta sites have been held with three other utilities in addition to the industrial advisors. Proposals will be prepared after the completion of full scale burner testing. Beta test cost estimating work has been initiated.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2002-01-01T23:59:59.000Z

68

METHANE de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

The overall project objective is the development and validation of an innovative combustion system, based on a novel coal preheating concept prior to combustion, that can reduce NO{sub x} emissions to 0.15 lb/million Btu or less on utility pulverized coal (PC) boilers. This NO{sub x} reduction should be achieved without loss of boiler efficiency or operating stability, and at more than 25% lower levelized cost than state-of-the-art SCR technology. A further objective is to ready technology for full-scale commercial deployment to meet the market demand for NO{sub x} reduction technologies. Over half of the electric power generated in the U.S. is produced by coal combustion, and more than 80% of these units utilize PC combustion technology. Conventional measures for NOx reduction in PC combustion processes rely on combustion and post-combustion modifications. A variety of combustion-based NO{sub x} reduction technologies are in use today, including low-NO{sub x} burners (LNBs), flue gas recirculation (FGR), air staging, and natural gas or other fuel reburning. Selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR) are post-combustion techniques. NO{sub x} reduction effectiveness from these technologies ranges from 30 to 60% and up to 90-93% for SCR. Typically, older wall-fired PC burner units produce NO{sub x} emissions in the range of 0.8-1.6 lb/million Btu. Low-NO{sub x} burner systems, using combinations of fuel staging within the burner and air staging by introduction of overfire air in the boiler, can reduce NO{sub x} emissions by 50-60%. This approach alone is not sufficient to meet the desired 0.15 lb/million Btu NO{sub x} standard with a range of coals and boiler loads. Furthermore, the heavy reliance on overfire air can lead to increased slagging and corrosion in furnaces, particularly with higher-sulfur coals, when LNBs are operated at sub-stoichiometric conditions to reduce fuel-derived NOx in the flame. Therefore, it is desirable to minimize the need for overfire air by maximizing NO{sub x} reduction in the burner. The proposed combustion concept aims to greatly reduce NO{sub x} emissions by incorporating a novel modification to conventional or low-NO{sub x} PC burners using gas-fired coal preheating to destroy NO{sub x} precursors and prevent NO{sub x} formation. A concentrated PC stream enters the burner, where flue gas from natural gas combustion is used to heat the PC up to about 1500 F prior to coal combustion. Secondary fuel consumption for preheating is estimated to be 3 to 5% of the boiler heat input. This thermal pretreatment releases coal volatiles, including fuel-bound nitrogen compounds into oxygen-deficient atmosphere, which converts the coal-derived nitrogen compounds to molecular N{sub 2} rather than NO. Design, installation, shakedown, and testing on Powder River Basin (PRB) coal at a 3-million Btu/h pilot system at RPI's (Riley Power, Inc.) pilot-scale combustion facility (PSCF) in Worcester, MA demonstrated that the PC PREHEAT process has a significant effect on final O{sub x} formation in the coal burner. Modifications to both the pilot system gas-fired combustor and the PC burner led to NO{sub x} reduction with PRB coal to levels below 0.15 lb/million Btu with CO in the range of 35-112 ppmv without any furnace air staging.

Bruce Bryan; Serguei Nester; Joseph Rabovitser; Stan Wohadlo

2005-09-30T23:59:59.000Z

69

NETL: News Release - DOE Selects Five NOx-Control Projects to Combat Acid  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

November 5, 2004 November 5, 2004 DOE Selects Five NOx-Control Projects to Combat Acid Rain and Smog Industry Partners to Focus on Reducing Emissions While Cutting Energy Costs PITTSBURGH, PA - Continuing efforts to cut acid rain and smog-producing nitrogen oxides (NOx) have prompted the U.S. Department of Energy to partner with industry experts to develop advanced NOx-control technologies. With the selection of five new NOx-control projects, the Energy Department continues as a leader in developing advanced technologies to achieve environmental compliance for the nation's fleet of coal-fired power plants. Although today's NOx-control workhorses, such as low-NOx burners and selective catalytic reduction (SCR), have been successfully deployed to address existing regulations, proposed regulations will require deeper cuts in NOx emissions, at a greater number of generating facilities. Many of the smaller affected plants will not be able to cost-effectively use today's technologies; these are the focus of the advanced technologies selected in this announcement.

70

NOx | OpenEI  

Open Energy Info (EERE)

NOx NOx Dataset Summary Description Emissions from energy use in buildings are usually estimated on an annual basis using annual average multipliers. Using annual numbers provides a reasonable estimation of emissions, but it provides no indication of the temporal nature of the emissions. Therefore, there is no way of understanding the impact on emissions from load shifting and peak shaving technologies such as thermal energy storage, on-site renewable energy, and demand control. Source NREL Date Released April 11th, 2011 (3 years ago) Date Updated April 11th, 2011 (3 years ago) Keywords buildings carbon dioxide emissions carbon footprinting CO2 commercial buildings electricity emission factors ERCOT hourly emission factors interconnect nitrogen oxides NOx SO2 sulfur dioxide emissions

71

Reverberatory screen for a radiant burner  

DOE Patents [OSTI]

The present invention relates to porous mat gas fired radiant burner panels utilizing improved reverberatory screens. The purpose of these screens is to boost the overall radiant output of the burner relative to a burner using no screen and the same fuel-air flow rates. In one embodiment, the reverberatory screen is fabricated from ceramic composite material, which can withstand higher operating temperatures than its metallic equivalent. In another embodiment the reverberatory screen is corrugated. The corrugations add stiffness which helps to resist creep and thermally induced distortions due to temperature or thermal expansion coefficient differences. As an added benefit, it has been unexpectedly discovered that the corrugations further increase the radiant efficiency of the burner. In a preferred embodiment, the reverberatory screen is both corrugated and made from ceramic composite material.

Gray, Paul E. (North East, MD)

1999-01-01T23:59:59.000Z

72

Alzeta porous radiant burner. CRADA final report  

SciTech Connect (OSTI)

An Alzeta Pyrocore porous radiant burner was tested for the first time at elevated pressures and mass flows. Mapping of the burner`s stability limits (flashback, blowoff, and lean extinction limits) in an outward fired configuration and hot wall environment was carried out at pressures up to 18 atm, firing rates up to 180 kW, and excess air rates up to 100%. A central composite experimental design for parametric testing within the stability limits produced statistically sound correlations of dimensionless burner temperature and NO{sub x} emissions as functions of equivalence ratio, dimensionless firing rate, and reciprocal Reynolds number. The NO{sub x} emissions were below 4 ppmvd at 15% O{sub 2} for all conditions tested, and the CO and unburned hydrocarbon levels were simultaneously low. As a direct result of this cooperative research effort between METC and Alzeta, Solar Turbines has already expressed a strong interest in this novel technology.

NONE

1995-12-01T23:59:59.000Z

73

Silane-propane ignitor/burner  

DOE Patents [OSTI]

A silane propane burner for an underground coal gasification process which is used to ignite the coal and to controllably retract the injection point by cutting the injection pipe. A narrow tube with a burner tip is positioned in the injection pipe through which an oxidant (oxygen or air) is flowed. A charge of silane followed by a supply of fuel, such as propane, is flowed through the tube. The silane spontaneously ignites on contact with oxygen and burns the propane fuel.

Hill, R.W.; Skinner, D.F. Jr.; Thorsness, C.B.

1983-05-26T23:59:59.000Z

74

Silane-propane ignitor/burner  

DOE Patents [OSTI]

A silane propane burner for an underground coal gasification process which is used to ignite the coal and to controllably retract the injection point by cutting the injection pipe. A narrow tube with a burner tip is positioned in the injection pipe through which an oxidant (oxygen or air) is flowed. A charge of silane followed by a supply of fuel, such as propane, is flowed through the tube. The silane spontaneously ignites on contact with oxygen and burns the propane fuel.

Hill, Richard W. (Livermore, CA); Skinner, Dewey F. (Livermore, CA); Thorsness, Charles B. (Livermore, CA)

1985-01-01T23:59:59.000Z

75

NOx Reduction from Biodiesel Fuels  

Science Journals Connector (OSTI)

NOx Reduction from Biodiesel Fuels ... NOx emissions appear to be different for biodiesels from different feedstocks. ... For the suite of biodiesels prepared from nearly pure fatty acids, all biodiesel fuels produced higher NOx than certification diesel with the following exceptions:? methyl palmitate, methyl laurate, ethyl stearate, and the ethyl ester of hydrogenated soybean oil. ...

Sandun Fernando; Chris Hall; Saroj Jha

2005-11-19T23:59:59.000Z

76

Burners and combustion apparatus for carbon nanomaterial production  

DOE Patents [OSTI]

The invention provides improved burners, combustion apparatus, and methods for carbon nanomaterial production. The burners of the invention provide sooting flames of fuel and oxidizing gases. The condensable products of combustion produced by the burners of this invention produce carbon nanomaterials including without limitation, soot, fullerenic soot, and fullerenes. The burners of the invention do not require premixing of the fuel and oxidizing gases and are suitable for use with low vapor pressure fuels such as those containing substantial amounts of polyaromatic hydrocarbons. The burners of the invention can operate with a hot (e.g., uncooled) burner surface and require little, if any, cooling or other forms of heat sinking. The burners of the invention comprise one or more refractory elements forming the outlet of the burner at which a flame can be established. The burners of the invention provide for improved flame stability, can be employed with a wider range of fuel/oxidizer (e.g., air) ratios and a wider range of gas velocities, and are generally more efficient than burners using water-cooled metal burner plates. The burners of the invention can also be operated to reduce the formation of undesirable soot deposits on the burner and on surfaces downstream of the burner.

Alford, J. Michael (Lakewood, CO); Diener, Michael D. (Denver, CO); Nabity, James (Arvada, CO); Karpuk, Michael (Boulder, CO)

2007-10-09T23:59:59.000Z

77

Burners and combustion apparatus for carbon nanomaterial production  

DOE Patents [OSTI]

The invention provides improved burners, combustion apparatus, and methods for carbon nanomaterial production. The burners of the invention provide sooting flames of fuel and oxidizing gases. The condensable products of combustion produced by the burners of this invention produce carbon nanomaterials including without limitation, soot, fullerenic soot, and fullerenes. The burners of the invention do not require premixing of the fuel and oxidizing gases and are suitable for use with low vapor pressure fuels such as those containing substantial amounts of polyaromatic hydrocarbons. The burners of the invention can operate with a hot (e.g., uncooled) burner surface and require little, if any, cooling or other forms of heat sinking. The burners of the invention comprise one or more refractory elements forming the outlet of the burner at which a flame can be established. The burners of the invention provide for improved flame stability, can be employed with a wider range of fuel/oxidizer (e.g., air) ratios and a wider range of gas velocities, and are generally more efficient than burners using water-cooled metal burner plates. The burners of the invention can also be operated to reduce the formation of undesirable soot deposits on the burner and on surfaces downstream of the burner.

Alford, J. Michael; Diener, Michael D; Nabity, James; Karpuk, Michael

2013-02-05T23:59:59.000Z

78

Low Emissions Burner Technology for Metal Processing Industry using Byproducts and Biomass Derived Liquid Fuels  

SciTech Connect (OSTI)

This research and development efforts produced low-emission burner technology capable of operating on natural gas as well as crude glycerin and/or fatty acids generated in biodiesel plants. The research was conducted in three stages (1) Concept definition leading to the design and development of a small laboratory scale burner, (2) Scale-up to prototype burner design and development, and (3) Technology demonstration with field vefiication. The burner design relies upon the Flow Blurring (FB) fuel injection based on aerodynamically creating two-phase flow near the injector exit. The fuel tube and discharge orifice both of inside diameter D are separated by gap H. For H < 0.25D, the atomizing air bubbles into liquid fuel to create a two-phase flow near the tip of the fuel tube. Pressurized two-phase fuel-air mixture exits through the discharge orifice, which results in expansion and breakup of air bubbles yielding a spray with fine droplets. First, low-emission combustion of diesel, biodiesel and straight VO (soybean oil) was achieved by utilizing FB injector to yield fine sprays for these fuels with significantly different physical properties. Visual images for these baseline experiments conducted with heat release rate (HRR) of about 8 kW illustrate clean blue flames indicating premixed combustion for all three fuels. Radial profiles of the product gas temperature at the combustor exit overlap each other signifying that the combustion efficiency is independent of the fuel. At the combustor exit, the NOx emissions are within the measurement uncertainties, while CO emissions are slightly higher for straight VO as compared to diesel and biodiesel. Considering the large variations in physical and chemical properties of fuels considered, the small differences observed in CO and NOx emissions show promise for fuel-flexible, clean combustion systems. FB injector has proven to be very effective in atomizing fuels with very different physical properties, and it offers a path forward to utilize both fossil and alternative liquid fuels in the same combustion system. In particular, experiments show that straight VO can be cleanly combusted without the need for chemical processing or preheating steps, which can result in significant economic and environmental benefits. Next, low-emission combustion of glycerol/methane was achieved by utilizing FB injector to yield fine droplets of highly viscous glycerol. Heat released from methane combustion further improves glycerol pre-vaporization and thus its clean combustion. Methane addition results in an intensified reaction zone with locally high temperatures near the injector exit. Reduction in methane flow rate elongates the reaction zone, which leads to higher CO emissions and lower NOx emissions. Similarly, higher air to liquid (ALR) mass ratio improves atomization and fuel pre-vaporization and shifts the flame closer to the injector exit. In spite of these internal variations, all fuel mixes of glycerol with methane produced similar CO and NOx emissions at the combustor exit. Results show that FB concept provides low emissions with the flexibility to utilize gaseous and highly viscous liquid fuels, straight VO and glycerol, without preheating or preprocessing the fuels. Following these initial experiments in quartz combustor, we demonstrated that glycerol combustion can be stably sustained in a metal combustor. Phase Doppler Particle Analyzer (PDPA) measurements in glycerol/methane flames resulted in flow-weighted Sauter Mean Diameter (SMD) of 35 to 40 ?m, depending upon the methane percentage. This study verified that lab-scale dual-fuel burner using FB injector can successfully atomize and combust glycerol and presumably other highly viscous liquid fuels at relatively low HRR (<10 kW). For industrial applications, a scaled-up glycerol burner design thus seemed feasible.

Agrawal, Ajay; Taylor, Robert

2013-09-30T23:59:59.000Z

79

Influence of reactive species on the lean blowout limit of an industrial DLE gas turbine burner  

Science Journals Connector (OSTI)

Abstract In order to achieve ultra-low emissions of both NOX and CO it is imperative to use a homogeneous premixed combustor. To lower the emissions further, the equivalence ratio can be lowered. By doing so, combustion is moved towards the lean blowout (LBO) limit. To improve the blowout characteristics of a burner, heat and radicals can be supplied to the flame zone. This can be achieved using a pre-chamber combustor. In this study, a central body burner, called the RPL (rich-pilot-lean) section, was used as a pre-chamber combustor to supply heat and radicals to a downscaled industrial burner. The flue gas from the RPL is mixed with the surrounding fresh mixture and form a second flame zone. This zone acts as a stabilizer for the investigated burner. The LBO limit was modeled using two perfectly stirred reactors (PSRs) in series, which allows the chemical influence on the LBO limit to be isolated. The resulting trends for the modeled LBO limit were in agreement with measured data. Increasing the equivalence ratio in the RPL section, thus increasing the energy supplied by the fuel, is a major contributor to combustion stability up to a limit where the temperature decrease is too large support combustion. For lean RPL combustion, the reactive species O, H and OH in combination affect the stability to a greater extent than the temperature alone. At rich equivalence ratios, the conversion of methane to hydrogen and carbon monoxide in the RPL section is a factor influencing the LBO limit. The results are compared with emission probe measurements that were used to investigate the LBO limit for methane and a generic syngas (10% CH4, 67.5% H2, and 22.5% CO). The syngas was also investigated after being diluted with nitrogen to a Wobbe index of 15 MJ/m3.

Ivan R. Sigfrid; Ronald Whiddon; Robert Collin; Jens Klingmann

2014-01-01T23:59:59.000Z

80

LN Innovative Technologies | Open Energy Information  

Open Energy Info (EERE)

Israel Sector Services Product General Financial & Legal Services ( Partnership (investment, law etc) ) References LN Innovative Technologies1 LinkedIn Connections CrunchBase...

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Measurement and Characterization of NOx Adsorber Regeneration...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Combustion with Lean-NOx Trap Yields Progress Toward Targets of Efficient NOx Control for Diesels Intra-catalyst Reductant Chemistry in Lean NOx Traps: A Study on Sulfur Effects...

82

Global Nuclear Energy Partnership Fact Sheet - Develop Advanced Burner  

Broader source: Energy.gov (indexed) [DOE]

Develop Advanced Develop Advanced Burner Reactors Global Nuclear Energy Partnership Fact Sheet - Develop Advanced Burner Reactors GNEP will develop and demonstrate Advanced Burner Reactors (ABRs) that consume transuranic elements (plutonium and other long-lived radioactive material) while extracting their energy. The development of ABRs will allow us to build an improved nuclear fuel cycle that recycles used fuel. Accordingly, the U.S. will work with participating international partners on the design, development, and demonstration of ABRs as part of the GNEP. Global Nuclear Energy Partnership Fact Sheet - Develop Advanced Burner Reactors More Documents & Publications GNEP Element:Develop Advanced Burner Reactors Global Nuclear Energy Partnership Fact Sheet - Minimize Nuclear Waste

83

Compact Potentiometric NOx Sensor | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Potentiometric NOx Sensor Compact Potentiometric NOx Sensor 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

84

9, 11231155, 2009 Lightning NOx  

E-Print Network [OSTI]

of lightning intensities. By im-20 posing an updated lightning NO production value of 520 mol NO/Flash, weACPD 9, 1123­1155, 2009 Lightning NOx emissions over the USA investigated using TES L. Jourdain et to the corresponding final paper in ACP if available. Lightning NOx emissions over the USA investigated using TES, NLDN

85

NETL: Advanced NOx Emissions Control: Control Technology - Model for NOx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Model for NOx Emissions in Biomass Cofiring Model for NOx Emissions in Biomass Cofiring Southern Research Institute is developing a validated tool or methodology to accurately and confidently design and optimize biomass-cofiring systems for full-scale utility boilers to produce the lowest NOX emissions and the least unburned carbon. The computer model will be validated through an extensive set of tests at the 6 MMBtu/hr pilot combustor in the Southern Company/Southern Research Institute Combustion Research Facility. Full-scale demonstration testing can be compared to the model for further validation. The project is designed to balance the development of a systematic and expansive database detailing the effects of cofiring parameters on NOx formation with the complementary modeling effort that will yield a capability to predict, and therefore optimize, NOx reductions by the selection of those parameters. The database of biomass cofiring results will be developed through an extensive set of pilot-scale tests at the Southern Company/Southern Research Institute Combustion Research Facility. The testing in this program will monitor NOx, LOI, and other emissions over a broad domain of biomass composition, coal quality, and cofiring injection configurations to quantify the dependence of NOx formation and LOI on these parameters. This database of cofiring cases will characterize an extensive suite of emissions and combustion properties for each of the fuel and injection configuration combinations tested.

86

Nox1 and Nox4 enzymes are persistently elevated in human hepatocytes producing infectious hepatitis C virus  

E-Print Network [OSTI]

location of NOX4 and NOX1 enzymes by cell fractionation. 6.13. Proposed role of hepatocyte NOX enzymes in HCV-inducedMERCED Nox1 and Nox4 enzymes are persistently elevated in

Reyes de Mochel, Nabora Soledad

2009-01-01T23:59:59.000Z

87

Fuel burner and combustor assembly for a gas turbine engine  

DOE Patents [OSTI]

A fuel burner and combustor assembly for a gas turbine engine has a housing within the casing of the gas turbine engine which housing defines a combustion chamber and at least one fuel burner secured to one end of the housing and extending into the combustion chamber. The other end of the fuel burner is arranged to slidably engage a fuel inlet connector extending radially inwardly from the engine casing so that fuel is supplied, from a source thereof, to the fuel burner. The fuel inlet connector and fuel burner coact to anchor the housing against axial movement relative to the engine casing while allowing relative radial movement between the engine casing and the fuel burner and, at the same time, providing fuel flow to the fuel burner. For dual fuel capability, a fuel injector is provided in said fuel burner with a flexible fuel supply pipe so that the fuel injector and fuel burner form a unitary structure which moves with the fuel burner.

Leto, Anthony (Franklin Lakes, NJ)

1983-01-01T23:59:59.000Z

88

Refinery burner simulation design architecture summary.  

SciTech Connect (OSTI)

This report describes the architectural design for a high fidelity simulation of a refinery and refinery burner, including demonstrations of impacts to the refinery if errors occur during the refinery process. The refinery burner model and simulation are a part of the capabilities within the Sandia National Laboratories Virtual Control System Environment (VCSE). Three components comprise the simulation: HMIs developed with commercial SCADA software, a PLC controller, and visualization software. All of these components run on different machines. This design, documented after the simulation development, incorporates aspects not traditionally seen in an architectural design, but that were utilized in this particular demonstration development. Key to the success of this model development and presented in this report are the concepts of the multiple aspects of model design and development that must be considered to capture the necessary model representation fidelity of the physical systems.

Pollock, Guylaine M.; McDonald, Michael James; Halbgewachs, Ronald D.

2011-10-01T23:59:59.000Z

89

PULSE DRYING EXPERIMENT AND BURNER CONSTRUCTION  

SciTech Connect (OSTI)

Non steady impingement heat transfer is measured. Impingement heating consumes 130 T-BTU/Yr in paper drying, but is only 25% thermally efficient. Pulse impingement is experimentally shown to enhance heat transfer by 2.8, and may deliver thermal efficiencies near 85%. Experimental results uncovered heat transfer deviations from steady theory and from previous investigators, indicating the need for further study and a better theoretical framework. The pulse burner is described, and its roll in pulse impingement is analyzed.

Robert States

2006-07-15T23:59:59.000Z

90

Advanced Burners and Combustion Controls for Industrial Heat Recovery Systems  

E-Print Network [OSTI]

ADVANCED BURNERS AND COMBUSTION CONTROLS FOR INDUSTRIAL HEAT RECOVERY SYSTEMS J.L.FERRI GTE PRODUCTS CORPORATION TOWANDA, PA ABSTRACT When recuperators are installed on indus trial furnaces, burners and ratio control systems must... recuperators by demonstrating their technical and economi cal feasibility in well monitored field installations (1). During the contract, it became evident to GTE that a systems approach (recuperator, burner, and con troIs) is necessary to be accepted...

Ferri, J. L.

91

7 - Oxy-coal burner design for utility boilers  

Science Journals Connector (OSTI)

Abstract: This chapter discusses the design of oxy-coal burners intended for application in utility boilers, with the understanding that this is an emerging technology. Physical and operational constraints on the oxy-fired design are discussed, relative to traditional air-fired burners. These constraints result in an oxy-fired flame with delayed ignition and inhibited flame stability. Additional degrees of freedom are introduced into the burner design and operation with the use of pure oxygen. Leveraging these degrees of freedom allows the design of an air-like oxy-coal burner and firing system that will produce a stable flame with tailored shape and heat transfer profile.

J. Shan; A. Fry

2011-01-01T23:59:59.000Z

92

Successful low NO{sub x} burner retrofit at Delmarva Power`s Edge Moor {number_sign}5  

SciTech Connect (OSTI)

A team approach between the low NO{sub x} burner supplier, the architect engineer and the utility customer has led to a successful NO{sub x} reduction program that was brought in on time and under budget. Delmarva Power`s Edge Moor No. 5 a 440 MW ``El Paso`` style oil and natural gas fired unit, was successfully retrofitted with twenty-eight (28) TODD Combustion Dynaswirl-LN burners. A 55% reduction in NO{sub x} was achieved compared to the existing system of burners and overfire air; a 40% reduction was achieved with the OFA set at minimum. In addition to the NO{sub x} reduction, CO and opacity problems were reduced, excess O{sub 2} was reduced, steam temperatures were maintained and FD fan requirements were reduced. A combination of windbox modeling and advanced atomization techniques allowed the OFA ports to be fully opened, enhancing their NO{sub x} reduction effectiveness. The results presented in this paper are the first part of an on going study to determine the long term effectiveness of a LNB retrofit on NO{sub x} emission rates.

Deater, S.W.; Ward, H.J. [Delmarva Power and Light Co., Wilmington, DE (United States); Paschadag, A.E. [Burns and Roe Co., Oradell, NJ (United States); Schindler, E.S.; Guarco, J.P. [TODD Combustion, Inc., Shelton, CT (United States)

1995-12-31T23:59:59.000Z

93

Combustion analysis of an equimolar mixture of methane and syngas in a surface-stabilized combustion burner for household appliances  

Science Journals Connector (OSTI)

Abstract The primary objective of this work is to study the combustion of an equimolar mixture of methane and syngas (CH4–SG) in a ceramic surface-stabilized combustion burner. We examine the effects of the fuel composition, the air-to-fuel ratio and the thermal input on the flame stability, the radiation efficiency and the pollutant emissions (CO and NOx). In this study, we evaluate a syngas with a high hydrogen content that is similar to those obtained by coal gasification (50–60% H2) using Sasol/Lurgi gasification technology and biomass gasification, for example. To determine the effect of the air-to-fuel ratio (?), the burner performance is analyzed at ? = 1.4 and ? = 1.1. Some studies have reported optimal operating conditions for ? = 1.4, whereas for hydrocarbons, the proximity to stoichiometric conditions at the ? = 1.1 air-to-fuel ratio produces the highest possible laminar burning velocity and flame temperature. The thermal inputs evaluated in this study correspond to three values (1.0, 1.8, and 2.5 kW) found in household appliances and for cooking appliances in particular. The results for this experimental burner design indicate that the macroscopic flame shape for an equimolar CH4–SG mixture is approximately the same as that for CH4. Moreover, the pollutant concentrations in the flue gas are generally below 85 ppm for CO and 15 ppm for NOx. However, the thermal input and the air-to-fuel ratio significantly affect the flame structure, the radiation efficiency and the pollutant emissions.

Carlos E. Arrieta; Andrés A. Amell

2014-01-01T23:59:59.000Z

94

Transient Dynamometer Testing of a Single Leg NOx Adsorber Combined...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Transient Dynamometer Testing of a Single Leg NOx Adsorber Combined with a Fuel Processor for Enhanced NOx Control Transient Dynamometer Testing of a Single Leg NOx Adsorber...

95

Benchmark Reaction Mechanisms and Kinetics for Lean NOx Traps...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Benchmark Reaction Mechanisms and Kinetics for Lean NOx Traps Development of Chemical Kinetic Models for Lean NOx Traps Modeling the Regeneration Chemistry of Lean NOx Traps...

96

Residential oil burners with low input and two stages firing  

SciTech Connect (OSTI)

The residential oil burner market is currently dominated by the pressure-atomized, retention head burner. At low firing rates pressure atomizing nozzles suffer rapid fouling of the small internal passages, leading to bad spray patterns and poor combustion performance. To overcome the low input limitations of conventional burners, a low pressure air-atomized burner has been developed watch can operate at fining rates as low as 0.25 gallons of oil per hour (10 kW). In addition, the burner can be operated in a high/low fining rate mode. Field tests with this burner have been conducted at a fixed input rate of 0.35 gph (14 kW) with a side-wall vented boiler/water storage tank combination. At the test home, instrumentation was installed to measure fuel and energy flows and record trends in system temperatures. Laboratory efficiency testing with water heaters and boilers has been completed using standard single purpose and combined appliance test procedures. The tests quantify benefits due to low firing rates and other burner features. A two stage oil burner gains a strong advantage in rated efficiency while maintaining capacity for high domestic hot water and space heating loads.

Butcher, T.; Krajewski, R.; Leigh, R. [and others

1997-12-31T23:59:59.000Z

97

Turbine Burners: Flameholding in Accelerating Flow W. A. Sirignano1  

E-Print Network [OSTI]

1 Turbine Burners: Flameholding in Accelerating Flow W. A. Sirignano1 , D. Dunn-Rankin2 , F. Liu3 B, Irvine Abstract A review of turbine-burner research and some relevant background issues is presented. Previous work on thermal cycle analysis for augmentative combustion in the passages of the turbine

Liu, Feng

98

Method for control of NOx emission from combustors using fuel dilution  

DOE Patents [OSTI]

A method of controlling NOx emission from combustors. The method involves the controlled addition of a diluent such as nitrogen or water vapor, to a base fuel to reduce the flame temperature, thereby reducing NOx production. At the same time, a gas capable of enhancing flame stability and improving low temperature combustion characteristics, such as hydrogen, is added to the fuel mixture. The base fuel can be natural gas for use in industrial and power generation gas turbines and other burners. However, the method described herein is equally applicable to other common fuels such as coal gas, biomass-derived fuels and other common hydrocarbon fuels. The unique combustion characteristics associated with the use of hydrogen, particularly faster flame speed, higher reaction rates, and increased resistance to fluid-mechanical strain, alter the burner combustion characteristics sufficiently to allow operation at the desired lower temperature conditions resulting from diluent addition, without the onset of unstable combustion that can arise at lower combustor operating temperatures.

Schefer, Robert W. (Alamo, CA); Keller, Jay O (Oakland, CA)

2007-01-16T23:59:59.000Z

99

Advanced oil burner for residential heating -- development report  

SciTech Connect (OSTI)

The development of advanced oil burner concepts has long been a part of Brookhaven National Laboratory`s (BNL) oil heat research program. Generally, goals of this work include: increased system efficiency, reduced emissions of soot and NO{sub x}, and the practical extension of the firing rate range of current burners to lower input rates. The report describes the results of a project at BNL aimed at the development of air atomized burners. Two concepts are discussed. The first is an air atomizer which uses air supplied at pressures ranging from 10 to 20 psi and requiring the integration of an air compressor in the system. The second, more novel, approach involves the use of a low-pressure air atomizing nozzle which requires only 8-14 inches of water air pressure for fuel atomization. This second approach requires the use of a fan in the burner instead of a compressor although the fan pressure is higher than with conventional, pressure atomized retention head burners. In testing the first concept, high pressure air atomization, a conventional retention head burner was modified to accept the new nozzle. In addition, the burner head was modified to reduce the flow area to maintain roughly 1 inch of water pressure drop across the head at a firing rate of 0.25 gallons of oil per hour. The burner ignited easily and could be operated at low excess air levels without smoke. The major disadvantage of this burner approach is the need for the air compressor as part of the system. In evaluating options, a vane-type compressor was selected although the use of a compressor of this type will lead to increased burner maintenance requirements.

Butcher, T.A.

1995-07-01T23:59:59.000Z

100

Initial test results of the limestone injection multistage burner (LIMB) demonstration project. Report for September 1984-April 1988  

SciTech Connect (OSTI)

This paper discusses SO/sub 2/ removal efficiency and low-NOx burner performance obtained during short term tests, as well as the impact of LIMB ash on electrostatic precipitator (ESP) performance at Ohio Edison's Edgewater Station. Project goals are to demonstrate 50% or more SO/sub 2/ removal at a Ca/S molar stoichiometry of 2.0 and NOx emissions of less than 0.5 lb/million Btu while maintaining boiler operability and reliability. The tests, conducted before September 1987, indicated that 55-60% SO/sub 2/ removal and NOx emissions on the order of 0.48 lb/million Btu are achievable. The increased dust loading of a high-resistivity ash typically limited continuous operation to 2-6 hr. The paper discusses how the LIMB ash gave rise to back corona which, in turn, increased stack opacity to regulated levels. The extension of the project to include humidification of the flue gas is also described as a way to minimize these effects.

Nolan, P.S.; Hendriks, R.V.

1988-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Control of NOx by combustion process modifications  

E-Print Network [OSTI]

A theoretical and experimental study was carried out to determine lower bounds of NOx emission from staged combustion of a 0.7%N #6 fuel oil. Thermodynamic and chemical kinetic calculations have shown minimum NOx emissions ...

Ber?, J. M.

1981-01-01T23:59:59.000Z

102

AGGRESSTVEBEHAVIOR Volurne18,pagesll7-ln  

E-Print Network [OSTI]

AGGRESSTVEBEHAVIOR Volurne18,pagesll7-ln DoGirlsManipulateandBoysFight? Developmental dilference between the genders has been thought to be that boys use physical aggressivestrategies, wbile Psychology, AUo emaemi, Nunnank. 4, SF-20500'Ibrku,Finland. @ 1992 lViley-Liss, Inc. #12;I 18 Bjdrk4vistetal

Dever, Jennifer A.

103

SAS Output  

U.S. Energy Information Administration (EIA) Indexed Site

4. Nitrogen Oxides Control Technology Emissions Reduction Factors 4. Nitrogen Oxides Control Technology Emissions Reduction Factors Nitrogen Oxides Control Technology EIA-Code(s) Reduction Factor Advanced Overfire Air AA 30% Alternate Burners BF 20% Flue Gas Recirculation FR 40% Fluidized Bed Combustor CF 20% Fuel Reburning FU 30% Low Excess Air LA 20% Low NOx Burners LN 30% Other (or Unspecified) OT 20% Overfire Air OV 20% Selective Catalytic Reduction SR 70% Selective Catalytic Reduction With Low Nitrogen Oxide Burners SR and LN 90% Selective Noncatalytic Reduction SN 30% Selective Noncatalytic Reduction With Low NOx Burners SN and LN 50% Slagging SC 20% Notes: Starting with 1995 data, reduction factors for Advanced Overfire Air, Low NOx Burners, and Overfire Air were reduced by 10 percent.

104

METHANE de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

The primary focus for the project during the quarter was shakedown testing of the large-scale coal preheater prototype in the CBTF with non-caking PRB coal. Additional pilot-scale tests were conducted in the PSCF in support of developing a preheating system design suitable for use with caking coals. Thirty-two additional pilot tests were conducted during the quarter with caking coal. These tests further evaluated the use of the air-bleed and indirect air-cooled liner designs to reduce or eliminate combustor plugging with caking coal. The air-bleed configurations tested used air injection holes perpendicular to the liner's longitudinal axis with the number, size and air flow though the air-bleed holes varied to determine the effect on combustor plugging. The indirect cooling configurations tested included a stainless steel liner with spiral fins in the annular space between the liner and the combustor wall, and a silicon carbide liner without fins. Continuous pilot operation was maintained for up to 30 minutes at a coal feed rate of 50 lb/h with the air-bleed liner. The best result achieved was for the stainless steel indirect air-cooled liner with 20 minutes of continuous operation at 126 lb/h of coal followed by an additional 20 minutes at 150 lb/h. The NOx results from these continue to indicate that even greater NOx reduction is possible with caking coal than with the PRB coal tested. The installation of the large-scale prototype coal preheater for PRB testing in the CBTF was completed and shakedown testing with natural gas and PRB coal started during the quarter. Stable operation of the coal system, combustor and burner were achieved at coal feed rates up to 6000 lb/h (50 MMBtu/h).

Bruce Bryan; Joseph Rabovitser Serguei Nester; Stan Wohadlo

2004-06-30T23:59:59.000Z

105

J.R. Simplot: Burner Upgrade Project Improves Performance and...  

Broader source: Energy.gov (indexed) [DOE]

Company saved energy and money by increasing the efficiency of the steam system in its potato processing plant in Caldwell, Idaho. J.R. Simplot: Burner Upgrade Project Improves...

106

Selective diagnostics of combustion processes in multi-burner boilers  

Science Journals Connector (OSTI)

The process of gas hydrocarbon combustion was tested in real (industrial) conditions on boilers with many burners. For key operation modes, the main regularities of emission from single flames were studied. Th...

S. M. Borzov; V. V. Garkusha; V. I. Kozik; V. P. Mikheev…

107

Development of a dry low-NOx gas turbine combustor for a natural-gas fueled 2MW co-generation system  

SciTech Connect (OSTI)

A dry low-NOx gas turbine combustor has been developed for natural-gas fueled co-generation systems in the power range of 1--4MW. The combustor. called the Double Swirler Combustor, uses the lean premixed combustion to reduce NOx emission. The combustor is characterized by two staged lean premixed combustion with two coaxial annular burners and a simple fuel control system without the complex variable geometry. Substantially low NOx level has been achieved to meet the strict NOx regulation to co-generation systems in Japan. High combustion efficiency has been obtained for a wide operating range. In 1994, Tokyo Gas and Ishikawajima-Harima Heavy Industries initiated a collaborative program to develop a natural-gas fueled low NOx gas turbine engine for new 2MW class co-generation system, named IM270. The Double Swirler Combustor, originally developed by Tokyo Gas, was introduced into the natural gas fueled version of the IM270. Engine test of the first production unit was successfully conducted to confirm substantially low NOx level of less than 15 ppm (O{sub 2} = 16%) with the output power of more than 2MW. Test for the durability and the reliability of the system is being conducted at Tokyo Gas Negishi LNG Terminal in Kanagawa, Japan and successful results have been so far obtained.

Mori, Masaaki; Sato, Hiroshi

1998-07-01T23:59:59.000Z

108

NETL: Advanced NOx Emissions Control: Control Technology - Ultra Low-NOx  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ultra Low NOx Integrated System Ultra Low NOx Integrated System TFS 2000(tm) Low NOx Firing System Project Summary: ALSTOM Power Inc.'s Power Plant Laboratories, working in concert with ALSTOM Power's Performance Projects Group, has teamed with the U.S. Department of Energy's National Energy Technology Laboratory (DOE NETL) to conduct a comprehensive study to develop/evaluate low-cost, efficient NOx control technologies for retrofit to pulverized coal fired utility boilers. The objective of this project was to develop retrofit NOx control technology to achieve less than 0.15 lb/MMBtu NOx (for bituminous coals) and 0.10 lb/MMBtu NOx (for subbituminous coals) from existing pulverized coal fired utility boilers at a cost which is at least 25% less than SCR technology. Efficient control of NOx is seen as an important,

109

Dual-water mixture fuel burner  

DOE Patents [OSTI]

A coal-water mixture (CWM) burner includes a conically shaped rotating cup into which fuel comprised of coal particles suspended in a slurry is introduced via a first, elongated inner tube coupled to a narrow first end portion of the cup. A second, elongated outer tube is coaxially positioned about the first tube and delivers steam to the narrow first end of the cup. The fuel delivery end of the inner first tube is provided with a helical slot on its lateral surface for directing the CWM onto the inner surface of the rotating cup in the form of a uniform, thin sheet which, under the influence of the cup's centrifugal force, flows toward a second, open, expanded end portion of the rotating cup positioned immediately adjacent to a combustion chamber. The steam delivered to the rotating cup wets its inner surface and inhibits the coal within the CWM from adhering to the rotating cup. A primary air source directs a high velocity air flow coaxially about the expanded discharge end of the rotating cup for applying a shear force to the CWM in atomizing the fuel mixture for improved combustion. A secondary air source directs secondary air into the combustion chamber adjacent to the outlet of the rotating cup at a desired pitch angle relative to the fuel mixture/steam flow to promote recirculation of hot combustion gases within the ignition zone for increased flame stability.

Brown, Thomas D. (Finleyville, PA); Reehl, Douglas P. (Pittsburgh, PA); Walbert, Gary F. (Library, PA)

1986-08-05T23:59:59.000Z

110

Reducing NOx in Fired Heaters and Boilers  

E-Print Network [OSTI]

-6, 2000 Reducing NOx in Fired Heaters Air Pollution Control and Boilers Keeping the environment clean Presented by Ashutosh Garg Furnace Improvements Low cost solutions for fired heaters Trace compounds ? Nitric oxides ? Carbon monoxide ? Sulfur... it is essential to estimate accurately baseline NOx emissions. ? This will establish each units current compliance status. ? Emissions ? Current excess air level ? Carbon monoxide ? Combustibles ? NOx corrected to 3% 02 314 ESL-IE-00-04-46 Proceedings...

Garg, A.

111

CLEERS Activities: Diesel Soot Filter Characterization & NOx...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Control Fundamentals CLEERS Activities: Diesel Soot Filter Characterization & NOx Control Fundamentals 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit...

112

Fe Promoted NOx Storage Materials: Structural Properties and NOx Uptake  

Science Journals Connector (OSTI)

According to the European Union regulations (EURO VI),(2) by the end of 2014, diesel passenger cars will be subject to a 3-fold decrease in NOx emissions from 0.25 to 0.08 g km?1. ... Barium oxide crystallizes in the rock salt structure, and the first order Raman scattering is symmetry forbidden(32, 33) However, broad and weak bands within 350?500 cm?1 due to the lattice modes of the defective BaO domains can still be visible via Raman spectroscopy (see for instance, Figure 3 in the Supporting Information). ...

Emine Kayhan; Stanislava M. Andonova; Go?ksu S. S?entu?rk; Charles C. Chusuei; Emrah Ozensoy

2009-12-11T23:59:59.000Z

113

Flame quality monitor system for fixed firing rate oil burners  

DOE Patents [OSTI]

A method and apparatus for determining and indicating the flame quality, or efficiency of the air-fuel ratio, in a fixed firing rate heating unit, such as an oil burning furnace, is provided. When the flame brightness falls outside a preset range, the flame quality, or excess air, has changed to the point that the unit should be serviced. The flame quality indicator output is in the form of lights mounted on the front of the unit. A green light indicates that the flame is about in the same condition as when the burner was last serviced. A red light indicates a flame which is either too rich or too lean, and that servicing of the burner is required. At the end of each firing cycle, the flame quality indicator goes into a hold mode which is in effect during the period that the burner remains off. A yellow or amber light indicates that the burner is in the hold mode. In this mode, the flame quality lights indicate the flame condition immediately before the burner turned off. Thus the unit can be viewed when it is off, and the flame condition at the end of the previous firing cycle can be observed.

Butcher, Thomas A. (Pt. Jefferson, NY); Cerniglia, Philip (Moriches, NY)

1992-01-01T23:59:59.000Z

114

Hydrothermal synthesis of Ln(OH)3 nanorods and the conversion to Ln2O3 (Ln = Eu, Nd, Dy) nanorods via annealing process  

Science Journals Connector (OSTI)

One-dimensional rare earth oxides and hydroxides are of importance in many applications due to their rich physicochemical properties. In this work, we synthesized Ln(OH)3 (Ln = Eu, Nd, Dy) nanorods by a hydrothermal method with the assistance ...

Yanhua Zhu, Xiang Zhai, Lingling Wang

2013-01-01T23:59:59.000Z

115

High Efficiency Burners by Retrofit - A Simple Inexpensive Way to Improve Combustion Efficiency  

E-Print Network [OSTI]

Existing direct fired process heaters and steam boilers can have their efficiencies remarkably improved, and thus cut the fuel bill, by conversion from conventional type natural draft burners to high intensity, "forced draft" type burners...

Rogers, W. T.

1980-01-01T23:59:59.000Z

116

Applying methods of numerical modeling to optimize a plasma burner of atmospheric pressure  

Science Journals Connector (OSTI)

The shape of a plasma burner is optimized by the methods of numerical modeling. Vortex-free flow is created in the burner merely at the expense of selecting the external tube profile rather than by introductio...

S. M. Perminov; V. N. Perminova…

1993-09-01T23:59:59.000Z

117

E-Print Network 3.0 - atomized oil burner Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

oil burner Search Powered by Explorit Topic List Advanced Search Sample search results for: atomized oil burner Page: << < 1 2 3 4 5 > >> 1 Wood Waste -A Modern Fuel M. A. SERRELL,...

118

Transmural Catalysis - High Efficiency Catalyst Systems for NOx...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Transmural Catalysis - High Efficiency Catalyst Systems for NOx Adsorbers and SCR Transmural Catalysis - High Efficiency Catalyst Systems for NOx Adsorbers and SCR Presentation...

119

SCR Technologies for NOx Reduction | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Technologies for NOx Reduction SCR Technologies for NOx Reduction 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters 2005deerhesser.pdf More...

120

An Improvement of Diesel PM and NOx Reduction System | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

& Publications Development on simultaneous reduction system of NOx and PM from a diesel engine An Improvement of Diesel PM and NOx Reduction System New Diesel Emissions...

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Development on simultaneous reduction system of NOx and PM from...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

More Documents & Publications An Improvement of Diesel PM and NOx Reduction System An Improvement of Diesel PM and NOx Reduction System EPA Mobile Source Rule Update...

122

Passive Catalytic Approach to Low Temperature NOx Emission Abatement...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Catalytic Approach to Low Temperature NOx Emission Abatement Passive Catalytic Approach to Low Temperature NOx Emission Abatement Numerically evaluated and optimized proposed...

123

Three-Dimensional Composite Nanostructures for Lean NOx Emission...  

Broader source: Energy.gov (indexed) [DOE]

Three-Dimensional Composite Nanostructures for Lean NOx Emission Control Three-Dimensional Composite Nanostructures for Lean NOx Emission Control 2010 DOE Vehicle Technologies and...

124

Effect of Biodiesel Blends on NOx Emissions | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Biodiesel Blends on NOx Emissions Effect of Biodiesel Blends on NOx Emissions Poster presentation at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007)....

125

H2-Assisted NOx Traps: Test Cell Results Vehicle Installations...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

H2-Assisted NOx Traps: Test Cell Results Vehicle Installations H2-Assisted NOx Traps: Test Cell Results Vehicle Installations 2003 DEER Conference Presentation: ArvinMeritor...

126

Enhanced High and Low Temperature Performance of NOx Reduction...  

Broader source: Energy.gov (indexed) [DOE]

Enhanced High and Low Temperature Performance of NOx Reduction Materials Enhanced High and Low Temperature Performance of NOx Reduction Materials 2013 DOE Hydrogen and Fuel Cells...

127

Virtual Oxygen Sensor for Innovative NOx and PM Emission Control...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Virtual Oxygen Sensor for Innovative NOx and PM Emission Control Technologies Virtual Oxygen Sensor for Innovative NOx and PM Emission Control Technologies A virtual O2 sensor for...

128

Modeling the Regeneration Chemistry of Lean NOx Traps | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

the Regeneration Chemistry of Lean NOx Traps Modeling the Regeneration Chemistry of Lean NOx Traps Presentation given at DEER 2006, August 20-24, 2006, Detroit, Michigan. Sponsored...

129

Electrochemical NOxSensor for Monitoring Diesel Emissions | Department...  

Broader source: Energy.gov (indexed) [DOE]

Diesel Emissions Electrochemical NOxSensor for Monitoring Diesel Emissions pm02glass.pdf More Documents & Publications Electrochemical NOx Sensor for Monitoring Diesel...

130

Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste |  

Broader source: Energy.gov (indexed) [DOE]

Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste December 6, 2011 - 3:57pm Addthis Dale and Sharon Borgford, small business owners in Stevens County, WA, break ground with Peter Goldmark, Washington State Commissioner of Public Lands. The pair brought more than 75 jobs to the area with help from DOE's State Energy Program and the U.S. Forest Service. | Photo courtesy of Washington DNR. Dale and Sharon Borgford, small business owners in Stevens County, WA, break ground with Peter Goldmark, Washington State Commissioner of Public Lands. The pair brought more than 75 jobs to the area with help from DOE's State Energy Program and the U.S. Forest Service. | Photo courtesy of

131

Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste |  

Broader source: Energy.gov (indexed) [DOE]

Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste Biomass Burner Cogenerates Jobs and Electricity from Lumber Mill Waste December 6, 2011 - 3:57pm Addthis Dale and Sharon Borgford, small business owners in Stevens County, WA, break ground with Peter Goldmark, Washington State Commissioner of Public Lands. The pair brought more than 75 jobs to the area with help from DOE's State Energy Program and the U.S. Forest Service. | Photo courtesy of Washington DNR. Dale and Sharon Borgford, small business owners in Stevens County, WA, break ground with Peter Goldmark, Washington State Commissioner of Public Lands. The pair brought more than 75 jobs to the area with help from DOE's State Energy Program and the U.S. Forest Service. | Photo courtesy of

132

Low-Emissions Burner Technology using Biomass-Derived Liquid Fuels  

Broader source: Energy.gov [DOE]

Factsheet summarizing Univ. of Alabama project to save energy and reduce emissions with fuel-flexible burners

133

CHP Integrated with Burners for Packaged Boilers- Fact Sheet, April 2014  

Broader source: Energy.gov [DOE]

Fact sheet overviewing how this project will develop and integrate the Boiler Burner Energy System Technology (BBEST)

134

Development of an air-atomized oil burner  

SciTech Connect (OSTI)

A new concept for the design of a residential oil burner is presented involving a low pressure, air atomizing nozzle. Advantages of this approach, relative to conventional, pressure atomized burners include: ability to operate at very low excess air levels without smoke, ability to operate at low (and possibly variable) rates, reduced boiler fouling, and low NO{sub x}. The nozzle used is a low pressure, airblast atomizer which can achieve fuel spray drop sizes similar to conventional nozzles and very good combustion performance with air pressure as low as 5 inches of water (1.24 kPa). A burner head has been developed for this nozzle and combustion test results are presented in a wide variety of equipment including cast iron and steel boilers, warm air furnaces, and water heaters over the firing rate range 0.25 gph to 1.0 gph (10 to 41 kW). Beyond the nozzle and combustion head the burner system must be developed and two approaches have been taken. The first involves a small, brushless DC motor/fan combination which uses high fan speed to achieve air pressures from 7 to 9 inches of water (1.74 to 2.24 kPa). Fuel is delivered to the atomizer at less than 1 psig (6.9 kPa) using a solenoid pump and flow metering orifice. At 0.35 gph (14 kW) the electric power draw of this burner is less than 100 watts. In a second configuration a conventional motor is used with a single stage fan which develops 5 to 6 inches of water pressure (1.24 to 1.50 kPa) at similar firing rates. This burner uses a conventional type fuel pump and metering orifice to deliver fuel. The fuel pump is driven by the fan motor, very much like a conventional burner. This second configuration is seen as more attractive to the heating industry and is now being commercialized. Field tests with this burner have been conducted at 0.35 gph (14 kW) with a side-wall vented boiler/water storage tank combination.

Butcher, T.A.; Celebi, Y.

1996-06-01T23:59:59.000Z

135

BURNER DEVELOPMENT AND OPERABILITY ISSUES ASSOCIATED WITH STEADY FLOWING SYNGAS  

E-Print Network [OSTI]

BURNER DEVELOPMENT AND OPERABILITY ISSUES ASSOCIATED WITH STEADY FLOWING SYNGAS FIRED COMBUSTORS Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA 2 UCI Combustion Laboratory, University-Mu¨nchen, Garching, Germany This article addresses the impact of syngas fuel composition on combustor blowout, flash

Lieuwen, Timothy C.

136

Study of the Effects of Ambient Conditions Upon the Performance of Fan Powered, Infrared Natural Gas Burners  

SciTech Connect (OSTI)

The objective of this investigation was to characterize the operation of a fan-powered, infrared burner (IR burner) at various gas compositions and ambient conditions, develop numerical model to simulate the burner performances, and provide design guidelines for appliances containing PIR burners for satisfactory performance.

Clark Atlanta University

2002-12-02T23:59:59.000Z

137

VARIABLE FIRING RATE OIL BURNER USING PULSE FUEL FLOW CONTROL.  

SciTech Connect (OSTI)

The residential oil burner market is currently dominated by the pressure-atomized retention head burner, which has an excellent reputation for reliability and efficiency. In this burner, oil is delivered to a fuel nozzle at pressures from 100 to 150 psi. In addition, to atomizing the fuel, the small, carefully controlled size of the nozzle exit orifice serves to control the burner firing rate. Burners of this type are currently available at firing rates of more than 0.5 gallons-per-hour (70,000 Btu/hr). Nozzles have been made for lower firing rates, but experience has shown that such nozzles suffer rapid fouling of the necessarily small passages, leading to bad spray patterns and poor combustion performance. Also, traditionally burners and the nozzles are oversized to exceed the maximum demand. Typically, this is figured as follows. The heating load of the house on the coldest day for the location is considered to define the maximum heat load. The contractor or installer adds to this to provide a safety margin and for future expansion of the house. If the unit is a boiler that provides domestic hot water through the use of a tankless heating coil, the burner capacity is further increased. On the contrary, for a majority of the time, the heating system is satisfying a much smaller load, as only rarely do all these demands add up. Consequently, the average output of the heating system has to be much less than the design capacity and this is accomplished by start and stop cycling operation of the system so that the time-averaged output equals the demand. However, this has been demonstrated to lead to overall efficiencies lower than the steady-state efficiency. Therefore, the two main reasons for the current practice of using oil burners much larger than necessary for space heating are the unavailability of reliable low firing rate oil burners and the desire to assure adequate input rate for short duration, high draw domestic hot water loads. One approach to solve this problem is to develop a burner, which can operate at two firing rates, with the lower rate being significantly lower than 0.5 gallons per hour. This paper describes the initial results of adopting this approach through a pulsed flow nozzle. It has been shown that the concept of flow modulation with a small solenoid valve is feasible. Especially in the second configuration tested, where the Lee valve was integrated with the nozzle, reasonable modulation in flow of the order of 1.7 could be achieved. For this first prototype, the combustion performance is still not quite satisfactory. Improvements in operation, for example by providing a sharp and positive shut-off so that there is no flow under low pressures with consequent poor atomization could lead to better combustion performance. This could be achieved by using nozzles that have shut off or check valves for example. It is recommended that more work in cooperation with the valve manufacturer could produce a technically viable system. Marketability is of course a far more complex problem to be addressed once a technically viable product is available.

KRISHNA,C.R.; BUTCHER,T.A.; KAMATH,B.R.

2004-10-01T23:59:59.000Z

138

Ammonia-Free NOx Control System  

SciTech Connect (OSTI)

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the January 1 to March 31, 2004 time period.

S. Wu; Z. Fan; R. Herman

2004-03-31T23:59:59.000Z

139

Ammonia-Free NOx Control System  

SciTech Connect (OSTI)

Research is being conducted under United States Department of Energy (DOE) Contract DEFC26-03NT41865 to develop a new technology to achieve very low levels of NOx emissions from pulverized coal fired boiler systems by employing a novel system level integration between the PC combustion process and the catalytic NOx reduction with CO present in the combustion flue gas. The combustor design and operating conditions will be optimized to achieve atypical flue gas conditions. This approach will not only suppress NOx generation during combustion but also further reduce NOx over a downstream catalytic reactor that does not require addition of an external reductant, such as ammonia. This report describes the work performed during the October 1 to December 31, 2003 time period.

S. Wu

2003-12-31T23:59:59.000Z

140

A Return Stroke NOx Production Model  

Science Journals Connector (OSTI)

A model is introduced for estimating the nitrogen oxides (NOx = NO + NO2) production from a lightning return stroke channel. A realistic Modified Transmission Line Model return stroke current is assumed to propagate vertically upward along a ...

William J. Koshak; Richard J. Solakiewicz; Harold S. Peterson

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Electrochemical NOx Sensors for Monitoring Diesel Emissions  

Broader source: Energy.gov [DOE]

A unique electrochemical sensing strategy correlating the level of NOx with an impedance-based signal shows promise for sensitivity, stability, and accuracy while incorporating single-cell structures and simple electronics into low-cost designs

142

METHANE de-NOX FOR UTILITY PC BOILERS  

SciTech Connect (OSTI)

During the current quarter, pilot scale testing was continued with the modified combustor and modified channel burner using the new PRB coal delivered in late December. Testing included benchmark testing to determine whether the system performance was comparable to that with the previous batch of PRB coal, baseline testing to characterize performance of the PC Burner without coal preheating, and parametric testing to evaluate the effect of various preheat combustor and PC burner operating variables, including reduced gas usage in the preheat combustor. A second version of the PC burner in which the secondary air channels were closed and replaced with six air nozzles was then tested with PRB coal. Plans were developed with RPI for the next phase of testing at the 100 million Btu/h scale using RPI's Coal Burner Test Facility (CBTF). A cost estimate for preparation of the CBTF and preheat burner system design, installation and testing was then prepared by RPI.

Joseph Rabovitser; Bruce Bryan; Serguei Nester; Stan Wohadlo

2003-04-01T23:59:59.000Z

143

Development of a Low NOx Burner System for Coal Fired Power Plants Using Coal and Biomass Blends  

E-Print Network [OSTI]

.................................................................................... 36 Figure 19 Result of Combustion Performance Tests after Retrofits of Thermal Power Plant IN in Finland Consisting of Four 265 MW Pulverized Coal-Fired Boilers... on to include the International Energy Agency Bioenergy Task 32 group?s draft position paper that indicates cofiring represents among the lowest risk, least expensive, most efficient, and shortest term options for renewable-based electrical power generation...

Gomez, Patsky O.

2010-01-16T23:59:59.000Z

144

Evaluation of Gas Reburning and Low-NOx Burners on a Wall-Fired Boiler; a DOE Assessment  

SciTech Connect (OSTI)

The results from the GR-LNB technology demonstrated by EER at Cherokee Station approached, but did not meet, the CCT project's performance objectives. Acceptable unit operability was achieved with both the GR and the LNB components. The gas reburning component of the process appears to be broadly applicable for retrofit NO{sub x} control to most utility boilers and, in particular, to wet-bottom cyclone boilers, which are high NO{sub x} emitters and are difficult to control (LNB technology is not applicable to cyclone boilers). GR-LNB can reduce NO{sub x} to mandated emissions levels under Title IV of the CAAA without significant, adverse boiler impacts. The GR-LNB process may be applicable to boilers significantly larger than the demonstration unit, provided there is adequate dispersion and mixing of injected natural gas. Major results of the demonstration project are summarized as follows: NO{sub x}-emissions reductions averaging 64% were achieved with 12.5% gas heat input in long-term tests on a 158-MWe (net) wall-fired unit. The target reduction level of 70% was achieved only on a short-term basis with higher gas consumption. The thermal performance of coal-fired boilers is not significantly affected by GR-LNB. Convective section steam temperatures can be controlled within acceptable limits. Thermal efficiency is decreased by a small amount (about 0.8%), because of increased dry gas loss and higher moisture in the flue gas as a result of the GR process. Furnace slagging and convective section fouling can be adequately controlled. Because of the higher hydrogen/carbon (H/C) ratio of natural gas compared with coal, use of the GR process results in a modest reduction in CO{sub 2} emissions. SO{sub 2} and particulate emissions are reduced in direct proportion to the fraction of heat supplied by natural gas.

National Energy Technology Laboratory

2001-02-28T23:59:59.000Z

145

Development of a Methane Premixed Catalytic Burner for Household Applications  

Science Journals Connector (OSTI)

The catalytic combustion of methane is currently investigated in a variety of international research programs, thanks to its numerous potential applications (e.g., boilers, process heaters, reciprocating engines, gas-turbine cycles, etc.). ... At low surface heat powers (Q) and excesses of air (Ea), the combustion mostly occurs in a thin layer within the permeable panel (radiant or flameless regime, Figure 1b); the burner outlet surface (burner deck) reaches temperatures varying from 700 to 900 °C, depending on both Q and Ea values, and glows flamelessly. ... The goal is to assemble a boiler capable of coping with variable hot water requests:? from about 2?3 kW (160?240 kW/m2) for apartment heating up to 25 kW (2000 kW/m2) for sanitary purposes, so as to produce hot water with time delays compatible with the users' comfort. ...

Isotta Cerri; Guido Saracco; Francesco Geobaldo; Vito Specchia

2000-01-04T23:59:59.000Z

146

NUMERICAL SIMULATION OF NATURAL GAS-SWIRL BURNER  

SciTech Connect (OSTI)

A numerical simulation of a turbulent natural gas jet diffusion flame at a Reynolds number of 9000 in a swirling air stream is presented. The numerical computations were carried out using the commercially available software package CFDRC. The instantaneous chemistry model was used as the reaction model. The thermal, composition, flow (velocity), as well as stream function fields for both the baseline and air-swirling flames were numerically simulated in the near-burner region, where most of the mixing and reactions occur. The results were useful to interpret the effects of swirl in enhancing the mixing rates in the combustion zone as well as in stabilizing the flame. The results showed the generation of two recirculating regimes induced by the swirling air stream, which account for such effects. The present investigation will be used as a benchmark study of swirl flow combustion analysis as a step in developing an enhanced swirl-cascade burner technology.

Ala Qubbaj

2005-03-01T23:59:59.000Z

147

Downhole burner systems and methods for heating subsurface formations  

DOE Patents [OSTI]

A gas burner assembly for heating a subsurface formation includes an oxidant conduit, a fuel conduit, and a plurality of oxidizers coupled to the oxidant conduit. At least one of the oxidizers includes a mix chamber for mixing fuel from the fuel conduit with oxidant from the oxidant conduit, an igniter, and a shield. The shield includes a plurality of openings in communication with the oxidant conduit. At least one flame stabilizer is coupled to the shield.

Farmayan, Walter Farman (Houston, TX); Giles, Steven Paul (Damon, TX); Brignac, Jr., Joseph Phillip (Katy, TX); Munshi, Abdul Wahid (Houston, TX); Abbasi, Faraz (Sugarland, TX); Clomburg, Lloyd Anthony (Houston, TX); Anderson, Karl Gregory (Missouri City, TX); Tsai, Kuochen (Katy, TX); Siddoway, Mark Alan (Katy, TX)

2011-05-31T23:59:59.000Z

148

Trends in Ln(III) Sorption to Quartz Assessed by Molecular Dynamics...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ln(III) Sorption to Quartz Assessed by Molecular Dynamics Simulations and Laser Induced Flourescence Studies. Trends in Ln(III) Sorption to Quartz Assessed by Molecular Dynamics...

149

NETL: Investigation on Flame Characteristics and Burner Operability Issues  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Investigation on Flame Characteristics and Burner Operability Issues of Oxy-Fuel Combustion Investigation on Flame Characteristics and Burner Operability Issues of Oxy-Fuel Combustion Project No.: DE-FE0002402 NETL has partnered with the University of Texas at El Paso (UTEP) to investigate the characteristics of oxy-fuel flames and assess their impact on the operability of oxy-fuel combustion systems. The examination of fundamental flame characteristics data and related burner operability parameters are essential for designing and developing oxy-fuel combustion systems for new power plants and retrofitting existing power generation units. In an oxy-fuel system, coal is combusted in an enriched oxygen environment using pure oxygen diluted with recycled CO2 or water vapor (H2O), resulting in a flue stream consisting only of CO2 and H2O (no other co-contaminants) (Figure 1). Oxy-fuel combustion is promising for CCUS applications because water can be condensed out of the CO2/H2O flue stream to produce a relatively pure CO2 end product for capture. Oxy-fuel combustion and subsequent CO2 capture is currently being considered by the DOE's Innovations for Existing Plants Program as having the potential to meet the goal of 90 percent CO2 capture without increasing the cost of electricity more than 35 percent.

150

E-Print Network 3.0 - actinide burner reactors Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Design 85 (2010) 14881491 Contents lists available at ScienceDirect Summary: subcritical advanced burner reactor, Nuclear technology 162 (2008). 9 M. Kotschenreuther,...

151

E-Print Network 3.0 - advanced burner test Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

POWER Vol. 21, No. 1, JanuaryFebruary 2005 Summary: each test sequence. IV. Blowout Phenomenology A. Piloted Burner In this section, we describe... attachment to nonattachment at...

152

Ammonia Sensor for SCR NOX Reduction | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Sensor for SCR NOX Reduction Ammonia Sensor for SCR NOX Reduction Presentation given at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 August,...

153

Lean NOx Reduction with Dual Layer LNT/SCR Catalysts  

Broader source: Energy.gov [DOE]

Results show that a series of dual layer catalysts with a bottom layer of LNT catalyst and a top layer of SCR catalyst can carry out coupled ammonia generation and NOx reduction, achieving high NOx conversion with minimal ammonia slip

154

Emission reduction of NOx and CO by optimization of the automatic control system in a coal-fired stoker boiler  

SciTech Connect (OSTI)

To date research on NO, and CO emission reduction in stoker-fired boilers has been devoted to combustion modification to the overfire air, diverting air to a selected set of burners, using modified low-NOx, burners, using flue gas recirculation or flue gas treatment with specially controlled catalyst and additives. This study introduces a concept that focuses on the dynamics of the boiler and the automatic control system. The objective of this study was to reduce the NO and CO emissions by restructuring the automatic control system and then tuning the control system with parameters that have been optimized with emission reduction as the objective. Dynamic data were obtained from a step-input test of either the underfire air or the overfire air. These data were used to model the boiler with a transfer function describing the emissions. The analyzer dynamic response was included in the overall model. The control parameters were determined from this overall emissions transfer function by mathematical optimization. These control parameters constituted the initial values in the automatic control system used for the final tests in the boiler. Additional adjustments to reduce the emissions were carried out during boiler operation. A low controller gain and a fast reset time were found to be the most suitable setting for the control system. The NO emissions controlled by the overfire air and CO emissions controlled by the underfire air produced the best results.

Schnelle, K.B.; Laungphairojana, A.; Debelak, K.A. [Vanderbilt University, Nashville, TN (United States). Dept. of Chemical Engineering

2006-07-15T23:59:59.000Z

155

Making a Low-Cost Soda Can Ethanol Burner for Out-of-Laboratory Flame Test Demonstrations and Experiments  

Science Journals Connector (OSTI)

Making a Low-Cost Soda Can Ethanol Burner for Out-of-Laboratory Flame Test Demonstrations and Experiments ... Video clips for the three flame tests shown in Figure 3, and for turning the burner on and off. ...

Henson L. Lee Yu; Perfecto N. Domingo, Jr.; Elliard Roswell S. Yanza; Armando M. Guidote, Jr.

2014-10-13T23:59:59.000Z

156

Slurry burner for mixture of carbonaceous material and water  

DOE Patents [OSTI]

A carbonaceous material-water slurry burner includes a high pressure tip-emulsion atomizer for directing a carbonaceous material-water slurry into a combustion chamber for burning therein without requiring a support fuel or oxygen enrichment of the combustion air. Introduction of the carbonaceous material-water slurry under pressure forces it through a fixed atomizer wherein the slurry is reduced to small droplets by mixing with an atomizing air flow and directed into the combustion chamber. The atomizer includes a swirler located immediately adjacent to where the fuel slurry is introduced into the combustion chamber and which has a single center channel through which the carbonaceous material-water slurry flows into a plurality of diverging channels continuous with the center channel from which the slurry exits the swirler immediately adjacent to an aperture in the combustion chamber. The swirler includes a plurality of slots around its periphery extending the length thereof through which the atomizing air flows and by means of which the atomizing air is deflected so as to exert a maximum shear force upon the carbonaceous material-water slurry as it exits the swirler and enters the combustion chamber. A circulating coolant system or boiler feed water is provided around the periphery of the burner along the length thereof to regulate burner operating temperature, eliminate atomizer plugging, and inhibit the generation of sparklers, thus increasing combustion efficiency. A secondary air source directs heated air into the combustion chamber to promote recirculation of the hot combustion gases within the combustion chamber.

Nodd, Dennis G. (West Mifflin, PA); Walker, Richard J. (Bethel Park, PA)

1987-01-01T23:59:59.000Z

157

Real Time Flame Monitoring of Gasifier Burner and Injectors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Real Time Flame Monitoring of Gasifier Real Time Flame Monitoring of Gasifier Burner and Injectors Background The Gasification Technologies Program at the National Energy Technology Laboratory (NETL) supports research and development (R&D) in the area of gasification-a process whereby carbon-based materials (feedstocks) such as coal are converted into synthesis gas (syngas), which is separated into hydrogen (H 2 ) and carbon dioxide (CO 2 ) gas streams in a combustion turbine-generator as a way to generate clean electricity while

158

REAL TIME FLAME MONITORING OF GASIFIER BURNER AND INJECTORS  

SciTech Connect (OSTI)

This report is submitted to the United States Department of Energy in partial fulfillment of the contractual requirements for Phase I of the project titled, ''Real Time Flame Monitoring of Gasifier Burner and Injectors'', under co-operative agreement number DE-FS26-02NT41585. The project is composed of three one-year budget periods. The work in each year is divided into separate Tasks to facilitate project management, orderly completion of all project objectives, budget control, and critical path application of personnel and equipment. This Topical Report presents results of the Task 1 and 2 work. The 2 D optical sensor was developed to monitor selected UV and visible wavelengths to collect accurate flame characterization information regarding mixing, flame shape, and flame rich/lean characteristic. Flame richness, for example, was determined using OH and CH intensity peaks in the 300 to 500 nanometer range of the UV and visible spectrum. The laboratory burner was operated over a wide range of air to fuel ratio conditions from fuel rich to fuel lean. The sooty oxygen enriched air flames were established to test the sensor ability to characterize flame structures with substantial presence of hot solid particles emitting strong ''black body radiation''. The knowledge gained in these experiments will be very important when the sensor is used for gasifier flame analyses. It is expected that the sensor when installed on the Global Energy gasifier will be exposed to complex radiation patterns. The measured energy will be a combination of spectra emitted by the combusting gases, hot solid particulates, and hot walls of the gasifier chamber. The ability to separate flame emissions from the ''black body emissions'' will allow the sensor to accurately determine flame location relative to the gasifier walls and the injectors, as well as to analyze the flame's structure and condition. Ultimately, this information should enable the gasification processes to be monitored and controlled and as a result increase durability and efficiency of the gasifier. To accomplish goals set for Task 2 GTI will utilize the CANMET Coal Gasification Research facility. The Entrained Coal Gasifier Burner Test Stand has been designed and is currently under construction in the CANMET Energy Technology Center (CETC), the research and technology arm of Natural Resources Canada (NRCan). This Gasifier Burner Stand (GBS) is a scaled-down mock-up of a working gasifier combustion system that can provide the flexible platform needed in the second year of the project to test the flame sensor. The GBS will be capable of simulating combustion and gasification processes occurring in commercial gasifiers, such as Texaco, Shell, and Wabash River.

James Servaites; Serguei Zelepouga; David Rue

2003-10-01T23:59:59.000Z

159

Characterization of syngas laminar flames using the Bunsen burner configuration  

Science Journals Connector (OSTI)

Laminar flame speeds of syngas mixtures (H2/CO/Air) have been studied using the Bunsen flame configuration with both straight and nozzle burners. The flame surface area and flame cone angle methodologies, respectively based on the OH* chemiluminescence and Schlieren imaging techniques, have been performed to extract flame speeds for a wide range of equivalence ratios (0.3 syngas flames with 0.6 < ? < 1.0 and 10% < %H2 < 70% is proposed. A particular attention has been devoted to the development and validation of the OH* chemiluminescence methodology with the identification of important parameters governing the measurement accuracy.

N. Bouvet; C. Chauveau; I. Gökalp; S.-Y. Lee; R.J. Santoro

2011-01-01T23:59:59.000Z

160

Industrial pulverized coal low-NO{sub x} burner. Phase 1, Final report  

SciTech Connect (OSTI)

Arthur D. Little, Inc., jointly with its university partner, the Massachusetts Institute of Technology, and its industrial partner, Hauck Manufacturing Corporation, is developing a low NO{sub x} pulverized coal burner for use in industrial processes, including those which may require preheated air or oxygen enrichment. The design of the burner specifically addresses the critical performance requirements of industrial systems, namely: high heat release rates, short flames, even heat flux distribution, and high combustion efficiency. The design is applicable to furnaces, industrial boilers, and cement kilns. The development program for this burner includes a feasibility analysis, performance modelling, development of the burner prototype design, and assessment of the economic viability of the burner. The Phase 1 activities covered by this report consisted of three principal tasks: preliminary burner design; fluid flow/combustion modelling and analyses; and market evaluation. The preliminary design activities included the selection of a design coal for the Phase 1 design, preliminary design layout, and preliminary sizing of the burner components. Modelling and analysis were conducted for the coal pyrolysis zone, the rich combustion zone and the lean bumout zone. Both chemical kinetics and one-dimensional coal combustion modelling were performed. The market evaluation included a review of existing industrial coal use, identification of potential near- and long-term markets and an assessment of the optimum burner sizes.

Not Available

1993-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Establishing criteria for the design of a combination parallel and cross-flaming covered burner  

E-Print Network [OSTI]

-mm in the crop row and height 7-mm in the left and right furrows. Burners traveled at a designated speed (2, 3.5, or 5 km/h) and burner operating pressure combination (207, 276, or 345 kPa). Time versus temperature curves were generated...

Stark, Christopher Charles

2003-01-01T23:59:59.000Z

162

Oxygen diffusion, surface exchange and oxygen semi-permeation performances of Ln2NiO4+ membranes (Ln = La, Pr and Nd)  

E-Print Network [OSTI]

Oxygen diffusion, surface exchange and oxygen semi-permeation performances of Ln2NiO4+ membranes the rate determining step (rds) in oxygen semi-permeation of dense Ln2NiO4+ membranes (with Ln = La, Pr and Nd), a specific setup has been designed, which allowed measuring the oxygen semi-permeation flux

Paris-Sud XI, Université de

163

Beijing LN Green Power Company | Open Energy Information  

Open Energy Info (EERE)

LN Green Power Company LN Green Power Company Jump to: navigation, search Name Beijing LN Green Power Company Place Beijing, Beijing Municipality, China Zip 100000 Sector Vehicles Product Attempting to transfer their experience in electric vehicles to fuel cells. Coordinates 39.90601°, 116.387909° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.90601,"lon":116.387909,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

164

METHANE DE-NOX FOR UTILITY PC BOILERS  

SciTech Connect (OSTI)

During the current quarter, pilot-scale testing with the modified air nozzle version of the PC burner was completed with PRB coal at the Riley Power Inc. (RPI) test facility. A total of 8 different burner configurations were tested utilizing various burner air nozzle arrangements in place of the burner air channels. It was found that with the arrangements tested, a stable flame could not be maintained at coal feed rates above 100 lb/h. While it is felt that the air nozzle approach can ultimately be used effectively, in the interest of holding to the current project schedule it was decided to proceed with the balance of the project using the air channel design. The pilot-scale PC burner was therefore restored to the air-channel configuration and benchmark testing with PRB coal to confirmed previous operating results. A series of tests was then conducted with PRB and West Virginia caking coal to evaluate modifications to the gas combustor configuration and operation for improved performance with caking coal. Continuous operation was achieved with caking coal up to 50 lb/h vs. the full load target of 150 lb/h. Impingement and deposition of partially devolatilized coal occurred at various points within the combustor when the caking coal feed was increased above 50 lb/h. The 100 MMBtu/h commercial-scale prototype design was started with coal burner design input from both RPI and VTI. Based on typical burner installation layout considerations, it was that the preheat combustor should be oriented horizontally on the axial centerline of the coal burner. Accordingly, work was begun to relocate the pilot gas combustor to this orientation so that the pilot results with caking coal will be directly applicable to the preferred 100 MMBtu design. Inspection and repair of the 100 MMBtu/h Coal Burner Test Facility (CBTF) was initiated by RPI and as of 6/30, this activity was 70% complete.

Bruce Bryan; Joseph Rabovitser; Serguei Nester; Stan Wohadlo

2003-07-30T23:59:59.000Z

165

Process and apparatus for igniting a burner in an inert atmosphere  

DOE Patents [OSTI]

According to this invention there is provided a process and apparatus for the ignition of a pilot burner in an inert atmosphere without substantially contaminating the inert atmosphere. The process includes the steps of providing a controlled amount of combustion air for a predetermined interval of time to the combustor then substantially simultaneously providing a controlled mixture of fuel and air to the pilot burner and to a flame generator. The controlled mixture of fuel and air to the flame generator is then periodically energized to produce a secondary flame. With the secondary flame the controlled mixture of fuel and air to the pilot burner and the combustion air is ignited to produce a pilot burner flame. The pilot burner flame is then used to ignited a mixture of main fuel and combustion air to produce a main burner flame. The main burner flame then is used to ignite a mixture of process derived fuel and combustion air to produce products of combustion for use as an inert gas in a heat treatment process.

Coolidge, Dennis W. (Katy, TX); Rinker, Franklin G. (Perrysburg, OH)

1994-01-01T23:59:59.000Z

166

Pollutant exposures from unvented gas cooking burners: A simulation-based  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Pollutant exposures from unvented gas cooking burners: A simulation-based Pollutant exposures from unvented gas cooking burners: A simulation-based assessment for Southern California Title Pollutant exposures from unvented gas cooking burners: A simulation-based assessment for Southern California Publication Type Journal Article Year of Publication 2013 Authors Logue, Jennifer M., Neil E. Klepeis, Agnes B. Lobscheid, and Brett C. Singer Journal Environmental Health Perspectives Date Published 11/2013 Abstract Background: Residential natural gas cooking burners (NGCBs) can emit substantial quantities of pollutants and they are typically used without venting. Objective: Quantify pollutant concentrations and occupant exposures resulting from NGCB use in California homes. Methods: A mass balance model was applied to estimate time-dependent pollutant concentrations throughout homes and the "exposure concentrations" experienced by individual occupants. The model was applied to estimate nitrogen dioxide (NO2), carbon monoxide (CO), and formaldehyde (HCHO) concentrations for one week each in summer and winter for a representative sample of Southern California homes. The model simulated pollutant emissions from NGCBs, NO2 and CO entry from outdoors, dilution throughout the home, and removal by ventilation and deposition. Residence characteristics and outdoor concentrations of CO and NO2 were obtained from available databases. Ventilation rates, occupancy patterns, and burner use were inferred from household characteristics. Proximity to the burner(s) and the benefits of using venting range hoods were also explored. Replicate model executions using independently generated sets of stochastic variable values yielded estimated pollutant concentration distributions with geometric means varying less than 10%.

167

Real Time Flame Monitoring of Gasifier Burner and Injectors  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

8 8 Gasification Technologies contacts Gary J. stiegel Gasification Technology Manager National Energy Technology Laboratory 626 Cochrans Mill Road P.O. Box 10940 Pittsburgh, PA 15236 412-386-4499 gary.stiegel@netl.doe.gov Jenny tennant Project Manager National Energy Technology Laboratory 3610 Collins Ferry Road P.O. Box 880 Morgantown, WV 26507 304-285-4830 jenny.tennant@netl.doe.gov David Rue Principal Investigator Gas Technology Institute 1700 South Mount Prospect Road Des Plaines, IL 60018 847-768-0508 david.rue@gastechnology.org Real Time Flame moniToRing oF gasiFieR BuRneR and injecToRs Description Combustion scientists and engineers have studied radiant emissions of various flames for many years. For some time, technologists have understood the rich potential for

168

Lower Freezing DEF For Higher NOx Reduction Attainment  

Broader source: Energy.gov [DOE]

NOx emissions data from bench-scale experiments and Class III truck operated using a low freezing point diesel exhaust fluid

169

Cummins/ORNL-FEERC CRADA: NOx Control & Measurement Technology...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

CumminsORNL-FEERC CRADA: NOx Control & Measurement Technology for Heavy-Duty Diesel Engines Vehicle Technologies Office Merit Review 2014: Cummins-ORNLFEERC Emissions CRADA:...

170

Unique Catalyst System for NOx Reduction in Diesel Exhaust |...  

Broader source: Energy.gov (indexed) [DOE]

More Documents & Publications Noxtechs PAC System Development and Demonstration Plasma Assisted Catalysis System for NOx Reduction Clean Diesel Engine Component Improvement...

171

Two Catalyst Formulations - One Solution for NOx After-treatment...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Two Catalyst Formulations - One Solution for NOx After-treatment Systems Low-temperature SCR combined with standard high-temperature SCR catalyst formulation in one system provides...

172

Measurement and Characterization of Lean NOx Adsorber Regeneration...  

Broader source: Energy.gov (indexed) [DOE]

for the Department of Energy Purpose of Work: Enable efficient lean engine market penetration by meeting emission regulations with aftertreatment * Research of Lean NOx...

173

Enhanced High and Low Temperature Performance of NOx Reduction...  

Broader source: Energy.gov (indexed) [DOE]

and Low Temperature Performance of NOx Reduction Materials 2013 DOE AMR Review This presentation does not contain any proprietary, confidential, or otherwise restricted...

174

NOx Adsorbers for Heavy Duty Truck Engines - Testing and Simulation...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Adsorbers for Heavy Duty Truck Engines - Testing and Simulation NOx Adsorbers for Heavy Duty Truck Engines - Testing and Simulation This report provides the results of an...

175

H2-Assisted NOx Traps: Test Cell Results Vehicle Installations  

Broader source: Energy.gov (indexed) [DOE]

Sam Crane August 28, 2003 H 2 -Assisted NOx Traps: Test Cell Results Vehicle Installations 2 Project Objectives * Determine Advantages of H 2 Assisted NO x Trap Regeneration *...

176

Investigation of Aging Mechanisms in Lean NOx Traps | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

"Mega" Merit Review 2008 on February 25, 2008 in Bethesda, Maryland. merit08johnson.pdf More Documents & Publications Investigation of Aging Mechanisms in Lean NOx Traps...

177

Fuel Processor Enabled NOx Adsorber Aftertreatment System for...  

Broader source: Energy.gov (indexed) [DOE]

for Diesel Engine Emissions Control R. Dalla Betta, D. Sheridan, J. Cizeron Catalytica Energy Systems Inc. Mountain View, California 2 Outline Why use a fuel processor for NOx...

178

Status of APBF-DEC NOx Adsorber/DPF Projects  

Broader source: Energy.gov (indexed) [DOE]

* Examine other fuel properties 6 OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY Each platform will determine effects of fuel properties on: * NOx and PM reduction...

179

Virtual Oxygen Sensor for Innovative NOx and PM Emission Control...  

Broader source: Energy.gov (indexed) [DOE]

2009 - Poster Session August 3 rd , Hyatt Regency Dearborn Hotel Virtual Oxygen Sensor Innovative NOx and PM Emission Control Technologies J. Seebode, E. Stlting,...

180

Three-Dimensional Composite Nanostructures for Lean NOx Emission...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Emission Control Catalysts Three-Dimensional Composite Nanostructures for Lean NOx Emission Control Ultra-efficient, Robust and Well-defined Nano-Array based Monolithic Catalysts...

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Three-Dimensional Composite Nanostructures for Lean NOx Emission...  

Broader source: Energy.gov (indexed) [DOE]

Nanowire Lean NOx Emission Control Catalysts Ultra-efficient, Robust and Well-defined Nano-Array based Monolithic Catalysts Three-Dimensional Composite Nanostructures for Lean...

182

Passive Catalytic Approach to Low Temperature NOx Emission Abatement  

Broader source: Energy.gov [DOE]

Numerically evaluated and optimized proposed state-of-the-art passive catalytic technology designed to reduce NOx released during vehicle cold start portion of the FTP-75 cycle

183

Rapid Aging Protocols for Diesel Aftertreatment Devices: NOx...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Aftertreatment (Agreement 13415) Thermal Deactivation Mechanisms of Fully-Formed Lean NOx Trap Catalysts Aged by LeanRich Cycling Impacts of Biodiesel on Emission Control Devices...

184

NOxControl revised.p65  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

OCTOBER 2001 OCTOBER 2001 DOE/FE-0442 EVALUATION OF GAS REBURNING AND LOW-NO X BURNERS ON A WALL-FIRED BOILER ENERGY AND ENVIRONMENTAL RESEARCH CORPORATION Disclaimer This report was prepared using publicly available information, including the Final Technical Report and other reports prepared pursuant to a cooperative agreement partially funded by the U.S. Department of Energy. Neither the United States Government nor any agency, employee, contractor, or representative thereof, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe upon privately owned rights. Reference herein to any specific commercial

185

A Small Scale Solar Agricultural Dryer with Biomass Burner and Heat Storage Back-Up Heater  

Science Journals Connector (OSTI)

This paper describes a small scale solar agricultural dryer with a simple biomass burner and heat storage back-up heater. The key design features ... are the combination of direct and indirect type solar dryer, t...

Elieser Tarigan; Perapong Tekasakul

2009-01-01T23:59:59.000Z

186

Characterization of a gas burner to simulate a propellant flame and evaluate aluminum particle combustion  

SciTech Connect (OSTI)

This study details the characterization and implementation of a burner designed to simulate solid propellant fires. The burner was designed with the ability to introduce particles (particularly aluminum) into a gas flame. The aluminized flame conditions produced by this burner are characterized based on temperature and heat flux measurements. Using these results, flame conditions are quantified in comparison to other well-characterized reactions including hydrocarbon and propellant fires. The aluminized flame is also used to measure the burning rate of the particles. This work describes the application of this burner for re-creating small-scale propellant flame conditions and as a test platform for experiments that contribute to the development of a particle combustion model, particularly in propellant fires. (author)

Jackson, Matt [Engineering Department, West Texas A and M University, Canyon, TX 79016 (United States); Pantoya, Michelle L. [Mechanical Engineering Department, Texas Tech University, Lubbock, TX 79409 (United States); Gill, Walt [Sandia National Laboratories, Albuquerque, NM 87185 (United States)

2008-04-15T23:59:59.000Z

187

Optimization of Gas Nozzles Geometry in Dual-Fuel Burners of Power Stations  

Science Journals Connector (OSTI)

Thermal power required by boilers in steam power stations is supplied through gas or heavy oil fueled burners. Incorrect functioning ... in the boilers of Shazand 325 MW power station in Arak. Gas-fueled nozzles ...

Ebrahim Moussavi Torshizi…

2008-08-01T23:59:59.000Z

188

Variable firing rate power burner for high efficiency gas furnaces. Final report  

SciTech Connect (OSTI)

One method for increasing the efficiency of residential furnaces and boilers is to retrofit a burner capable of firing rate (FR) modulation. While maximum FR is still attainable, the average FR is significantly lower, resulting in more effective heat exchanger performance. Equally important is the capability for continuous firing at a very low rate (simmering) which eliminates off-cycle loss, a heavy contributor to inefficiency. Additional performance can be gained by reducing the excess air required by a burner. Based on its previous experience, Foster-Miller Associates, Inc. has designed and tested a low excess air (about 15%) variable firing rate (VFR) burner. The theory of operation and the construction of the test burner are described. Test results are given along with a conclusion/recommendation. A Phase II plan is outlined which suggests methods and steps for fabrication and field testing of a number of prototype units.

Fuller, H.H.; Demler, R.L.; Poulin, E.

1980-02-01T23:59:59.000Z

189

Refractory products and ramming bodies for high pressure burners of steam boilers  

Science Journals Connector (OSTI)

Silicon carbide rammed bodies are suitable for lining the combustion zones of high-pressure cyclone burners of steam boilers. The life of the silicon carbide body depends on the heat resistance of the supporti...

N. I. Voronin; N. I. Krasotkina; A. I. kulik; T. S. Karmanova; G. E. Levin…

190

Transient Dynamometer Testing of a Single-Leg NOX Adsorber Combined...  

Broader source: Energy.gov (indexed) [DOE]

Transient Dynamometer Testing of a Single-Leg NOX Adsorber Combined with a Fuel Processor for Enhanced NOx Control Transient Dynamometer Testing of a Single-Leg NOX Adsorber...

191

Fuel Consumption and NOx Trade-offs on a Port-Fuel-Injected SI...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Consumption and NOx Trade-offs on a Port-Fuel-Injected SI Gasoline Engine Equipped with a Lean-NOx Trap Fuel Consumption and NOx Trade-offs on a Port-Fuel-Injected SI Gasoline...

192

3D Matrix Burners: A Method for Small-Scale Syngas Production  

Science Journals Connector (OSTI)

3D Matrix Burners: A Method for Small-Scale Syngas Production ... After passing the mixer, a homogeneous fuel–oxidizer mixture of specified composition is fed through permeable walls and bottom of the 3D matrix burner into its inner cavity, where it burns near the surface. ... However, as is well-known from methane combustion studies,(12) the normal burning velocity decreases with increasing pressure, for both rich and lean methane–air mixtures. ...

Vladimir S. Arutyunov; Vladimir M. Shmelev; Ayan N. Rakhmetov; Oksana V. Shapovalova

2013-11-18T23:59:59.000Z

193

Flexible CHP System with Low NOx, CO, and VOC Emissions - Presentation...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

CHP System with Low NOx, CO, and VOC Emissions - Presentation by the Gas Technology Institute (GTI), June 2011 Flexible CHP System with Low NOx, CO, and VOC Emissions -...

194

Low-NOx Gas Turbine Injectors Utilizing Hydrogen-Rich Opportunity...  

Broader source: Energy.gov (indexed) [DOE]

NOx Gas Turbine Injectors Utilizing Hydrogen-Rich Opportunity Fuels - Fact Sheet, 2011 Low-NOx Gas Turbine Injectors Utilizing Hydrogen-Rich Opportunity Fuels - Fact Sheet, 2011...

195

Ultra-Low NOx Advanced Vortex Combustor  

SciTech Connect (OSTI)

An ultra lean-premixed Advanced Vortex Combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory (USDOE NETL) test facility in Morgantown (WV). All testing was performed at elevated pressures and inlet temperatures and at lean fuel-air ratios representative of industrial gas turbines. The improved AVC design exhibited simultaneous NOx/CO/UHC emissions of 4/4/0 ppmv (all emissions are at 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated tremendous acoustic dynamic stability over a wide range of operating conditions which potentially makes this approach significantly more attractive than other lean premixed combustion approaches. In addition, a pressure drop of 1.75% was measured which is significantly lower than conventional gas turbine combustors. Potentially, this lower pressure drop characteristic of the AVC concept translates into overall gas turbine cycle efficiency improvements of up to one full percentage point. The relatively high velocities and low pressure drops achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

Edmonds, R.G. (Ramgen Power Systems, Inc., Bellevue, WA); Steele, R.C. (Ramgen Power Systems, Inc., Bellevue, WA); Williams, J.T. (Ramgen Power Systems, Inc., Bellevue, WA); Straub, D.L.; Casleton, K.H.; Bining, Avtar (California Energy Commission, Sacramento, CA)

2006-05-01T23:59:59.000Z

196

ULTRA-LOW NOX ADVANCED VORTEX COMBUSTOR  

SciTech Connect (OSTI)

An ultra lean-premixed Advanced Vortex Combustor (AVC) has been developed and tested. The natural gas fueled AVC was tested at the U.S. Department of Energy’s National Energy Technology Laboratory (USDOE NETL) test facility in Morgantown (WV). All testing was performed at elevated pressures and inlet temperatures and at lean fuel-air ratios representative of industrial gas turbines. The improved AVC design exhibited simultaneous NOx/CO/UHC emissions of 4/4/0 ppmv (all emissions are at 15% O2 dry). The design also achieved less than 3 ppmv NOx with combustion efficiencies in excess of 99.5%. The design demonstrated tremendous acoustic dynamic stability over a wide range of operating conditions which potentially makes this approach significantly more attractive than other lean premixed combustion approaches. In addition, a pressure drop of 1.75% was measured which is significantly lower than conventional gas turbine combustors. Potentially, this lower pressure drop characteristic of the AVC concept translates into overall gas turbine cycle efficiency improvements of up to one full percentage point. The relatively high velocities and low pressure drops achievable with this technology make the AVC approach an attractive alternative for syngas fuel applications.

Ryan G. Edmonds; Robert C. Steele; Joseph T. Williams; Douglas L. Straub; Kent H. Casleton; Avtar Bining

2006-05-01T23:59:59.000Z

197

Air Pollution Control Regulations: No. 41 - Nox Budget Trading Program  

Broader source: Energy.gov (indexed) [DOE]

41 - Nox Budget Trading 41 - Nox Budget Trading Program (Rhode Island) Air Pollution Control Regulations: No. 41 - Nox Budget Trading Program (Rhode Island) < Back Eligibility Commercial Industrial Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Program Info State Rhode Island Program Type Environmental Regulations Provider Department of Environmental Management These regulations establish a budget trading program for nitrogen oxide emissions, setting NOx budget units for generators and an NOx Allowance Tracking System to account for emissions. These regulations apply to units that serve generators with a nameplate capacity greater than 15 MWe and sell any amount of electricity, as well as to units that have a maximum

198

Development, Application and Performance of Venturi Register L. E. A. Burner System for Firing Oil and Gas Fuels  

E-Print Network [OSTI]

DEVELOPMENT, APPLICATION AND PERFORMANCE OF VENTURI REGISTER L. E. A. BURNER SYSTEM FOR FIRING OIL AND GAS FUELS A. D. Cawte CEA Combustion, Inc. Stamford, Connecticut INTRODUCTION The effect of reducing excess air as a means of curtailing..., extensive investigation work was undertaken us ing the water analog model techniques developed by Associated British Combustion for burner design. The development work resulted in the burner design known today as the Venturi Register, LEA (low excess air...

Cawte, A. D.

1979-01-01T23:59:59.000Z

199

MINIMIZATION OF NO EMISSIONS FROM MULTI-BURNER COAL-FIRED BOILERS  

SciTech Connect (OSTI)

The focus of this program is to provide insight into the formation and minimization of NO{sub x} in multi-burner arrays, such as those that would be found in a typical utility boiler. Most detailed studies are performed in single-burner test facilities, and may not capture significant burner-to-burner interactions that could influence NO{sub x} emissions. Thus, investigations of such interactions were made by performing a combination of single and multiple burner experiments in a pilot-scale coal-fired test facility at the University of Utah, and by the use of computational combustion simulations to evaluate full-scale utility boilers. In addition, fundamental studies on nitrogen release from coal were performed to develop greater understanding of the physical processes that control NO formation in pulverized coal flames--particularly under low NO{sub x} conditions. A CO/H{sub 2}/O{sub 2}/N{sub 2} flame was operated under fuel-rich conditions in a flat flame reactor to provide a high temperature, oxygen-free post-flame environment to study secondary reactions of coal volatiles. Effects of temperature, residence time and coal rank on nitrogen evolution and soot formation were examined. Elemental compositions of the char, tar and soot were determined by elemental analysis, gas species distributions were determined using FTIR, and the chemical structure of the tar and soot was analyzed by solid-state {sup 13}C NMR spectroscopy. A laminar flow drop tube furnace was used to study char nitrogen conversion to NO. The experimental evidence and simulation results indicated that some of the nitrogen present in the char is converted to nitric oxide after direct attack of oxygen on the particle, while another portion of the nitrogen, present in more labile functionalities, is released as HCN and further reacts in the bulk gas. The reaction of HCN with NO in the bulk gas has a strong influence on the overall conversion of char-nitrogen to nitric oxide; therefore, any model that aims to predict the conversion of char-nitrogen to nitric oxide should allow for the conversion of char-nitrogen to HCN. The extent of the HCN conversion to NO or N{sub 2} will depend on the composition of the atmosphere surrounding the particle. A pilot-scale testing campaign was carried out to evaluate the impact of multiburner firing on NO{sub x} emissions using a three-burner vertical array. In general, the results indicated that multiburner firing yielded higher NO{sub x} emissions than single burner firing at the same fuel rate and excess air. Mismatched burner operation, due to increases in the firing rate of the middle burner, generally demonstrated an increase in NO{sub x} over uniform firing. Biased firing, operating the middle burner fuel rich with the upper and lower burners fuel lean, demonstrated an overall reduction in NO{sub x} emissions; particularly when the middle burner was operated highly fuel rich. Computational modeling indicated that operating the three burner array with the center burner swirl in a direction opposite to the other two resulted in a slight reduction in NO{sub x}.

E.G. Eddings; A. Molina; D.W. Pershing; A.F. Sarofim; T.H. Fletcher; H. Zhang; K.A. Davis; M. Denison; H. Shim

2002-01-01T23:59:59.000Z

200

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program through the eleventh quarter, October-December 2002, in the following task areas: Task 1 - Oxygen Enhanced Combustion, Task 2 - Oxygen Transport Membranes, Task 3 - Economic Evaluation and Task 4 - Program Management. The program is proceeding in accordance with the objectives for the third year. Pilot scale experiments conducted at the University of Utah were aimed at confirming the importance of oxygen injection strategy for different types of burners. CFD modeling at REI was used to better understand the potential for increased corrosion under oxygen enhanced combustion conditions. Data from a full-scale demonstration test in Springfield, MO were analyzed. OTM element development continued with preliminary investigation of an alternative method of fabrication of PSO1d elements. OTM process development continued with long-term testing of a PSO1d element. Economic evaluation has confirmed the advantage of oxygen-enhanced combustion. Proposals have been submitted for two additional beta test sites. A first commercial proposal has been submitted. Economic analysis of a beta site test performance was conducted.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2003-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program through the fourth quarter January-March 2001 in the following task areas: Task 1 - Oxygen Enhanced Combustion, Task 2 - Oxygen Transport Membranes and Task 4 - Program Management. This report will also recap the results of the past year. The program is proceeding in accordance with the objectives for the first year. OTM material characterization was completed. 100% of commercial target flux was demonstrated with OTM disks. The design and assembly of Praxair's single tube high-pressure test facility was completed. The production of oxygen with a purity of better than 99.5% was demonstrated. Coal combustion testing was conducted at the University of Arizona. Modest oxygen enhancement resulted in NOx emissions reduction. The injector for oxygen enhanced coal based reburning was conducted at Praxair. Combustion modeling with Keystone boiler was completed. Pilot-scale combustion test furnace simulations continued this quarter.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2001-04-01T23:59:59.000Z

202

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program through the thirteenth quarter, April-June 2003, in the following task areas: Task 1--Oxygen Enhanced Combustion, Task 3--Economic Evaluation and Task 4--Program Management. The program is proceeding in accordance with project objectives. REI's model was modified to evaluate mixing issues in the upper furnace of a staged unit. Analysis of the results, and their potential application to this unit is ongoing. Economic evaluation continues to confirm the advantage of oxygen-enhanced combustion. A contract for a commercial demonstration has been signed with the Northeast Generation Services Company to supply oxygen and license the oxygen enhanced low NOx combustor technology for use at the 147-megawatt coal fired Mt. Tom Station in Holyoke, MA. Commercial proposals have been submitted. Economic analysis of a beta site test performance was conducted.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2003-08-01T23:59:59.000Z

203

Microscopic characteristics of solid particles in opposed multi-burner gasifier  

Science Journals Connector (OSTI)

Abstract The microscopic characteristics of solid particles have important influence on the formation of fluid slag, coarse slag and fine slag during entrained-flow gasification process. Based on the bench-scale opposed multi-burner (OMB) gasifier, solid particles were sampled at different axial distances along the gasifier chamber under typical operating conditions (oxygen and carbon atomic ratio at 1.0). The microscopic characteristics of solid particles were studied by using N2 adsorption-desorption and scanning electron microscopy (SEM) methods. The results show that the solid particles are comprised mainly of porous irregular particle and spherical particle, and few solid particles generated at burner plane perform as dense irregular and hollow shape. As the gasification reaction proceeds along the axis of gasifier, the surface structure of particles becomes rougher, and the pore structure increases. The isotherms of particle samples are all type II, and the particle samples consist of continuous and complete system of pores. The hysteresis loops are H3-type, and there are a large amount of fractured pores. BET surface area and pore volume increase with increasing distance from the burner plane, and average pore diameter gradually reduces, and larger changes occur in the vicinity of the burner plane. The mesopores less than 10 nm vary apparently and increase with increasing distances from the burner plane, while the pores larger than 10 nm are almost unchanged.

Li-jun SUN; Yan GONG; Qing-hua GUO; Guang-suo YU

2014-01-01T23:59:59.000Z

204

Thermophotovoltaic power generation systems using natural gas-fired radiant burners  

Science Journals Connector (OSTI)

Thermophotovoltaic (TPV) power generation in gas-fired furnaces is attracting technical attention. Considerable work has been done in the area of low bandgap GaSb cell-based TPV systems as well as silicon solar cell-based TPV systems. Previous investigations have shown that a radiant burner with a high conversion level of fuel to radiation energy must be developed to realize an efficient TPV system. In our work, we investigated different natural gas-fired radiant burners in order to raise the conversion of fuel energy to thermal radiation. These burners were used as radiation sources to establish and test two TPV prototype systems. It was found that for a non-surface combustion radiant burner, the radiation output can be enhanced using a thermal radiator with a porous structure. Also, we developed a cascaded radiant burner that generates two streams of radiation output. One stream illuminates silicon concentrator solar cells while the other drives low bandgap GaSb cells. In this way, useful radiation output and thus TPV system efficiency are significantly increased due to the cascaded utilization of combustion heat and optimized thermal management.

K. Qiu; A.C.S. Hayden

2007-01-01T23:59:59.000Z

205

Ion-mobility Spectrometry Based NOx Sensor - Nuclear Engineering Division  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

NPNS > Sensors and NPNS > Sensors and Instrumentation and NDE > Energy System Application > DOE Office of Transportation Technologies > Ion-mobility Spectrometry Based NOx Sensor Capabilities Sensors and Instrumentation and Nondestructive Evaluation Overview Energy System Applications Overview DOE Office of Fossil Energy DOE Office of Transportation Technologies Ion-mobility Spectrometry Based NOx Sensor DOE Office of Power Technology Work for Others Safety-Related Applications Homeland Security Applications Biomedical Applications Millimiter Wave Group Papers Other NPNS Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Sensors and Instrumentation and Nondestructive Evaluation Ion-mobility Spectrometry Based NOx Sensor

206

Study of the effects of ambient conditions upon the performance of fan powered, infrared, natural gas burners. Quarterly technical progress report, October 1, 1995--December 31, 1995  

SciTech Connect (OSTI)

Infrared burner is a surface combustor that elevates the temperature of the burner head to a radiant condition. Applications of radiant burners includes boilers, air heaters, deep fat fryers, process heaters, and immersion heaters. On reason for the present interest in this type of burner is its low NO{sub x} emissions, which is attributed to the fact that a large proportion of the combustion heat is given out as radiation from the burner surface, which results in relatively low gas temperature in the combustion zone compared to that of a conventional free-flame burner. As a consequence, such burners produce less NO{sub x}, mainly by the so-called prompt-NO mechanism. A porous radiant burner testing facility was built, consisting of spectral radiance as well as flue gas composition measurements. Measurement capabilities were tested using methane; results were consistent with literature.

Bai, Tiejun; Yeboah, Y.D.; Sampath, R.

1996-01-01T23:59:59.000Z

207

System approach to reducing NO{sub x} emissions on a three cell high burner, heavy oil-fired boiler  

SciTech Connect (OSTI)

This paper documents the installation of plug-in low NO{sub x} burners on a utility boiler with cell burners. The original rapid mix burners and typical close burner centerline spacing produced a very hot furnace environment resulting in extremely high NO{sub x} emissions, in this case as high as 1.0 lbs/MMBtu. The unit was a {number_sign}6 oil-fired, 560 MW{sub e} supercritical pressure, three-cell burner boiler at Commonwealth Electric`s Canal Station, Unit {number_sign}1. This paper presents the results including emissions and boiler performance of the retrofit of DB Riley low NO{sub x} STS (Swirl Tertiary Stage) burners. Low NO{sub x} burners were used in conjunction with close-coupled overfire air using existing burner openings. The project reduced NO{sub x} emissions greater than 705 while firing {number_sign}6 oil, and this was accomplished with less than 10% flue gas recirculation.

Green, R.W.; Dorai, X.A. [DB Riley, Inc., Worcester, MA (United States); Hurley, B.A. [Commonwealth Electric Co., Wareham, MA (United States)

1996-11-01T23:59:59.000Z

208

Oxidation State Optimization for Maximum Efficiency of NOx Adsorber...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Directions in Engine-Efficiency and Emissions Research (DEER) Conference in Detroit, MI, September 27-30, 2010. deer10li.pdf More Documents & Publications Lean NOx Trap...

209

Functionality of Commercial NOx Storage-Reduction Catalysts and...  

Broader source: Energy.gov (indexed) [DOE]

N.A. Ottinger, J.A. Pihl, T.J. Toops, C. Finney, M. Lance, C. Stuart Daw, "Types, Spatial Distribution, Stability, and Performance Impact of Sulfur on a Lean NOx Trap...

210

Reducing NOx emissions using the humid air motor concept  

Science Journals Connector (OSTI)

The use of water to prevent NOx...formation during the combustion process is well known. The H.A.M. system (Humid Air Motor) is an original and promising solution compared ... . This system involves evaporating l...

Emmanuel Riom; Lars-Ola Larsson; Ulf Hagström

2002-05-01T23:59:59.000Z

211

Enhanced High Temperature Performance of NOx Storage/Reduction...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. ace026peden2010o.pdf More Documents & Publications Mechanisms of Sulfur Poisoning of NOx Adsorber (LNT) Materials...

212

Lean Gasoline Engine Reductant Chemistry During Lean NOx Trap Regeneration  

SciTech Connect (OSTI)

Lean NOx Trap (LNT) catalysts can effectively reduce NOx from lean engine exhaust. Significant research for LNTs in diesel engine applications has been performed and has led to commercialization of the technology. For lean gasoline engine applications, advanced direct injection engines have led to a renewed interest in the potential for lean gasoline vehicles and, thereby, a renewed demand for lean NOx control. To understand the gasoline-based reductant chemistry during regeneration, a BMW lean gasoline vehicle has been studied on a chassis dynamometer. Exhaust samples were collected and analyzed for key reductant species such as H2, CO, NH3, and hydrocarbons during transient drive cycles. The relation of the reductant species to LNT performance will be discussed. Furthermore, the challenges of NOx storage in the lean gasoline application are reviewed.

Choi, Jae-Soon [ORNL] [ORNL; Prikhodko, Vitaly Y [ORNL] [ORNL; Partridge Jr, William P [ORNL] [ORNL; Parks, II, James E [ORNL; Norman, Kevin M [ORNL] [ORNL; Huff, Shean P [ORNL] [ORNL; Chambon, Paul H [ORNL] [ORNL; Thomas, John F [ORNL] [ORNL

2010-01-01T23:59:59.000Z

213

Polonium release from an ATW burner system with liquid lead-bismuth coolant  

SciTech Connect (OSTI)

The authors analyzed polonium release hazards in a conceptual pool-type ATW burner with liquid lead-bismuth eutectic (LBE) coolant. Simplified quantitative models are used based on experiments and real NPP experience. They found little Po contamination outside the burner under normal operating conditions with nominal leakage from the gas system. In sudden gas leak and/or coolant spill accidents, the P contamination level can reach above the regulation limit but short exposure would not lead to severe health consequences. They are evaluating and developing mitigation methods.

Li, N. [Los Alamos National Lab., NM (United States); Yefimov, E.; Pankratov, D. [Inst. of Physics and Power Engineering, Obninsk (Russian Federation)

1998-04-01T23:59:59.000Z

214

Reducing fishing vessel fuel consumption and NOX emissions  

Science Journals Connector (OSTI)

There is a growing concern with the impact of marine operations on the environment. This requires reducing fuel consumption and vessel pollution during operation. On-board computers and satellite communications will enable the operator to reduce fuel consumption and NOX emissions during vessel operations. This paper presents the results of a study on this problem and how such an on-board system could be implemented to reduce fuel consumption and engine NOX emissions.

Robert Latorre

2001-01-01T23:59:59.000Z

215

Group effects on fuel NOx emissisons from coal  

E-Print Network [OSTI]

GROUP EFFECTS ON FUEL NOX EMISSIONS FROM COAL A Thesis by ANAND ANAKKARA VADAKKATH Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August... 1991 Major Subject: Mechanical Engineering GROUP EFFECTS ON FUEL NOX EMISSIONS FROM COAL A Thesis by ANAND ANAKKARA VADAKKATH Approved ss to style and content by: K. Annamalai (Chair of Committee) Cr, R. Laster (Member) J. Wagne (Member...

Vadakkath, Anand Anakkara

2012-06-07T23:59:59.000Z

216

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program through the ninth quarter April-June 2002 in the following task areas: Task 1--Oxygen Enhanced Combustion, Task 2--Oxygen Transport Membranes, Task 3--Economic Evaluation and Task 4--Program Management. The program is proceeding in accordance with the objectives for the third year. Full-scale testing using the Industrial Boiler Simulation Facility (ISBF) at Alstom Power was completed. The pilot scale experiments to evaluate the effect of air preheat and transport air stoichiometric ratio (SR) on NOx emissions were conducted at the University of Utah. Combustion modeling activities continued with full-scale combustion test furnace simulations. An OTM element was tested in Praxair's single tube high-pressure test facility and two thermal cycles were completed. PSO1d elements of new dimension were tested resulting in a lower flux than previous PSO1d elements of different dimensions, however, no element deformation was observed. Economic evaluation has confirmed the advantage of oxygen-enhanced combustion. Two potential host beta sites have been identified and proposals submitted.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2002-08-01T23:59:59.000Z

217

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program through the fourth quarter January-March 2002 in the following task areas: Task 1--Oxygen Enhanced Combustion, Task 2--Oxygen Transport Membranes, Task 3--Economic Evaluation and Task 4--Program Management. This report will also recap the results of the past year. The program is proceeding in accordance with the objectives for the second year. The first round of pilot scale testing with 3 bituminous coals was completed at the University of Utah. Full-scale testing equipment is in place and experiments are underway. Coal combustion lab-scale testing was completed at the University of Arizona. Modest oxygen enhancement resulted in NOx emissions reduction. Combustion modeling activities continued with pilot-scale combustion test furnace simulations. 75% of target oxygen flux was demonstrated with small PSO1 tube in Praxair's single tube high-pressure test facility. The production of oxygen with a purity of better than 99.999% was demonstrated. Economic evaluation has confirmed the advantage of oxygen-enhanced combustion. Two potential host sites have been identified.

David R. Thompson; Lawrence E. Bool; Jack C. Chen

2002-04-01T23:59:59.000Z

218

Measurement and analysis of heating of paper with gas-fired infrared burner  

E-Print Network [OSTI]

. Gas-fired IR heaters produce combustion on the burner surface by ignition of a pre-mixed air and fuel streams. The combustion raises the surface temperature to ranges of 800-1,100°C to emit radiation, mainly in the medium IR range, which has a...

Husain, Abdullah Nadir

2000-01-01T23:59:59.000Z

219

ASU nitrogen sweep gas in hydrogen separation membrane for production of HRSG duct burner fuel  

DOE Patents [OSTI]

The present invention relates to the use of low pressure N2 from an air separation unit (ASU) for use as a sweep gas in a hydrogen transport membrane (HTM) to increase syngas H2 recovery and make a near-atmospheric pressure (less than or equal to about 25 psia) fuel for supplemental firing in the heat recovery steam generator (HRSG) duct burner.

Panuccio, Gregory J.; Raybold, Troy M.; Jamal, Agil; Drnevich, Raymond Francis

2013-04-02T23:59:59.000Z

220

A Novel Integrated TPV Power Generation System Based on a Cascaded Radiant Burner  

Science Journals Connector (OSTI)

A cascaded radiant burner has been developed and based on this burner a novel integrated TPV system has been built. In this system low bandgap GaSb cells and silicon concentrator solar cells are employed integratedly. The unique cascaded radiant burner consists of two different radiators which cascade?emit two streams of radiation with different spectra. The two different radiators are arranged in tandem with their surface temperatures being different as well. Two streams of radiation output are matched respectively to the bandgaps of silicon cells and GaSb cells. Thus one stream of radiation output illuminates silicon concentrator solar cells while the other drives low bandgap GaSb cells in the integrated system. In this work the combustion performance of the cascaded radiant burner was investigated at varying degrees of exhaust heat recuperation. The electrical output characteristics of both silicon concentrator solar cells and GaSb cells in the gas combustion?driven TPV system were measured under various operating conditions. It is shown that this innovative design considerably increases the TPV system efficiency due to the cascaded utilization of heat released during natural gas combustion and the optimized thermal management.

K. Qiu; A. C. S. Hayden

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Design and Evaluation of a High Temperature Burner Duct Recuperator System  

E-Print Network [OSTI]

"The Babcock & Wilcox Company (B&W) has completed a program to design, construct, install, and field test a ceramic-based high-temperature burner-duct-recuperator (HTBDR) in an industrial setting. The unit was capable of operating in corrosive, high...

Parks, W. P.; DeBellis, C. L.; Kneidel, K.

222

Simulation of Nitrogen Emissions in a Premixed Hydrogen Flame Stabilized on a Low Swirl Burner  

E-Print Network [OSTI]

of fuels such as pure hydrogen and hydrogen-seeded hydrocarbon mixtures. However, many hydrogen-rich fuels in the context of a laboratory-scale low swirl burner fueled with a lean hydrogen-air mixture at atmospheric of burning lean hydrogen or hydrogen-enriched lean hydrocar- bon fuels (e.g., [2­5]). For these fuels

Bell, John B.

223

Effect of fatty acid composition in vegetable oils on combustion processes in an emulsion burner  

Science Journals Connector (OSTI)

Abstract The use of vegetable oils as a fuel in burners is an alternative which offers certain advantages over the use of vegetable oils in engines. The present work explores the use of four oils: rapeseed, sunflower, soya, and a commercial mixture-seed as heating fuel oil (HFO). The article relates the composition of the fatty acids in the various vegetable oils to the combustion products obtained in an emulsion burner. The work has been carried out in three stages. Firstly, describing the use of vegetable oils as a fuel and determining the fatty acid composition by proton NMR. Secondly, combustion of the vegetable oils studied is performed using an emulsion burner, varying the burner adjustments, and analysing combustion gases. Thirdly, exploring the link between the fatty acids contained in each oil and the combustion efficiency and combustion gas concentration for each oil type. Due to the fatty acids they contain, not all the oils behave equally, even though their description as fuels is very similar.

J. San José; M.A. Sanz-Tejedor; Y. Arroyo

2015-01-01T23:59:59.000Z

224

(RA) Gila's Departments (RA) Jena's Departments BK Anesthesiology LN Biomedical Engineering  

E-Print Network [OSTI]

(RA) Gila's Departments (RA) Jena's Departments BK Anesthesiology LN Biomedical Engineering JC Biochemistry & Biophysics JC Biostatistics & Computational Biology BK Biomedical Genetics BK Brain & Cognitive Development & Disease AC Center for Oral Biology LN Center for Primary Care AB Center for Pediatric Biomedical

Mahon, Bradford Z.

225

Sensor for Individual Burner Control of Coal Firing Rate, Fuel-Air Ratio and Coal Fineness Correlation  

SciTech Connect (OSTI)

Accurate, cost-efficient monitoring instrumentation has long been considered essential to the operation of power plants. Nonetheless, for the monitoring of coal flow, such instrumentation has been sorely lacking and technically difficult to achieve. With more than half of the electrical power in the United States currently supplied by coal, energy generated by this resource is critical to the US economy. The demand for improvement in this area has only increased as a result of the following two situations: First, deregulation has produced a heightened demand for both reduced electrical cost and improved grid connectivity. Second, environmental concerns have simultaneously resulted in a need for both increased efficiency and reduced carbon and NOx emissions. A potential approach to addressing both these needs would be improvement in the area of combustion control. This would result in a better heat rate, reduced unburned carbon in ash, and reduced NOx emissions. However, before feedback control can be implemented, the ability to monitor coal flow to the burners in real-time must be established. While there are several ''commercially available'' products for real-time coal flow measurement, power plant personnel are highly skeptical about the accuracy and longevity of these systems in their current state of development. In fact, following several demonstration projects of in-situ coal flow measurement systems in full scale utility boilers, it became obvious that there were still many unknown influences on these instruments during field applications. Due to the operational environment of the power plant, it has been difficult if not impossible to sort out what parameters could be influencing the various probe technologies. Additionally, it has been recognized for some time that little is known regarding the performance of coal flow splitters, even where rifflers are employed. Often the coal flow distribution from these splitters remains mal-distributed. There have been mixed results in the field using variable orifices in coal pipes. Development of other coal flow control devices has been limited. An underlying difficulty that, to date, has hindered the development of an accurate instrument for coal flow measurements is the fact that coal flow is characterized by irregular temporal and spatial variation. However, despite the inherent complexity of the dynamic system, the system is in fact deterministic. Therefore, in principle, the coal flow can be deduced from the dynamics it exhibits. Nonetheless, the interactions are highly nonlinear, rendering standard signal processing approaches, which rely on techniques such as frequency decomposition, to be of little value. Foster-Miller, Inc. has developed a methodology that relates the complex variation in such systems to the information of interest. This technology will be described in detail in Section 2. A second concern regarding the current measurement systems is installation, which can be labor-intensive and cost-prohibitive. A process that does not require the pulverizer to be taken off line would be highly desirable. Most microwave and electrostatic methods require drilling up to 20 holes in the pipe, all with a high degree of precision so as to produce a proper alignment of the probes. At least one electrostatic method requires a special spool piece to be fitted into each existing coal pipe. Overall, these procedures are both difficult and very expensive. An alternative approach is pursued here, namely the development of an instrument that relies on an acoustic signal captured by way of a commercial accelerometer. The installation of this type of sensor is both simpler and less invasive than other techniques. An accelerometer installed in a pipe wall need not penetrate through the wall, which means that the system may be able to remain on line during the installation. Further, due to the fact that the Dynamical Instruments technology, unlike other systems, does not rely on uniformity of the air or coal profile, the installation location need not be on a long, straight run

R. Demler

2006-04-01T23:59:59.000Z

226

CONTROL OF POLLUTANT EMISSIONS IN NATURAL GAS DIFFUSION FLAMES BY USING CASCADE BURNERS  

SciTech Connect (OSTI)

The goal of this exploratory research project is to control the pollutant emissions of diffusion flames by modifying the air infusion rate into the flame. The modification was achieved by installing a cascade of venturis around the burning gas jet. The basic idea behind this technique is controlling the stoichiometry of the flame through changing the flow dynamics and rates of mixing in the combustion zone with a set of venturis surrounding the flame. A natural gas jet diffusion flame at burner-exit Reynolds number of 5100 was examined with a set of venturis of specific sizes and spacing arrangement. The thermal and composition fields of the baseline and venturi-cascaded flames were numerically simulated using CFD-ACE+, an advanced computational environment software package. The instantaneous chemistry model was used as the reaction model. The concentration of NO was determined through CFD-POST, a post processing utility program for CFD-ACE+. The numerical results showed that, in the near-burner, midflame and far-burner regions, the venturi-cascaded flame had lower temperature by an average of 13%, 19% and 17%, respectively, and lower CO{sub 2} concentration by 35%, 37% and 32%, respectively, than the baseline flame. An opposite trend was noticed for O{sub 2} concentration; the cascaded flame has higher O{sub 2} concentration by 7%, 26% and 44%, in average values, in the near-burner, mid-flame and far-burner regions, respectively, than in the baseline case. The results also showed that, in the near-burner, mid-flame, and far-burner regions, the venturi-cascaded flame has lower NO concentrations by 89%, 70% and 70%, in average values, respectively, compared to the baseline case. The numerical results substantiate that venturi-cascading is a feasible method for controlling the pollutant emissions of a burning gas jet. In addition, the numerical results were useful to understand the thermo-chemical processes involved. The results showed that the prompt-NO mechanism plays an important role besides the conventional thermal-NO mechanism. The computational results of the present study need to be validated experimentally.

Dr. Ala Qubbaj

2001-12-30T23:59:59.000Z

227

Experimental Study on the Basic Phenomena of Flame Stabilization Mechanism in a Porous Burner for Premixed Combustion Application  

Science Journals Connector (OSTI)

This was the driving force for investigation of porous burner application in exothermic thermal partial oxidation (POX) for production of syngas feed for MCFCs (Molten Carbonate Fuel Cells) and SOFCs (Solid Oxide Fuel Cells)(13) or for combustion of low calorific gases from landfills and waste pyrolysis. ... Although, due to the different maximal operational temperatures of the sponges it was not possible to perform all the investigations for the same set of conditions, a comparison between different burners can be made for the overlapping areas of the stable burning regions. ... Porous burners for lean-burn applications ...

Neda Djordjevic; Peter Habisreuther; Nikolaos Zarzalis

2012-10-18T23:59:59.000Z

228

Results of initial operation of the Jupiter Oxygen Corporation oxy-fuel 15 MWth burner test facility  

SciTech Connect (OSTI)

Jupiter Oxygen Corporation (JOC), in cooperation with the National Energy Technology Laboratory (NETL), constructed a 15 MWth oxy-fuel burner test facility with Integrated Pollutant Removal (IPRTM) to test high flame temperature oxy-fuel combustion and advanced carbon capture. Combustion protocols include baseline air firing with natural gas, oxygen and natural gas firing with and without flue gas recirculation, and oxygen and pulverized coal firing with flue gas recirculation. Testing focuses on characterizing burner performance, determining heat transfer characteristics, optimizing CO2 capture, and maximizing heat recovery, with an emphasis on data traceability to address retrofit of existing boilers by directly transforming burner systems to oxy-fuel firing.

Thomas Ochs, Danylo Oryshchyn, Rigel Woodside, Cathy Summers, Brian Patrick, Dietrich Gross, Mark Schoenfield, Thomas Weber and Dan O'Brien

2009-04-01T23:59:59.000Z

229

METHANE de-NOX FOR UTILITY PC BOILERS  

SciTech Connect (OSTI)

The project seeks to develop and validate a new pulverized coal combustion system to reduce utility PC boiler NO{sub x} emissions to 0.15 lb per million Btu or less without post-combustion flue gas cleaning. Work during previous reporting periods completed the design, installation, shakedown and initial PRB coal testing of a 3-million Btu/h pilot system at BBP's Pilot-Scale Combustion Facility (PSCF) in Worcester, MA. Based on these results, modifications to the gas-fired preheat combustor and PC burner were defined, along with a modified testing plan and schedule. A revised subcontract was executed with BBP to reflect changes in the pilot testing program. Modeling activities were continued to develop and verify revised design approaches for both the Preheat gas combustor and PC burner. Reactivation of the pilot test system was then begun with BBP personnel. During the current reporting period, reactivation of the pilot test system was completed with the modified Preheat gas combustor. Following shakedown of the modified gas combustor alone, a series of successful tests of the new combustor with PRB coal using the original PC burner were completed. NO{sub x} at the furnace exit was reduced significantly with the modified gas combustor, to as low as 150 ppm with only 36 ppm CO (both corrected to 3% O{sub 2}). Concurrent with testing, GTI and BBP collaborated on development of two modified designs for the PC burner optimized to fire preheated char and pyrolysis products from the Preheat gas combustor.

Joseph Rabovitser; Bruce Bryan; Serguei Nester; Stan Wohadlo

2002-10-29T23:59:59.000Z

230

Low NOx firing technology of Mitsubishi Heavy Industries  

SciTech Connect (OSTI)

This paper presents super low NO{sub x} combustion technologies successfully developed by MHI (Mitsubishi Heavy Industries, Ltd.) and its use in practice. PM (Pollution Minimum) burners directly reduce NO{sub x} from the burners themselves and MACT (Mitsubishi Advanced Combustion Technology) system, an in-furnace NO{sub x} removal system, reduces NO{sub x} generated from the main burners within the boiler. These firing systems are applicable to coal, oil, gas and also to other exotic fuels like Orimulsion or CWM (Coal Water Mixture). MRS (Mitsubishi Rotary Separator) mills minimizes unburnt carbon with its reliable ultra-fine grinding of coal and hence contribute to low NO{sub x}. These technologies have been applied in various combinations to 227 boilers for both new installation and retrofit jobs. Large 1,000 MWe oil or gas fired boilers and 700 MWe coal fired boilers have been put into commercial use, and a 1,000 MWe coal fired boiler is under commissioning. The technologies have been applied to small sized boilers for industrial use as well. All the delivered systems have been working both domestic and overseas to the customers` satisfaction.

Kaneko, Shozo; Tokuda, Kimishiro; Sato, Susumu [Mitsubishi Heavy Industries, Yokohama (Japan)

1996-01-01T23:59:59.000Z

231

METHANE de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

Preparations for conducting large-scale combustion tests with caking bituminous coal continued during the start of this quarter. Major project accomplishments related to bituminous coal testing included: a CFD preheat model and evaluation, an update of the process flow diagram and a detailed preheat burner mechanical design (suitable for construction) for firing bituminous coal. Installation and testing of the 85 MMBtu/h bituminous coal preheating system was planned to take place before the end of December. Based on the inability to conduct testing in Riley's Commercial Burner Test Facility (CBTF) during freezing weather, a schedule review indicated required site work for testing bituminous coal at the CBTF could not be completed before freezing weather set in at the site. Further bituminous preheat modification work was put on hold and efforts turned to securing the test facility over the winter season. Bituminous coal tests are therefore delayed; April-May 2005 is earliest estimate of when testing can resume. A request for a time extension was submitted to DOE to extend the project through September 2005 to allow time to secure additional funding and complete the bituminous coal testing. Removal of the PRB PC Preheater from the CBTF burner deck was completed. Decommissioning of the CBTF for the winter was also completed.

Bruce Bryan; Joseph Rabovitser; Serguei Nester; Stan Wohadlo

2004-12-31T23:59:59.000Z

232

Advanced tangential low NOx systems - development and results  

SciTech Connect (OSTI)

The development of low NO{sub x} combustion systems has identified the near burner flame conditions as critical in determining the eventual NO{sub x} emission levels. In this paper the development of this criterion, in respect of tangentially coal ({open_quote}T{close_quote}) fired power generation boilers, is discussed together with their commercial application. The potential ultra low NO{sub x} performance of these techniques requires a deeper understanding of coal characteristics in addition to the standard properties involving volatile release rates, the behaviour of particulate clouds and their burning velocities. Aerodynamic properties including fuel air mixing, velocity and particulate distribution are all of fundamental importance and can be studied by means of isothermal physical modelling and computational fluid dynamics (CFD). Amalgamation of these various aspects into burner and combustion system design can be considered as NO{sub x} control by flame management and can be applied to conventional systems as well as to the development of advanced low NO{sub x} burner technology. Low NO{sub x} equipment based on this technology is known as the EnviroNO{sub x}{trademark} system.

Allen, J.W.; Beal, P.R. [Rolls-Royce Industrial Power Group, Derby (United Kingdom)

1996-01-01T23:59:59.000Z

233

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

Increased environmental regulations will require utility boilers to reduce NO{sub x} emissions to less than 0.15lb/MMBtu in the near term. Conventional technologies such as Selective Catalytic Reduction (SCR) and Selective Non-Catalytic Reduction (SNCR) are unable to achieve these lowered emission levels without substantially higher costs and major operating problems. Oxygen enhanced combustion is a novel technology that allows utilities to meet the NO{sub x} emission requirements without the operational problems that occur with SCR and SNCR. Furthermore, oxygen enhanced combustion can achieve these NO{sub x} limits at costs lower than conventional technologies. The objective of this program is to demonstrate the use of oxygen enhanced combustion as a technical and economical method of meeting the EPA State Implementation Plan for NO{sub x} reduction to less than 0.15lb/MMBtu for a wide range of boilers and coal. The oxygen enhanced coal combustion program (Task 1) focused this quarter on the specific objective of exploration of the impact of oxygen enrichment on NO{sub x} formation utilizing small-scale combustors for parametric testing. Research efforts toward understanding any limitations to the applicability of the technology to different burners and fuels such as different types of coal are underway. The objective of the oxygen transport membrane (OTM) materials development program (Task 2.1) is to ascertain a suitable material composition that can be fabricated into dense tubes capable of producing the target oxygen flux under the operating conditions. This requires that the material have sufficient oxygen permeation resulting from high oxygen ion conductivity, high electronic conductivity and high oxygen surface exchange rate. The OTM element development program (Task 2.2) objective is to develop, fabricate and characterize OTM elements for laboratory and pilot reactors utilizing quality control parameters to ensure reproducibility and superior performance. A specific goal is to achieve a material that will sinter to desired density without compromising other variables such as reaction to binder systems or phase purity. Oxygen-enhanced combustion requires a facility which is capable of supplying high purity oxygen (>99.5%) at low costs. This goal can be achieved through the thermal integration of high temperature air separation with ceramic OTM. The objective of the OTM process development program (Task 2.3) is to demonstrate successfully the program objectives on a lab-scale single OTM tube reactor under process conditions comparable to those of an optimum large-scale oxygen facility. This quarterly technical progress report will summarize work accomplished for the Program through the first quarter April--June 2000 in the following task areas: Task 1 Oxygen Enhanced Coal Combustion; Task 2 Oxygen Transport Membranes; and Task 4 Program Management.

Lawrence E. Bool; Jack C. Chen; David R. Thompson

2000-07-01T23:59:59.000Z

234

SCReaming for Low NOx - SCR for the Light Duty Market | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

SCReaming for Low NOx - SCR for the Light Duty Market SCReaming for Low NOx - SCR for the Light Duty Market Presentation given at DEER 2006, August 20-24, 2006, Detroit, Michigan....

235

Engine and Reactor Evaluations of HC-SCR for Diesel NOx Reduction...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Engine and Reactor Evaluations of HC-SCR for Diesel NOx Reduction Engine and Reactor Evaluations of HC-SCR for Diesel NOx Reduction Focus is the heavy duty, US dynamometer...

236

Safe and compact ammonia storage/delivery systems for SCR-DeNOX...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Safe and compact ammonia storagedelivery systems for SCR-DeNOX in automotive units Safe and compact ammonia storagedelivery systems for SCR-DeNOX in automotive units Presentation...

237

Development of a Stand-Alone Urea-SCR System for NOx Reduction...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Stand-Alone Urea-SCR System for NOx Reduction in Marine Diesel Engines Development of a Stand-Alone Urea-SCR System for NOx Reduction in Marine Diesel Engines Stand-alone urea SCR...

238

Fuel-Borne Reductants for NOx Aftertreatment: Preliminary EtOH...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Reductants for NOx Aftertreatment: Preliminary EtOH SCR Study Fuel-Borne Reductants for NOx Aftertreatment: Preliminary EtOH SCR Study 2003 DEER Conference Presentation: Oak Ridge...

239

Initial Results of the DeNOx SCR System by Urea Injection in...  

Broader source: Energy.gov (indexed) [DOE]

Initial Results of the DeNOx SCR System by Urea Injection in the Euro 5 Bus Initial Results of the DeNOx SCR System by Urea Injection in the Euro 5 Bus 2005 Diesel Engine Emissions...

240

The Effects of Hydrocarbons on NOx Reduction over Fe-based SCR Catalyst  

Broader source: Energy.gov [DOE]

Study of effects of hydrocarbons on ammonia storage and NOx reduction over a commercial Fe-zeolite SCR catalyst to understand catalyst behaviors at low temperatures and improve NOx reduction performance and reduce system cost

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Industry-Utility Collaborative Efforts to Address Environmental Concerns- Dispatching for Localized NOx Reduction  

E-Print Network [OSTI]

these objectives. The approach involves dispatching NOx-producing equipment (e.g., boilers and gas turbines) to achieve minimum NOx production during ozone alert periods and purchasing supplemental power under a special tariff to replace any loss in self...

Hamilton, D. E.; Helmick, R. W.; Lambert, W. J.

242

Intra-catalyst Reductant Chemistry in Lean NOx Traps: A Study...  

Broader source: Energy.gov (indexed) [DOE]

Intra-catalyst Reductant Chemistry in Lean NOx Traps: A Study on Sulfur Effects Intra-catalyst Reductant Chemistry in Lean NOx Traps: A Study on Sulfur Effects Presentation given...

243

NOx formation by steam injection using detailed chemical kinetics  

Science Journals Connector (OSTI)

In order to improve thermal efficiency of gas turbine system and better control NOx emission, the injection of steam into a gas turbine combustor has been employed. This study has used both chemical equilibrium calculations and the counterflow diffusion flame calculations of methane-air flame aiming at the elucidation of the NOx reduction mechanism due to the steam injection. The influence of the equivalence ratios, the amount of steam and method of injection, the influence of the temperature of the preheated air and fuel has been also investigated. In this study, the GRI-Mech was employed for modelling the chemical reactions.

H. Yamashita; D. Zhao; S.N. Danov; T. Furuhata; N. Arai

2001-01-01T23:59:59.000Z

244

Aeroderivative Gas Turbines Can Meet Stringent NOx Control Requirements  

E-Print Network [OSTI]

for controlling NOx emissions will be discussed. Steam injection has a very favorable effect on engine performance raising both the power output and efficiency. As an example, full steam injection in the GE LM5000 gas turbine :tncreases the power output from... methods for reducing the NOx levels of the LM2500 and LM5000 engines. These engines are aircraft-derivative turbine engines, which are used in a variety of industrial applications. Efforts have been concentrated on the use of water or steam injection...

Keller, S. C.; Studniarz, J. J.

245

Orimulsion in low NO{sub x} burner based combustion systems  

SciTech Connect (OSTI)

The potential of Orimulsion (a bitumen in water emulsion) as a suitable fuel for power generation boilers has been established subject to full recognition being given to the environmental aspects of its application. An important factor is the control of NO{sub x} emissions from the combustion process. Work on NO{sub x} control when firing Orimulsion has inevitably been based on the techniques utilized for low NO{sub x} fuel oil combustion. This fundamental work has indicated the different performance characteristics of these two fuels when fired in similar low NO{sub x} burner configurations. Nevertheless it has been demonstrated that Orimulsion can achieve similar, and perhaps even improved, low NO{sub x} performance when compared to heavy (No. 6) fuel oil, and can be used with equal flexibility to that of heavy fuel oil in low NO{sub x} combustion systems based on both burner and in furnace staging techniques.

Allen, J.W.; Beal, P. [International Combustion Ltd., Derby (United Kingdom). Rolls-Royce Industrial Power Group

1996-12-31T23:59:59.000Z

246

The Chemistry of the Thermal DeNOx Process: A Review of the Technology's Possible Application to control of NOx from Diesel Engines  

SciTech Connect (OSTI)

This paper presents a review of the Thermal DeNOx process with respect to its application to control of NOx emissions from diesel engines. The chemistry of the process is discussed first in empirical and then theoretical terms. Based on this discussion the possibilities of applying the process to controlling NOx emissions from diesel engines is considered. Two options are examined, modifying the requirements of the chemistry of the Thermal DeNOx process to suit the conditions provided by diesel engines and modifying the engines to provide the conditions required by the process chemistry. While the former examination did not reveal any promising opportunities, the latter did. Turbocharged diesel engine systems in which the turbocharger is a net producer of power seem capable of providing the conditions necessary for NOx reduction via the Thermal DeNOx reaction.

Lyon, Richard

2001-08-05T23:59:59.000Z

247

Pollutant Exposures from Natural Gas Cooking Burners: A Simulation-Based Assessment for Southern California  

SciTech Connect (OSTI)

Residential natural gas cooking burners (NGCBs) can emit substantial quantities of pollutants and they are typically used without venting. The objective of this study is to quantify pollutant concentrations and occupant exposures resulting from NGCB use in California homes. A mass balance model was applied to estimate time-dependent pollutant concentrations throughout homes and the "exposure concentrations" experienced by individual occupants. The model was applied to estimate nitrogen dioxide (NO{sub 2}), carbon monoxide (CO), and formaldehyde (HCHO) concentrations for one week each in summer and winter for a representative sample of Southern California homes. The model simulated pollutant emissions from NGCBs, NO{sub 2} and CO entry from outdoors, dilution throughout the home, and removal by ventilation and deposition. Residence characteristics and outdoor concentrations of CO and NO{sub 2} were obtained from available databases. Ventilation rates, occupancy patterns, and burner use were inferred from household characteristics. Proximity to the burner(s) and the benefits of using venting range hoods were also explored. Replicate model executions using independently generated sets of stochastic variable values yielded estimated pollutant concentration distributions with geometric means varying less than 10%. The simulation model estimates that in homes using NGCBs without coincident use of venting range hoods, 62%, 9%, and 53% of occupants are routinely exposed to NO{sub 2}, CO, and HCHO levels that exceed acute health-based standards and guidelines. NGCB use increased the sample median of the highest simulated 1-hr indoor concentrations by 100, 3000, and 20 ppb for NO{sub 2}, CO, and HCHO, respectively. Reducing pollutant exposures from NGCBs should be a public health priority. Simulation results suggest that regular use of even moderately effective venting range hoods would dramatically reduce the percentage of homes in which concentrations exceed health-based standards.

Logue, Jennifer M.; Klepeis, Neil E.; Lobscheid, Agnes B.; Singer, Brett C.

2014-06-01T23:59:59.000Z

248

D0 Solenoid Upgrade Project: Chimney LN2 Radiation Shield Attachment Area Calculation  

SciTech Connect (OSTI)

A short calculation was done to check the attachment method of the radiation shield to it's LN2 cooling tubes. The case considered was only for the obround chimney section. The proposed attachment method was to use 1/8-inch plug welds spaced every 5-inch along the length of the shield. The calculations were done conservatively for 6-inch spacing between plug welds. The criteria used was that the LN2 shield warmest temperature be less than 2 K above the temperature of the LN2 fluid. Using a very conservative heat transfer model. the calculations predict that the warmest temperature on the radiation shield will be < 1.4 K warmer than the LN2 fluid temperature.

Rucinski, R.; /Fermilab

1993-05-26T23:59:59.000Z

249

NETL: Advanced NOx Emissions Control: Control Technology - ALTA for Cyclone  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Full-Scale Demonstration of ALTA NOx Control for Cyclone-Fired Boilers Full-Scale Demonstration of ALTA NOx Control for Cyclone-Fired Boilers The primary goal of this project was to evaluate a technology called advanced layered technology application (ALTA) as a means to achieve NOx emissions below 0.15 lb/MMBtu in a cyclone boiler. Reaction Engineering International (REI) conducted field testing and combustion modeling to refine the process design, define the optimum technology parameters, and assess system performance. The ALTA NOx control technology combines deep staging from overfire air, rich reagent injection (RRI), and selective non-catalytic reduction (SNCR). Field testing was conducted during May-June 2005 at AmerenUE's Sioux Station Unit 1, a 500 MW cyclone boiler unit that typically burns an 80/20 blend of Powder River Basin subbituminous coal and Illinois No. 6 bituminous coal. Parametric testing was also conducted with 60/40 and 0/100 blends. The testing also evaluated process impacts on balance-of-plant issues such as the amount of unburned carbon in the ash, slag tapping, waterwall corrosion, ammonia slip, and heat distribution.

250

Lean NOx Reduction with Dual Layer LNT/SCR Catalysts  

Broader source: Energy.gov (indexed) [DOE]

Roles of ceria in LNT SCR: I ncreases NOx storage & NO conversion at low tem perature P rom otes W GS reaction Conditions: Lean: 500 ppm NO, 5% O 2 ; 60s Rich: 2.5% H 2 ; 5s X H2...

251

Experimental study of combustion of hydrogen–syngas/methane fuel mixtures in a porous burner  

Science Journals Connector (OSTI)

Lean premixed combustion of hydrogen–syngas/methane fuel mixtures was investigated experimentally to demonstrate fuel flexibility of a two-section porous burner. The un-insulated burner was operated at atmospheric pressure. Combustion was stabilized at the interface of silicon-carbide coated carbon foam of 26 pores per centimeter (ppcm) and 4 ppcm. Methane (CH4) content in the fuel was decreased from 100% to 0% (by volume), with the remaining amount split equally between carbon monoxide (CO) and hydrogen (H2), the two reactive components of the syngas. Experiments for different fuel mixtures were conducted at a fixed air flow rate, while the fuel flow rate was varied to obtain a range of adiabatic flame temperatures. The CO and nitric oxide ( NO x ) emissions were measured downstream of the porous burner, in the axial direction to identify the post-combustion zone and in the transverse direction to quantify combustion uniformity. For a given adiabatic flame temperature, increasing H2/CO content in the fuel mixture decreased both the CO and NO x emissions. Presence of H2/CO in the fuel mixture also decreased temperature near the lean blow-off limit, especially for higher percentages of CO and H2 in the fuel.

S.K. Alavandi; A.K. Agrawal

2008-01-01T23:59:59.000Z

252

Evaluation of gas-reburning and low NO sub x burners on a wall fired boiler  

SciTech Connect (OSTI)

Low NO{sub x} burners operate on the principle of delayed mixing between the coal fuel and burner air, so that less NO{sub x} is formed. Gas reburning is a combustion modification technique that consists of firing 80--85 percent of the fuel corresponding to the total heat release in the lower furnace. Reduction of NO{sub x} to molecular nitrogen (N{sub 2}) is accomplished via the downstream injection of the remaining fuel requirement in the form of natural gas (which also reduces the total SO{sub x} emissions). In a third stage, burnout air is injected at the lower temperatures in the upper furnace to complete the combustion process without generating significant additional NO{sub x}. The specific goal of this project is to demonstrate NO{sub x} emission reductions of 75 percent or more as a result of combing Low NO{sub x} Burners and Gas Reburning on a utility boiler having the design characteristics mentioned above. A Host Site Agreement has been signed by EER and a utility company in the State of Colorado: Public Service Company of Colorado (Cherokee Unit No. 3, 172 MW{sub e}) front wall fired boiler near Denver.

Not Available

1992-01-15T23:59:59.000Z

253

Premixed burner studies of NO{sub x} formation and control  

SciTech Connect (OSTI)

With the enactment of the Clean Air Act Amendments of 1990, there is now additional incentive for the development of gas turbine systems with very low NO{sub x} emissions characteristics. Further, the development of low NO{sub x} burners that are capable of utilizing low-heating-value gases derived from coal based systems is an essential component for a number of fossil energy technologies including IGCC and second-generation PFBC. However, the chemistry associated with NO{sub x} formation is complicated, and attempts to reduce these emissions often result in increases in other undesirable species such as CO or N{sub 2}O. In view of these complexities, it is useful to study NO{sub x} formation and NO{sub x} control strategies in a well-controlled, lab-scale burner system. In this way, detailed knowledge about the intricate interrelationships between the various chemical pathways can be obtained and subsequently applied to bench-scale and larger systems. The current project involves both chemical kinetic modeling as well as experimental studies performed in a premixed burner system to generate these data.

Castleton, K.H.; Straub, D.L. [USDOE Morgantown Energy Technology Center, WV (United States); Stephens, J.W. [National Research Council, Washington, DC (United States); McManus, T.J. [Oak Ridge Associated Universities, Inc., TN (United States)

1993-01-01T23:59:59.000Z

254

TPV Power Generation System Using a High Temperature Metal Radiant Burner  

Science Journals Connector (OSTI)

Interest has grown in micro?combined heat and power (micro?CHP). Thermophotovoltaic (TPV) generation of electricity in fuel?fired furnaces is one of the micro?CHP technologies that are attracting technical attention. Previous investigations have shown that a radiant burner that can efficiently convert fuel chemical energy into radiation energy is crucial to realize a practical TPV power system. In this work we developed a TPV power generation system using a gas?fired metal radiant burner. The burner consists of a high temperature alloy emitter which could have an increased emissivity at short wavelengths and low emissivity at long wavelengths. The metal emitter is capable of bearing high temperatures of interest to fuel?fired TPV power conversion. GaSb TPV cells were tested in the combustion?driven radiant source. Electric output characteristics of the TPV cells were investigated at various operating conditions. The electric power output of the TPV cells was demonstrated to be promising. At an emitter temperature of 1185°C an electric power density of 0.476 W/cm2 was generated by the GaSb cells. It is shown that the metal emitter is attractive and could be applied to practical fuel?fired TPV power systems.

K. Qiu; A. C. S. Hayden; E. Entchev

2007-01-01T23:59:59.000Z

255

Large eddy simulation of forced ignition of an annular bluff-body burner  

SciTech Connect (OSTI)

The optimization of the ignition process is a crucial issue in the design of many combustion systems. Large eddy simulation (LES) of a conical shaped bluff-body turbulent nonpremixed burner has been performed to study the impact of spark location on ignition success. This burner was experimentally investigated by Ahmed et al. [Combust. Flame 151 (2007) 366-385]. The present work focuses on the case without swirl, for which detailed measurements are available. First, cold-flow measurements of velocities and mixture fractions are compared with their LES counterparts, to assess the prediction capabilities of simulations in terms of flow and turbulent mixing. Time histories of velocities and mixture fractions are recorded at selected spots, to probe the resolved probability density function (pdf) of flow variables, in an attempt to reproduce, from the knowledge of LES-resolved instantaneous flow conditions, the experimentally observed reasons for success or failure of spark ignition. A flammability map is also constructed from the resolved mixture fraction pdf and compared with its experimental counterpart. LES of forced ignition is then performed using flamelet fully detailed tabulated chemistry combined with presumed pdfs. Various scenarios of flame kernel development are analyzed and correlated with typical flow conditions observed in this burner. The correlations between, velocities and mixture fraction values at the sparking time and the success or failure of ignition, are then further discussed and analyzed. (author)

Subramanian, V.; Domingo, P.; Vervisch, L. [CORIA-CNRS and INSA de Rouen, Technopole du Madrillet, BP 8, 76801 Saint-Etienne-du-Rouvray (France)

2010-03-15T23:59:59.000Z

256

METHANE de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

Large-scale combustion tests with caking bituminous coal has stopped. This stoppage has come about due to limitations in current funding available to continue large scale research and development activities at Riley's Commercial Burner Test Facility (CBTF) of the PC Preheat technology. The CBTF was secured and decommissioned in the previous quarter; work this quarter has focused on disposition of PC Preheat experimental equipment at the CBTF as well as methods for disposal of about 100 tons of residual PRB test coal in storage. GTI was granted a no-cost time extension through September 2005; a final report is due in December 2005.

Bruce Bryan; Joseph Rabovitser; Serguei Nester; Stan Wohadlo

2005-06-30T23:59:59.000Z

257

LOW NOx EMISSIONS IN A FUEL FLEXIBLE GAS TURBINE  

SciTech Connect (OSTI)

In alignment with Vision 21 goals, a study is presented here on the technical and economic potential for developing a gas turbine combustor that is capable of generating less that 2 ppm NOx emissions, firing on either coal synthesis gas or natural gas, and being implemented on new and existing systems. The proposed solution involves controlling the quantity of H2 contained in the fuel. The presence of H2 leads to increased flame stability such that the combustor can be operated at lower temperatures and produce less thermal NOx. Coal gas composition would be modified using a water gas shift converter, and natural gas units would implement a catalytic partial oxidation (CPOX) reactor to convert part of the natural gas feed to a syngas before fed back into the combustor. While both systems demonstrated technical merit, the economics involved in implementing such a system are marginal at best. Therefore, Praxair has decided not to pursue the technology any further at this time.

Raymond Drnevich; James Meagher; Vasilis Papavassiliou; Troy Raybold; Peter Stuttaford; Leonard Switzer; Lee Rosen

2004-08-01T23:59:59.000Z

258

Diesel Aftertreatment Modeling:? A Systems Approach to NOx Control  

Science Journals Connector (OSTI)

Diesel Aftertreatment Modeling:? A Systems Approach to NOx Control ... Despite these challenges, the proposed system was able to make several advances:? (1) meeting the T2B5 CO, HC, and PM standards; (2) quantifying the ability to meet T2B5 NOx levels with a more durable DOC and a rapid warm-up strategy to heat the exhaust, especially during the initial cold-start portion of the Federal Test Procedure (FTP) drive cycle. ... The remainder of this work is organized as follows:? The formulation, calibration, and validation of the DOC and SCR models are presented in section 2. The DOC and SCR models are combined for an analysis of the AT system as a whole in section 3. The final section of the article summarizes the results and offers some general conclusions. ...

Santhoji R. Katare; Joseph E. Patterson; Paul M. Laing

2007-03-16T23:59:59.000Z

259

Evaluation of gas-reburning and low NO sub x burners on a wall fired boiler  

SciTech Connect (OSTI)

This clean coal technology project will demonstrate a combination of two developed technologies to reduce both NO{sub x} and (to some extent) SO{sub x} emissions: Gas reburning and low NO{sub x} burners. The demonstrations will be conducted on a pre-NSPS utility boiler representative of US boilers that contribute significantly to the inventory of acid rain precursor emissions: a wall fired unit. Low NO{sub x} burners operate on the principle of delayed mixing between the coal fuel and burner air, so that less NO{sub x} is burned. Gas reburning is a combustion modification technique that consists of firing 80--85 percent of the fuel corresponding to the total heat release in the lower furnace. Reduction of NO{sub x} to molecular nitrogen (N{sub 2}) is accomplished via the downstream injection of the remaining fuel requirement in the form of natural gas (which also reduces the total SO{sub x} emissions). In a third stage, burnout air is injected at lower temperatures in the upper furnace to complete the combustion process without generating significant additional NO{sub x}. The specific goal of this project is to demonstrate NO{sub x} and SO{sub x} emission reductions of 75 percent or more as a result of combining LNB and GR to a utility boiler having the design characteristics mentioned above. A Host Site Agreement has been signed by EER and a utility company in the State of Colorado: Public Service Company of Colorado (Cherokee Unit No. 3, 172 MW{sub e}) front wall fired boiler near Denver.

Not Available

1991-04-26T23:59:59.000Z

260

3 - Fuel considerations and burner design for ultra-supercritical power plants  

Science Journals Connector (OSTI)

Abstract: This chapter discusses fuel quality and its influence on utility boiler design and impact on performance, with the emphasis on coal and biomass as fuels. Performance issues addressed include system capacity, heat rate, availability, and maintenance, and how they are affected by fuel quality. The effect of fuel quality on handling, storage, processing, and preparation is discussed. In addition, the effect of fuel quality on burner design and ignition stability is presented. Future trends are discussed, specifically focusing on continued use of biomass as a means to reduce greenhouse gas emissions in the utility sector.

B. Miller

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

A Study of Gasification of Municipal Solid Waste Using a Double Inverse Diffusion Flame Burner  

Science Journals Connector (OSTI)

A Study of Gasification of Municipal Solid Waste Using a Double Inverse Diffusion Flame Burner ... Furthermore, the experiences of the waste incineration industry driven in the past by regulatory as well as technical issues may facilitate their commercial potentials outside the common market, especially in highly populated developing countries such as Korea with scarce landfill sites. ... Recently, several new technologies that involve gasification or combinations of pyrolysis, combustion, and gasification processes are currently being brought into the market for energy-efficient, environmentally friendly and economically sound methods of thermal processing of wastes. ...

Tae-Heon Kwak; Seungmoon Lee; Sanjeev Maken; Ho-Chul Shin; Jin-Won Park; Young Done Yoo

2005-08-24T23:59:59.000Z

262

DOE - Office of Legacy Management -- LASL Land Parcels A B C E K LN PL - NM  

Office of Legacy Management (LM)

Land Parcels A B C E K LN PL - Land Parcels A B C E K LN PL - NM 07 FUSRAP Considered Sites Site: LASL LAND PARCELS A, B, C, E, K, LN, PL (NM.07 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: Los Alamos County , New Mexico NM.07-2 Evaluation Year: 1986 NM.07-1 Site Operations: No specific operations identified for these tracts of land. NM.07-1 NM.07-2 Site Disposition: Eliminated - Radiation levels below criteria. Declared as surplus real property and offered for public sale in 1972. NM.07-1 NM.07-2 Radioactive Materials Handled: None Specifically Indicated NM.07-1 NM.07-2 Primary Radioactive Materials Handled: None Specifically Indicated Radiological Survey(s): Yes NM.07-2 Site Status: Eliminated from consideration under FUSRAP

263

Study of the effects of ambient conditions upon the performance of fan powered, infrared, natural gas burners. Quarterly technical progress report, September 1--September 30, 1994  

SciTech Connect (OSTI)

The objective of this investigation is to characterize the operation of fan powered infrared(PIR) burner at various barometric pressures (operating altitude) and gas compositions and develop design guidelines for appliances containing PIR burners for satisfactory performance. In this program, the theoretical basis for the behavior of PIR burners will be established through analysis of the combustion, heat and mass transfer, and other related processes which determine the performance of PIR burners. Based on the results of this study, a first order model of the performance of the burner, including radiant output will be developed. The model will be applied to predict the performance of the selected burner and modified through comparison with test results. Concurrently, an experimental setup will be devised and built. This experimental rig will be a modified appliance, capable of measuring the heat and combustion product output, as well as providing a means by which the radiant heat output can be measured. The burner will be selected from an existing commercial appliance, a commercial deep fat fryer, and will be of a scale that will be compatible with the laboratory facilities in the Combustion Laboratory at Clark Atlanta University. Theoretical analysis and formulation of the PIR burner performance model has been started and the development of the test facilities and experimental setup has also been initiated. These are described.

Bai, T.

1994-10-01T23:59:59.000Z

264

NOx Control Options and Integration for US Coal Fired Boilers  

SciTech Connect (OSTI)

This is the Final Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project was to develop cost-effective analysis tools and techniques for demonstrating and evaluating low-NOx control strategies and their possible impact on boiler performance for boilers firing US coals. The Electric Power Research Institute (EPRI) provided co-funding for this program. This project included research on: (1) In furnace NOx control; (2) Impacts of combustion modifications on boiler operation; (3) Selective Catalytic Reduction (SCR) catalyst testing and (4) Ammonia adsorption/removal on fly ash. Important accomplishments were achieved in all aspects of the project. Rich Reagent Injection (RRI), an in-furnace NOx reduction strategy based on injecting urea or anhydrous ammonia into fuel rich regions in the lower furnace, was evaluated for cyclone-barrel and PC fired utility boilers. Field tests successfully demonstrated the ability of the RRI process to significantly reduce NOx emissions from a staged cyclone-fired furnace operating with overfire air. The field tests also verified the accuracy of the Computational Fluid Dynamic (CFD) modeling used to develop the RRI design and highlighted the importance of using CFD modeling to properly locate and configure the reagent injectors within the furnace. Low NOx firing conditions can adversely impact boiler operation due to increased waterwall wastage (corrosion) and increased soot production. A corrosion monitoring system that uses electrochemical noise (ECN) corrosion probes to monitor, on a real-time basis, high temperature corrosion events within the boiler was evaluated. Field tests were successfully conducted at two plants. The Ohio Coal Development Office provided financial assistance to perform the field tests. To investigate soot behavior, an advanced model to predict soot production and destruction was implemented into an existing reacting CFD modeling tool. Comparisons between experimental data collected in a pilot scale furnace and soot behavior predicted by the CFD model showed good agreement. Field and laboratory tests were performed for SCR catalysts used for coal and biomass co-firing applications. Fundamental laboratory studies were performed to better understand mechanisms involved with catalyst deactivation. Field tests with a slip stream reactor were used to create catalyst exposed to boiler flue gas for firing coal and for co-firing coal and biomass. The field data suggests the mechanisms leading to catalyst deactivation are, in order of importance, channel plugging, surface fouling, pore plugging and poisoning. Investigations were performed to better understand the mechanisms involved with catalyst regeneration through mechanical or chemical methods. A computer model was developed to predict NOx reduction across the catalyst in a SCR. Experiments were performed to investigate the fundamentals of ammonia/fly ash interactions with relevance to the operation of advanced NOx control technologies such as selective catalytic reduction. Measurements were performed for ammonia adsorption isotherms on commercial fly ash samples subjected to a variety of treatments and on the chemistry of dry and semi-dry ammonia removal processes. This work resulted in the first fundamental ammonia isotherms on carbon-containing fly ash samples. This work confirms industrial reports that aqueous solution chemistry takes place upon the introduction of even very small amounts of water, while the ash remains in a semi-dry state.

Mike Bockelie; Marc Cremer; Kevin Davis; Martin Denison; Adel Sarofim; Connie Senior; Hong-Shig Shim; Dave Swenson; Bob Hurt; Eric Suuberg; Eric Eddings; Kevin Whitty; Larry Baxter; Calvin Bartholomew; William Hecker

2006-06-30T23:59:59.000Z

265

A Fast Start-up On-Board Fuel Reformer for NOx Adsorber Regeneration...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fuel Processor for Rapid and Efficient Regeneration of Single Leg NOx Adsorber Systems Hydrogen generation from plasmatron reformers and use for diesel exhaust aftertreatment...

266

High-Throughput Program for the Discovery of NOx Reduction Catalysts...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

2004deerblint.pdf More Documents & Publications WA02042GENERALMOTORSPOWERTRAINDIVWaiverofDomestic.pdf Heavy-Duty NOx Emissions Control: Reformer-Assisted vs....

267

Boosted HCCI for High Power without Engine Knock, and with Ultra-Low NOX Emissions  

Broader source: Energy.gov [DOE]

Advanced engines using HCCI or HCCI-like combustion can provide both high efficiencies and very low emissions of NOX and PM

268

Synergies of High-Efficiency Clean Combustion and Lean NOx Trap...  

Broader source: Energy.gov (indexed) [DOE]

Combustion and Lean NOx Trap Catalysts investigation of potential synergies of low emission advanced combustion techniques and advanced lean exhaust catalytic aftertreatment....

269

E-Print Network 3.0 - aluminosilicates nox reduction Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

RELATIONSHIP BETWEEN Summary: Non-Catalytic Reduction SNCR NOx control throughout the United States and Canada. They correspond... explain why mass balances are not an appro...

270

Flexible CHP System with Low NOx, CO and VOC Emissions | Department...  

Broader source: Energy.gov (indexed) [DOE]

Emissions Flexible CHP System with Low NOx, CO and VOC Emissions Introduction A combined heat and power (CHP) system can be a financially attractive energy option for many...

271

Reduce NOx and Improve Energy Efficiency, Software Tools for Industry, Industrial Technologies Program (ITP) (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes how the Industrial Technologies Program NOx and Energy Assessment Tool (NxEAT) can help petroleum refining and chemical plants improve energy efficiency.

Not Available

2008-12-01T23:59:59.000Z

272

Deactivation mechanisms of NOx storage materials arising from thermal aging and sulfur poisoning  

Broader source: Energy.gov [DOE]

Presents the reliationship between Pt particle size and NOx storage performance over model catalysts. Novel reaction protocol designed to decouple effects of thermal deactivation and incomplete desulfation.

273

16 - Ultra-low nitrogen oxides (NOx) emissions combustion in gas turbine systems  

Science Journals Connector (OSTI)

Abstract: The historical development of gas turbine low \\{NOx\\} combustion from the pioneering NASA work in the early 1970s to the present generation of ultra-low \\{NOx\\} industrial gas turbine combustors is reviewed. The principles of operation of single digit ultra-low \\{NOx\\} gas turbine combustion for industrial applications are outlined. The review shows the potential has been demonstrated by several investigators using different flame stabilizers for \\{NOx\\} to be reduced to 1 ppm at 1700 K, 2 ppm at 1800 K and 3–4 ppm at 1900 K with no influence of operating pressure and with a practical operating flame stability margin. Under these conditions it is shown that no thermal \\{NOx\\} should occur and all the \\{NOx\\} is formed by the prompt \\{NOx\\} mechanisms. The elimination of thermal \\{NOx\\} makes the \\{NOx\\} emissions independent of residence time or reference velocity and independent of pressure. Also there is no influence of air inlet temperature for the same flame temperature. Where legislation requires emissions to be as low as can be achieved, emissions below 4 ppm in production engines are current technology and this review shows the potential to get even lower than this in the future.

G.E. Andrews

2013-01-01T23:59:59.000Z

274

The extended chain compounds Ln {sub 12}(C{sub 2}){sub 3}I{sub 17} (Ln=Pr, Nd, Gd, Dy): Synthesis, structure and physical properties  

SciTech Connect (OSTI)

The title compounds are obtained in high yield from stoichiometric mixtures of Ln, LnI{sub 3} and graphite, heated at 900-950 deg. C in welded Ta containers. The crystal structures of new Pr and Nd phases determined by single-crystal X-ray diffraction are related to those of other Ln {sub 12}(C{sub 2}){sub 3}I{sub 17}-type compounds (C 2/c, a=19.610(1) and 19.574(4) A, b=12.406(2) and 12.393(3) A, c=19.062(5) and 19.003(5) A, {beta}=90.45(3){sup o} and 90.41(3){sup o}, for Pr{sub 12}(C{sub 2}){sub 3}I{sub 17} and Nd{sub 12}(C{sub 2}){sub 3}I{sub 17}, respectively). All compounds contain infinite zigzag chains of C{sub 2}-centered metal atom octahedra condensed by edge-sharing into the [tcc] {sub {infinity}} sequence (c=cis, t=trans) and surrounded by edge-bridging iodine atoms as well as by apical iodine atoms that bridge between chains. The polycrystalline Gd{sub 12}(C{sub 2}){sub 3}I{sub 17} sample exhibits semiconducting thermal behavior which is consistent with an ionic formulation (Ln {sup 3+}){sub 12}(C{sub 2} {sup 6-}){sub 3}(I{sup -}){sub 17}(e{sup -}) under the assumption that one extra electron is localized in metal-metal bonding. The magnetization measurements on Nd{sub 12}(C{sub 2}){sub 3}I{sub 17}, Gd{sub 12}(C{sub 2}){sub 3}I{sub 17} and Dy{sub 12}(C{sub 2}){sub 3}I{sub 17} indicate the coexistence of competing magnetic interactions leading to spin freezing at T {sub f}=5 K for the Gd phase. The Nd and Dy compounds order antiferromagnetically at T {sub N}=25 and 29 K, respectively. For Dy{sub 12}(C{sub 2}){sub 3}I{sub 17}, a metamagnetic transition is observed at a critical magnetic field H{approx}25 kOe. - Graphical abstract: Zigzag chains of edge-sharing metal atom octahedra in Ln {sub 12}(C{sub 2}){sub 3}I{sub 17}.

Ryazanov, Mikhail [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, D-70569 Stuttgart (Germany); Mattausch, Hansjuergen [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, D-70569 Stuttgart (Germany); Simon, Arndt [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, D-70569 Stuttgart (Germany)], E-mail: A.Simon@fkf.mpg.de

2007-04-15T23:59:59.000Z

275

Swozzle based burner tube premixer including inlet air conditioner for low emissions combustion  

DOE Patents [OSTI]

A burner for use in a combustion system of a heavy-duty industrial gas turbine includes a fuel/air premixer having an air inlet, a fuel inlet, and an annular mixing passage. The fuel/air premixer mixes fuel and air into a uniform mixture for injection into a combustor reaction zone. The burner also includes an inlet flow conditioner disposed at the air inlet of the fuel/air premixer for controlling a radial and circumferential distribution of incoming air. The pattern of perforations in the inlet flow conditioner is designed such that a uniform air flow distribution is produced at the swirler inlet annulus in both the radial and circumference directions. The premixer includes a swozzle assembly having a series of preferably air foil shaped turning vanes that impart swirl to the airflow entering via the inlet flow conditioner. Each air foil contains internal fuel flow passages that introduce natural gas fuel into the air stream via fuel metering holes that pass through the walls of the air foil shaped turning vanes. By injecting fuel in this manner, an aerodynamically clean flow field is maintained throughout the premixer. By injecting fuel via two separate passages, the fuel/air mixture strength distribution can be controlled in the radial direction to obtain optimum radial concentration profiles for control of emissions, lean blow outs, and combustion driven dynamic pressure activity as machine and combustor load are varied.

Tuthill, Richard Sterling (Bolton, CT); Bechtel, II, William Theodore (Scotia, NY); Benoit, Jeffrey Arthur (Scotia, NY); Black, Stephen Hugh (Duanesburg, NY); Bland, Robert James (Clifton Park, NY); DeLeonardo, Guy Wayne (Scotia, NY); Meyer, Stefan Martin (Troy, NY); Taura, Joseph Charles (Clifton Park, NY); Battaglioli, John Luigi (Glenville, NY)

2002-01-01T23:59:59.000Z

276

METHANE de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

The project seeks to develop and validate a new pulverized coal combustion system to reduce utility PC boiler NO{sub x} emissions to 0.15 lb/million Btu or less without post-combustion flue gas cleaning. Work during the quarter included continuation of the equipment fabrication effort for pilot system components. Successful proof-of-performance testing of the IGT-designed pilot-scale natural gas-fired coal preheat combustor was completed by IGT during the quarter. The combustor was then disassembled and shipped for installation in the pilot-scale test system in BBP's Coal Burner Test Facility (CBTF) in Worcester, MA. Delivery of the balance of the pilot system components from the fabricator began near the end of the quarter, with components being installed in the pilot test facility as they were received.

Joseph Rabovitser; Bruce Bryan; Serguei Nester; Stan Wohadlo

2001-06-30T23:59:59.000Z

277

Methane de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

Large-scale combustion tests with caking bituminous coal was on hold this quarter mainly due to Riley's Commercial Burner Test Facility (CBTF) not having adequate weatherproofing to support operation under freezing conditions. The CBTF was secured and decommissioned for the winter season. CBTF bituminous coal tests shall continue to remain on hold now as a result of project funding limitations, however. No further modifications at the CBTF are planned until needed support is obtained. Activities this quarter have concentrated on finding additional support for the project. Currently, GTI has been granted a no-cost time extension through September 2005 and efforts to secure more support will continue in hopes that large-scale preheat caking bituminous combustion tests will be carried out as planned.

Bruce Bryan; Joseph Rabovitser; Serguei Nester; Stan Wohadlo

2005-03-31T23:59:59.000Z

278

METHANE de-NOX for Utility PC Boilers  

SciTech Connect (OSTI)

Large-scale combustion tests with caking bituminous coal has stopped. This stoppage has come about due to limitations in current funding available to continue large scale research and development activities at Riley Power's Commercial Burner Test Facility (CBTF) of the PC Preheat technology. The CBTF was secured and decommissioned in the previous quarter; work this quarter work completed the securing the proper disposition of all PC Preheat experimental equipment at the PSCF and CBTF and completing negotiations with AES Westover (a power plant in Johnson City, New York) to accept 130 tons of residual PRB test coal in storage. The coal transport to Westover occurred at the end of August. GTI was granted a no-cost time extension through September 2005; immediate efforts are focused on completing a draft final report, which is due in October 31, 2005 and the final report in December.

Joseph Rabovitser; Serguei Nester; Stan Wohadlo

2005-09-30T23:59:59.000Z

279

Structural integrity assessment of type 201LN stainless steel cryogenic pressure vessels  

SciTech Connect (OSTI)

The ASME Boiler and Pressure Vessel Code Committee approved the Code Case 2123 in 1992 which allows the use of Type 201LN stainless steel in the construction of ASME Section VIII, Division 1 and Division 2 pressure vessels for -320{degrees}F applications. Type 201LN stainless steel is a nitrogen strengthened modified version of ASTM A240, Type 201 stainless steel with a restricted chemistry. The Code allowable design stresses for Type 201LN for Division 1 vessels are approximately 27% higher than Type 304 stainless steel and equal to that of the 5 Ni and 9 Ni steels. This paper discusses the important features of the Code Case 2123 and the structural integrity assessment of Type 201LN stainless steel cryogenic vessels. Tensile, Charpy-V-notch and fracture properties have been obtained on several heats of this steel including weldments. A linear-elastic fracture mechanics analysis has been conducted to assess the expected fracture mode and the fracture-critical crack sizes. The results have been compared with Type 304 stainless steel, 5 Ni and 9 Ni steel vessels.

Rana, M.D.; Zawierucha, R. [Praxair, Inc., Tonawanda, NY (United States)

1995-12-01T23:59:59.000Z

280

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS  

SciTech Connect (OSTI)

This is the fifth Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NOx control strategies and their possible impact on boiler performance for firing US coals. The Electric Power Research Institute (EPRI) is providing cofunding for this program. This program contains multiple tasks and good progress is being made on all fronts. Field tests for NOx reduction in a cyclone fired utility boiler due to using Rich Reagent Injection (RRI) have been started. CFD modeling studies have been started to evaluate the use of RRI for NOx reduction in a corner fired utility boiler using pulverized coal. Field tests of a corrosion monitor to measure waterwall wastage in a utility boiler have been completed. Computational studies to evaluate a soot model within a boiler simulation program are continuing. Research to evaluate SCR catalyst performance has started. A literature survey was completed. Experiments have been outlined and two flow reactor systems have been designed and are under construction. Commercial catalyst vendors have been contacted about supplying catalyst samples. Several sets of new experiments have been performed to investigate ammonia removal processes and mechanisms for fly ash. Work has focused on a promising class of processes in which ammonia is destroyed by strong oxidizing agents at ambient temperature during semi-dry processing (the use of moisture amounts less than 5 wt-%). Both ozone and an ozone/peroxide combination have been used to treat both basic and acidic ammonia-laden ashes.

Mike Bockelie; Marc Cremer; Kevin Davis; Connie Senior; Bob Hurt; Eric Eddings; Larry Baxter

2001-10-10T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

SOx/NOx sorbent and process of use  

DOE Patents [OSTI]

An alumina sorbent capable of adsorbing NOx and SOx from waste gases and being regenerated by heating above 600 C. is made by incorporating an alumina stabilizing agent into the sorbent. A preferred method is to add the stabilizer when the alumina is precipitated. The precipitated powder is formed subsequently into a slurry, milled and dripped to form the stabilizing spheroidal alumina particles. These particles are impregnated with an alkali metal or alkaline earth metal to form the stabilized sorbent. Alumina stabilizers include one or more of silica, lanthana, other rare earths, titania, zirconia and alkaline earths.

Ziebarth, M.S.; Hager, M.J.; Beeckman, J.W.; Plecha, S.

1993-01-19T23:59:59.000Z

282

Global impact of fossil fuel combustion on atmospheric NOx Larry W. Horowitz  

E-Print Network [OSTI]

potential than emissions in the United States to perturb the global oxidizing power of the atmosphere. #12% of NOx concentrations in the lower and middle troposphere throughout the extratropical northern of the ocean. Sources in the United States are found to contribute about half of the fossil fuel NOx over

Jacob, Daniel J.

283

On the NOx production by laboratory electrical discharges and lightning Vernon Cooraya,, Mahbubur Rahman a  

E-Print Network [OSTI]

in estimating the global production of NOx by lightning flashes, including field measurements carried out during influence extrapolation of laboratory data to lightning flashes. Second, an estimation of the NOx yield per lightning flash is made by treating the lightning flash as a composite event consisting of several discharge

Florida, University of

284

Measurements of NOX produced by rocket-triggered lightning M. Rahman,1  

E-Print Network [OSTI]

lightning flashes were triggered using the rocket- and-wire technique at the International Center atmosphere. [3] A direct measurement of the NOX generated by a natural lightning flash is impractical because generated by lightning flashes. Due to a large number of uncertainties involved, the estimates of global NOX

Florida, University of

285

A Novel Technology for the Reduction of NOx on Char by Microwaves  

E-Print Network [OSTI]

of these applications. The technology is directed at NOx reduction but may also address other pollutants like SO2. The technology employees char, a heat treated and devolitilized form of coal, to adsorb NOx from the flue (or waste) gas. Adsorption of greater than 99...

Buenger, C.; Peterson, E.

286

Improvement of lightning NOx in the TM5 global chemistry transport model  

E-Print Network [OSTI]

, a key greenhouse gas, and for the formation of the hydroxyl28 radical, which removes methane, also a key greenhouse gas. Estimates of the global lightning NOx production vary29 by an order of magnitude interpreting the lighting NOx contribu-36 tion from satellite and aircraft observations of NO2 in comparison

Haak, Hein

287

Development of a Stand-Alone Urea-SCR System for NOx Reduction in Marine Diesel Engines  

Broader source: Energy.gov [DOE]

Stand-alone urea SCR system was developed for marine diesel engines and showed a 50-percent reduction in NOx.

288

Development of Compact Gaseous Sensors with Internal Reference for Monitoring O2 and NOx in Combustion Environments  

Broader source: Energy.gov [DOE]

Compact sensors have been developed to allow for real-time monitoring of O2 and NOx during combustion.

289

Advanced NOx Emissions Control: Control Technology - Second Generation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Second Generation Advanced Reburning Second Generation Advanced Reburning General Electric - Energy and Environmental Research Corporation (GE-EER) is carrying out a two Phase research program to develop novel Advanced Reburning (AR) concepts for high efficiency and low cost NOx control from coal-fired utility boilers. AR technologies are based on combination of basic reburning and N-agent/promoter injections. Phase I of the project was successfully completed and EER was selected to continue to develop AR technology during Phase II. Phase I demonstrated that AR technologies are able to provide effective NOx control for coal-fired combustors. Three technologies were originally envisioned for development: AR-Lean, AR-Rich, and Multiple Injection AR (MIAR). Along with these, three additional technologies were identified during the project: reburning plus promoted SNCR; AR-Lean plus promoted SNCR; and AR-Rich plus promoted SNCR. The promoters are sodium salts, in particular sodium carbonate. These AR technologies have different optimum reburn heat input levels and furnace temperature requirements. For full scale application, an optimum technology can be selected on a boiler-specific basis depending on furnace temperature profile and regions of injector access.

290

2004 Conference on Reburning for NOX Control Reburning on Trial  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2004 Conf. on Reburning for NOx Control Reburning on Trial 2004 Conf. on Reburning for NOx Control Reburning on Trial May 18, 2004 Table of Contents Disclaimer Papers and Presentations Reburning Overview Commercial Reburning Experience Biomass Reburning Other Applications of Reburning Posters Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government or any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

291

Burning syngas in a high swirl burner: Effects of fuel composition  

Science Journals Connector (OSTI)

Abstract Flame characteristics of swirling non-premixed H2/CO syngas fuel mixtures have been simulated using large eddy simulation and detailed chemistry. The selected combustor configuration is the TECFLAM burner which has been used for extensive experimental investigations for natural gas combustion. The large eddy simulation (LES) solves the governing equations on a structured Cartesian grid using a finite volume method, with turbulence and combustion modelling based on the localised dynamic Smagorinsky model and the steady laminar flamelet model respectively. The predictions for H2-rich and CO-rich flames show considerable differences between them for velocity and scalar fields and this demonstrates the effects of fuel variability on the flame characteristics in swirling environment. In general, the higher diffusivity of hydrogen in H2-rich fuel is largely responsible for forming a much thicker flame with a larger vortex breakdown bubble (VBB) in a swirling flame compare to the H2-lean but CO-rich syngas flames.

K.K.J. Ranga Dinesh; K.H. Luo; M.P. Kirkpatrick; W. Malalasekera

2013-01-01T23:59:59.000Z

292

Multifractal detrended fluctuation analysis of combustion flames in four-burner impinging entrained-flow gasifier  

E-Print Network [OSTI]

On a laboratory-scale testing platform of impinging entrained-flow gasifier with four opposed burners, the flame images for diesel combustion and gasification process were measured with a single charge coupled device (CCD) camera. The two-dimensional multifractal detrended fluctuation analysis was employed to investigate the multifractal nature of the flame images. Sound power-law scaling in the annealed average of detrended fluctuations was unveiled when the order $q>0$ and the multifractal feature of flame images were confirmed. Further analyses identified two multifractal parameters, the minimum and maximum singularity $\\alpha_{\\min}$ and $\\alpha_{\\max}$, serving as characteristic parameters of the multifractal flames. These two characteristic multifractal parameters vary with respect to different experimental conditions.

Niu, Miao-Ren; Yan, Zhuo-Yong; Guo, Qing-Hua; Liang, Qin-Feng; Wang, Fu-Chen; Yu, Zun-Hong

2007-01-01T23:59:59.000Z

293

A Blueprint for GNEP Advanced Burner Reactor Startup Fuel Fabrication Facility  

SciTech Connect (OSTI)

The purpose of this article is to identify the requirements and issues associated with design of GNEP Advanced Burner Reactor Fuel Facility. The report was prepared in support of providing data for preparation of a NEPA Environmental Impact Statement in support the U. S. Department of Energy (DOE) Global Nuclear Energy Partnership (GNEP). One of the GNEP objectives was to reduce the inventory of long lived actinide from the light water reactor (LWR) spent fuel. The LWR spent fuel contains Plutonium (Pu) -239 and other transuranics (TRU) such as Americium-241. One of the options is to transmute or burn these actinides in fast neutron spectra as well as generate the electricity. A sodium-cooled Advanced Recycling Reactor (ARR) concept was proposed to achieve this goal. However, fuel with relatively high TRU content has not been used in the fast reactor. To demonstrate the utilization of TRU fuel in a fast reactor, an Advanced Burner Reactor (ABR) prototype of ARR was proposed, which would necessarily be started up using weapons grade (WG) Pu fuel. The WG Pu is distinguished by relatively highest proportions of Pu-239 and lesser amount of other actinides. The WG Pu was assumed to be used as the startup fuel along with TRU fuel in lead test assemblies. Because such fuel is not currently being produced in the US, a new facility (or new capability in an existing facility) was being considered for fabrication of WG Pu fuel for the ABR. It was estimated that the facility will provide the startup fuel for 10-15 years and would take 3 to 5 years to construct.

S. Khericha

2010-12-01T23:59:59.000Z

294

Lattice distortions in layered type arsenides LnTAs{sub 2} (Ln=La-Nd, Sm, Gd, Tb; T=Ag, Au): Crystal structures, electronic and magnetic properties  

SciTech Connect (OSTI)

The lanthanide coinage-metal diarsenides LnTAs{sub 2} (Ln=La, Ce-Nd, Sm; T=Ag, Au) have been reinvestigated and their structures have been refined from single crystal X-ray data. Two different distortion variants of the HfCuSi{sub 2} type are found: PrAgAs{sub 2}, NdAgAs{sub 2}, SmAgAs{sub 2}, GdAgAs{sub 2}, TbAgAs{sub 2}, NdAuAs{sub 2} and SmAuAs{sub 2} crystallize as twofold superstructures in space group Pmcn with the As atoms of their planar layers forming zigzag chains, whereas LaAgAs{sub 2}, CeAgAs{sub 2} and PrAuAs{sub 2} adopt a fourfold superstructure (space group Pmca) with cis-trans chains of As atoms. The respective atomic positions can be derived from the HfCuSi{sub 2} type by group-subgroup relations. The compounds with zigzag chains of As atoms exhibit metallic behaviour while those with cis-trans chains are semiconducting as measured on powder pellets. The majority of the compounds including 4f elements show antiferromagnetic ordering at T{sub N}<20 K. - Text3: Zigzig vs. cis-trans.

Rutzinger, D.; Bartsch, C. [Anorganische Chemie, Fachrichtung Chemie und Lebensmittelchemie, Technische Universitaet Dresden, D-01062 Dresden (Germany); Doerr, M. [Institut fuer Festkoerperphysik, Technische Universitaet Dresden, D-01062 Dresden (Germany); Rosner, H. [Max-Planck-Institut fuer Chemische Physik fester Stoffe, Noethnitzer Str. 40, D-01187 Dresden (Germany); Neu, V. [IFW Dresden, Institut fuer metallische Werkstoffe, Helmholtzstr. 20, D-01069 Dresden (Germany); Doert, Th., E-mail: thomas.doert@chemie.tu-dresden.d [Anorganische Chemie, Fachrichtung Chemie und Lebensmittelchemie, Technische Universitaet Dresden, D-01062 Dresden (Germany); Ruck, M. [Anorganische Chemie, Fachrichtung Chemie und Lebensmittelchemie, Technische Universitaet Dresden, D-01062 Dresden (Germany)

2010-03-15T23:59:59.000Z

295

Mechanical properties of cold-rolled AISI 304LN steel at low temperatures  

SciTech Connect (OSTI)

Mechanical properties of 0--70% cold-rolled AISI 304LN steel (0, 16 wt.% N) were investigated by means of tensile and Charpy V-notch impact tests between room temperature and {minus}196 C. Fracture surfaces of the tested specimens were investigated using SEM (scanning electron microscope). Austenite stability against {alpha}{prime}-martensite formation during cooling and during deformation in cold-rolling and mechanical testing was determined using magnetic measurements.

Ilola, R.J.; Haenninen, H.E. [Helsinki Univ. of Technology, Espoo (Finland). Lab. of Engineering Materials; Heinaekari, M.J. [Kvaerner Masa-Yards Oy, Turku (Finland)

1996-12-01T23:59:59.000Z

296

Nitrogen Oxides (NOx), Why and How They are Controlled  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Air Quality EPA 456/F-99-006R Air Quality EPA 456/F-99-006R Environmental Protection Planning and Standards November 1999 Agency Research Triangle Park, NC 27711 Air EPA-456/F-99-006R November 1999 Nitrogen Oxides (NOx), Why and How They Are Controlled Prepared by Clean Air Technology Center (MD-12) Information Transfer and Program Integration Division Office of Air Quality Planning and Standards U.S. Environmental Protection Agency Research Triangle Park, North Carolina 27711 ii DISCLAIMER This report has been reviewed by the Information Transfer and Program Integration Division of the Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency and approved for publication. Approval does not signify that the contents of this report reflect the views and policies of the U.S. Environmental Protection Agency. Mention of trade

297

Low NOx nozzle tip for a pulverized solid fuel furnace  

DOE Patents [OSTI]

A nozzle tip [100] for a pulverized solid fuel pipe nozzle [200] of a pulverized solid fuel-fired furnace includes: a primary air shroud [120] having an inlet [102] and an outlet [104], wherein the inlet [102] receives a fuel flow [230]; and a flow splitter [180] disposed within the primary air shroud [120], wherein the flow splitter disperses particles in the fuel flow [230] to the outlet [104] to provide a fuel flow jet which reduces NOx in the pulverized solid fuel-fired furnace. In alternative embodiments, the flow splitter [180] may be wedge shaped and extend partially or entirely across the outlet [104]. In another alternative embodiment, flow splitter [180] may be moved forward toward the inlet [102] to create a recessed design.

Donais, Richard E; Hellewell, Todd D; Lewis, Robert D; Richards, Galen H; Towle, David P

2014-04-22T23:59:59.000Z

298

METHANE DE-NOX FOR UTILITY PC BOILERS  

SciTech Connect (OSTI)

The primary focus for the project continues to be on developing a PC PREHEAT system design suitable for use with caking coals and readying the 100 MMBtu/h CBTF for testing with noncaking PRB coal. During the current quarter, twenty-two pilot tests were conducted with Central Appalachian (CA) caking coal. The objective for these tests was to achieve continuous operation of the pilot system at its design coal feed rate of 156 lb/h, without plugging or agglomeration in the combustor. One combustor air distribution method tested achieved continuous operation at 110 lb/hr, and inspection of the combustor afterward indicated that this method has potential to solve the caking problem. The NOx results from the pilot caking coal runs indicate that even greater NOx reduction is possible with CA coal than with the PRB coal tested, to levels near 100 ppmv or lower at 4-6% exit oxygen. It was therefore decided to conduct additional pilot tests of the air distribution method to determine how to incorporate this into a workable CA combustor design. Based on current weather and manpower restrictions at the site, this pilot testing is expected to be started in February. The design for the 100 MMBtu/h unit for PRB testing in the CBTF was completed and fabrication and installation started during the quarter. While significant progress has been made in the installation of the unit, weather and combustor fabrication delays are expected to move the start of large-scale testing with PRB coal into February, which will push the project completion date beyond the current 3/30/04 end date. GTI is in the process of developing a revised project schedule and estimated cost to complete.

Bruce Bryan; Joseph Rabovitser; Serguei Nester; Stan Wohadlo

2004-02-06T23:59:59.000Z

299

Influencing factors on NOX emission level during grate conversion of three pelletized energy crops  

Science Journals Connector (OSTI)

Abstract NOX emission behavior of three different pelletized energy crops, a herbaceous one, Brassica carinata, a short rotation coppice, Populus sp., and a blend of them, was assessed during fixed grate conversion. Measurements of NOX emissions were done at combustion conditions that yielded both thermal efficiency and CO emissions according to the European norm (EN 303-5:2012), and results compared to limits established by the Austrian deviations. Based on the experimental data, NOX results fulfilled the Austrian restrictions except during combustion of brassica, which exhibited the highest Fuel-N content. The Fuel-NOX was identified as the main formation mechanism. An opposite relation was determined between the specific NOX emissions and the Fuel-N conversion ratio obtained between the N-rich and the N-lean fuels tested here. The influence of the air supply (amount and distribution) on the NOX formation was also noticeable. In general, a higher proportion of air increased the specific NOX emissions and the Fuel-N conversion ratio. Possibilities to control the NOX emissions level by air staging were rather limited, particularly, during combustion of brassica and the blend because of their peculiarities as ash-rich fuels with high slag formation risk. For attaining an appropriate conversion of these fuels, primary air requirements substantially increased. Due to limitations found during the energy crops conversion, efforts to minimize the level of NOX emissions identified here for the troublesome fuels tested should be mainly focused on attaining both a properly designed air supply system and the grate temperature control as well as on conditioning the Fuel-N content, for instance, by blending.

Maryori Díaz-Ramírez; Fernando Sebastián; Javier Royo; Adeline Rezeau

2014-01-01T23:59:59.000Z

300

Exergy analysis of combustion characteristics and NOx emissions of a dual-fuel engine  

Science Journals Connector (OSTI)

The combustion characteristics and NOx emissions of compression ignition engines working on a dual fuel mode are investigated numerically and their exergetic efficiencies are determined. The model has been validated with available experimental results. The simulation results show that dual fuel engine combustion and trend of NOx emissions are well predicted by the present model. Parametric study showed improvements in engine performance and an increase in NOx emissions with decreased advanced injection timing of the pilot fuel as well as with increased intake temperature and pilot fuel quantity. The maximum values for energy and exergy are found to be comparable.

Mohamed H. Morsy; Abdelrahman El-Leathy; Arif Hepbasli

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

On the Combustion of Hydrogen-Rich Gaseous Fuels with Low Calorific Value in a Porous Burner  

Science Journals Connector (OSTI)

It was also observed that, for the Wobbe Index varying from 5 to 44 MJ/Nm3, it is possible to burn stably at ?260 kW/m2, which reveals the fuel interchangeability potential of the present burner design. ... A range of low calorific value gaseous fuel mixtures containing CH4, H2, CO2, CO, and N2 have been burned in a porous radiant burner to analyze the effects of the fuel composition on flame stability and pollutant emissions. ... There are, however, gaps in the fundamental understanding of syngas combustion and emissions, as most previous research has focused on flames burning individual fuel components such as H2 and CH4, rather than syngas mixts. ...

R. W. Francisco, Jr.; F. Rua; M. Costa; R. C. Catapan; A. A. M. Oliveira

2009-12-30T23:59:59.000Z

302

Experimental Investigations of the Lean Blowout Limit of Different Syngas Mixtures in an Atmospheric, Premixed, Variable-Swirl Burner  

Science Journals Connector (OSTI)

Experimental Investigations of the Lean Blowout Limit of Different Syngas Mixtures in an Atmospheric, Premixed, Variable-Swirl Burner ... The observed higher LBO limit of the diluted generic syngas could be due to the effect of N2 addition on the adiabatic flame temperature (Figure 18) and burning velocity of the generic syngas. ... The LSI does not need to undergo significant alteration to operate with the hydrocarbon fuels but needs further studies for adaptation to burn dild. ...

Parisa Sayad; Alessandro Schönborn; Jens Klingmann

2013-04-05T23:59:59.000Z

303

Simplified configuration for the combustor of an oil burner using a low pressure, high flow air-atomizing nozzle  

DOE Patents [OSTI]

The invention relates to clean burning of fuel oil with air. More specifically, to a fuel burning combustion head using a low-pressure, high air flow atomizing nozzle so that there will be a complete combustion of oil resulting in a minimum emission of pollutants. The improved fuel burner uses a low pressure air atomizing nozzle that does not result in the use of additional compressors or the introduction of pressurized gases downstream, nor does it require a complex design. Inventors:

Butcher, Thomas A. (Port Jefferson, NY); Celebi, Yusuf (Middle Island, NY); Fisher, Leonard (Colrain, MA)

2000-09-15T23:59:59.000Z

304

Definition: Reduced Sox, Nox, And Pm-2.5 Emissions | Open Energy  

Open Energy Info (EERE)

Sox, Nox, And Pm-2.5 Emissions Sox, Nox, And Pm-2.5 Emissions Jump to: navigation, search Dictionary.png Reduced Sox, Nox, And Pm-2.5 Emissions Functions that provide this benefit can lead to avoided vehicle miles, decrease the amount of central generation needed to their serve load (through reduced electricity consumption, reduced electricity losses, more optimal generation dispatch), and or reduce peak generation. These impacts translate into a reduction in pollutant emissions produced by fossil-based electricity generators and vehicles.[1] Related Terms electricity generation, reduced electricity losses, smart grid References ↑ SmartGrid.gov 'Description of Benefits' An in LikeLike UnlikeLike You like this.Sign Up to see what your friends like. line Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Reduced_Sox,_Nox,_And_Pm-2.5_Emissions&oldid=502508

305

Demonstration of a Low-NOx Heavy-Duty Natural Gas Engine  

SciTech Connect (OSTI)

Results of a Next Generation Natural Gas Vehicle engine research project: A Caterpillar C-12 natural gas engine with Clean Air Power Dual-Fuel technology and exhaust gas recirculation demonstrated low NOx and PM emissions.

Not Available

2004-02-01T23:59:59.000Z

306

NH3 generation over commercial Three-Way Catalysts and Lean-NOx...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

formulations and operation for the in-situ generation of NH3, storage on a downstream SCR catalyst, and utilized to reduce the remaining NOx deer12toops.pdf More Documents &...

307

NOx Emissions of Alternative Diesel Fuels:? A Comparative Analysis of Biodiesel and FT Diesel  

Science Journals Connector (OSTI)

This study explores the diesel injection and combustion processes in an effort to better understand the differences in NOx emissions between biodiesel, Fischer?Tropsch (FT) diesel, and their blends with a conventional diesel fuel. Emissions studies were ...

James P. Szybist; Stephen R. Kirby; André L. Boehman

2005-05-14T23:59:59.000Z

308

Sulphur Removal Characteristics from a Commercial NOx Storage/Reduction Catalyst.  

E-Print Network [OSTI]

??The ability to effectively remove sulphur from sulphur-poisoned NOx storage/reduction (NSR) catalysts, while minimizing associated fuel penalties and thermal degradation, is important for commercial application… (more)

Kisinger, Darren

2009-01-01T23:59:59.000Z

309

A design strategy applied to sulfur resistant lean NOx̳ automotive catalysts  

E-Print Network [OSTI]

Catalyst poisoning due to sulfur compounds derived from fuel sulfur presents a major challenge, intractable thus far, to development of many advanced technologies for automotive catalysts such as the lean NOx, trap. Under ...

Tang, Hairong

2005-01-01T23:59:59.000Z

310

Monolithic Metal Oxide based Composite Nanowire Lean NOx Emission Control Catalysts  

Broader source: Energy.gov [DOE]

Presents latest progress in the development of a new type of lean NOx trapping catalyst based on heterogenous composite nanowires, which could potentially be used in gasoline and diesel engines.

311

Time and location differentiated NOX control in competitive electricity markets using cap-and-trade mechanisms  

E-Print Network [OSTI]

Due to variations in weather and atmospheric chemistry, the timing and location of nitrogen oxide (NOX) reductions determine their effectiveness in reducing ground-level ozone, which adversely impacts human health. Electric ...

Martin, Katherine C.

2007-01-01T23:59:59.000Z

312

Combining Low-Temperature Combustion with Lean-NOx Trap Yields...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Posters 2005deerhuff.pdf More Documents & Publications Intra-catalyst Reductant Chemistry in Lean NOx Traps: A Study on Sulfur Effects Reductant Utilization in a LNT + SCR...

313

Intra-catalyst Reductant Chemistry in Lean NOx Traps: A Study...  

Broader source: Energy.gov (indexed) [DOE]

Intra-catalyst Reductant Chemistry in Lean NOx Traps: A Study on Sulfur Effects Jim Parks (parksjeii@ornl.gov), Matt Swartz, Shean Huff, Brian West Oak Ridge National Laboratory...

314

NOx CONTROL OPTIONS AND INTEGRATION FOR US COAL FIRED BOILERS  

SciTech Connect (OSTI)

This is the tenth Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NO{sub x} control strategies and their possible impact on boiler performance for firing US coals. The Electric Power Research Institute (EPRI) is providing cofunding for this program. This program contains multiple tasks and good progress is being made on all fronts. During this quarter, progress was made on the computational simulation of a full-scale boiler with the purpose of understanding the potential impacts of burner operating conditions on soot and NO{sub x} generation. Sulfation tests on both the titania support and vanadia/titania catalysts were completed using BYU's in situ spectroscopy reactor this quarter. These experiments focus on the extent to which vanadia and titania sulfate in an SO{sub 2}-laden, moist environment. Construction of the CCS reactor system is essentially complete and the control hardware and software are largely in place. A large batch of vanadia/titania catalyst in powder form has been prepared for use in poisoning tests. During this quarter, minor modifications were made to the multi-catalyst slipstream reactor and to the control system. The slipstream reactor was installed at AEP's Rockport plant at the end of November 2002. In this report, we describe the reactor system, particularly the control system, which was created by REI specifically for the reactor, as well as the installation at Rockport.

Mike Bockelie; Marc Cremer; Kevin Davis; Temi Linjewile; Connie Senior; Hong-Shig Shim; Bob Hurt; Eric Eddings; Larry Baxter

2003-01-30T23:59:59.000Z

315

Application of multiple swirl burners in pilot-scale entrained bed gasifier for short residence time  

Science Journals Connector (OSTI)

Abstract The design concept of an entrained bed gasifier is presented. A 3 t/d-scale gasification system was constructed based on this concept. Syngas residence time in the gasifier was set to 2 s, relatively shorter than that of commercial gasifiers, to verify the possibility of complete gasification reaction within a short residence time. A series of gasification tests were conducted under high pressures and high temperatures. Performance data of the gasification experiment using multiple swirl burners showed that the carbon conversion and cold gas efficiency were higher than 98% and 72%, respectively. This high performance seemed to be attributable to the effects of rigorous mixing of oxygen and pulverized coal by the strong swirl flow and the relatively uniform oxygen concentration by the swirling plug flow. Syngas composition of the experimental result well agreed with that of the equilibrium state. This project demonstrated the feasibility of complete gasification reaction within a short residence time for low-rank coal of high reactivity.

Jin-Wook Lee; Yongseung Yun; Seok-Woo Chung; Suk-Hwan Kang; Jae-Hong Ryu; Gyoo-Tae Kim; Yong-Jeon Kim

2014-01-01T23:59:59.000Z

316

Syngas production from burner-stabilized methane/air flames: The effect of preheated reactants  

Science Journals Connector (OSTI)

The effect of preheated reactants on syngas production from a methane/air flame was investigated over a range of inlet temperatures up to 630 K. In addition to experimental measurements, the results from a burner-stabilized flame and freely-propagating flame models are presented. A comparison of the modeling and experimental results in terms of flame standoff distance, stability limit conditions and species yields show excellent agreement across a broad range of equivalence ratios and preheat temperatures. Preheating of reactants increased the rich limit for stable operation from 1.26 to 1.75 for a given inlet velocity, and syngas yields were shown to increase with equivalence ratio. The preheat temperature of the reactants was shown to have little impact on syngas yields beyond extending the limits of stable operation. The results of this study are useful for the design and analysis of heat recirculating reactors and other reactors that are designed for producing syngas through the combustion of rich mixtures.

Colin H. Smith; Daniel I. Pineda; Janet L. Ellzey

2013-01-01T23:59:59.000Z

317

Syngas production from liquid fuels in a non-catalytic porous burner  

Science Journals Connector (OSTI)

This paper investigates rich combustion of n-heptane, diesel oil, kerosene and rapeseed-oil methyl ester (RME) bio-diesel for the purpose of producing syngas ready for the clean-up stages for fuel-cell applications or for traditional combustor enrichment. Rich flames have been stabilised in a two-layer inert porous medium combustor and a range of equivalence ratios and porous materials have been examined. n-heptane was successfully reformed up to an equivalence ratio of 3, reaching a conversion efficiency (based on the lower heating value of H2 and CO over the fuel input) up to 75% for a packed bed of alumina beads. Similarly, diesel, kerosene and bio-diesel were reformed to syngas in a Zirconia foam burner with conversion efficiency over 60%. A preliminary attempt to reduce the content of CO and hydrocarbons in the reformate has been also conducted using commercial steam reforming and water–gas shift reaction catalysts, obtaining encouraging results. Finally, soot emission has been assessed, demonstrating particle formation for diesel oil above ? = 2, whereas bio-diesel showed the lowest soot formation tendency among all the fuels tested.

A. Pastore; E. Mastorakos

2011-01-01T23:59:59.000Z

318

Experimental study on particle characteristics in an opposed multi-burner gasifier  

Science Journals Connector (OSTI)

Abstract Based on the bench-scale opposed multi-burner (OMB) coal-water slurry (CWS) gasifier, temperature distributions of particles at different spatial regions, reactivity characteristics of particles and their interactions were studied with a variety of visualization techniques. The particles in gasifier are mainly classified to five types, and the principles of transformation between them are concluded as: low temperature particle without wake (LTP) could transform to low temperature particle with high temperature wake (LTP-HTW) when contacted with high temperature flame, then transform to LTP as reactions terminate and the particles become non-reactive; low temperature particle with low temperature wake (LTP-LTW) would transform to LTP-HTW when transfer to high temperature regions; as LTP-HTW adhere to the refractory wall, their wakes vanish and particles transform to high temperature particle without wake (HTP); high temperature particle with high temperature wake (HTP-HTW) could finally transform to HTP after the end of reactions. Particle groups with irregular shapes, flake-shaped and hollowed spherical structure are the forms of existence for larger size particles in gasifier.

Yan Gong; Guangsuo Yu; Qinghua Guo; Zhijie Zhou; Fuchen Wang; Yongdi Liu

2014-01-01T23:59:59.000Z

319

Electrochemical investigations of pitting corrosion in nitrogen-bearing type 316LN stainless steel  

SciTech Connect (OSTI)

Nitrogen (N) alloying was found to inhibit active dissolution and to introduce a secondary loop with fluctuating currents in the anodic polarization curve of type 316LN stainless steel (SS) (UNS S31653) in 1 N hydrochloric acid (HCl) solution. Potentiostatic tests in this potential range confirmed the occurrence of current transients as a result of metastable pits, resulting in secondary loop formation. Higher minimum chloride (Cl{sup {minus}}) concentration and low acidic pH were shown to be required for stable pit formation in type 316LN SS compared to similar alloys without N alloying. Results showed no selective anodic dissolution of any of the alloying elements in actively growing pits in type 316LN SS. Although ammonium ions (NH{sub 4}{sup +}) were found within pits under suitable applied potentials in 1 N HCl and under natural corrosion in ferric chloride (FECl{sub 3}) solutions, the more anodic the potential, the less was its yield. The formation of NH{sup +}{sub 2} ions was found to be greater at more active potentials under uniformly dissolving conditions, and an apparent Tafel slope for the reduction reaction N + 4H{sup +} + 3e {r_arrow}NH{sub 4}{sup +} for the dissolution of N from the steel was estimated to be 0.125 V. Significant enrichments of N, chromium (CR), and nickel (Ni) to a marginal extent were observed by Auger electron spectroscopy (AES) of the actively growing pitted surface. The iron (Fe) component, however, showed considerable depletion. The unattacked surface region surrounding the pit maintained normal passive film characteristic. Based on observations, a mechanism elaborating the beneficial effect of alloyed N on pitting corrosion resistance of SS was developed.

Palit, G.C.; Kain, V.; Gadiyar, H.S. [Bhabha Atomic Research Centre, Bombay (India). Metallurgy Div.

1993-12-01T23:59:59.000Z

320

Experimental and Kinetic Study of NOx Reduction by Reburning Using Syngas from Updraft Biomass Gasification with Phenol As a Model Compound for Tar  

Science Journals Connector (OSTI)

The reburning syngas was injected through a horizontal three-hole probe at a distance of 0.9 m from the burner exit. ... The burn-out air (OFA) was injected at a distance of 1.8 m from the burner. ... The syngas was either co-fired with coal at the burners or injected downstream as a reburning fuel under both fuel lean and conventional (fuel rich) reburning configurations. ...

Chun-yuan Liu; Ren-hao Yin; Rui-zhi Zhang; Yong-hao Luo

2012-05-03T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Advanced NOx Emissions Control: Control Technology - Second Generation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

In Situ Device for Real-Time Catalyst Deactivation Measurements in Full-Scale SCR Systems In Situ Device for Real-Time Catalyst Deactivation Measurements in Full-Scale SCR Systems To support trends in the electric generating industry of moving from seasonal to year-round operation of Selective Catalytic Reduction (SCR) for control of NOx and mercury, as well as extending the time between generating unit outages, Fossil Energy Research Corporation (FERCo) is developing technology to determine SCR catalyst activity and remaining life without requiring an outage to obtain and analyze catalyst samples. FERCo intends to use SCR catalyst performance results measured with their in situ device at Alabama PowerÂ’s Plant Gorgas during the 2005 and 2006 ozone seasons, along with EPRIÂ’s CatReactTM catalyst management software, to demonstrate the value of real-time activity measurements with respect to the optimization of catalyst replacement strategy. Southern Company and the Electric Power Research Institute are co-funding the project.

322

Release of Ammonium and Mercury from NOx Controlled Fly Ash  

SciTech Connect (OSTI)

One of the goals of the Department of Energy is to increase the reuse of coal utilization byproducts (CUB) to 50% by 2010. This will require both developing new markets and maintaining traditional ones such as the use of fly ash in concrete. However, the addition of pollution control devices can introduce side-effects that affect the marketability of the CUB. Such can be the case when NOx control is achieved using selective catalytic or non-catalytic reduction (SCR or SNCR). Depending on site-specific details, the ammonia slip can cause elevated levels of NH3 in the fly ash. Disposal of ammoniated fly ash can present environmental concerns related to the amount of ammonia that might be released, the amount of water that might become contaminated, and the extent to which metals might be mobilized by the presence of the ammonia. Ammonia retained in fly ash appears to be present as either an ammonium salt or as a chemisorbed species. Mercury in the leachates correlated to neither the amount of leachable ammonium nor to the total amount of Hg in the ash. The strongest correlation was between the decreases in the amount of Hg leached with increased LOI.

Schroeder, K.T.; Cardone, C.R.; Kim, A.G

2007-07-01T23:59:59.000Z

323

A comparative evaluation of low-cycle fatigue behavior of type 316LN base metal, 316 weld metal, and 316LN/316 weld joint  

SciTech Connect (OSTI)

A comparative evaluation of the low-cycle fatigue (LCF) behavior of type 316LN base metal, carried out at 773 and 873 K. Total strain-controlled LCF tests were conducted at a constant strain rate of 3 {times} 10{sup {minus}3} s{sup {minus}1} with strain amplitudes in the range {+-}0.20 to {+-}1.0 pct. Weld pads with single V and double V configuration were prepared by the shielded metal-arc welding (SMAW) process using 316 electrodes for weld-metal and weld-joint specimens. Optical microscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) of the untested and tested samples were carried out to elucidate the deformation and the fracture behavior. The cyclic stress response of the base metal shows a very rapid hardening to a maximum stress followed by a saturated stress response. Weld metal undergoes a relatively short initial hardening followed by a gradual softening regime. Weld joints exhibit an initial hardening and a subsequent softening regime at all strain amplitudes, except at low strain amplitudes where a saturation regime is noticed. The initial hardening observed in base metal has been attributed to interaction between dislocations and solute atoms/complexes and cyclic saturation to saturation in the number density of slip bands. The 18-8 group of austenitic stainless steels, such as AISI type 316, 304, and their modified grades, finds applications as structural material for various components of the liquid-metal-cooled fast breeder reactor (LMFBR).

Valsan, M.; Sundararaman, D.; Sankara Rao, K.B.; Mannan, S.L. [Indira Gandhi Centre for Atomic Research, Tamil Nadu (India)

1995-05-01T23:59:59.000Z

324

Glass Ceramic Waste Forms for Combined CS+LN+TM Fission Products Waste Streams  

SciTech Connect (OSTI)

In this study, glass ceramics were explored as an alternative waste form for glass, the current baseline, to be used for immobilizing alkaline/alkaline earth + lanthanide (CS+LN) or CS+LN+transition metal (TM) fission-product waste streams generated by a uranium extraction (UREX+) aqueous separations type process. Results from past work on a glass waste form for the combined CS+LN waste streams showed that as waste loading increased, large fractions of crystalline phases precipitated upon slow cooling.[1] The crystalline phases had no noticeable impact on the waste form performance by the 7-day product consistency test (PCT). These results point towards the development of a glass ceramic waste form for treating CS+LN or CS+LN+TM combined waste streams. Three main benefits for exploring glass ceramics are: (1) Glass ceramics offer increased solubility of troublesome components in crystalline phases as compared to glass, leading to increased waste loading; (2) The crystalline network formed in the glass ceramic results in higher heat tolerance than glass; and (3) These glass ceramics are designed to be processed by the same melter technology as the current baseline glass waste form. It will only require adding controlled canister cooling for crystallization into a glass ceramic waste form. Highly annealed waste form (essentially crack free) with up to 50X lower surface area than a typical High-Level Waste (HLW) glass canister. Lower surface area translates directly into increased durability. This was the first full year of exploring glass ceramics for the Option 1 and 2 combined waste stream options. This work has shown that dramatic increases in waste loading are achievable by designing a glass ceramic waste form as an alternative to glass. Table S1 shows the upper limits for heat, waste loading (based on solubility), and the decay time needed before treatment can occur for glass and glass ceramic waste forms. The improvements are significant for both combined waste stream options in terms of waste loading and/or decay time required before treatment. For Option 1, glass ceramics show an increase in waste loading of 15 mass % and reduction in decay time of 24 years. Decay times of {approx}50 years or longer are close to the expected age of the fuel that will be reprocessed when the modified open or closed fuel cycle is expected to be put into action. Option 2 shows a 2x to 2.5x increase in waste loading with decay times of only 45 years. Note that for Option 2 glass, the required decay time before treatment is only 35 years because of the waste loading limits related to the solubility of MoO{sub 3} in glass. If glass was evaluated for similar waste loadings as those achieved in Option 2 glass ceramics, the decay time would be significantly longer than 45 years. These glass ceramics are not optimized, but already they show the potential to dramatically reduce the amount of waste generated while still utilizing the proven processing technology used for glass production.

Crum, Jarrod V.; Turo, Laura A.; Riley, Brian J.; Tang, Ming; Kossoy, Anna; Sickafus, Kurt E.

2010-09-23T23:59:59.000Z

325

Understanding the Distributed Intra-Catalyst Impact of Sulfation on Water Gas Shift in a Lean NOx Trap Catalyst  

Broader source: Energy.gov [DOE]

The Lean NOx Trap catalyst is an aftertreatment technology for abatement of nitrogen-oxide emissions from lean-burn vehicle engines.

326

Pilot-Scale Aftertreatment Using Nonthermal Plasma Reduction of Adsorbed NOx in Marine Diesel-Engine Exhaust Gas  

Science Journals Connector (OSTI)

Regulations governing marine diesel engine NOx emissions have recently become more stringent. As it is difficult to fulfill these requirements by combustion improvements alone, effective aftertreatment technologi...

Takuya Kuwahara; Keiichiro Yoshida…

2014-01-01T23:59:59.000Z

327

Advanced Fuel Cycle Economic Analysis of Symbiotic Light-Water Reactor and Fast Burner Reactor Systems  

SciTech Connect (OSTI)

The Advanced Fuel Cycle Economic Analysis of Symbiotic Light-Water Reactor and Fast Burner Reactor Systems, prepared to support the U.S. Advanced Fuel Cycle Initiative (AFCI) systems analysis, provides a technology-oriented baseline system cost comparison between the open fuel cycle and closed fuel cycle systems. The intent is to understand their overall cost trends, cost sensitivities, and trade-offs. This analysis also improves the AFCI Program’s understanding of the cost drivers that will determine nuclear power’s cost competitiveness vis-a-vis other baseload generation systems. The common reactor-related costs consist of capital, operating, and decontamination and decommissioning costs. Fuel cycle costs include front-end (pre-irradiation) and back-end (post-iradiation) costs, as well as costs specifically associated with fuel recycling. This analysis reveals that there are large cost uncertainties associated with all the fuel cycle strategies, and that overall systems (reactor plus fuel cycle) using a closed fuel cycle are about 10% more expensive in terms of electricity generation cost than open cycle systems. The study concludes that further U.S. and joint international-based design studies are needed to reduce the cost uncertainties with respect to fast reactor, fuel separation and fabrication, and waste disposition. The results of this work can help provide insight to the cost-related factors and conditions needed to keep nuclear energy (including closed fuel cycles) economically competitive in the U.S. and worldwide. These results may be updated over time based on new cost information, revised assumptions, and feedback received from additional reviews.

D. E. Shropshire

2009-01-01T23:59:59.000Z

328

NOx Control Options and Integration for US Coal Fired Boilers  

SciTech Connect (OSTI)

This is the sixteenth Quarterly Technical Report for DOE Cooperative Agreement No: DEFC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NOx control strategies and their possible impact on boiler performance for boilers firing US coals. The Electric Power Research Institute (EPRI) is providing co-funding for this program. During an unplanned outage, damage occurred to the electrochemical noise corrosion probes installed at the AEP Gavin plant; testing is expected to resume in August. The KEMCOP corrosion coupons were not affected by the unplanned outage; the coupons were removed and sent for analysis. BYU conducted a series of tests before the ISSR lab was relocated. Ammonia adsorption experiments provided clear evidence of the types of acidic sites present on catalyst surfaces. Data collected this quarter indicate that surface sulfation decreases Lewis acid site concentrations for all catalysts thus far studied, confirming that catalytic activity under commercial coal-based SCR conditions occurs primarily on Br{o}nsted acid sites and would be susceptible to basic impurities such as alkali and alkaline earth oxides, chlorides, and sulfates. SCR activity tests based on MS analysis showed that increasing sulfation generally increases NO reduction activity for both 0% and 1% vanadia catalysts. During this quarter, the slipstream reactor at Rockport operated for 720 hours on flue gas. Catalyst exposure time reached 4500 hours since installation. The reactor is out of service at the Rockport plant and plans are being made to move it to the Gadsden Plant. At Gadsden, modifications have begun in preparation for installation of the slipstream reactor next quarter.

Mike Bockelie; Kevin Davis; Temi Linjewile; Connie Senior; Eric Eddings; Kevin Whitty; Larry Baxter; Calvin Bartholomew; William Hecker; Stan Harding

2004-06-30T23:59:59.000Z

329

Oil burners: Crude oil, atomization, and combustion efficiency. (Latest citations from the NTIS bibliographic database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning fuel properties and boiler operations techniques to make maximum use of heavy crude oil, shale oil, and low grade fuels to reduce energy costs in boiler firing. Fuel properties pertain to chemical constituents, viscosity, desulfurization, and processing methods to upgrade the fuels. Operating techniques include atomization, dual-fuel burners, emission characteristics, and cost factors. Combustion efficiency is examined and some citations report on additives or processing techniques to improve the efficiency. The citations also report on studies of health effects in the use of synfuels, mostly as coal liquids to replace oil. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1994-12-01T23:59:59.000Z

330

Turbulent Flame Speeds and NOx Kinetics of HHC Fuels with Contaminants and High Dilution Levels  

SciTech Connect (OSTI)

This final report documents the technical results of the 3-year project entitled, “Turbulent Flame Speeds and NOx Kinetics of HHC Fuels with Contaminants and High Dilution Levels,” funded under the NETL of DOE. The research was conducted under six main tasks: 1) program management and planning; 2) turbulent flame speed measurements of syngas mixtures; 3) laminar flame speed measurements with diluents; 4) NOx mechanism validation experiments; 5) fundamental NOx kinetics; and 6) the effect of impurities on NOx kinetics. Experiments were performed using primary constant-volume vessels for laminar and turbulent flame speeds and shock tubes for ignition delay times and species concentrations. In addition to the existing shock- tube and flame speed facilities, a new capability in measuring turbulent flame speeds was developed under this grant. Other highlights include an improved NOx kinetics mechanism; a database on syngas blends for real fuel mixtures with and without impurities; an improved hydrogen sulfide mechanism; an improved ammonia kintics mechanism; laminar flame speed data at high pressures with water addition; and the development of an inexpensive absorption spectroscopy diagnostic for shock-tube measurements of OH time histories. The Project Results for this work can be divided into 13 major sections, which form the basis of this report. These 13 topics are divided into the five areas: 1) laminar flame speeds; 2) Nitrogen Oxide and Ammonia chemical kinetics; 3) syngas impurities chemical kinetics; 4) turbulent flame speeds; and 5) OH absorption measurements for chemical kinetics.

Peterson, Eric; Krejci, Michael; Mathieu, Olivier; Vissotski, Andrew; Ravi, Sankat; Plichta, Drew; Sikes, Travis; Levacque, Anthony; Camou, Alejandro; Aul, Christopher

2013-09-30T23:59:59.000Z

331

Coal characterisation for \\{NOx\\} prediction in air-staged combustion of pulverised coals  

Science Journals Connector (OSTI)

A series of world-traded coal samples has been tested using the Imperial College high temperature wire mesh apparatus (HTWM) in order to assess the relationship between high temperature (1600°C) char nitrogen content and \\{NOx\\} formation in Hemweg Power Station (in the Netherlands) using deep furnace air staging. A linear relationship between high temperature char nitrogen and \\{NOx\\} formation has been confirmed. These results suggest that high temperature char N content is the main factor limiting \\{NOx\\} emissions with deep air-staged combustion. Char N and (hence apparently deep air-staged NOx) can be predicted with an accuracy of approximately ±20% for most coals from the coal proximate and ultimate analysis—but this might not be sufficient for stations operating close to their emission limits. Measuring high temperature char N directly reduces the likely uncertainty in deep air-staged \\{NOx\\} emissions for coals (and most blends) to approximately ±10%. Its use should be considered on a routine basis for coal selection on plants employing this technology.

C.K. Man; J.R. Gibbins; J.G. Witkamp; J. Zhang

2005-01-01T23:59:59.000Z

332

Influence of Heat Treatment on Mercury Cavitation Resistance of Surface Hardened 316LN Stainless Steel  

SciTech Connect (OSTI)

The cavitation-erosion resistance of carburized 316LN stainless steel was significantly degraded but not destroyed by heat treatment in the temperature range 500-800 C. The heat treatments caused rejection of some carbon from the carburized layer into an amorphous film that formed on each specimen surface. Further, the heat treatments encouraged carbide precipitation and reduced hardness within the carburized layer, but the overall change did not reduce surface hardness fully to the level of untreated material. Heat treatments as short as 10 min at 650 C substantially reduced cavitation-erosion resistance in mercury, while heat treatments at 500 and 800 C were found to be somewhat less detrimental. Overall, the results suggest that modest thermal excursions perhaps the result of a weld made at some distance to the carburized material or a brief stress relief treatment will not render the hardened layer completely ineffective but should be avoided to the greatest extent possible.

Pawel, Steven J [ORNL; Hsu, Julia [Massachusetts Institute of Technology (MIT)

2010-11-01T23:59:59.000Z

333

Creep of 304 LN and 316 L stainless steels at cryogenic temperatures  

SciTech Connect (OSTI)

Creep behavior of Type 304 LN plate and 316 L shielded-metal-arc (SMA)-deposited stainless weld metal was investigated at 4/sup 0/K. Testing was performed at constant load in a creep machine with a cryostat designed for long-term stability. Both transient and steady-state creep were observed during tests lasting over 2000 hours. Steady-state creep rates were much greater than expected from extrapolations of 300-K creep data. Creep rates on the order of 10/sup -10/ s/sup -1/ were observed at stresses around the yield stress for both materials. The stress exponent under these conditions if approx.2.3. Possible creep mechanisms at this temperature and the impact of these results on the design of engineering structures for long-term structural stability at cryogenic temperatures are discussed.

Roth, L.D.; Manhardt, A.E.; Dalder, E.N.C.; Kershaw, R.P. Jr.

1985-08-07T23:59:59.000Z

334

Small (5 million Btu/h) and large (300 million Btu/h) thermal test rigs for coal and coal slurry burner development  

SciTech Connect (OSTI)

NEI International Combustion Ltd. of Derby, England, now operates two thermal test rigs for the development of burners capable of handling coal-water slurries (CWS). A general description of the large rig and its capacity was given. Also, the necessary conversions of the equipment to handle CWS were described. Information on the properties of the CWS was included. This consisted of chemical analysis of the parent coal and the slurry, sieve analysis of a dry sample, and viscosity versus temperature data of the CWS. The process of design development of the burner was outlined. Ten illustrations were presented, including schematic diagrams of equipment and graphs of data.

Allen, J.W.; Beal, P.R.; Hufton, P.F.

1983-01-01T23:59:59.000Z

335

Closed-loop control of a SCR system using a NOx sensor cross-sensitive to NH3  

E-Print Network [OSTI]

Closed-loop control of a SCR system using a NOx sensor cross-sensitive to NH3 A.Bonfils , Y. Creff for an automotive selective catalytic reduction (SCR) system, for which the feedback is based on a NOx sensor the variety of en- countered technologies, selective catalytic reduction (SCR) is one of the most appealing

336

Exhaust gas fuel reforming of Diesel fuel by non-thermal arc discharge for NOx trap regeneration  

E-Print Network [OSTI]

1 Exhaust gas fuel reforming of Diesel fuel by non- thermal arc discharge for NOx trap regeneration to the reforming of Diesel fuel with Diesel engine exhaust gas using a non-thermal plasma torch for NOx trap Diesel fuel reforming with hal-00617141,version1-17May2013 Author manuscript, published in "Energy

Boyer, Edmond

337

Nitrogen Isotopic Composition of Coal-Fired Power Plant NOx: Influence of Emission Controls and Implications for Global Emission  

E-Print Network [OSTI]

Nitrogen Isotopic Composition of Coal-Fired Power Plant NOx: Influence of Emission Controls and Implications for Global Emission Inventories J. David Felix,*, Emily M. Elliott, and Stephanie L. Shaw contributions, prior documentation of 15 N of various NOx emission sources is exceedingly limited

Elliott, Emily M.

338

DURABILITY OF VERY LOW CAPACITY PRESSURE ATOMIZED FUEL NOZZLES USED WITH LOW FIRING RATE RESIDENTIAL OIL BURNERS.  

SciTech Connect (OSTI)

Brookhaven National Laboratory (BNL), working for the United States Department of Energy (DOE), has conducted a preliminary evaluation of the potential of very low fuel input capacity Simplex type pressure atomizing nozzles for use with oil burners designed for residential boilers, furnaces and water heaters. These nozzles under suitable conditions can be sufficiently reliable to enable new heating system designs. This would allow for the design of heating appliances that match the smaller load demands of energy efficient homes built with modern components and architectural systems designed to minimize energy use. When heating systems are installed with excessive capacity, oversized by three to four times the load, the result is a loss of up to ten percent as compared to the rated appliance efficiency. The use of low capacity nozzles in systems designed to closely match the load can thereby result in significant energy savings. BNL investigated the limitations of low flow rate nozzles and designed long-term experiments to see if ways could be determined that would be beneficial to long-term operation at low input capacities without failures. In order to maximize the potential for success the best possible industry practices available were employed. Low flow rate nozzles primarily fail by blockage or partial blockage of internal fuel flow passages inside the nozzle. To prevent any contaminants from entering the nozzle BNL investigated the geometry and critical dimensions and the current sate of the art of fuel filter design. Based on this investigation it was concluded that the best available filters should be more than capable of filtering contaminants from the fuel prior to entering the oil burner itself. This position was indeed validated based on the long-term trials conducted under this study no evidence resulted to change our position. It is highly recommended that these filters rated at 10 microns and with large filter capacity (surface area), should be used with all oil burner installations. The other possible failure mode had been attributed to fuel degradation and this became the main focus of the evaluation. The degradation of fuel usually occurs faster under higher temperature conditions. To preclude this as much as possible controls that provided for a post-purge of combustion airflow after burner shut down were selected. This provided a short period of time where the burner's combustion air blower continues to operate after the flame has gone out. This tends to cool the nozzle and in turn the fuel inside the small flow pathways inside the nozzle components. This study concludes that the use of low capacity nozzles is possible but only when the temperature and thermal mass environment of the combustion chamber result in a relatively ''cool'' condition. This was accomplished in one long-term experiment that essentially operated for a full heating season equivalent with no evidence of nozzle plugging or failure. The nozzle body surface temperature was kept at or below 150 F during the duration of the trial. On the other hand, a second system was studied that ended in a partial nozzle blockage and a system failure. In this ''hot environment'' system the nozzle body temperature reached 210 F. This occurred at close to a full heating season equivalent, yet it still would have resulted in a no-heat complaint by the homeowner.

MCDONALD,R.J.

2007-05-01T23:59:59.000Z

339

Gas-phase and catalytic combustion in heat-recirculating burners Jeongmin Ahn, Craig Eastwood, Lars Sitzki* and Paul D. Ronney  

E-Print Network [OSTI]

title: Extinction limits in excess enthalpy burners To be published in Proceedings of the Combustion that hydrocarbon fuels contain 100 times more energy per unit mass than lithium-ion batteries, thus devices engines may be impractical. Consequently, many groups have considered heat-recirculating, or "excess

340

Low-Emission Premixed Porous Inert Media (PIM) Burner System Fueled with Vegetable (Rapeseed) Oil Using a Flow Velocity Flame Stabilization Technique  

Science Journals Connector (OSTI)

† Mechanical Engineering Department, Faculty of Engineering and Technology, University of Tanta, Tanta, Egypt ... In the present work, the suitability of vegetable (rapeseed) oil as a renewable, biodegradable, and environmentally friendly source of energy to operate porous inert medium (PIM) atmospheric burners was examined. ...

Ayman Bakry; A. Al-Salaymeh; Ala H. Al-Muhtaseb; A. Abu-Jrai; D. Trimis; F. Durst

2009-10-29T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

NOx Control Options and Integration for US Coal Fired Boilers  

SciTech Connect (OSTI)

This is the fifteenth Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT40753. The goal of the project is to develop cost effective analysis tools and techniques for demonstrating and evaluating low NOx control strategies and their possible impact on boiler performance for boilers firing US coals. The Electric Power Research Institute (EPRI) is providing co-funding for this program. At AEP's Gavin Plant, data from the corrosion probes showed that corrosion rate increased as boiler load was increased. During an outage at the plant, the drop in boiler load, sensor temperature and corrosion rate could all be seen clearly. Restarting the boiler saw a resumption of corrosion activity. This behavior is consistent with previous observations made at a 600MWe utility boiler. More data are currently being examined for magnitudes of corrosion rates and changes in boiler operating conditions. Considerable progress was made this quarter in BYU's laboratory study of catalyst deactivation. Surface sulfation appears to partially suppress NO adsorption when the catalyst is not exposed to NH3; NH3 displaces surface-adsorbed NO on SCR catalysts and surface sulfation increases the amount of adsorbed NH3, as confirmed by both spectroscopy and TPD experiments. However, there is no indication of changes in catalyst activity despite changes in the amount of adsorbed NH3. A monolith test reactor (MTR), completed this quarter, provided the first comparative data for one of the fresh and field-exposed monolith SCR catalysts yet developed in this project. Measurements of activity on one of the field-exposed commercial monolith catalysts do not show significant changes in catalyst activity (within experimental error) as compared to the fresh catalyst. The exposed surface of the sample contains large amounts of Ca and Na, neither of which is present in the fresh sample, even after removal of visibly obvious fouling deposits. However, these fouling compounds do not deactivate the catalyst to the extent that these same poisons do in the deliberately wet-impregnated laboratory-prepared samples (1%V{sub 2}O{sub 5}-9%WO{sub 3}/TiO{sub 2}). At least in this case, the fouling deposits generated by field exposure present little if any chemical deactivation or barrier to mass transfer. During this quarter, the slipstream reactor at Rockport operated for 1000 hours on flue gas. Periodic NO{sub x} reduction measurements were made, showing some decrease in activity relative to fresh catalyst samples. Plans are being made to take the reactor out of service at the Rockport plant and move it to Plant Gadsden. At Gadsden, inlet and outlet ports were installed on Unit 1 for the slipstream reactor during an outage.

Mike Bockelie; Kevin Davis; Temi Linjewile; Connie Senior; Eric Eddings; Kevin Whitty; Larry Baxter; Calvin Bartholomew; William Hecker; Stan Harding

2004-03-31T23:59:59.000Z

342

Influence of combustion parameters on NOx production in an industrial boiler  

E-Print Network [OSTI]

Influence of combustion parameters on NOx production in an industrial boiler M.A. Habib a,*, M pollution using a model furnace of an industrial boiler utilizing fuel gas. The importance of this problem is mainly due to its relation to the pollutants produced by large boiler furnaces used widely in thermal

Aldajani, Mansour A.

343

REAL-WORLD EFFICACY OF HEAVY DUTY DIESEL TRUCK NOX AND PM EMISSIONS CONTROLS  

E-Print Network [OSTI]

are International. b DOC = Diesel Oxidation Catalyst; DPF = Diesel Particulate Filter; EGR = Exhaust GasREAL-WORLD EFFICACY OF HEAVY DUTY DIESEL TRUCK NOX AND PM EMISSIONS CONTROLS Gurdas Sandhu H 26-28, 2012 #12;2 Objectives 1. Quantify inter-run variability in exhaust emission rates 2. Assess

Frey, H. Christopher

344

Consequences of propene and propane on plasma remediation of NOx Rajesh Doraia)  

E-Print Network [OSTI]

. INTRODUCTION Plasma remediation of exhaust from internal combustion engines, and diesel engines in particular of achieving high E/N electric field/ gas number density are promising in this regard.11 Actual diesel exhaust discharge DBD reactors are being investigated for plasma remediation of NOx from the exhaust of internal

Kushner, Mark

345

tive emissions from EVs (e.g., power plant NOx) and GPVs (tailpipe and  

E-Print Network [OSTI]

a few sluggish electric vehicles would cause enough traffic slowing that the gasoline- powered fleet Analy- sis article on battery-powered vehicles (Sept. 1996, p. 402A) serves as a useful remindertive emissions from EVs (e.g., power plant NOx) and GPVs (tailpipe and associated NO.,. emissions

Denver, University of

346

Observation of NOx enhancement and ozone depletion in the Northern and Southern  

E-Print Network [OSTI]

Clarmann, G. P. Stiller, M. Ho¨pfner, S. Kellmann, and H. Fischer Institut fu¨r Meteorologie und Clarmann, G. P. Stiller, M. Ho¨pfner, S. Kellmann, H. Fischer, and C. H. Jackman (2005), Observation of NOx

Jackman, Charles H.

347

Atmospheric Environment 38 (2004) 27792787 First detection of nitrogen from NOx in tree rings: a 15  

E-Print Network [OSTI]

abies; Air pollution; Dendroecology; Nitrogen deposition; Stable isotopes; Nitrogen dioxide 1Atmospheric Environment 38 (2004) 2779­2787 First detection of nitrogen from NOx in tree rings 2004; accepted 27 February 2004 Abstract Nitrogen isotope analysis (d15 N) of tree rings is potentially

348

Transport of NOx in East Asia identified by satellite and in situ measurements  

E-Print Network [OSTI]

Research Laboratory, Boulder, Colorado, USA, 3 Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado, USA, 4 School of Earth and Environmental Sciences, Seoul burning, and natural phenomena like lightning, wildfires, and soil microbial activity. NOx play

Park, Rokjin

349

NOx reduction with the use of feedlot biomass as a reburn fuel  

E-Print Network [OSTI]

. Additional air called overfire air (about 20 % of total air) is injected in order to complete combustion. Typically reburn fuel is natural gas (NG). From previous research at TAMU, it was found that firing feedlot biomass (FB) as reburn fuel lowers the NOx...

Goughnour, Paul Gordon

2009-05-15T23:59:59.000Z

350

Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS:  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS: Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS: products, effect of UV irradiation, water and coadsorbed K+ Title Chemistry of NOx on TiO2 surfaces studied by ambient pressure XPS: products, effect of UV irradiation, water and coadsorbed K+ Publication Type Journal Article Year of Publication 2013 Authors Rosseler, Olivier, Mohamad Sleiman, Nahuel V. Montesinos, Andrey Shavorskiy, Valerie Keller, Nicolas Keller, Marta I. Litter, Hendrik Bluhm, Miquel Salmeron, and Hugo Destaillats Journal J. Phys. Chem. Lett. Volume 4 Start Page 536 Issue 3 Pagination 536-541 Date Published 01/2013 Abstract Self-cleaning surfaces containing TiO2 nanoparticles have been postulated to efficiently remove NOx from the atmosphere. However, UV irradiation of NOx adsorbed on TiO2 also was shown to form harmful gas-phase byproducts such as HONO and N2O that may limit their depolluting potential. Ambient pressure XPS was used to study surface and gas-phase species formed during adsorption of NO2 on TiO2 and subsequent UV irradiation at λ = 365 nm. It is shown here that NO3-, adsorbed on TiO2 as a byproduct of NO2 disproportionation, was quantitatively converted to surface NO2 and other reduced nitrogenated species under UV irradiation in the absence of moisture. When water vapor was present, a faster NO3- conversion occurred, leading to a net loss of surface-bound nitrogenated species. Strongly adsorbed NO3- in the vicinity of coadsorbed K+ cations was stable under UV light, leading to an efficient capture of nitrogenated compounds.

351

SOx-NOx-Rox Box{trademark} flue gas clean-up demonstration. Final report  

SciTech Connect (OSTI)

Babcock and Wilcox`s (B and W) SOx-NOx-Rox Box{trademark} process effectively removes SOx, NOx and particulate (Rox) from flue gas generated from coal-fired boilers in a single unit operation, a high temperature baghouse. The SNRB technology utilizes dry sorbent injection upstream of the baghouse for removal of SOx and ammonia injection upstream of a zeolitic selective catalytic reduction (SCR) catalyst incorporated in the baghouse to reduce NOx emissions. Because the SOx and NOx removal processes require operation at elevated gas temperatures (800--900 F) for high removal efficiency, high-temperature fabric filter bags are used in the baghouse. The SNRB technology evolved from the bench and laboratory pilot scale to be successfully demonstrated at the 5-MWe field scale. This report represents the completion of Milestone M14 as specified in the Work Plan. B and W tested the SNRB pollution control system at a 5-MWe demonstration facility at Ohio Edison`s R.E. Burger Plant located near Shadyside, Ohio. The design and operation were influenced by the results from laboratory pilot testing at B and W`s Alliance Research Center. The intent was to demonstrate the commercial feasibility of the SNRB process. The SNRB facility treated a 30,000 ACFM flue gas slipstream from Boiler No. 8. Operation of the facility began in May 1992 and was completed in May 1993. About 2,300 hours of high-temperature operation were achieved. The main emissions control performance goals of: greater than 70% SO{sub 2} removal using a calcium-based sorbent; greater than 90% NOx removal with minimal ammonia slip; and particulate emissions in compliance with the New Source Performance Standards (NSPS) of 0.03 lb/million Btu were exceeded simultaneously in the demonstration program when the facility was operated at optimal conditions. Testing also showed significant reductions in emissions of some hazardous air pollutants.

NONE

1995-09-01T23:59:59.000Z

352

CO2 Gasification Rates of Petroleum Coke in a Pressurized Flat-Flame Burner Entrained-Flow Reactor  

Science Journals Connector (OSTI)

Two petcoke samples were gasified by CO2 at total pressures of 10 and 15 atm in a high-pressure flat-flame burner reactor at conditions where the bulk phase consisted of either 40 or 90 mol % CO2 with gas temperatures up to 1909 K. Particle diameters of 45–75 ?m were used in the experiments. ... The mass release data caused by CO2 gasification of the petcoke chars were fit to a global first-order model, and the optimal kinetic parameters are reported. ... The CO2 char gasification rates of both petcokes were shown to be higher than Illinois #6 coal when reacted at conditions of high temperature and pressure, even though most reactivity comparisons between petcoke and coal at lower temperature, pressure, and heating rates typically result in coal being more reactive. ...

Aaron D. Lewis; Emmett G. Fletcher; Thomas H. Fletcher

2014-06-05T23:59:59.000Z

353

Oil burners: Crude oil, atomization, and combustion efficiency. (Latest citations from the NTIS bibliographic database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning fuel properties and boiler operations techniques to make maximum use of heavy crude oil, shale oil, and low grade fuels to reduce energy costs in boiler firing. Fuel properties pertain to chemical constituents, viscosity, desulfurization, and processing methods to upgrade the fuels. Operating techniques include atomization, dual-fuel burners, emission characteristics, and cost factors. Combustion efficiency is examined and some citations report on additives or processing techniques to improve the efficiency. The citations also report on studies of health effects in the use of synfuels, mostly as coal liquids to replace oil. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

NONE

1996-03-01T23:59:59.000Z

354

Oil burners: Crude oil, atomization, and combustion efficiency. (Latest citations from the NTIS bibliographic database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning fuel properties and boiler operations techniques to make maximum use of heavy crude oil, shale oil, and low grade fuels to reduce energy costs in boiler firing. Fuel properties pertain to chemical constituents, viscosity, desulfurization, and processing methods to upgrade the fuels. Operating techniques include atomization, dual-fuel burners, emission characteristics, and cost factors. Combustion efficiency is examined and some citations report on additives or processing techniques to improve the efficiency. The citations also report on studies of health effects in the use of synfuels, mostly as coal liquids to replace oil. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

NONE

1997-06-01T23:59:59.000Z

355

Effects of Out-of-Plane Disorder on the Nodal Quasiparticle and Superconducting Gap in Single-Layer Bi_2Sr_1.6Ln_0.4CuO_6 delta (Ln = La, Nd, Gd)  

SciTech Connect (OSTI)

How out-of-plane disorder affects the electronic structure has been investigated for the single-layer cuprates Bi{sub 2}Sr{sub 1.6}Ln{sub 0.4}CuO{sub 6+{delta}} (Ln = La, Nd, Gd) by angle-resolved photoemission spectroscopy. We have observed that, with increasing disorder, while the Fermi surface shape and band dispersions are not affected, the quasi-particle width increases, the anti-nodal gap is enhanced and the superconducting gap in the nodal region is depressed. The results indicate that the superconductivity is significantly depressed by out-of-plane disorder through the enhancement of the anti-nodal gap and the depression of the superconducting gap in the nodal region.

Hashimoto, M.

2011-01-04T23:59:59.000Z

356

On the Promoting Effect of Water during NOx Removal over Single-Site Copper in Hydrophobic Silica APD-Aerogels  

Science Journals Connector (OSTI)

Reversibility of the Cu2+/Cu+ redox pair was confirmed in the Cu-aerogel during and after wet redox cycling. ... (1) Popular solutions to selective catalytic reduction of NOx include the use of exhaust hydrocarbon residuals (SCR-HC-deNOx) or ammonia added to the exhaust (SCR-NH3-deNOx) as the reductant; the former technology being suitable for light duty passenger vehicles, whereas the latter is applied to medium or heavy duty vehicles. ... During vehicle use, the converter is exposed to heat, which causes the metal particles to agglomerate and grow, and their overall surface area to decrease. ...

Tina Kristiansen; Karina Mathisen

2014-01-10T23:59:59.000Z

357

NETL: Clean Coal Technology Demonstration Program (CCTDP) - Round 3  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Full-Scale Demonstration of Low-NOx Cell Burner Retrofit - Project Brief [PDF-294KB] Full-Scale Demonstration of Low-NOx Cell Burner Retrofit - Project Brief [PDF-294KB] The Babcock & Wilcox Company, Aberdeen, OH PROGRAM PUBLICATIONS Final Reports Full-Scale Demonstration of Low-NOx Cell Burner Retrofit, Final Report [PDF-3.6MB] (July 1994) CCT Reports: Project Performance Summaries, Post-Project Assessments, & Topical Reports Full-Scale Demonstration of Low-NOx Cell Burner Retrofit, Project Performance Summary [PDF-1.18MB] (June 1999) Full-Scale Demonstration of Low-NOx Cell Burner Retrofit: A DOE Assessment [PDF-1.1MB] (Nov 2000) Reducing Emissions of Nitrogen Oxides via Low-NOx Burner Technologies, Topical Report No. 5 [PDF-825KB] (Sept 1996) Design Reports Full-Scale Demonstration of Low-NOx Cell Burner Retrofit, Public Design Report [PDF-2.68MB] (Aug 1991)

358

A Fundamental Consideration on NOx Adsorber Technology for DI Diesel Application  

SciTech Connect (OSTI)

Diesel engines are far more efficient than gasoline engines of comparable size, and emit less greenhouse gases that have been implicated in global warming. In 2000, the US EPA proposed very stringent emissions standards to be introduced in 2007 along with low sulfur (< 15 ppm) diesel fuel. The California Air Resource Board (CARB) has also established the principle that future diesel fueled vehicles should meet the same low emissions standards as gasoline fueled vehicles and the EPA followed suit with its Tier II emissions regulation. Achieving such low emissions cannot be done through engine development and fuel reformulation alone, and requires application of NOx and particulate matter (PM) aftertreatment control devices. There is a widespread consensus that NOx adsorbers and particulate filter are required in order for diesel engines to meet the 2007 emissions regulations for NOx and PM. In this paper, the key exhaust characteristics from an advanced diesel engine are reviewed. Development of the NOx adsorber technology is discussed. Spectroscopic techniques are applied to understand the underlying chemical reactions over the catalyst surface during NOx trapping and regeneration periods. In-situ surface probes are useful in providing not only thermodynamic and kinetics information required for model development but also a fundamental understanding of storage capacity and degradation mechanisms. The distribution of various nitration/sulfation species is related to surface basicity. Surface displacement reactions of carbonates also play roles in affecting the trapping capability of NOx adsorbers. When ultralow-S fuel is used as a reductant during the regeneration, sulfur induced performance degradation is still observed in an aged catalyst. Other possible sources related to catalyst deactivation include incomplete reduction of surface nitration, coke formation derived from incomplete hydrocarbon burning, and lubricant formulations. Sulfur management and the direction of future work for the successful implementation of such integrated engine and aftertreatment technology are discussed. SAE Paper SAE-2002-01-2889 {copyright} 2002 SAE International. This paper is published on this website with permission from SAE International. As a user of this website, you are permitted to view this paper on-line, download this pdf file and print one copy of this paper at no cost for your use only. The downloaded pdf file and printout of this SAE paper may not be copied, distributed or forwarded to others or for the use of others.

Fang, Howard L.; Huang, Shyan C.; Yu, Robert C. (Cummins, Inc.); Wan, C. Z. (Engelhard Corp.); Howden, Ken (U.S. Dept. of Energy)

2002-10-01T23:59:59.000Z

359

HYDROGEN GENERATION FROM PLASMATRON REFORMERS: A PROMISING TECHNOLOGY FOR NOX ADSORBER REGENERATION AND OTHER AUTOMOTIVE APPLICATIONS  

SciTech Connect (OSTI)

Plasmatron reformers are being developed at MIT and ArvinMeritor [1]. In these reformers a special low power electrical discharge is used to promote partial oxidation conversion of hydrocarbon fuels into hydrogen and CO. The partial oxidation reaction of this very fuel rich mixture is difficult to initiate. The plasmatron provides continuous enhanced volume initiation. To minimize electrode erosion and electrical power requirements, a low current, high voltage discharge with wide area electrodes is used. The reformers operate at or slightly above atmospheric pressure. Plasmatron reformers provide the advantages of rapid startup and transient response; efficient conversion of the fuel to hydrogen rich gas; compact size; relaxation or elimination of reformer catalyst requirements; and capability to process difficult to reform fuels, such as diesel and bio-oils. These advantages facilitate use of onboard hydrogen-generation technology for diesel exhaust after-treatment. Plasma-enhanced reformer technology can provide substantial conversion even without the use of a catalyst. Recent progress includes a substantial decrease in electrical power consumption (to about 200 W), increased flow rate (above 1 g/s of diesel fuel corresponding to approximately 40 kW of chemical energy), soot suppression and improvements in other operational features.. Plasmatron reformer technology has been evaluated for regeneration of NOx adsorber after-treatment systems. At ArvinMeritor tests were performed on a dual-leg NOx adsorber system using a Cummins 8.3L diesel engine both in a test cell and on a vehicle. A NOx adsorber system was tested using the plasmatron reformer as a regenerator and without the reformer i.e., with straight diesel fuel based regeneration as the baseline case. The plasmatron reformer was shown to improve NOx regeneration significantly compared to the baseline diesel case. The net result of these initial tests was a significant decrease in fuel penalty, roughly 50% at moderate adsorber temperatures. This fuel penalty improvement is accompanied by a dramatic drop in slipped hydrocarbon emissions, which decreased by 90% or more. Significant advantages are demonstrated across a wide range of engine conditions and temperatures. The study also indicated the potential to regenerate NOx adsorbers at low temperatures where diesel fuel based regeneration is not effective, such as those typical of idle conditions. Two vehicles, a bus and a light duty truck, have been equipped for plasmatron reformer NOx adsorber regeneration tests.

Bromberg, L.; Crane, S; Rabinovich, A.; Kong, Y; Cohn, D; Heywood, J; Alexeev, N.; Samokhin, A.

2003-08-24T23:59:59.000Z

360

Evaluation of Iron Aluminide Weld Overlays for Erosion-Corrosion Resistant Boiler Tube Coatings in Low NOx Boilers  

SciTech Connect (OSTI)

Iron aluminide weld overlays containing ternary additions and thermal spray coatings are being investigated for corrosion protection of boiler tubes in Low NO{sub x} burners. The primary objective of the research is to identify overlay and thermal spray compositions that provide corrosion protection of waterwall boiler tubes.

Regina, J.R.; Lim, M.; Barbosa, N., DuPont, J.N.; Marder, A.R.

2000-04-28T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Effects of Fuel-Side Nitrogen Dilution on Structure and NOx Formation of Turbulent Syngas Non-premixed Jet Flames  

Science Journals Connector (OSTI)

In this syngas non-premixed burner, the nozzle inner and outer diameters are 7.72 mm and 9.46 mm, respectively. ... Prathap, C.; Ray, A.; Ravi, M. R.Investigation of nitrogen dilution effects on laminar burning velocity and flame stability of syngas fuel at atmospheric condition Combust. ...

Jeongwon Lee; Sangwoon Park; Yongmo Kim

2012-05-01T23:59:59.000Z

362

An Analysis of the health impacts from PM and NOx emissions resulting from train operations in the Alameda Corridor, CA  

E-Print Network [OSTI]

2009). Estimating PM and NOx Train Emissions in the AlamedaAuthority. Number of Trains Running on the Alameda Corridor.x emissions resulting from train operations in the Alameda

Sangkapichai, Mana; Saphores, Jean-Daniel M; Ogunseitan, Oladele; Ritchie, Stephen G.; You, Soyoung Iris; Lee, Gunwoo

2010-01-01T23:59:59.000Z

363

Heavy-duty diesel vehicle Nox? aftertreatment in 2010 : the infrastructure and compliance challenges of urea-SCR  

E-Print Network [OSTI]

Increasingly stringent heavy-duty vehicle emission regulations are prompting the use of PM and NOx aftertreatment systems in the US, the EU and Japan. In the US, the EPA Highway Diesel Rule, which will be fully implemented ...

Bodek, Kristian M

2008-01-01T23:59:59.000Z

364

Cold-Start Emissions Control in Hybrid Vehicles Equipped with a Passive Adsorber for Hydrocarbons and NOx  

Broader source: Energy.gov [DOE]

Reports results from study of potential for using chemisorbing materials to temporally trap HC and NOx emissions during cold-start of HEVs and PHEVs over transient driving cycles

365

NOx Emissions Reductions from Implementation of the 2000 IECC/IRC Conservation Code to Residential Construction in Texas  

E-Print Network [OSTI]

.1000 0.1500 0.2000 0.2500 0.3000 0.3500 0.4000 0.0000 0.0500 0.1000 0.1500 0.2000 0.2500 0.3000 0.3500 0.4000 To ns - NOx/day (average) Tons - NOX/day (p eak) Apx 2x difference 1:1 2...

Haberl, J. S.; Im, P.; Culp, C.; Yazdani, B.; Fitzpatrick, T.

2004-01-01T23:59:59.000Z

366

Application of Taguchi's orthogonal array in reducing the NOx emission of a stationary diesel engine  

Science Journals Connector (OSTI)

The main objective of this investigation is to reduce the NOx emission of a stationary diesel engine with less sacrifice on smoke intensity and brake thermal efficiency (BTE). Fuel injection timing, percentage of EGR and fuel injection pressure are chosen as factors influencing the objective. Three levels were chosen in each factor and design of experiments method was employed to design the experiments. Taguchi's L9 orthogonal array was used to conduct the engine tests with different levels of the chosen factors. Test results were analysed by analysis of variance (ANOVA) method and ANOVA table was formed for each response variable. From the ANOVA table the most influencing factor and also the significance of each factor affecting the NOx emission, smoke intensity and BTE was found out. Response graph was drawn for each response variable to determine the optimum combination of the factor levels. This optimum combination was confirmed experimentally. [Received: November 14, 2010; Accepted: March 17, 2011

S. Saravanan; G. Nagarajan; R. Ramanujam; S. Sampath

2011-01-01T23:59:59.000Z

367

A decoupled approach for NOx–N2O 3-D CFD modeling in CFB plants  

Science Journals Connector (OSTI)

Abstract In this study, a 3D CFD model for the formation of \\{NOx\\} and N2O in a lignite fired 1.2 MWth CFB pilot plant is developed. The decoupled approach (decoupled from combustion simulation) is tested for the minimization of computational cost. As combustion simulation is prerequired, this was achieved through a simplified 3-D CFD combustion model. The developed model is then applied to the pilot-scale 1.2 MWth CFB plant and validated against experimental data. As concerns the NOx–N2O model, an extensive literature review is also carried out for the incorporation of the appropriate reactions network and respective reaction rates expressions. Results show that homogenous reactions are favoured on the lower section of the bed, due to the abundance of fuel devolatilization products. On the other hand, on the upper section, heterogeneous reactions govern nitric oxide formation/reduction. It is found that for the lignite examined in this work, HCN is released in negligible amounts during char combustion. The proposed and validated CFD model for \\{NOx\\} and N2O, is capable of examining the effect of different operational parameters and coal properties on the overall nitric oxides emissions from a CFB combustor, with low computational cost and without the additional expenses for pilot-scale experiments.

A. Nikolopoulos; I. Malgarinos; N. Nikolopoulos; P. Grammelis; S. Karrelas; E. Kakaras

2014-01-01T23:59:59.000Z

368

Ammonia Generation over TWC for Passive SCR NOX Control for Lean Gasoline Engines  

SciTech Connect (OSTI)

A commercial three-way catalyst (TWC) was evaluated for ammonia (NH3) generation on a 2.0-liter BMW lean burn gasoline direct injection engine as a component in a passive ammonia selective catalytic reduction (SCR) system. The passive NH3 SCR system is a potential low cost approach for controlling nitrogen oxides (NOX) emissions from lean burn gasoline engines. In this system, NH3 is generated over a close-coupled TWC during periodic slightly rich engine operation and subsequently stored on an underfloor SCR catalyst. Upon switching to lean, NOX passes through the TWC and is reduced by the stored NH3 on the SCR catalyst. NH3 generation was evaluated at different air-fuel equivalence ratios at multiple engine speed and load conditions. Near complete conversion of NOX to NH3 was achieved at =0.96 for nearly all conditions studied. At the =0.96 condition, HC emissions were relatively minimal, but CO emissions were significant. Operation at AFRs richer than =0.96 did not provide more NH3 yield and led to higher HC and CO emissions. Results of the reductant conversion and consumption processes were used to calculate a representative fuel consumption of the engine operating with an ideal passive SCR system. The results show a 1-7% fuel economy benefit at various steady-state engine speed and load points relative to a stoichiometric engine operation.

Prikhodko, Vitaly Y [ORNL] [ORNL; Parks, II, James E [ORNL; Pihl, Josh A [ORNL] [ORNL; Toops, Todd J [ORNL] [ORNL

2014-01-01T23:59:59.000Z

369

Modeling Species Inhibition of NO oxidation in Urea-SCR Catalysts for Diesel Engine NOx Control  

SciTech Connect (OSTI)

Urea-selective catalytic reduction (SCR) catalysts are regarded as the leading NOx aftertreatment technology to meet the 2010 NOx emission standards for on-highway vehicles running on heavy-duty diesel engines. However, issues such as low NOx conversion at low temperature conditions still exist due to various factors, including incomplete urea thermolysis, inhibition of SCR reactions by hydrocarbons and H2O. We have observed a noticeable reduction in the standard SCR reaction efficiency at low temperature with increasing water content. We observed a similar effect when hydrocarbons are present in the stream. This effect is absent under fast SCR conditions where NO ~ NO2 in the feed gas. As a first step in understanding the effects of such inhibition on SCR reaction steps, kinetic models that predict the inhibition behavior of H2O and hydrocarbons on NO oxidation are presented in the paper. A one-dimensional SCR model was developed based on conservation of species equations and was coded as a C-language S-function and implemented in Matlab/Simulink environment. NO oxidation and NO2 dissociation kinetics were defined as a function of the respective adsorbate’s storage in the SCR catalyst. The corresponding kinetic models were then validated on temperature ramp tests that showed good match with the test data.

Devarakonda, Maruthi N.; Tonkyn, Russell G.; Tran, Diana N.; Lee, Jong H.; Herling, Darrell R.

2010-09-15T23:59:59.000Z

370

Modeling Species Inhibition of NO Oxidation in Urea-SCR Catalysts for Diesel Engine NOx Control  

SciTech Connect (OSTI)

Urea-selective catalytic reduction (SCR) catalysts are regarded as the leading NOx aftertreatment technology to meet the 2010 NOx emission standards for on-highway vehicles running on heavy-duty diesel engines. However, issues such as low NOx conversion at low temperature conditions still exist due to various factors, including incomplete urea thermolysis, inhibition of SCR reactions by hydrocarbons and H2O. We have observed a noticeable reduction in the standard SCR reaction efficiency at low temperature with increasing water content. We observed a similar effect when hydrocarbons are present in the stream. This effect is absent under fast SCR conditions where NO ~ NO2 in the feed gas. As a first step in understanding the effects of such inhibition on SCR reaction steps, kinetic models that predict the inhibition behavior of H2O and hydrocarbons on NO oxidation are presented in the paper. A one-dimensional SCR model was developed based on conservation of species equations and was coded as a C-language S-function and implemented in Matlab/Simulink environment. NO oxidation and NO2 dissociation kinetics were defined as a function of the respective adsorbate’s storage in the Fe-zeolite SCR catalyst. The corresponding kinetic models were then validated on temperature ramp tests that showed good match with the test data. Such inhibition models will improve the accuracy of model based control design for integrated DPF-SCR aftertreatment systems.

Devarakonda, Maruthi N.; Tonkyn, Russell G.; Tran, Diana N.; Lee, Jong H.; Herling, Darrell R.

2011-04-20T23:59:59.000Z

371

Evaluation of gas-reburning and low NO{sub x} burners on a wall fired boiler. Technical progress report No. 5, October 1--December 31, 1991  

SciTech Connect (OSTI)

Low NO{sub x} burners operate on the principle of delayed mixing between the coal fuel and burner air, so that less NO{sub x} is formed. Gas reburning is a combustion modification technique that consists of firing 80--85 percent of the fuel corresponding to the total heat release in the lower furnace. Reduction of NO{sub x} to molecular nitrogen (N{sub 2}) is accomplished via the downstream injection of the remaining fuel requirement in the form of natural gas (which also reduces the total SO{sub x} emissions). In a third stage, burnout air is injected at the lower temperatures in the upper furnace to complete the combustion process without generating significant additional NO{sub x}. The specific goal of this project is to demonstrate NO{sub x} emission reductions of 75 percent or more as a result of combing Low NO{sub x} Burners and Gas Reburning on a utility boiler having the design characteristics mentioned above. A Host Site Agreement has been signed by EER and a utility company in the State of Colorado: Public Service Company of Colorado (Cherokee Unit No. 3, 172 MW{sub e}) front wall fired boiler near Denver.

Not Available

1992-01-15T23:59:59.000Z

372

Operational results of a low NO{sub x} burner retrofit on a 780 net MW{sub e} PC-fired utility boiler  

SciTech Connect (OSTI)

The primary objective of this project was to comply with state and federal clean air regulations while maintaining operational flexibility and control. This objective was accomplished with the installation of DRB-XCL{reg_sign} burners with a separated overfire air system. The DRB-XCL{reg_sign} burners can consistently achieve 0.5 lbs/10{sup 6} Btu NO{sub x} or less. Even lower NO{sub x} levels can be achieved with the new equipment. However, increased carbon levels affecting stack opacity prevent long-term operation at this level with the existing scrubbing equipment. Final test results indicated that the project goals were met with some exceeded. The results of this project pointed out the numerous interactions of all of the interrelated complex systems in today`s state-of-the-art power plants. The increase in unburned carbon levels affected the wet scrubber and impacted stack plume color. Being one indicator of inefficiency, this item is currently being reviewed to take advantage of further improving operating efficiency. Mechanical reliability of the Babcock & Wilcox DRB-XCL{reg_sign} burner has been good and it is estimated that long-term maintenance costs will be low. Close cooperation between Ohio Edison and B&W contributed positively to the success of this project.

Bryk, S.A.; Cioffi, P.L.; Tucker, T.J. [Babcock & Wilcox, Barberton, OH (United States); Mellody, J.G. [Ohio Edison Co., Akron, OH (United States); Hooks, M.E. [Pennsylvania Power Co., Shippingport, PA (United States)

1995-12-31T23:59:59.000Z

373

Synthesis, structural characterization and Mössbauer study of LnV{sub 0.5}Fe{sub 0.5}O{sub 3} perovskites (Ln = Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er)  

SciTech Connect (OSTI)

Graphical abstract: Mössbauer spectra taken at 200 K for the Y(V{sub 0.5}Fe{sub 0.5})O{sub 3} orthoferrivanadate synthesized by arc-melting. Highlights: ? LnFe{sub 0.5}V{sub 0.5}O{sub 3} were synthesized by the first time for most of the rare-earth elements. ? These orthoferrivanadates crystallize metastably with the perovskite structure. ? Iron and vanadium are trivalent stabilized in these solid solutions. ? The Mössbauer quadrupolar splitting is correlated with the tolerance factor. ? Below 100 K, these perovskites undergo a crystallographic phase transformation. -- Abstract: Perovskites LnV{sub 0.5}Fe{sub 0.5}O{sub 3} (Ln = Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er) were synthesized by rapid solidification from arc-melted samples and characterized by the study of their crystal structure and hyperfine properties. These metastable solid solutions crystallized in the Pbnm symmetry, with the iron and vanadium cations randomly distributed in the transition metal octahedral sites. Depending on the lanthanide present at the A site of the perovskite, iron is present with two valences (i.e., Fe{sup 3+} and Fe{sup 2+}). The volume of the unit cell for these perovskites increases linearly with the lanthanide ionic radius, as the perovskite approaches its ideal structure. At room temperature, the quadrupolar splitting of the trivalent paramagnetic Mössbauer component works as an indirect measurement for the Goldshmidt tolerance factor. Close to or below 100 K, these perovskites undergo a crystallographic phase transformation, probably due to orbital ordering of the V{sup 3+} cations, originating two different magnetic iron sites.

Ivashita, Flávio F.; Biondo, Valdecir; Bellini, Jusmar V.; Paesano, Andrea [Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, 87.020-900 Maringá, PR (Brazil)] [Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, 87.020-900 Maringá, PR (Brazil); Blanco, M. Cecilia; Fuertes, Valeria C.; Pannunzio-Miner, Elisa V. [INFIQC-CONICET, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba (Argentina)] [INFIQC-CONICET, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba (Argentina); Carbonio, Raúl E., E-mail: carbonio@fcq.unc.edu.ar [INFIQC-CONICET, Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba (Argentina)

2012-09-15T23:59:59.000Z

374

\\{NOx\\} emission characteristics of fluidized bed combustion in atmospheres rich in oxygen and water vapor for high-nitrogen fuel  

Science Journals Connector (OSTI)

Abstract The present study examines the influence of water vapor in combustion atmosphere on \\{NOx\\} emission from oxygen-enriched combustion of air-dried distilled spirit lees and its char in a laboratory fluidized bed of 760 mm high and 68 mm in inner diameter. Steam was added into the fluidizing gas to vary the vapor content in the combustion atmosphere. At a combustion temperature of 950 °C and a steam-to-fuel mass ratio (S/F) of 0.5, the presence of water vapor reduced the \\{NOx\\} concentration in the flue gas for low O2 contents (?30 vol.%) in the combustion agent but increased the \\{NOx\\} emission for high O2 contents (?40 vol.%). The possible causes were clarified for this shift from suppression to promotion of fuel-N conversion into \\{NOx\\} with raising O2 concentration in the combustion agent. Varying temperature from 850 °C to 1150 °C resulted in a peak conversion of fuel-N to \\{NOx\\} in the temperature range of 950–1050 °C for all the tested O2 concentrations. Increasing the O2 concentration tended to lower the critical temperature corresponding to such a peak fuel-N conversion. Testing results also suggested that the presence of excessive water vapor in the combustion atmosphere would inhibit the release of fuel-N in the devolatilization stage and promote the formation of some reducing gases. In addition to the anticipated diluting effect, the steam addition also shortened the reaction time for homogeneous and heterogeneous \\{NOx\\} reduction by the reducing gases and char. It is postulated that the formation of OH radicals at high O2 content and high temperature could cause the observed increase in the \\{NOx\\} emission.

Chuanqiang Zhu; Shuyuan Liu; Huan Liu; Juan Yang; Xiaoxing Liu; Guangwen Xu

2015-01-01T23:59:59.000Z

375

Numerical simulations for the coal/oxidant distribution effects between two-stages for multi opposite burners (MOB) gasifier  

Science Journals Connector (OSTI)

Abstract A 3D CFD model for two-stage entrained flow dry feed coal gasifier with multi opposite burners (MOB) has been developed in this paper. At each stage two opposite nozzles are impinging whereas the two other opposite nozzles are slightly tangential. Various numerical simulations were carried out in standard CFD software to investigate the impacts of coal and oxidant distributions between the two stages of the gasifier. Chemical process was described by Finite Rate/Eddy Dissipation model. Heterogeneous and homogeneous reactions were defined using the published kinetic data and realizable k–? turbulent model was used to solve the turbulence equations. Gas–solid interaction was defined by Euler–Lagrangian frame work. Different reaction mechanism were investigated first for the validation of the model from published experimental results. Then further investigations were made through the validated model for important parameters like species concentrations in syngas, char conversion, maximum inside temperature and syngas exit temperature. The analysis of the results from various simulated cases shows that coal/oxidant distribution between the stages has great influence on the overall performance of gasifier. The maximum char conversion was found 99.79% with coal 60% and oxygen 50% of upper level of injection. The minimum char conversion was observed 95.45% at 30% coal with 40% oxygen at same level. In general with oxygen and coal above or equal to 50% of total at upper injection level has shown an optimized performance.

Imran Nazir Unar; Lijun Wang; Abdul Ghani Pathan; Rasool Bux Mahar; Rundong Li; M. Aslam Uqaili

2014-01-01T23:59:59.000Z

376

Development of a control-oriented model to optimise fuel consumption and NOX emissions in a DI Diesel engine  

Science Journals Connector (OSTI)

Abstract This paper describes a predictive NOX and consumption model, which is oriented to control and optimisation of DI Diesel engines. The model applies the Response Surface Methodology following a two-step process: firstly, the relationship between engine inputs (intake charge conditions and injection settings) and some combustion parameters (peak pressure, indicated mean effective pressure and burn angles) is determined; secondly, engine outputs (NOX and consumption) are predicted from the combustion parameters using NOX and mechanical losses models. Splitting the model into two parts allows using either experimental or modelled combustion parameters, thus enhancing the model flexibility. If experimental in-cylinder pressure is used to obtain combustion parameters, the mean error of predicted NOX and consumption are 2% and 6% respectively, with a calculation time of 5.5 ms. Using modelled parameters reduces the calculation time to 1.5 ms, with a penalty in the accuracy. The model performs well in a multi-objective optimisation, reducing NOX and consumption in different amounts depending on the objective of the optimisation.

S. Molina; C. Guardiola; J. Martín; D. García-Sarmiento

2014-01-01T23:59:59.000Z

377

Correcting injection pressure maladjustments to reduce NOX emissions by marine diesel engines  

Science Journals Connector (OSTI)

Emissions from the exhausts of marine diesel engines comprises several different gases including NOX. These are currently regulated at the international level under Regulation 13 of ANNEX VI of MARPOL 73/78, but this regulation only applies to new engines and is based on bench tests, for only a single engine designated the “parent engine”. Here, the need to take measurements from across their whole range and once in operation on board a vessel is examined. This would not only improve assessment of new equipment against the current regulation, but would also detect defects in the functioning of the engine.

C. Vanesa Durán Grados; Zigor Uriondo; Manuel Clemente; Francisco J. Jiménez Espadafor; Juan Moreno Gutiérrez

2009-01-01T23:59:59.000Z

378

Evaluation of gas reburning and low NO{sub x} burners on a wall-fired boiler  

SciTech Connect (OSTI)

An evaluation of Gas Reburning (GR) and Low NO{sub x}, Burners (LNB) has been completed at Public Service Company of Colorado`s Cherokee Station Unit 3. The goal of the demonstration, which was carried out in a US DOE Clean Coal Technology Round 3 Program, was to reduce NO{sub x} emissions by 70%. The reduction was to be achieved from the pre-project level, prior to LNB retrofit. The GR system was supplied by Energy and Environmental Research Corporation (EER) and the LNBs were supplied by the Foster Wheeler Energy Corporation. The project was carried out in three phases in which EER designed the GR system and obtained necessary permits (Phase 1), constructed the system and completed start-up tasks (Phase 2), and evaluated its performance with both Optimization Tests and a Long-Term Demonstration (Phase 3). As directed by the cooperative agreement, environmental monitoring was conducted in each phase. Measurements were taken by plant personnel and an EER Field Testing Team and were divided into two types. ``Compliance Monitoring`` was conducted by plant personnel to satisfy requirements of regulatory agencies, while ``Supplemental Monitoring`` was conducted by EER personnel to develop a database of environmental impacts of the technology and to ensure environmental acceptability of the project. This document presents environmental monitoring data obtained during the Long-Term Testing period, April 27, 1993 to January 27, 1995. During this period, ten months of testing of the GR-LNB system was followed by a modification into a ``second-generation`` GR-LNB system, which was evaluated for six months. Compliance Monitoring was conducted primarily in two areas, air emissions and aqueous discharges.

NONE

1995-06-01T23:59:59.000Z

379

Evaluation of gas reburning and low NO{sub x} burners on a wall-fired boiler  

SciTech Connect (OSTI)

An evaluation of Gas Reburning (GR) and Low NO{sub x} Burners (LNB) has been completed at Public Service Company of Colorado`s Cherokee Station Unit 3. The goal of the demonstration was to reduce NO{sub x} emissions by 70%. The reduction was to be achieved from the pre-project level prior to LNB retrofit. The GR system was supplied by Energy and Environmental Research Corporation (EER) and the LNBs were supplied by the Foster Wheeler Energy Corporation. The project was carried out in three phases in which EER designed the GR system and obtained necessary permits (Phase 1), constructed the system and completed start-up tasks (Phase 2), and evaluated its performance with both Optimization Tests and a Long-Term Demonstration (Phase 3). As directed by the Cooperative Agreement, environmental monitoring was conducted in each phase. Measurements were taken by plant personnel and an EER Field Testing Team and were divided into two types. ``Compliance Monitoring`` was conducted by plant personnel to satisfy requirements of regulatory agencies, while ``Supplemental Monitoring`` was conducted by EER personnel to develop a database of environmental impacts of the technology and to ensure environmental acceptability of the project. This document presents environmental monitoring data obtained during the Optimization Testing period, November 11, 1992 to April 23, 1993. Compliance Monitoring was conducted primarily in two areas, air emissions and aqueous discharges. The unit is required to meet an SO{sub 2} limit of 1.2 lb/MBtu and an opacity limit of 20 percent (6 minute average). Therefore, the plant monitors flue gas SO{sub 2} and opacity continuously and submits Excess Emissions Reports to the Colorado Air Pollution Control Division on a quarterly basis. Discharge limits for the aqueous effluent from the plant and monitoring requirements are specified by a permit issued by the Colorado Water Quality Control Division.

NONE

1995-06-01T23:59:59.000Z

380

Investigations of ash fouling with cattle wastes as reburn fuel in a small-scale boiler burner under transient conditions  

SciTech Connect (OSTI)

Fouling behavior under reburn conditions was investigated with cattle wastes (termed as feedlot biomass, FB) and coal as reburn fuels under a transient condition and short-time operation. A small-scale (30 kW or 100,000 Btu/hr) boiler burner research facility was used for the reburn experiments. The fuels considered for these experiments were natural gas (NG) for the ashless case, pure coal, pure FB, and blends of coal and FB. Two parameters that were used to characterize the ash 'fouling' were (1) the overall heat-transfer coefficient (OHTC) when burning NG and solid fuels as reburn fuels, and (2) the combustible loss through ash deposited on the surfaces of heat exchanger tubes and the bottom ash in the ash port. A new methodology is presented for determining ash fouling behavior under transient conditions. Results on the OHTCs for solid reburn fuels are compared with the OHTCs for NG. It was found that the growth of the layer of ash depositions over longer periods typically lowers OHTC, and the increased concentration of ash in gas phase promotes radiation in high-temperature zones during initial periods while decreasing the heat transfer in low-temperature zones. The ash analyses indicated that the bottom ash in the ash port contained a smaller percentage of combustibles with a higher FB percentage in the fuels, indicating better performance compared with coal because small particles in FB burn faster and the FB has higher volatile matter on a dry ash-free basis promoting more burn out. 16 refs., 12 figs., 6 tabs.

Hyukjin Oh; Kalyan Annamalai; John M. Sweeten [Texas A& amp; M University, College Station, TX (United States). Department of Mechanical Engineering

2008-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

N-nitrosamine and N-nitramine Formation from NOx Reactions with Amines during Amine-Based CO2  

E-Print Network [OSTI]

Capture for Post-combustion Carbon Sequestration Background! Generation of electricity and heat from power- combustion carbon sequestration, the capture and underground storage of CO2 from the exhaust gases of power formation from NOx reactions with amines during amine-based carbon dioxide capture for postcombustion carbon

Mitch, William A.

382

Nox reduction with CO over supported Pd catalysts under simulated post Euro-IV diesel exhaust conditions  

Science Journals Connector (OSTI)

The catalytic reduction of NOx with CO over Pd/Al2O3 and Pd/TiO2/Al2O3 under simulated post Euro-IV diesel exhaust conditions was studied. The catalytic activities obtained...2 loadings and total amounts of reduc...

Yinghua Li; Dae-Won Lee; Young-Chul Ko…

2008-12-01T23:59:59.000Z

383

Implications of Near-Term Coal Power Plant Retirement for SO2 and NOX and Life Cycle GHG Emissions  

Science Journals Connector (OSTI)

Implications of Near-Term Coal Power Plant Retirement for SO2 and NOX and Life Cycle GHG Emissions ... Life cycle GHG emissions were found to decrease by less than 4% in almost all scenarios modeled. ... Resulting changes in fuel use, life cycle greenhouse gas (GHG) emissions, and emissions of sulfur and nitrogen oxides are estimated. ...

Aranya Venkatesh; Paulina Jaramillo; W. Michael Griffin; H. Scott Matthews

2012-08-13T23:59:59.000Z

384

Flexible CHP System with Low NOx, CO, and VOC Emissions- Presentation by the Gas Technology Institute (GTI), June 2011  

Broader source: Energy.gov [DOE]

Presentation on Flexible CHP System with Low NOx, CO, and VOC Emissions, given by David Cygan of the Gas Technology Institute, at the U.S. DOE Industrial Distributed Energy Portfolio Review Meeting in Washington, D.C. on June 1-2, 2011.

385

Implications of near-term coal power plant retirement for SO2 and NOX, and life cycle GHG emissions  

E-Print Network [OSTI]

prices of electricity production Plant type Unit Price Nuclear ($/MWh) 16.51 Wind ($/MWh) 201 Hydro Top SO2 100 430 95 440 100 430 Top NOX 105 350 100 380 105 345 Small, inefficient 125 410 125 405 125) Manitoba Hydro Manitoba Hydro Undertaking # 57 http://www.pub.gov.mb.ca/exhibits/mh-83.pdf. (5) Sotkiewicz

Jaramillo, Paulina

386

Global partitioning of NOx sources using satellite observations: Relative roles of fossil fuel combustion, biomass burning and  

E-Print Network [OSTI]

combustion, biomass burning and soil emissions Lyatt Jaegle´ ,a Linda Steinberger,a Randall V. Martinbc anthropogenic emissions, mostly resulting from fossil fuel combustion and biomass burning, are superimposed-CHEM chemical transport model. Top-down NOx sources are partitioned among fuel combustion (fossil fuel

Lyatt Jaeglé

387

Field Demonstration of 0.2 Grams Per Horsepower-Hour (g/bhp-hr) Oxides of Nitrogen (NOx) Natural  

E-Print Network [OSTI]

: · Reducing health and environmental impacts from air pollution, and greenhouse gas emissions related pollution and greenhouse gas emissions beyond applicable standards, and that benefit natural gas ratepayers of nitrogen (NOx) emission standard of 0.20 g/bhp-hr for heavy duty engines to reduce levels of this critical

388

\\{NOx\\} reduction from a large bore natural gas engine via reformed natural gas prechamber fueling optimization  

Science Journals Connector (OSTI)

Lean combustion is a standard approach used to reduce \\{NOx\\} emissions in large bore (35–56 cm) stationary natural gas engines. However, at lean operating points, combustion instabilities and misfires give rise to high total hydrocarbon (THC) and carbon monoxide (CO) emissions. To counteract this effect, precombustion chamber (PCC) technology is employed to allow engine operation at an overall lean equivalence ratio while mitigating the rise of THC and CO caused by combustion instability and misfires. A PCC is a small chamber, typically 1–2% of the clearance volume. A separate fuel line supplies gaseous fuel to the PCC and a standard spark plug ignites the slightly rich mixture (equivalence ratio 1.1–1.2) in the PCC. The ignited PCC mixture enters the main combustion chamber as a high energy flame jet, igniting the lean mixture in the main chamber. Typically, natural gas fuels both the main chamber and the PCC. In the current research, a mixture of reformed natural gas (syngas) and natural gas fuels the PCC. Syngas is a broad term that refers to a synthetic gaseous fuel. In this case, syngas specifically denotes a mixture of hydrogen, carbon monoxide, nitrogen, and methane generated in a natural gas reformer. Syngas has a faster flame speed and a wider equivalence ratio range of operation than methane. Fueling the PCC with Syngas reduces combustion instabilities and misfires. This extends the overall engine lean limit, enabling further \\{NOx\\} reductions. Research results presented are aimed at quantifying the benefits of syngas PCC fueling. A model is developed to calculate the equivalence ratio in the PCC for different mixtures and flowrates of fuel. An electronic injection valve is used to supply the PCC with syngas. The delivery pressure, injection timing, and flow rate are varied to optimize PCC equivalence ratio. The experimental results show that supplying the PCC with 100% syngas improves combustion stability by 21% compared to natural gas PCC fueling. A comparison at equivalent combustion stability operating points between 100% syngas and natural gas shows an 87% reduction in \\{NOx\\} emissions for 100% syngas PCC fueling compared to natural gas PCC fueling.

Mathew D. Ruter; Daniel B. Olsen; Mark V. Scotto; Mark A. Perna

2012-01-01T23:59:59.000Z

389

Effect of B20 and Low Aromatic Diesel on Transit Bus NOx Emissions Over Driving Cycles with a Range of Kinetic Intensity  

SciTech Connect (OSTI)

Oxides of nitrogen (NOx) emissions for transit buses for up to five different fuels and three standard transit duty cycles were compared to establish whether there is a real-world biodiesel NOx increase for transit bus duty cycles and engine calibrations. Six buses representing the majority of the current national transit fleet and including hybrid and selective catalyst reduction systems were tested on a heavy-duty chassis dynamometer with certification diesel, certification B20 blend, low aromatic (California Air Resources Board) diesel, low aromatic B20 blend, and B100 fuels over the Manhattan, Orange County and UDDS test cycles. Engine emissions certification level had the dominant effect on NOx; kinetic intensity was the secondary driving factor. The biodiesel effect on NOx emissions was not statistically significant for most buses and duty cycles for blends with certification diesel, except for a 2008 model year bus. CARB fuel had many more instances of a statistically significant effect of reducing NOx. SCR systems proved effective at reducing NOx to near the detection limit on all duty cycles and fuels, including B100. While offering a fuel economy benefit, a hybrid system significantly increased NOx emissions over a same year bus with a conventional drivetrain and the same engine.

Lammert, M. P.; McCormick, R. L.; Sindler, P.; Williams, A.

2012-10-01T23:59:59.000Z

390

NOx, SO{sub 3} in the spotlight at NETL's 2006 Environmental Controls conference  

SciTech Connect (OSTI)

As emissions caps drop, technological solutions must become increasingly effective and efficient. Researchers, equipment vendors, and plant operators are exploring alternatives to SCR and SNCR, with a view to reducing the overall costs of NOx reduction. They have also achieved 95% to 99% removal of SO{sub 3}, with no visible plume opacity. These topics were discussed at ECC 2006. The first conference session focussed on selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) control of nitrogen oxide emissions; the second session addressed the related issue of reducing stack emissions and flue gas concentrations of sulfur trioxide. The article summarises many papers presented. Summaries and/or full versions of all the papers mentioned, and others, are posted at www.netl.doe.gov/publications/proceedings/06/ecc/index.html. 2 figs.

Mann, A.N.; Makovsky, L.E.; Sarkus, T.A. [Technology and Management Services Inc. (United States)

2007-02-15T23:59:59.000Z

391

Exhaust Gas Fuel Reforming of Diesel Fuel by Nonthermal Arc Discharge for NOx Trap Regeneration Application  

Science Journals Connector (OSTI)

Exhaust Gas Fuel Reforming of Diesel Fuel by Nonthermal Arc Discharge for NOx Trap Regeneration Application ... It has been demonstrated that low current arc discharges are highly nonhomogenous. ... In the second case, which corresponds to the most favorable one, assuming (i) a 100 kW car engine thermal power (i.e., 40 kW mechanical power), (ii) that the plasma will treat only a small fraction of the exhaust gas (typically 3.5%), (iii) that the plasma will operate under a cycling operating mode, and (iv) an 80% efficiency for the onboard production of electricity from the car engine, one can estimate that the electric power needed to run the plasma will be around 2.2% of the engine power only during 12 s every 11 km (6.8 miles), that is, 12 s every 6 min assuming a 110 km·h?1 (68 mph) average car velocity. ...

Alexandre Lebouvier; Franc?ois Fresnet; Fre?de?ric Fabry; Vale?rie Boch; Vandad Rohani; Franc?ois Cauneau; Laurent Fulcheri

2011-02-03T23:59:59.000Z

392

New CoO?SiO2-Sol Pillared Clays as Catalysts for NOx Conversion  

Science Journals Connector (OSTI)

For this purpose, codoped SiO2 sol PILC (CoSi?PILC) is prepared via an organic template route and the interlayer pillar structure is systematically investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), and nitrogen adsorption isotherm measurement, along with a preliminary test on the de-NOx catalytic activity. ... The steady-state selective catalytic reduction of NO with CO over CoSi?PILC catalyst was carried out in an isothermal fixed-bed continuous flow quartz reactor (o.d. ... The elemental composition of CoSi?PILC was analyzed to estimate the pillar content of SiO2 and CoO. ...

Jin-Ho Choy; Hyun Jung; Yang-Su Han; Joo-Byoung Yoon; Yong-Gun Shul; Hyun-Jong Kim

2002-08-20T23:59:59.000Z

393

Enhanced luminescence intensity and color purity of the red emitting LnVO{sub 4}:Eu{sup 3+}@ SiO{sub 2} (Ln = Gd, Y and Gd/Y) powder phosphors  

SciTech Connect (OSTI)

Graphical abstract: Display Omitted Highlights: ? Tetragonal phase lanthanide vanadates doped with Eu{sup 3+} were synthesized. ? Luminescence enhancement was done by optimizing the host (Gd,Y) and SiO{sub 2} coatings. ? SiO{sub 2} coating was characterized by SEM-EDAX, FT-IR and PL techniques. ? {sup 5}D{sub 0} ? {sup 7}F{sub 2} domination over {sup 5}D{sub 0} ? {sup 7}F{sub 1} indicates the absence of an inversion symmetry. ? Y{sub 0.95}VO{sub 4}:Eu{sup 3+}@ SiO{sub 2}(10 vol.%) is found to be a novel enhanced red emitting phosphor. -- Abstract: An attempt was made to enhance the luminescence properties of LnVO{sub 4}:Eu{sup 3+}@ SiO{sub 2} (Ln = Gd, Y and Gd/Y) powder phosphors. Pure phase with tetragonal structure of the produced phosphors was confirmed by XRD profiles. Sub-micron sized phosphors have shown 35% more PL intensity than the bulk, which was further improved 20.22% with SiO{sub 2} shell coating. SiO{sub 2} shell coating was optimized by SEM-EDAX, FT-IR, PL and TEM measurements. Emission intensities of the transition, {sup 5}D{sub 0} ? {sup 7}F{sub 2} have dominated {sup 5}D{sub 0} ? {sup 7}F{sub 1}, which indicated the lowering of an inverse symmetry in the vicinity of Eu{sup 3+} ions. Luminescence intensity and color purity were enhanced with the host modification by substituting Gd{sup 3+} with Y{sup 3+} sites, followed by SiO{sub 2} coating. Based on the systematic investigations carried out, the phosphor Y{sub 0.95}VO{sub 4}:Eu{sup 3+}{sub 0.05}@ SiO{sub 2} is suggested to be a novel contender for its suitable red emission in certain displays or lighting.

Rambabu, U. [Centre for Materials for Electronics Technology (C-MET), IDA Phase-III, Cherlapally, Hyderabad 500051 (India)] [Centre for Materials for Electronics Technology (C-MET), IDA Phase-III, Cherlapally, Hyderabad 500051 (India); Han, Sang-Do, E-mail: sdhan@kier.re.kr [Korea Institute of Energy Research (KIER), Daejeon 305-343 (Korea, Republic of)] [Korea Institute of Energy Research (KIER), Daejeon 305-343 (Korea, Republic of)

2013-02-15T23:59:59.000Z

394

2005_deer_habeger.pdf | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

2005deerhabeger.pdf Compare the loss of NOx reduction performance over LNT and SCR catalysts due to phosphorus exposure using a laboratory diesel fuel burner...

395

index | netl.doe.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

with today's regulatory requirements. Low-NOx burners and selective catalytic reduction (SCR) technology have enabled hundreds of power plants to reach mandated emission levels....

396

01-2014 | netl.doe.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

low-NOx burners, and selective catalytic reduction systems demonstrated through the clean coal programs managed by NETL. Continued research is expected to directly realize another...

397

Synthesis and Evaluation of Conformationally Restricted N4-Tetradentate Ligands for Implementation in An(III)/Ln(III) Separations  

SciTech Connect (OSTI)

The previous literature demonstrates that donor atoms softer than oxygen are effective for separating trivalent lanthanides (Ln(III)) from trivalent actinides (An(III)) (Nash, K.L., in: Gschneider, K.A. Jr., et al. (eds.) Handbook on the Physics and Chemistry of Rare Earths, vol. 18-Lanthanides/Actinides Chemistry, pp. 197-238. Elsevier Science, Amsterdam, 1994). It has also been shown that ligands that 'restrict' their donor groups in a favorable geometry, appropriate to the steric demands of the cation, have an increased binding affinity. A series of tetradentate nitrogen containing ligands have been synthesized with increased steric 'limits'. The pK a values for these ligands have been determined using potentiometric titration methods and the formation of the colored copper(II) complex has been used as a method to determine ligand partitioning between the organic and aqueous phases. The results for the 2-methylpyridyl-substituted amine ligands are encouraging, but the results for the 2-methylpyridyl-substituted diimines indicate that these ligands are unsuitable for implementation in a solvent extraction system due to hydrolysis.

Mark D. Ogden; G. Patrick Meier; Kenneth L. Nash

2012-01-01T23:59:59.000Z

398

Shifting primary energy source and NOx emission location with plug-in hybrid vehicles  

Science Journals Connector (OSTI)

Plug-in hybrid vehicles (PHEVs) present an interesting technological opportunity for using non-fossil primary energy in light duty passenger vehicles, with the associated potential for reducing air pollutant and greenhouse gas emissions, to the extent that the electric power grid is fed by non-fossil sources. This perspective, accompanying the article by Thompson et al (2011) in this issue, will touch on two other studies that are directly related: the Argonne study (Elgowainy et al 2010) and a PhD thesis from Utrecht (van Vliet 2010). Thompson et al (2011) have examined air quality effects in a case where the grid is predominantly fossil fed. They estimate a reduction of 7.42 tons/day of NOx from motor vehicles as a result of substituting electric VMTs for 20% of the light duty gasoline vehicle miles traveled. To estimate the impact of this reduction on air quality they also consider the increases in NOx emissions due to the increased load on electricity generating units. The NOx emission increases are estimated as 4.0, 5.5 and 6.3 tons for the Convenience, Battery and Night charging scenarios respectively. The net reductions are thus in the 1.1–3.4 tons/day range. The air quality modelling results presented show that the air quality impact from a ground-level ozone perspective is favorable overall, and while the effect is stronger in some localities, the difference between the three scenarios is small. This is quite significant and suggests that localization of the NOx emissions to point sources has a more pronounced effect than the absolute reductions achieved. Furthermore it demonstrates that localization of NOx emissions to electricity generating units by using PHEVs in vehicle traffic has beneficial effects for air quality not only by minimizing direct human exposure to motor vehicle emissions, but also due to reduced exposure to secondary pollutants (i.e. ozone). In an electric power grid with a smaller share of fossil fired generating units, the beneficial effects would be more pronounced. In such a case, it would also be possible to realize reductions in greenhouse gas emissions. The significance of the electric power generation mix for plug-in hybrid vehicles and battery electric vehicles is a key aspect of Argonne National Laboratories' well-to-wheel study which focuses on petroleum use and greenhouse gas emissions (Elgowainy et al 2010). The study evaluates possible reductions in petroleum use and GHG emissions in the electric power systems in four major regions of the United States as well as the US average generation mix, using Argonne's GREET life-cycle analysis model. Two PHEV designs are investigated through a Powertrain System Analysis Toolkit (PSAT) model: the power-split configuration (e.g. the current Toyota Prius model with Hymotion conversion), and a future series configuration where the engine powers a generator, which charges a battery that is used by the electric motor to propel the vehicle. Since the petroleum share is small in the electricity generation mix for most regions in the United States, it is possible to achieve significant reductions in petroleum use by PHEVs. However, GHG reduction is another story. In one of the cases in the study, PHEVs in the charge depleting mode and recharging from a mix with a large share of coal generation (e.g., Illinois marginal mix) produce GHG emissions comparable to those of baseline gasoline internal combustion engine vehicles (with a range from ?15% to +10%) but significantly higher than those of gasoline hybrid electric vehicles (with a range from +20% to +60%). In what is called the unconstrained charging scenario where investments in new generation capacity with high efficiency and low carbon intensity are envisaged, it becomes possible to achieve significant reductions in both petroleum use and GHG emissions. In a PhD dissertation at Utrecht University, van Vliet (2010) presents a comprehensive analysis of alternatives to gasoline and diesel by looking at various fuel and vehicle technologies. Three chapters are of particular interest from the

Deniz Karman

2011-01-01T23:59:59.000Z

399

An Experimental Investigation of the Origin of Increased NOx Emissions When Fueling a Heavy-Duty Compression-Ignition Engine with Soy Biodiesel  

Broader source: Energy.gov [DOE]

Optical engine experiments suggest that near stoichiometric charge-gas mixtures in the standing premixed autoignition zone near flame lift-off length explains biodiesel NOx increase under all conditions

400

Pillared smectite modified with carbon and manganese as catalyst for SCR of NOx with NH3. Part I. General characterization and catalyst screening  

Science Journals Connector (OSTI)

Carbon- and manganese-modified zirconia-pillared smectites were prepared, characterized (XRD, BET and pore analysis, XPS) and tested in selective catalytic reduction of NOx with NH3. Both untreated and acidic pre...

Lucjan Chmielarz; Roman Dziembaj; Teresa Grzybek; Jerzy Klinik…

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Integrated Dry NOx/SO2 Emissions Control System, A DOE Assessment  

SciTech Connect (OSTI)

The goal of the U.S. Department of Energy's (DOE) Clean Coal Technology (CCT) Program is to furnish the energy marketplace with a number of advanced, more efficient, and environmentally responsible coal utilization technologies through demonstration projects. These projects seek to establish the commercial feasibility of the most promising advanced coal technologies that have developed beyond the proof-of-concept stage. This document serves as a DOE post-project assessment (PPA) of a project selected in CCT Round III, the Integrated Dry NO{sub x}/SO{sub 2} Emissions Control System (IDECS), as described in a Report to Congress (U.S. Department of Energy 1991). The desire to reduce emissions of nitrogen oxides (NO, nitric oxide, and NO{sub 2}, nitrogen dioxide, collectively referred to as NO{sub x}) and sulfur dioxide (SO{sub 2}) by up to 70 percent at a minimum capital expenditure, while limiting waste production to dry solids that can be handled by conventional ash-removal equipment, prompted Public Service Company of Colorado (PSCC) to submit the proposal for the IDECS project. In March 1991, PSCC entered into a cooperative agreement with DOE to conduct the study. The project was sited at PSCC's Arapahoe Steam Electric Generating Station in Denver, Colorado. The purpose of this CCT project was to demonstrate the reduction of NO{sub x} and SO{sub 2} emissions by installing a combination of existing and emerging technologies, which were expected to work synergistically to reduce emissions. The technologies were low-NO{sub x} burners (LNBS), overfire air (OFA), and selective noncatalytic reduction (SNCR) for NO{sub x} reduction; and dry sorbent injection (DSI), both with and without flue-gas humidification (FGH), for SO{sub 2} reduction. DOE provided 50 percent of the total project funding of $26.2 million.

National Energy Technology Laboratory

2001-10-01T23:59:59.000Z

402

Applicability of RELAP5-3D for Thermal-Hydraulic Analyses of a Sodium-Cooled Actinide Burner Test Reactor  

SciTech Connect (OSTI)

The Actinide Burner Test Reactor (ABTR) is envisioned as a sodium-cooled, fast reactor that will burn the actinides generated in light water reactors to reduce nuclear waste and ease proliferation concerns. The RELAP5-3D computer code is being considered as the thermal-hydraulic system code to support the development of the ABTR. An evaluation was performed to determine the applicability of RELAP5-3D for the analysis of a sodium-cooled fast reactor. The applicability evaluation consisted of several steps, including identifying the important transients and phenomena expected in the ABTR, identifying the models and correlations that affect the code’s calculation of the important phenomena, and evaluating the applicability of the important models and correlations for calculating the important phenomena expected in the ABTR. The applicability evaluation identified code improvements and additional models needed to simulate the ABTR. The accuracy of the calculated thermodynamic and transport properties for sodium was also evaluated.

C. B. Davis

2006-07-01T23:59:59.000Z

403

Evaluation of gas-reburning and low NO{sub x} burners on a wall fired boiler. Technical progress report number 17, October 1--December 31, 1994  

SciTech Connect (OSTI)

The primary objective of this CCT project is to evaluate the use of Gas Reburning and Low NO{sub x} Burners (GR-LNB) for NO{sub x} emission control from a wall fired boiler. Low NO{sub x} burners are designed to delay the mixing of the coal fuel with combustion air to minimize the NO{sub x} formation. With GR, about 80--85% of the coal fuel is fired in the main combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO{sub x} is converted to N{sub 2}. The combustion process is completed by over fire air addition. SO{sub x} emissions are reduced to the extent that natural gas replaces sulfur-containing coal. The level of NO{sub x} reduction achievable with 15--20% natural gas is on the order of 50--60%. Thus the emission reduction target of the combination of these two developed technologies is about 70%. This project is being conducted in three phases at the host site, a 172 MW wall fired boiler of Public Service Company of Colorado (PSCo), Cherokee Unit 3 in Denver, Colorado: Phase 1--Design and Permitting; Phase 2--Construction and Start-up; and Phase 3--Operation, Data Collection, Reporting and Disposition. Phase 3 activities during this reporting period involved initiation of the second generation gas reburning parametric testing. This technology utilizes enhanced natural gas and overfire air injectors with elimination of the flue gas recirculation system. The objective is to demonstrate NO{sub x} reductions similar to that of long term testing but with a reduced capital cost requirement through elimination of the FGR system.

NONE

1994-12-13T23:59:59.000Z

404

Experimental investigation of the thermal and diluent effects of EGR components on combustion and \\{NOx\\} emissions of a turbocharged natural gas SI engine  

Science Journals Connector (OSTI)

Abstract Exhaust gas recirculation (EGR) is one of effective measures used in natural gas (NG) engines to reduce nitrogen oxides (NOx) emissions. Each component of EGR gases can exert different effects on NG combustion and \\{NOx\\} formation rates, such as thermal effect, diluent effect, and chemical effect. In this study, the thermal and diluent effects of the main components of EGR gases, including carbon dioxide (CO2) and nitrogen (N2), were experimentally investigated. The experiments were arranged based on an electronically controlled heavy-duty natural gas spark-ignition (SI) engine with multi-point injection and 6-cylinder. In order to define the diluent effect of EGR components, argon (Ar) was introduced to the test, for its low and unchangeable specific heat capacity under different temperatures. The results showed that the contribution of the diluent effect on \\{NOx\\} reductions was 50–60% and 41–53% for N2 and CO2 respectively, and the relevant contribution of the thermal effect was 40–50% and 47–59% respectively. CO2 had greater effects on NG combustion and \\{NOx\\} formation rates than N2 at the same dilution ratio. Increasing Ar improved the thermal efficiency due to the higher specific heat ratio provided. Meanwhile, \\{NOx\\} emissions were found to be decreased with increasing DR as a result of the diluent effect of Ar on combustion and \\{NOx\\} formations.

Weifeng Li; Zhongchang Liu; Zhongshu Wang; Yun Xu

2014-01-01T23:59:59.000Z

405

Evaluation of the Impacts of Biodiesel and Second Generation Biofuels on NOx Emissions for CARB Diesel Fuels  

Science Journals Connector (OSTI)

McCormick, R. L.; Graboski, M. S.; Alleman, T. L.; Herring, A. M.; Tyson, K. S.Impact of Biodiesel Source Material and Chemical Structure on Emissions of Criteria Pollutants from a Heavy-Duty Engine Environ. ... McCormick, Robert L.; Graboski, Michael S.; Alleman, Teresa L.; Herring, Andrew M.; Tyson, K. Shaine ... McCormick, R.; Alvarez, J.; Graboski, M.; Tyson, K.Fuel Additive and Blending Approaches to Reducing NOx Emissions from Biodiesel SAE Tech. ...

Maryam Hajbabaei; Kent C. Johnson; Robert A. Okamoto; Alexander Mitchell; Marcie Pullman; Thomas D. Durbin

2012-07-12T23:59:59.000Z

406

NOx, FINE PARTICLE AND TOXIC METAL EMISSIONS FROM THE COMBUSTION OF SEWAGE SLUDGE/COAL MIXTURES: A SYSTEMATIC ASSESSMENT  

SciTech Connect (OSTI)

This research project focuses on pollutants from the combustion of mixtures of dried municipal sewage sludge (MSS) and coal. The objective is to determine the relationship between (1) fraction sludge in the sludge/coal mixture, and (2) combustion conditions on (a) NOx concentrations in the exhaust, (b) the size segregated fine and ultra-fine particle composition in the exhaust, and (c) the partitioning of toxic metals between vapor and condenses phases, within the process. The proposed study will be conducted in concert with an existing ongoing research on toxic metal partitioning mechanisms for very well characterized pulverized coals alone. Both high NOx and low NOx combustion conditions will be investigated (unstaged and staged combustion). Tradeoffs between CO{sub 2} control, NO{sub x} control, and inorganic fine particle and toxic metal emissions will be determined. Previous research results have demonstrated that the inhalation of coal/MSS ash particles cause an increase in lung permeability than coal ash particles alone. Elemental analysis of the coal/MSS ash particles showed that Zn was more abundant in these ash particles than the ash particles of coal ash alone.

Jost O.L. Wendt

2003-01-31T23:59:59.000Z

407

NOx diesel exhaust treatment using a pulsed corona discharge: the pulse repetition rate effect  

Science Journals Connector (OSTI)

The pulsed corona offers real promise for degradation of pollutants in gas and water streams. This paper presents a study of NOx removal from diesel exhaust. Special emphasis is laid on the investigation of the dependence of the NO removal rate and efficiency on the pulse repetition rate (PRR). A nanosecond solid state power supply (45?kV, 60?ns, up to 1?kHz) was used for driving the corona reactor. A Mitsubishi 10?kW 3-cylinder diesel-generator engine with a total volume of 1300?cm3 was used as a source of exhaust gas. At an NO removal rate of 35% the NO removal efficiency was 53?g?kW?1h?1 for PRR = 500?Hz and the initial NO concentration was 375?ppm. A semi-empirical expression for the corona reactor removal efficiency related both to PRR and to the residence time is presented. The removal efficiency decreases with increasing PRR at constant flow rate or constant residence time. This expression demonstrates reasonable agreement between the calculation results and the experimental data.

Y Yankelevich; M Wolf; R Baksht; A Pokryvailo; J Vinogradov; B Rivin; E Sher

2007-01-01T23:59:59.000Z

408

Student Union Ln Chancellor's  

E-Print Network [OSTI]

Observatory Belk Hall 564 Martin Hall Hechenbleikner Lake Area Davis Lake University Lake Andrew Futrell St N Brevard St Center City Building 73 71 3001 Zone Description Supervisor MO00 Facilities Charles Kraus MOZ00 Area Management B Paul Taylor MOZ04 Zone 4 Maintenance Chris McKinney MOZ05 Zone 5

Howitt, Ivan

409

LAFAYETTE AVE SINCLAIR LN  

E-Print Network [OSTI]

DRSECURITY BLVD WINDSOR MILL RD PURNELL DR INGLESIDE AVE WOODLAWNDR FOREST PARK AVE BALTIMORE NATIONAL PIKE Burnside Memorial Park Woodburn Memorial Park Western Hills Park North Catonsville Community Park Banneker

Pevsner, Jonathan

410

Method for synthesizing fine-grained phosphor powders of the type (RE.sub.1- Ln.sub.x)(P.sub.1-y V.sub.y)O.sub.4  

DOE Patents [OSTI]

A method for generating well-crystallized photo- and cathodoluminescent oxide phosphor powders. The method of this invention uses hydrothermal synthesis and annealing to produce nearly monosized (RE.sub.1-x Ln.sub.x)(P.sub.1-y V.sub.y)O.sub.4 (Ln.dbd.Ce.fwdarw.Lu) phosphor grains with crystallite sizes from 0.04 to 5 .mu.m. Such phosphors find application in cathode-ray tube, flat-panel, and projection displays.

Phillips, Mark L. F. (83 Lagarto Rd., Tijeras, NM 87059)

1998-01-01T23:59:59.000Z

411

Calculation of NOx Emission Reduction from Implementation of the 2000 IECC/IRC Conservation Code in Texas  

E-Print Network [OSTI]

building prototypes, which will be constructed to be representative of the new building construction in Texas. 12 The NAHB characteristics divided the state into east (E), and west (W) divisions: window-to-wall area E=15.28%, W=20.6%, glazing U.... Division (East and West Texas): From NAHB survey data. 17. AFUE (%),SEER and Water Heater Efficiency for 1999 standard and IECC 2000 house are 80%, 11 and 76%, respectively. Table 1: 2002 NOx emissions reductions from implementation of the 2000 IECC...

Turner, W. D.; Yazdani, B.; Im, P.; Verdict, M.; Bryant, J.; Fitzpatrick, T.; Haberl, J. S.; Culp, C.

2003-01-01T23:59:59.000Z

412

Intergrated Nox Emissions Reductions from Energy Efficiency and Renewable Energy (EE/RE) Programs across State Agencies in Texas  

E-Print Network [OSTI]

1 Calculation of Integrated NOx Emissions Reductions from Energy Efficiency and Renewable Energy (EE/RE) Programs across State Agencies in Texas Juan-Carlos Baltazar, Ph.D., P.E.,Jeff S. Haberl, Ph.D., P.E., and Bahman Yazdani, P... on Environmental Quality (TCEQ) from the state-wide energy efficiency and renewable energy programs. These programs include: the impact of code-complaint construction, the Texas Public Utility Commission (PUC), the energy efficiency programs managed by the Texas...

Baltazar, J.C.; Haberl, J.; Yazdani, B.

2014-01-01T23:59:59.000Z

413

Impact of the Driving Cycle on the NOx and Particulate Matter Exhaust Emissions of Diesel Passenger Cars  

Science Journals Connector (OSTI)

Impact of the Driving Cycle on the NOx and Particulate Matter Exhaust Emissions of Diesel Passenger Cars ... The driving cycles used are the New European Driving Cycle (NEDC), the 11 and 15 modes Japanese cycles, and three U.S. driving cycles: Federal Test Procedure (FTP-75), US06, and Highway. ... In general, we can state that a reduction in compression ratio in combination with an advanced boosting system and a fast response of the EGR system with advanced EGR cooling leads to a reduction of the emission level. ...

Efthimios Zervas; George Bikas

2008-02-19T23:59:59.000Z

414

Development of a Low NOx Medium sized Industrial Gas Turbine Operating on Hydrogen-Rich Renewable and Opportunity Fuels  

SciTech Connect (OSTI)

This report presents the accomplishments at the completion of the DOE sponsored project (Contract # DE-FC26-09NT05873) undertaken by Solar Turbines Incorporated. The objective of this 54-month project was to develop a low NOx combustion system for a medium sized industrial gas turbine engine operating on Hydrogen-rich renewable and opportunity Fuels. The work in this project was focused on development of a combustion system sized for 15MW Titan 130 gas turbine engine based on design analysis and rig test results. Although detailed engine evaluation of the complete system is required prior to commercial application, those tasks were beyond the scope of this DOE sponsored project. The project tasks were organized in three stages, Stages 2 through 4. In Stage 2 of this project, Solar Turbines Incorporated characterized the low emission capability of current Titan 130 SoLoNOx fuel injector while operating on a matrix of fuel blends with varying Hydrogen concentration. The mapping in this phase was performed on a fuel injector designed for natural gas operation. Favorable test results were obtained in this phase on emissions and operability. However, the resulting fuel supply pressure needed to operate the engine with the lower Wobbe Index opportunity fuels would require additional gas compression, resulting in parasitic load and reduced thermal efficiency. In Stage 3, Solar characterized the pressure loss in the fuel injector and developed modifications to the fuel injection system through detailed network analysis. In this modification, only the fuel delivery flowpath was modified and the air-side of the injector and the premixing passages were not altered. The modified injector was fabricated and tested and verified to produce similar operability and emissions as the Stage 2 results. In parallel, Solar also fabricated a dual fuel capable injector with the same air-side flowpath to improve commercialization potential. This injector was also test verified to produce 15-ppm NOx capability on high Hydrogen fuels. In Stage 4, Solar fabricated a complete set of injectors and a combustor liner to test the system capability in a full-scale atmospheric rig. Extensive high-pressure single injector rig test results show that 15-ppm NOx guarantee is achievable from 50% to 100% Load with fuel blends containing up to 65% Hydrogen. Because of safety limitations in Solar Test Facility, the atmospheric rig tests were limited to methane-based fuel blends. Further work to validate the durability and installed engine capability would require long-term engine field test.

Srinivasan, Ram

2013-07-31T23:59:59.000Z

415

Evaluation of gas-reburning and low NO{sub x} burners on a wall fired boiler. Progress report, January 1--March 31, 1996  

SciTech Connect (OSTI)

The primary objective of this Clean Coal Technology project is to evaluate the use of Gas Reburning and Low NO{sub x} Burners (GR-LNB) for NO{sub x} emission control from a wall fired boiler. This project is being conducted in three phases at the host site, a 172 MW{sub e} wall fired boiler of Public Service Company of Colorado, Cherokee Unit 3 in Denver, Colorado: Phase I, design and permitting has been completed on June 30, 1992; Phase II, construction and start-up has been completed on September 1991; and Phase III, operation, data collection, reporting and disposition. Phase III activities during this reporting period involved the following: compilation, analysis and assembly of the final report and initiation of restoration activities; restoration of the gas reburning system involving removal of the flue gas recirculation system (permanent Second Generation Gas Reburning); and participants meeting and reburning workshop. Long term testing of the equipment demonstrated an average NO{sub x} reduction of 65% using 18% gas heat input. After removing the flue gas recirculation system, (Second Generation GR), an average NO{sub x} of 64% was achieved using 13% gas heat input. The project goal of 70% reduction was achieved, but no on an average basis due to the load requirements of the utility.

NONE

1996-04-15T23:59:59.000Z

416

Comprehensive report to Congress: Clean Coal Technology program: Evaluation of gas reburning and low-NO sub x burners on a wall-fired boiler  

SciTech Connect (OSTI)

This report briefly describes the Gas Reburning and Low-NO{sub x} Burners technology which is a low-cost technology that can be applied in both retrofit and new applications. This demonstration will be conducted on a utility boiler in Colorado at Cherokee Station {number sign}3; however, the technology is applicable to industrial boilers and other combustion systems. Although this technology is primarily a NO{sub x} reduction technology, some reductions in other emissions will take place. Since 15--20% of the coal is replaced with natural gas, SO{sub 2} and particulate emissions are reduced commensurately. Also the lower carbon-to-hydrogen ratio of natural gas compared to coal reduces CO{sub 2} emissions. The formation of NO{sub x} is controlled by several factors: (1) the amount of nitrogen that is chemically bound in the fuel; (2) the flame temperature; (3) the residence time that combustion products remain at very high temperatures; and (4) the amount of excess oxygen available, especially at the hottest parts of the flame. Decreasing any of these parameters, tends to reduce NO{sub x} formation. 6 figs., 1 tab.

Not Available

1990-09-01T23:59:59.000Z

417

Understanding the Synergistic Catalytic Effect between La2O3 and CaO for the CH4 Lean De-NOx Reaction:? Kinetic and Mechanistic Studies  

Science Journals Connector (OSTI)

Department of Chemistry, Heterogeneous Catalysis Laboratory, University of Cyprus, P.O. ... 3-5 Methane is of particular interest as a reductant hydrocarbon species because of the large availability of natural gas, the use of the latter at gas-fired power plants (main stationary NOx polluting source), and the potential to be considered as an alternative to NH3 reductant used in industrial practice (NH3?SCR technology), which faces various problems. ... However, the likelihood for the presence of inactive but exchangeable NOx species with gaseous 15NO cannot be excluded. ...

T. Anastasiadou; L. A. Loukatzikou; C. N. Costa; A. M. Efstathiou

2005-06-28T23:59:59.000Z

418

Analysis of different control strategies for the simultaneous reduction of CO2 and NOx emissions of a diesel hybrid passenger car  

Science Journals Connector (OSTI)

Different control strategies for a diesel parallel hybrid passenger car were evaluated through numerical simulations. Two different control strategies were analysed: the first focused on fuel consumption minimisation, the second on NOx emissions cuts. Each of these goals was addressed through two different methodologies, the first based on a group of heuristic laws, the second focused on the instantaneous minimisation of a cost function that takes into account both the fuel and battery energies. A first assessment of the potential of a diesel hybrid passenger car as far as fuel consumption and NOx emissions reductions are concerned was obtained.

Federico Millo; Carlo V. Ferraro; Luciano Rolando

2012-01-01T23:59:59.000Z

419

JV Task 117 - Impact of Lignite Properties on Powerspan's NOx Oxidation System  

SciTech Connect (OSTI)

Powerspan's multipollutant control process called electrocatalytic oxidation (ECO) technology is designed to simultaneously remove SO{sub 2}, NO{sub x}, PM{sub 2.5}, acid gases (such as hydrogen fluoride [HF], hydrochloric acid [HCl], and sulfur trioxide [SO{sub 3}]), Hg, and other metals from the flue gas of coal-fired power plants. The core of this technology is a dielectric barrier discharge reactor composed of cylindrical quartz electrodes residing in metal tubes. Electrical discharge through the flue gas, passing between the electrode and the tube, produces reactive O and OH radicals. The O and OH radicals react with flue gas components to oxidize NO to NO{sub 2} and HNO{sub 3} and a small portion of the SO{sub 2} to SO{sub 3} and H{sub 2}SO{sub 4}. The oxidized compounds are subsequently removed in a downstream scrubber and wet electrostatic precipitator. A challenging characteristic of selected North Dakota lignites is their high sodium content. During high-sodium lignite combustion and gas cooling, the sodium vaporizes and condenses to produce sodium- and sulfur-rich aerosols. Based on past work, it was hypothesized that the sodium aerosols would deposit on and react with the silica electrodes and react with the silica electrodes, resulting in the formation of sodium silicate. The deposit and reacted surface layer would then electrically alter the electrode, thus impacting its dielectric properties and NO{sub x} conversion capability. The purpose of this project was to determine the impact of lignite-derived flue gas containing sodium aerosols on Powerspan's dielectric barrier discharge (DBD) reactor with specific focus on the interaction with the quartz electrodes. Partners in the project were Minnkota Power Cooperative; Basin Electric Power Cooperative; Montana Dakota Utilities Co.; Minnesota Power; the North Dakota Industrial Commission, the Lignite Energy Council, and the Lignite Research Council; the Energy & Environmental Research Center (EERC); and the U.S. Department of Energy. An electrocatalytic oxidation (ECO) reactor slipstream system was designed by Powerspan and the EERC. The slipstream system was installed by the EERC at Minnkota Power Cooperative's Milton R. Young Station Unit 1 downstream of the electrostatic precipitator where the flue gas temperature ranged from 300 to 350 F. The system was commissioned on July 3, 2007, operated for 107 days, and then winterized upon completion of the testing campaign. Operational performance of the system was monitored, and data were archived for postprocessing. A pair of electrodes were extracted and replaced on a biweekly basis. Each pair of electrodes was shipped to Powerspan to determine NO conversion efficiency in Powerspan's laboratory reactor. Tested electrodes were then shipped to the EERC for scanning electron microscopy (SEM) and x-ray microanalysis. Measurement of NO{sub x} conversion online in operating the slipstream system was not possible because the nitric and sulfuric acid production by the DBD reactor results in conditioning corrosion challenges in the sample extraction system and NO measurement technologies. The operational observations, performance results, and lab testing showed that the system was adversely affected by accumulation of the aerosol materials on the electrode. NO{sub x} conversion by ash-covered electrodes was significantly reduced; however, with electrodes that were rinsed with water, the NOx conversion efficiency recovered to nearly that of a new electrode. In addition, the visual appearance of the electrode after washing did not show evidence of a cloudy reacted surface but appeared similar to an unexposed electrode. Examination of the electrodes using SEM x-ray microanalysis showed significant elemental sodium, sulfur, calcium, potassium, and silica in the ash coating the electrodes. There was no evidence of the reaction of the sodium with the silica electrodes to produce sodium silicate layers. All SEM images showed a clearly marked boundary between the ash and the silica. Sodium and sulfur are the main culprits in the

Scott Tolbert; Steven Benson

2008-02-29T23:59:59.000Z

420

Near-Zero Emissions Oxy-Combustion Flue Gas Purification Task 2: SOx/Nox/Hg Removal for High Sulfur Coal  

SciTech Connect (OSTI)

The goal of this project is to develop a near-zero emissions flue gas purification technology for existing PC (pulverized coal) power plants that are retrofitted with oxy-combustion technology. The objective of Task 2 of this project was to evaluate an alternative method of SOx, NOx and Hg removal from flue gas produced by burning high sulfur coal in oxy-combustion power plants. The goal of the program was not only to investigate a new method of flue gas purification but also to produce useful acid byproduct streams as an alternative to using a traditional FGD and SCR for flue gas processing. During the project two main constraints were identified that limit the ability of the process to achieve project goals. 1) Due to boiler island corrosion issues >60% of the sulfur must be removed in the boiler island with the use of an FGD. 2) A suitable method could not be found to remove NOx from the concentrated sulfuric acid product, which limits sale-ability of the acid, as well as the NOx removal efficiency of the process. Given the complexity and safety issues inherent in the cycle it is concluded that the acid product would not be directly saleable and, in this case, other flue gas purification schemes are better suited for SOx/NOx/Hg control when burning high sulfur coal, e.g. this project's Task 3 process or a traditional FGD and SCR.

Nick Degenstein; Minish Shah; Doughlas Louie

2012-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Effects of diesel-water emulsion combustion on diesel engine NOx emissions. Final report, 1 January 1998--1 May 1999  

SciTech Connect (OSTI)

This study examines the effects of combusting a mixture of diesel fuel, water, and surfactant on the nitrogen oxides (NOx) emissions from a compression ignition diesel engine. Extensive previous research in the literature has attributed the observed reduction of nitrogen oxide emissions to a suppression of flame temperature due to quenching effects from the water, thereby reducing thermal NOx formation. The report highlights the relevant theory, operation, and design parameters of diesel internal combustion engines. Experimental procedures conducted using a Detroit Diesel 4-cylinder diesel engine are discussed. Results from testing diesel fuel with varying ratios of water balanced with a surfactant to stabilize the emulsion are presented and discussed. The data shows significant NOx emission reduction with up to 45 percent water, by volume, in the fuel. These results are correlated with thermodynamic first law and equilibrium combustion products analyses to estimate the adiabatic flame temperature of the standard fuel and fuel-water emulsion cases. Results indicate that thermal NOx is indeed reduced by quenching and flame temperature suppression, confirming reports in the literature. Recommendations are given for further studies, including improving the fuel-water emulsion and considerations for long-term testing.

Canfield, A.C.

1999-05-01T23:59:59.000Z

422

Method for synthesizing fine-grained phosphor powders of the type (RE{sub 1{minus}x}Ln{sub x})(P{sub 1{minus}y}V{sub y})O{sub 4}  

DOE Patents [OSTI]

A method for generating well-crystallized photo- and cathodoluminescent oxide phosphor powders is disclosed. The method of this invention uses hydrothermal synthesis and annealing to produce nearly monosized (RE{sub 1{minus}x}Ln{sub x})(P{sub 1{minus}y}V{sub y}O{sub 4}) (Ln{double_bond}Ce{yields}Lu) phosphor grains with crystallite sizes from 0.04 to 5 {micro}m. Such phosphors find application in cathode-ray tube, flat-panel, and projection displays. 4 figs.

Phillips, M.L.F.

1998-04-28T23:59:59.000Z

423

Microsoft Word - 41892_Praxair_Low NOx_Factsheet_Rev 0a_01-09-04.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

FACT SHEET FACT SHEET Revision 0a Jan. 9, 2004 Page 1 of 4 I. PROJECT DESCRIPTION A. Objective: The objective of this project is to design a gas turbine combustor system for new and existing turbines with a combination of air flow management control and fuel composition control to achieve 2 ppm NOx emissions. Since most Integrated Gasification Combined-Cycle (IGCC) systems consider the use of natural gas as an alternative fuel and there is a large infrastructure of existing natural gas based turbines, it is imperative that the combustor design be amenable to operating on both coal derived fuel gas and natural gas. The specific objectives of each phase of this program are: Phase I: Develop conceptual design of turbine combustor with air flow control and fuel

424

DEVELOPMENT OF A VALIDATED MODEL FOR USE IN MINIMIZING NOx EMISSIONS AND MAXIMIZING CARBON UTILIZATION WHEN COFIRING BIOMASS WITH COAL  

SciTech Connect (OSTI)

This is the first Quarterly Technical Report for DOE Cooperative Agreement No. DE-FC26-00NT40895. A statement of the project objectives is included in the Introduction of this report. The project goals and detailed plans were presented in two project kickoff meetings; one at NETL in Pittsburgh and one in Birmingham, AL at Southern Research Institute. Progress has been made in developing a modeling approach to synthesize the reaction time and temperature distributions that will be produced by computational fluid dynamic models of the pilot-scale combustion furnace and the char burnout and chemical reaction kinetics that will predict NOx emissions and unburned carbon levels in the furnace exhaust. Preparations are under way for the initial pilot-scale combustion experiments.

Larry G. Felix; P. Vann Bush; Stephen Niksa

2001-01-24T23:59:59.000Z

425

A method to extend flamelet manifolds for prediction of NOx and long time scale species with tabulated chemistry  

Science Journals Connector (OSTI)

Numerical simulation is currently used to help design low NOx devices for aircraft engines. In order to improve the prediction of pollutant species, combustion models based on tabulated chemistry have been commonly used in recent years. However, the short time scales of usual flamelet manifolds can lead to errors concerning the NO prediction in post flame area, as shown in this paper. Thus, a new method is proposed to extend the manifold in order to describe the evolution of species with a long characteristic time. This method is tested in the framework of 0D-1D computations. The use of the extended manifold is shown to be necessary to correctly predict the evolution of NO concentration in burnt gases. As an example, the extended and classical manifolds were compared in the framework of 2D simulations of an industrial-like combustor, showing an evident difference on the NO levels predicted in the outlet section.

Aymeric Boucher; Nicolas Bertier; Francis Dupoirieux

2014-01-01T23:59:59.000Z

426

Built-in biaxial strain dependence of I'-X transport in GaAs/ln,Al, -,AsJGaAs pseudomorphic heterojunction barriers (x=0, 0.03, and 0.06)  

E-Print Network [OSTI]

of thermionic emission and tunneling currents for the case of IT-X transport are signifi- cantly smaller thanBuilt-in biaxial strain dependence of I'-X transport in GaAs/ln,Al, -,AsJGaAs pseudomorphic 5800, Albuquerque, New Mexico 8718.5-1370 (Received 12 May 1994; accepted for publication 26 August

Yang, Kyounghoon

427

Mass Balance of Gaseous and Particulate Products from ?-Pinene/O3/Air in the Absence of Light and ?-Pinene/NOx/Air in the Presence of Natural Sunlight  

Science Journals Connector (OSTI)

The gas and particle phase products from the reaction of ?-pinene with the atmospheric oxidants O3 and OH radicals in the presence of NOx were investigated using both gas chromatography-mass spectrometry (GC-MS) ...

M. Jaoui; R. M. Kamens

2003-06-01T23:59:59.000Z

428

180 MW demonstration of advanced tangentially-fired combustion techniques for the reduction of nitrogen oxide (NOx) emissions from coal-fired boilers. Technical progress report, First quarter 1991  

SciTech Connect (OSTI)

This project is being conducted at Gulf Power Company`s Plant Lansing Smith Unit 2 (LS-2) located near Panama City, Florida. The primary objective of this demonstration is to determine the long-term effects of commercially available tangentially-fired low NOx combustion technologies on NOx emissions and boiler performance. The stepwise approach that is being used to evaluate the NOx control technologies requires three plant outages to successively install the test instrumentation and the different levels of the low NOx concentric firing system (LNCFS). Following each outage, a series of four groups of tests are performed. These are (1) diagnostic, (2) performance, (3) long-term, and (4) verification. These tests are used to quantify the NOx reductions of each technology and evaluate the effects of those reductions on other combustion parameters such as particulate characteristics and boiler efficiency. This quarterly update provides a description of the flow modeling study. This modeling effort centers on evaluating the in-furnace flow and mixing phenomena for the various low NOx firing systems being demonstrated at LS-2. Testing on the 1/12 scale model of the LS-2 boiler and the 1/6 scale model of the overfire air ductwork was completed. The test matrix included an analysis of the overfire air ductwork and three different boiler configurations. This report also contains results from the Phase 1 baseline tests. Data from the diagnostic, performance, and verification tests are presented. In addition, NOx emissions data and unit load profiles collected during long-term testing are reported. At the full load condition, the baseline NOx emission level at LS-2 is 0.62 lb/mBtu.

Not Available

1991-12-31T23:59:59.000Z

429

Near-Zero Emissions Oxy-Combustion Flue Gas Purification Task 3: SOx/NOx/Hg Removal for Low Sulfur Coal  

SciTech Connect (OSTI)

The goal of this project was to develop a near-zero emissions flue gas purification technology for existing PC (pulverized coal) power plants that are retrofitted with oxycombustion technology. The objective of Task 3 of this project was to evaluate an alternative method of SOx, NOx and Hg removal from flue gas produced by burning low sulfur coal in oxy-combustion power plants. The goal of the program was to conduct an experimental investigation and to develop a novel process for simultaneously removal of SOx and NOx from power plants that would operate on low sulfur coal without the need for wet-FGD & SCRs. A novel purification process operating at high pressures and ambient temperatures was developed. Activated carbonâ??s catalytic and adsorbent capabilities are used to oxidize the sulfur and nitrous oxides to SO{sub 3} and NO{sub 2} species, which are adsorbed on the activated carbon and removed from the gas phase. Activated carbon is regenerated by water wash followed by drying. The development effort commenced with the screening of commercially available activated carbon materials for their capability to remove SO{sub 2}. A bench-unit operating in batch mode was constructed to conduct an experimental investigation of simultaneous SOx and NOx removal from a simulated oxyfuel flue gas mixture. Optimal operating conditions and the capacity of the activated carbon to remove the contaminants were identified. The process was able to achieve simultaneous SOx and NOx removal in a single step. The removal efficiencies were >99.9% for SOx and >98% for NOx. In the longevity tests performed on a batch unit, the retention capacity could be maintained at high level over 20 cycles. This process was able to effectively remove up to 4000 ppm SOx from the simulated feeds corresponding to oxyfuel flue gas from high sulfur coal plants. A dual bed continuous unit with five times the capacity of the batch unit was constructed to test continuous operation and longevity. Full-automation was implemented to enable continuous operation (24/7) with minimum operator supervision. Continuous run was carried out for 40 days. Very high SOx (>99.9%) and NOx (98%) removal efficiencies were also achieved in a continuous unit. However, the retention capacity of carbon beds for SOx and NOx was decreased from ~20 hours to ~10 hours over a 40 day period of operation, which was in contrast to the results obtained in a batch unit. These contradictory results indicate the need for optimization of adsorption-regeneration cycle to maintain long term activity of activated carbon material at a higher level and thus minimize the capital cost of the system. In summary, the activated carbon process exceeded performance targets for SOx and NOx removal efficiencies and it was found to be suitable for power plants burning both low and high sulfur coals. More efforts are needed to optimize the system performance.

Monica Zanfir; Rahul Solunke; Minish Shah

2012-06-01T23:59:59.000Z

430

180 MW demonstration of advanced tangentially-fired combustion techniques for the reduction of nitrogen oxide (NOx) emissions from coal-fired boilers. Technical progress report, Third quarter 1992  

SciTech Connect (OSTI)

The project is being conducted at Gulf Power Company`s Plant Lansing Smith Unit 2 located near Panama City, Florida. The primary objective of this demonstration is to determine the long-term effects of commercially available tangentially-fired low NOx combustion technologies on NOx emissions and boiler performance. A target of achieving 50% NOx reduction using combustion modifications has been established for the project. The stepwise approach that is being used to evaluate the NOx control technologies requires three plant outages to successively install the test instrumentation and the different levels of the low NOx concentric firing system (LNCFS). Following each outage, a series of four groups of tests are performed. These are (1) diagnostic, (2) performance, (3) long-term, and (4) verification. These tests are used to quantify the NOx reductions of each technology and evaluate the effects of those reductions on other combustion parameters such as particulate characteristics and boiler efficiency. This technical progress report presents the LNCFS Level 1 long-term data collected during this quarter. In addition, a comparison of all the long-term emissions data that have been collected to date is included.

Not Available

1992-12-31T23:59:59.000Z

431

Visualization research on high efficiency and low NOx combustion technology with multiple air?staged and large angle counter flow of fuel?rich jet  

Science Journals Connector (OSTI)

In this paper a new technique for tangentially fired pulverized coal boiler high efficiency and low NOx combustion technology with multiple air?staged and large angle counter flow of fuel?rich jet (ACCT for short) is proposed. Based on traditional air staged and rich?lean combustion technique a NOx reduction area is introduced through air injection between primary combustion zone and secondary combustion zone. To verify the characters of this technique experiment with a new developed visualization method image processing on smog tracing with fractal dimension is carried out on a cold model of 300 MW furnace designed with this technique. The result shows compared to injection without counter flow the center lines of counter flow injection go deeper into the chamber and form a smaller tangential circle which means the rotating momentum of entire vortex is feebler and the exit gyration is weaker. It also shows that with counter flow the fractal dimensions of boundary between primary jet and front fire side air is bigger which means more intense turbulence and better mix. As a conclusion with fractal dimension image processing on smog tracing method can be a quantificational convenient and effective visualization way without disturbing the flow field and it’s also acknowledged that ACCT has the following superiorities: high burn out rate low NOx emission stable burning slagging preventing and temp?bias reducing.

Y. Y. Li; Y. Li; Z. C. Lin; W. D. Fan; M. C. Zhang

2010-01-01T23:59:59.000Z

432

Influence of operating conditions and coal properties on \\{NOx\\} and N2O emissions in pressurized fluidized bed combustion of subbituminous coals  

Science Journals Connector (OSTI)

This experimental study is aimed at finding effects of operating conditions in PFBC on nitrogen oxide emissions for subbituminous coals differing in ash content/composition, combustion/gasification reactivities and in particle size distribution. The experiments have been done on a smaller laboratory apparatus with ID=8 cm. The effects of operating pressure (0.1–1 MPa), temperature of the fluidized bed (800–900 °C), freeboard temperature and oxygen concentration (3–10 vol.%) on the nitrogen oxides emissions are relatively complex, coupled with temperature of burning coal particles. The coal ash content/composition (esp. CaO and Fe2O3) and fly ash freeboard concentration play an important role in formation/destruction chemistry of both NO and N2O. The \\{NOx\\} emissions decrease with increasing operating pressure at the same volumetric oxygen concentration and temperature. Temperature, volatile content, reactivities of coals and ash composition are the most important factors for N2O emissions. The N2O emissions are either almost constant or can exhibit a maximum at increasing operating pressure. Influence of increasing oxygen concentration on \\{NOx\\} and N2O emissions is more pronounced at lower operating pressures, esp. for the less reactive, medium ash coal. The particle size distribution of the coal (influence of coal dust) can cause characteristic changes in \\{NOx\\} and N2O emissions in PFBC, esp. at lower combustion temperatures (800–840 °C). The emission changes are dependent on ash properties/composition.

Karel Svoboda; Michael Poho?elý

2004-01-01T23:59:59.000Z

433

Validation of a zero-dimensional model for prediction of \\{NOx\\} and engine performance for electronically controlled marine two-stroke diesel engines  

Science Journals Connector (OSTI)

The aim of this paper is to derive a methodology suitable for energy system analysis for predicting the performance and \\{NOx\\} emissions of marine low speed diesel engines. The paper describes a zero-dimensional model, evaluating the engine performance by means of an energy balance and a two zone combustion model using ideal gas law equations over a complete crank cycle. The combustion process is divided into intervals, and the product composition and flame temperature are calculated in each interval. The \\{NOx\\} emissions are predicted using the extended Zeldovich mechanism. The model is validated using experimental data from two MAN B&W engines; one case being data subject to engine parameter changes corresponding to simulating an electronically controlled engine; the second case providing data covering almost all model input and output parameters. The first case of validation suggests that the model can predict specific fuel oil consumption and \\{NOx\\} emissions within the 95% confidence intervals given by the experimental measurements. The second validation confirms the capability of the model to match measured engine output parameters based on measured engine input parameters with a maximum 5% deviation.

Fabio Scappin; Sigurður H. Stefansson; Fredrik Haglind; Anders Andreasen; Ulrik Larsen

2012-01-01T23:59:59.000Z

434

High pressure conversion of \\{NOx\\} and Hg and their capture as aqueous condensates in a laboratory piston-compressor simulating oxy-fuel CO2 compression  

Science Journals Connector (OSTI)

Abstract Oxy-fuel technology for CO2 capture has largely focused on combustion characteristics as a driver towards demonstration. Impurity removal studies typically centre on the how current environmental control units (FGD, SCR, activated carbon beds) operate in oxy-fuel firing. However, it is expected that some removal of \\{NOx\\} and \\{SOx\\} may occur during compression of flue gas through the lead chamber process. Some commercial systems link the capture of mercury to the formation of acid condensates (as a soluble mercury salt). Mercury in compressed flue gas represents a potential corrosion risk in the processing of CO2 from oxy-fuel combustion processes. Gas phase elemental mercury (Hg0) is difficult to remove from the flue gas and the level of cleaning required to prevent corrosion of cryogenic brazed aluminium heat exchangers is uncertain. This work has investigated the behaviour of gaseous Hg0 in pressurised oxy-fuel systems in terms of the potential capture in acidic condensates, interaction with \\{NOx\\} gases and liquid stability on de-pressurisation. The work was undertaken on an adapted laboratory scale three stage axial-piston compressor with gas and liquid sampling at pressures up to 30 bar. The main finding was that gaseous Hg0 reacts readily with NO2 formed from NO oxidation at high pressure. This reaction occurred without the presence of water, either water vapour or liquid water, contrary to speculation in the literature. Without NO2, no capture of Hg0 was observed in the compression system. Overall, the capture of mercury during compression occurred as a consequence of high pressure, longer residence time and concentration of NO2. Capture rates of 100% Hg and 75–83% \\{NOx\\} were measured from the compressor exit at 30 bar g.

Rohan Stanger; Timothy Ting; Terry Wall

2014-01-01T23:59:59.000Z

435

Ambient Temperature Hydrocarbon Selective Catalytic Reduction of NOx Using Atmospheric Pressure Nonthermal Plasma Activation of a Ag/Al2O3 Catalyst  

Science Journals Connector (OSTI)

Ambient Temperature Hydrocarbon Selective Catalytic Reduction of NOx Using Atmospheric Pressure Nonthermal Plasma Activation of a Ag/Al2O3 Catalyst ... This low temperature activity provides the basis for applying nonthermal plasmas to activate emission control catalysts during cold start conditions, which remains an important issue for mobile and stationary applications. ... (14, 15) Therefore, the combination of heterogeneous catalysis with plasmas has attracted interest due to the combined possible advantages of having a fast and low-temperature reaction from atmospheric nonthermal plasma and high product selectivity from heterogeneous catalysis. ...

Cristina E. Stere; Wameedh Adress; Robbie Burch; Sarayute Chansai; Alexandre Goguet; William G. Graham; Fabio De Rosa; Vincenzo Palma; Christopher Hardacre

2014-01-10T23:59:59.000Z

436

Combined Heat and Power | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

nitrogen oxide (NOx) gas-fired burner for the U.S. small industrial plant, school, and health care facility boiler market. Partners: CMCE, Inc., Santa Clara, CA, and Altex...

437

Oxyfuel CO2 compression: The gas phase reaction of elemental mercury and \\{NOx\\} at high pressure and absorption into nitric acid  

Science Journals Connector (OSTI)

Abstract Oxyfuel combustion is a technology which combusts coal in oxygen and recycled flue gas, producing a carbon dioxide rich flue gas for sequestration. Oxyfuel flue gas contains trace amounts of elemental mercury, which may corrode brazed aluminium heat exchangers used in the carbon dioxide purification system. International gas vendors have tested the use of the compression system to remove other flue gas impurities such as NOx; however, the reaction mechanism of mercury and its reaction products with \\{NOx\\} and nitric acid formed with condensed water vapour are unclear. This study used lab scale experiments to study the absorption of gaseous elemental mercury into nitric acid and the gas phase reaction between mercury and nitrogen dioxide formed from oxidised NO at pressures up to 25 bar. It was observed that mercury has limited absorption into nitric acid and may partially desorb out of solution after depressurisation. On the other hand, mercury reacted readily with nitrogen dioxide (formed from nitric oxide oxidation at high pressure) in the gas phase. These gas phase reactions from the oxidation of nitric oxide to nitrogen dioxide to the subsequent oxidation of elemental mercury by nitrogen dioxide were predicted using existing global kinetic equations. The limited absorption of gaseous elemental mercury in nitric acid and significant oxidation of gaseous elemental mercury by nitrogen dioxide suggests that the primary removal step for elemental mercury is through the gas phase reaction. Oxyfuel compression circuits should therefore allow sufficient residence time for this gas phase reaction to occur.

Timothy Ting; Rohan Stanger; Terry Wall

2014-01-01T23:59:59.000Z

438

Biomarker Response to Galactic Cosmic Ray-Induced NOx and the Methane Greenhouse Effect in the Atmosphere of an Earthlike Planet Orbiting an M-Dwarf Star  

E-Print Network [OSTI]

Planets orbiting in the habitable zone (HZ) of M-Dwarf stars are subject to high levels of galactic cosmic rays (GCRs) which produce nitrogen oxides in earthlike atmospheres. We investigate to what extent this NOx may modify biomarker compounds such as ozone (O3) and nitrous oxide (N2O), as well as related compounds such as water (H2O) (essential for life) and methane (CH4) (which has both abiotic and biotic sources) . Our model results suggest that such signals are robust, changing in the M-star world atmospheric column by up to 20% due to the GCR NOx effects compared to an M-star run without GCR effects and can therefore survive at least the effects of galactic cosmic rays. We have not however investigated stellar cosmic rays here. CH4 levels are about 10 times higher than on the Earth related to a lowering in hydroxyl (OH) in response to changes in UV. The increase is less than reported in previous studies. This difference arose partly because we used different biogenic input. For example, we employed 23% ...

Grenfell, J L; Patzer, B; Rauer, H; Segura, A; Stadelmann, A; Stracke, B; Titz, R; Von Paris, P; Grenfell, John Lee; Griessmeier, Jean-Mathias; Patzer, Beate; Rauer, Heike; Segura, Antigona; Stadelmann, Anja; Stracke, Barbara; Titz, Ruth; Paris, Philip von

2007-01-01T23:59:59.000Z

439

NOx Sensor Development  

Broader source: Energy.gov [DOE]

2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation

440

NOx Sensor Development  

Broader source: Energy.gov (indexed) [DOE]

zirconia (PSZ) for better mechanical properties * (bottom) Dense LSM (Strontium-doped lanthanum manganite oxide) with yttria fully- stabilized zirconia (YSZ) for...

Note: This page contains sample records for the topic "nox burners ln" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

NOx Sensor Development  

Broader source: Energy.gov (indexed) [DOE]

needed to meet emission targets and enable widespread use of diesel vehicles with better fuel economies: We are developing a novel sensor with the potential to meet OEM cost and...

442

Reduction of NOx emission on NiCrAl-Titanium Oxide coated direct injection diesel engine fuelled with radish (Raphanus sativus) biodiesel  

Science Journals Connector (OSTI)

The main aim of this study is the experimental investigation of single cylinder DI diesel engine with and without coating. Diesel and radish (Raphanus sativus) oil Methyl Ester are used as fuels and the results are compared to find the effect of biodiesel in a thermal barrier coating engine. For this purpose engine cylinder head valves and piston crown are coated with 100??m of nickel-chrome-aluminium bond coat and 450??m of TiO2 by the plasma spray method. Radish oil methyl ester is produced by the transesterification process method. From the experimental investigation slight increase in specific fuel consumption in thermal barrier coating engine is observed when compared with the uncoated engine whereas NOx HC Smoke and CO emissions decreased with coated engine for all test fuels used in the coated engine when compared with that of the uncoated engine.

V. Ravikumar; D. Senthilkumar

2013-01-01T23:59:59.000Z

443

NOx, SOx and CO2 Emissions Reduction from Continuous Commissioning® (CC®) Measures at the Rent-A-Car Facility in the Dallas-Fort Worth International Airport  

E-Print Network [OSTI]

, and CO2) reduction for year 1999 and the projected ones for 2007 and corresponding OSD periods are presented next. Potential Emissions Reductions for 1999 Potential Emissions Reductions for 2007 Emissions Annual (Tons/yr) OSD (Tons/day) Annual... (Tons/yr) OSD (Tons/day) NOX 3.710320 0.012782 1.64387 0.00554 SO2 N/A N/A 1.11594 0.00362 CO2 N/A N/A 1316.468 4.62669 The potential emissions reduction of SO2 and CO2 for the year 1999 was not evaluated because eGRID tables for that year were...

Baltazar-Cervantes, J. C.; Haberl, J. S.; Yazdani, B.

2006-10-27T23:59:59.000Z

444

Biomarker Response to Galactic Cosmic Ray-Induced NOx and the Methane Greenhouse Effect in the Atmosphere of an Earthlike Planet Orbiting an M-Dwarf Star  

E-Print Network [OSTI]

Planets orbiting in the habitable zone (HZ) of M-Dwarf stars are subject to high levels of galactic cosmic rays (GCRs) which produce nitrogen oxides in earthlike atmospheres. We investigate to what extent this NOx may modify biomarker compounds such as ozone (O3) and nitrous oxide (N2O), as well as related compounds such as water (H2O) (essential for life) and methane (CH4) (which has both abiotic and biotic sources) . Our model results suggest that such signals are robust, changing in the M-star world atmospheric column by up to 20% due to the GCR NOx effects compared to an M-star run without GCR effects and can therefore survive at least the effects of galactic cosmic rays. We have not however investigated stellar cosmic rays here. CH4 levels are about 10 times higher than on the Earth related to a lowering in hydroxyl (OH) in response to changes in UV. The increase is less than reported in previous studies. This difference arose partly because we used different biogenic input. For example, we employed 23% lower CH4 fluxes compared to those studies. Unlike on the Earth, relatively modest changes in these fluxes can lead to larger changes in the concentrations of biomarker and related species on the M-star world. We calculate a CH4 greenhouse heating effect of up to 4K. O3 photochemistry in terms of the smog mechanism and the catalytic loss cycles on the M-star world differs considerably compared with the Earth.

John Lee Grenfell; Jean-Mathias Griessmeier; Beate Patzer; Heike Rauer; Antigona Segura; Anja Stadelmann; Barbara Stracke; Ruth Titz; Philip von Paris

2007-02-23T23:59:59.000Z

445

NETL: Clean Coal Technology Demonstration Program (CCTDP) - Round 3  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Evaluation of Gas Reburning and Low-NOx Burners on a Wall-Fired Boiler - Project Brief [PDF-252KB] Evaluation of Gas Reburning and Low-NOx Burners on a Wall-Fired Boiler - Project Brief [PDF-252KB] Energy and Environmental Research Corp., Denver, CO PROGRAM PUBLICATIONS Final Reports Evaluation of Gas Reburning and Low NOx Burners on a Wall-Fired Boiler: Performance and Economics Report, Gas Reburning-Low NOx Burner System, Cherokee Station Unit No. 3, Final Report [PDF-17.2MB] (July 1998) CCT Reports: Project Performance Summaries, Post-Project Assessments, & Topical Reports Evaluation of Gas Reburning and Low-NOx Burners on a Wall-Fired Boiler: A DOE Assessment [PDF-309KB] (Feb 2001) Reburning Technologies for the Control of Nitrogen Oxides Emissions from Coal-Fired Boilers, Topical Report No.14 [PDF-1.2MB] ((May 1999) Reduction of NOx and SO2 Using Gas Reburning, Sorbent Injection, and Integrated Technologies, Topical Report No. 3 [PDF-1MB] ((Sept 1993)

446

Simulating the Impact of Premixed Charge Compression Ignition on Light-Duty Diesel Fuel Economy and Emissions of Particulates and NOx  

SciTech Connect (OSTI)

We utilize the Powertrain Systems Analysis Toolkit (PSAT) combined with transient engine and aftertreatment component models implemented in Matlab/Simulink to simulate the effect of premixed charge compression ignition (PCCI) on the fuel economy and emissions of light-duty diesel-powered conventional and hybrid electric vehicles (HEVs). Our simulated engine is capable of both conventional diesel combustion (CDC) and premixed charge compression ignition (PCCI) over real transient driving cycles. Our simulated aftertreatment train consists of a diesel oxidation catalyst (DOC), lean NOx trap (LNT), and catalyzed diesel particulate filter (DPF). The results demonstrate that, in the simulated conventional vehicle, PCCI can significantly reduce fuel consumption and emissions by reducing the need for LNT and DPF regeneration. However, the opportunity for PCCI operation in the simulated HEV is limited because the engine typically experiences higher loads and multiple stop-start transients that are outside the allowable PCCI operating range. Thus developing ways of extending the PCCI operating range combined with improved control strategies for engine and emissions control management will be especially important for realizing the potential benefits of PCCI in HEVs.

Gao, Zhiming [ORNL; Daw, C Stuart [ORNL; Wagner, Robert M [ORNL; Edwards, Kevin Dean [ORNL; Smith, David E [ORNL

2013-01-01T23:59:59.000Z

447

Upgrade Boilers with Energy-Efficient Burners  

SciTech Connect (OSTI)

This revised ITP steam tip sheet on upgrading boilers provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

448

Page not found | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

41 - 18350 of 26,764 results. 41 - 18350 of 26,764 results. Page EA-1472: Commercial Demonstration fo the Low Nox Burner/Separated Over-Fire Air (LNB/SOFA) Integration System Emission Reduction Technology, Holcolm Station, Sunflower Electric Power Corporation Finnety County, Kansas The DOE has prepared an Environmental Assessment (EA), to analyze the potential impacts of the commercial application of the Low-NOx Burner/Separated Over-Fire Air (LNB/SOFA) integration system to achieve nitrogen oxide (NOx) emissions reduction at Sunflower's Holcomb Unit No. 1 (Holcomb Station), located near Garden City, in Finney County, Kansas. The Holcomb Station would be modified in three distinct phases to demonstrate the synergistic effect of layering NOx control technologies. http://energy.gov/nepa/ea-1472-commercial-demonstration-fo-low-nox-burnerseparated-over-fire-air-lnbsofa-integration

449

BaO/Al2O3/NiAl(110) Model NOx Storage Materials: the effect of BaO film thickness on the amorphous-to-crystalline Ba(NO3)2 phase transition  

SciTech Connect (OSTI)

The reaction of NO2 with BaO (0.15 – 2 ML and > 30 ML)/Al2O3(12 ML)/NiAl(110) model NOx storage materials was studied. A thick (~12 ML), ordered Al2O3 film was prepared as the support oxide on a NiAl(110) substrate in order to minimize the effect of the intermixing between the two oxide phases (BaO and Al2O3) on the NOx chemistry of BaO. The growth of a thick alumina film, prepared by atomic oxygen deposition onto NiAl(110), follows a layer-by-layer growth mode and the resulting film is much more stable when exposed to NO2 than the ultra-thin alumina films studied before. The interaction of NO2 with the model NOx storage systems at low coverages of BaO show fundamentally different behaviors from a thick BaO film, as nitrite species form at low exposures of NO2, followed by nitrate formation at high NO2 exposures. In contrast, on the thick BaO layer nitrite-nitrate ion pairs form at 300 K under UHV conditions (PNO2 ~ 1 ? 10-9 Torr). However, at elevated NO2 pressures (? 1 ? 10-5 Torr) the thick BaO film is gradually converted into amorphous Ba(NO3)2 at 300 K. Raising the temperature of the samples with ?BaO > 1 ML after NO2 exposure (in the absence of gas phase NO2) leads to the phase transformation of the amorphous Ba(NO3)2 layer into crystalline Ba(NO3)2 particles in the temperature range of 500 – 600 K. No phase transformation is observed in samples with ?BaO < 1 ML.

Yi, Cheol-Woo W.; Szanyi, Janos

2009-01-15T23:59:59.000Z

450

Enhanced ferromagnetic order in Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} featuring canted [MnO{sub 4}]{sub ?} spin chains of mixed-valent Mn(III)/Mn(IV). Aliovalent substitution of the Sr{sub 4?x}Ln{sub x}Mn{sup III}{sub 2+x}Mn{sup IV}{sub 1?x}O{sub 3}(GeO{sub 4}){sub 3} solid-solution  

SciTech Connect (OSTI)

Crystals of Sr{sub 4?x}Ln{sub x}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} (x=0; x?0.15 for Ln=La, Pr, Nd, Sm. Eu, Gd, Dy; x?0.3 for Ln=Gd) were isolated upon using high-temperature, solid-state methods in molten-salt media. These compounds are isostructural with the previously reported Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} (Ln=La, Sm, Gd) series that contains the same [MnO{sub 4}]{sub ?} spin chains. The synthesis of the Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} (x=0) phase was carried out by a double aliovalent substitution with respect to the Sr{sup 2+} and Ge{sup 4+} ions that replace Na{sup +}/Ln{sup 3+} and As{sup 5+} in Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}, respectively. The title series contains mixed-valent Mn(III)/Mn(IV) and shows a limited range of solid solution, both of which were not observed in the previously reported Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} series. To form the Sr{sub 4?x}Ln{sub x}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} solid solution, one of the Sr{sup 2+} sites, i.e., the original Ln-site in Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}, is partially substituted by Ln{sup 3+} in a statistical disorder of Sr{sub 1?x}/Ln{sub x}. Initial magnetic investigations of selected derivatives reveal higher ferromagnetic ordering temperatures than those reported for the Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3} series, presumably attributed to a lesser degree of canting as a result of introducing non-Jahn–Teller Mn{sup 4+} ions. Also intriguing is the observation of multiple anomalies at low temperatures which appear to be of electronic origins. - Graphical abstract: Sr{sub 4?x}Ln{sub x}Mn(III){sub 2+x}Mn(IV){sub 1?x}O{sub 3}(GeO{sub 4}){sub 3}. Display Omitted - Highlights: • Double aliovalent substitution: Sr{sub 4}Mn{sub 3}O{sub 3}(GeO{sub 4}){sub 3} with respect to Na{sub 3}LnMn{sub 3}O{sub 3}(AsO{sub 4}){sub 3}. • Solid solution with respect to statistical disorder of Sr{sub 1?x}Ln{sub x} in one of the two Sr sites. • Mn{sup 3+}/Mn{sup 4+} magnetic ions are spatially arranged in a triangular kagomé fashion. • Enhanced ferromagnetic ordering attributed to doping non-Jahn–Teller Mn{sup 4+}.

West, J. Palmer; Sulejmanovic, Dino [Department of Chemistry, Clemson University, Clemson, SC 29634 (United States); Becht, Gregory [E. I. du Pont, Wilmington, DE 19880-0500 (United States); He, Jian; Hitchcock, Dale [Department of Physics and Astronomy, Clemson University, Clemson, SC 29634 (United States); Yan, Yonggao [Wuhan University of Technology, Wuhan 430070 (China); Hwu, Shiou-Jyh, E-mail: shwu@clemson.edu [Department of Chemistry, Clemson University, Clemson, SC 29634 (United States)

2013-10-15T23:59:59.000Z

451

Synthesis, structure, magnetism, and optical properties of the ordered mixed-lanthanide sulfides gamma-LnLn'S3 (Ln=La, Ce; Ln'=Er, Tm, Yb)  

E-Print Network [OSTI]

Syntheses, Structure, Magnetism, and Optical Properties ofcan be changed as Magnetism, and Optical a function of theSusceptibility Measurements. Magnetism data were measured on

2008-01-01T23:59:59.000Z

452

EA-1472: Finding of No Significant Impact | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Finding of No Significant Impact Finding of No Significant Impact EA-1472: Finding of No Significant Impact Commercial Demonstration fo the Low Nox Burner/Separated Over-Fire Air (LNB/SOFA) Integration System Emission Reduction Technology, Holcolm Station, Sunflower Electric Power Corporation Finnety County, Kansas The DOE has prepared an Environmental Assessment (EA), to analyze the potential impacts of the commercial application of the Low-NOx Burner/Separated Over-Fire Air (LNB/SOFA) integration system to achieve nitrogen oxide (NOx) emissions reduction at Sunflower's Holcomb Unit No. 1 (Holcomb Station), located near Garden City, in Finney County, Kansas. The Holcomb Station would be modified in three distinct phases to demonstrate the synergistic effect of layering NOx control technologies.

453

Atmospheric pressure gas plasma-induced colorectal cancer cell death is mediated by Nox2–ASK1 apoptosis pathways and oxidative stress is mitigated by Srx–Nrf2 anti-oxidant system  

Science Journals Connector (OSTI)

Abstract Atmospheric pressure gas plasma (AGP) generates reactive oxygen species (ROS) that induce apoptosis in cultured cancer cells. The majority of cancer cells develop a ROS-scavenging anti-oxidant system regulated by Nrf2, which confers resistance to ROS-mediated cancer cell death. Generation of ROS is involved in the AGP-induced cancer cell death of several colorectal cancer cells (Caco2, HCT116 and SW480) by activation of ASK1-mediated apoptosis signaling pathway without affecting control cells (human colonic sub-epithelial myofibroblasts; CO18, human fetal lung fibroblast; MRC5 and fetal human colon; FHC). However, the identity of an oxidase participating in AGP-induced cancer cell death is unknown. Here, we report that AGP up-regulates the expression of Nox2 (NADPH oxidase) to produce ROS. RNA interference designed to target Nox2 effectively inhibits the AGP-induced ROS production and cancer cell death. In some cases both colorectal cancer HT29 and control cells showed resistance to AGP treatment. Compared to AGP-sensitive Caco2 cells, HT29 cells show a higher basal level of the anti-oxidant system transcriptional regulator Nrf2 and its target protein sulfiredoxin (Srx) which are involved in cellular redox homeostasis. Silencing of both Nrf2 and Srx sensitized HT29 cells, leads to ROS overproduction and decreased cell viability. This indicates that in HT29 cells, Nrf2/Srx axis is a protective factor against AGP-induced oxidative stress. The inhibition of Nrf2/Srx signaling should be considered as a central target in drug-resistant colorectal cancer treatments.

Musarat Ishaq; Margaret D.M. Evans; Kostya (Ken) Ostrikov

2014-01-01T23:59:59.000Z

454

CALIFORNIA ENERGY COMMISSION Loan Application Announcement  

E-Print Network [OSTI]

, solar photo voltaic (PV) and solar thermal systems, utilization of food and animal waste for bio-low NOx Controlled Energy Efficient Burners Heating and Cooling Topping Cycle Systems Solar PV and Solar Thermal Systems Utilization of Food and Animal Waste for Bio-Energy Generation Proposed projects must

455

EA-1472: Final Environmental Assessment | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Final Environmental Assessment Final Environmental Assessment EA-1472: Final Environmental Assessment Commercial Demonstration fo the Low Nox Burner/Separated Over-Fire Air (LNB/SOFA) Integration System Emission Reduction Technology, Holcolm Station, Sunflower Electric Power Corporation, Finnety County, Kansas This EA evaluates DOE's proposal to provide partial funding to the Sunflower Electric Power Corporation (Sunflower), to demonstrate the commerical application of Low-NOx Burner/Separated Over-Fire Air (LNB/SOFA) integration system to achieve NOx emission reduction to the level of 0.15 to 0.22 pounds per million British thermal units (lb/MM Btu). EA-1472-FEA-2003.pdf More Documents & Publications EA-1472: Finding of No Significant Impact PIA - Sunflower (BPA) CX-006850: Categorical Exclusion Determination

456

Scalable, Efficient Solid Waste Burner System - Energy Innovation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

combustion experts at CSU, the device is superior to other systems and achieves improved gasification and combustion of biomass and waste through novel chassis design and process....

457

Reduction of Weapon Grade Plutonium Inventories in a Thorium Burner  

Science Journals Connector (OSTI)

Fusion-Fission Hybrids and Transmutation / Proceedings of the Fifteenth International Conference on Emerging Nuclear Energy Systems

Sümer Sahin; Haci Mehmet Sahin; Adem Acir

458

The Front Burner Cybersecurity The ACIO for Cybersecurity  

Broader source: Energy.gov (indexed) [DOE]

cyberspace. Individual actions have a collective impact, and safe use of the Internet makes it more secure for everyone. If all Americans do their part by implementing...

459

Saving Energy and Reducing Emissions with Fuel-Flexible Burners  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

using biomass-derived liquid fuels, such as glycerin or fatty acids, as a substitute for natural gas, thereby reducing energy consumption, lowering greenhouse gas emissions, and...

460

Syngas and hydrogen production in a volumetric radiant burner  

Science Journals Connector (OSTI)

The production of syngas is the most energy demanding and metal consuming stage in the conversion of gaseous hydrocarbons (GH's) into value-added products. Its complexity restrains many practical applications of chemical processing of GH's, especially for low scale of operation. The paper describes new compact and highly productive generator of syngas and hydrogen based on the combustion of GH's in volumetric permeable matrixes with locked IR radiation that can serve as a solution of this problem. It is shown that such simple devices can provide a highly efficient methane conversion into syngas and thus facilitate the utilization of low-capacity sources of GH's for economically feasible low scale syngas and hydrogen production from various local hydrocarbon sources.

V.S. Arutyunov; V.M. Shmelev; M. Yu Sinev; O.V. Shapovalova

2011-01-01T23:59:59.000Z