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Note: This page contains sample records for the topic "oxy-fuel combustion cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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1

Carbonation of Fly Ash in Oxy-fuel CFB Combustion  

Science Journals Connector (OSTI)

Oxy-fuel combustion of fossil fuel is one of the most promising methods to produce a stream of concentrated CO2 ready for sequestration. Oxy-fuel FBC (fluidized bed combustion) can use limestone as a sorbent for

Chunbo Wang; Lufei Jia; Yewen Tan…

2007-01-01T23:59:59.000Z

2

Dynamic stability, blowoff, and flame characteristics of oxy-fuel combustion  

E-Print Network [OSTI]

Oxy-fuel combustion is a promising technology to implement carbon capture and sequestration for energy conversion to electricity in power plants that burn fossil fuels. In oxy-fuel combustion, air separation is used to ...

Shroll, Andrew Philip

2011-01-01T23:59:59.000Z

3

A fundamental study of biomass oxy-fuel combustion and co-combustion.  

E-Print Network [OSTI]

??While oxy-fuel combustion research is developing and large scale projects are proceeding, little information is available on oxy-biomass combustion and cocombustion with coal. To address… (more)

Farrow, Timipere Salome

2013-01-01T23:59:59.000Z

4

ORIGINAL PAPER Fireside Corrosion in Oxy-fuel Combustion of Coal  

E-Print Network [OSTI]

ORIGINAL PAPER Fireside Corrosion in Oxy-fuel Combustion of Coal Gordon R. Holcomb · Joseph Tylczak the nature of coal ash deposits. Wigley and Goh [1] reported that particles in oxy-fired deposits, compared

Laughlin, David E.

5

The potential for clean energy production using oxy-fuel combustion and integrated pollutant removal  

SciTech Connect (OSTI)

Effective remediation of flue gas produced by an oxy-fuel coal combustion process has been proven at bench scale in the course of cooperative research between USDOE’s Albany Research Center (ARC) and Jupiter Oxygen Corporation. All combustion gas pollutants were captured, including CO2 which was compressed to a liquefied state suitable for sequestration. Current laboratory-scale research and the future of combined oxy-fuel/IPR systems are discussed.

Ochs, Thomas L.; Oryshchyn, Danylo B.; Weber, Thomas (Jupiter Oxygen Corporation, Schiller Park, IL 60176).; Summers, Cathy A.

2005-05-01T23:59:59.000Z

6

Sulphur impacts during pulverised coal combustion in oxy-fuel technology for carbon capture and storage  

Science Journals Connector (OSTI)

The oxy-fuel process is one of three carbon capture technologies which supply CO2 ready for sequestration – the others being post-combustion capture and IGCC with carbon capture. As yet no technology has emerged as a clear winner in the race to commercial deployment. The oxy-fuel process relies on recycled flue gas as the main heat carrier through the boiler and results in significantly different flue gas compositions. Sulphur has been shown in the study to have impacts in the furnace, during ash collection, CO2 compression and transport as well as storage, with many options for its removal or impact control. In particular, the effect of sulphur containing species can pose a risk for corrosion throughout the plant and transport pipelines. This paper presents a technical review of all laboratory and pilot work to identify impacts of sulphur impurities from throughout the oxy-fuel process, from combustion, gas cleaning, compression to sequestration with removal and remedial options. An economic assessment of the optimum removal is not considered. Recent oxy-fuel pilot trials performed in support of the Callide Oxy-fuel Project and other pilot scale data are interpreted and combined with thermodynamic simulations to develop a greater fundamental understanding of the changes incurred by recycling the flue gas. The simulations include a sensitivity analysis of process variables and comparisons between air fired and oxy-fuel fired conditions - such as combustion products, SO3 conversion and limestone addition.

Rohan Stanger; Terry Wall

2011-01-01T23:59:59.000Z

7

Modelling the Fate of Sulphur During Pulverized Coal Combustion under Conventional and Oxy-fuel Conditions  

Science Journals Connector (OSTI)

Abstract Focus of the present study is on the fate of sulphur during coal combustion and modelling of the corresponding \\{SOx\\} formation mechanisms. The sulphur chemistry during coal combustion in general is briefly described and potential effects of the oxy-fuel conditions are explained. Details about the developed sulphur chemistry model which covers both heterogeneous and homogeneous reaction pathways are given. The model describes the sulphur transformation in a sequence of stages: the release of coal-bound sulphur, gas phase reactions of sulphuric species, and self-retention of sulphur oxides by coal ash. The model is evaluated against experimental data from IFK's semi-industrial scale furnace (500 kWth) firing lignite at conventional and oxy-fuel combustion conditions. Four reference cases are considered, i.e. air and oxy-fuel mode in both non-staged and staged operation. Based on the results from the basic combustion simulation with AIOLOS, the sulphur chemistry model has been applied in a subsequent post-processing step. The sulphur related results show that the general trends regarding the species concentrations may be predicted correctly. The specific characteristics and the effect of oxy-fuel conditions and oxidant staging are captured correspondingly within the simulation results. Yet, certain deficiencies concerning the quantitative prediction could be identified which necessitate further investigations.

Michael Müller; Uwe Schnell; Günter Scheffknecht

2013-01-01T23:59:59.000Z

8

GRH 12-01 Fireside Corrosion in Oxy-fuel Combustion Poster 0108  

SciTech Connect (OSTI)

The goals are to: (1) Achieve 90% CO{sub 2} capture at no more than a 35% increase in levelized cost of electricity of post-combustion capture for new and existing conventional coal-fired power plants; (2) Provide high-temperature corrosion information to aid in materials development and selection for oxy-fuel combustion; and (3) Identify corrosion mechanism and behavior differences between air- and oxy-firing.

G. R. Holcomb; J. Tylczak; G. H. Meier; B. Lutz; K. Jung; N. Mu; N. M. Yanar; F. S. Pettit; J. Zhu; A. Wise; D. Laughlin; S. Sridhar

2012-05-20T23:59:59.000Z

9

Developments in integrated pollutant removal for low-emission oxy-fuel combustion  

SciTech Connect (OSTI)

A complete coal combustion and flue gas treatment scheme was designed, constructed, and operated at bench scale as a product of cooperative research between US DOE’s Albany Research Center (ARC) and Jupiter Oxygen Corporation. The combustion gas generated using this oxy-fuel coal combustion process was effectively captured using an integrated pollutant removal (IPR) process. Supporting laboratory-scale research focuses on elements of IPR such as extraction of particulates, SO2, and mercury, and on the character of the liquid and vapor phase compositions for the CO2 - N2 - O2 mixture at the temperature and pressure conditions found at the end of the process. Future pilot-scale work will be necessary to generate economic and engineering data that will apply to full-scale oxy-fuel/IPR systems.

Gerdemann, Stephen J.; Summers, Cathy A.; Oryshchyn, Danylo B.; Patrick, Brian (Jupiter Oxygen Corp.); Ochs, Thomas L.

2005-09-01T23:59:59.000Z

10

Thermo economic evaluation of oxy fuel combustion cycle in Kazeroon power plant considering enhanced oil recovery revenues  

Science Journals Connector (OSTI)

Oxy fuel combustion and conventional cycle (currently working cycle ... for enhanced oil recovery in the various oil price indices is conducted and indices net present ... models reveal that gross efficiency of t...

Ehsan Torabnejad; Ramin Haghighi-Khoshkhoo…

2014-03-01T23:59:59.000Z

11

OXY-fuel Combustion at the CANMET Vertical Combustor Research Faciltiy  

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

OXY-FUEL COMBUSTION OXY-FUEL COMBUSTION At the CANMET Vertical Combustor Research Facility M.A.Douglas 1 ( madougla@nrcan.gc.ca ; +001-613-996-2761) E. Chui ( echui@nrcan.gc.ca ; +001-613-943-1774) Y. Tan ( ytan@nrcan.gc.ca ; +001-613-992- 8150) G. K. Lee 2 ( gklee@magma.ca ; +001-613-829-3845) E. Croiset 3 ( ecroiset@uwaterloo.ca ; +001-519-888-4567-ext 6472) K. V. Thambimuthu 4 ( kelly.thambimuthu@nrcan.gc.ca ) CANMET Energy Technology Centre, Natural Resources Canada, 1 Haanel Dr., Ottawa, Ontario, Canada, K1A 1M1 ABSTRACT The CANMET Energy Technology Center is a division of Natural Resources Canada and undertakes primary research and technology development activities for the benefit of Canadians and a wide range of external clients. The Vertical Combustor Research Facility (VCRF) was built in 1994 and is CANMET's

12

Oxy-fuel Combustion and Integrated Pollutant Removal as Retrofit Technologies for Removing CO2 from Coal Fired Power Plants  

SciTech Connect (OSTI)

One third of the US installed capacity is coal-fired, producing 49.7% of net electric generation in 20051. Any approach to curbing CO2 production must consider the installed capacity and provide a mechanism for preserving this resource while meeting CO2 reduction goals. One promising approach to both new generation and retrofit is oxy-fuel combustion. Using oxygen instead of air as the oxidizer in a boiler provides a concentrated CO2 combustion product for processing into a sequestration-ready fluid.... Post-combustion carbon capture and oxy-fuel combustion paired with a compression capture technology such as IPR are both candidates for retrofitting pc combustion plants to meet carbon emission limits. This paper will focus on oxy-fuel combustion as applied to existing coal power plants.

Ochs, T.L.; Oryshchyn, D.B.; Summers, C.A.; Gerdemann, S.J.

2001-01-01T23:59:59.000Z

13

Air and oxy-fuel combustion behaviour of petcoke/lignite blends  

Science Journals Connector (OSTI)

The pyrolysis and combustion behaviour of a petroleum coke (petcoke), an indigenous lignite and their 70/30 wt.% blend in air and oxy-fuel conditions were investigated by using non-isothermal thermo-gravimetric method (TGA) coupled with Fourier transform infrared (FTIR) spectrometer. Blend samples were prepared by mixing lignite, which has low calorific value, high ash and moisture contents with petcoke that has high calorific value, low ash and moisture content, in the proportion of 70:30. Pyrolysis tests were carried out in nitrogen and carbon dioxide environments which are the main diluting gases of air and oxy-fuel environments, respectively. Pyrolysis curves of parent fuels and their blend reveal close resemblance up to 700 °C in both N2 and CO2 environments. At higher temperatures, further weight loss taking place in N2 and CO2 atmospheres is attributed to calcite decomposition and CO2-char gasification reaction, respectively. Gasification reaction leads to significant increase in CO and COS formation as observed in FTIR evolution profiles. Almost identical experimental and theoretical pyrolysis profiles of the blend samples show that there is no synergy between the parent fuels of the blend in both pyrolysis environments. Combustion experiments were carried out in four different atmospheres; air, oxygen-enriched air environment (30% O2–70% N2), oxy-fuel environment (21% O2–79% CO2) and oxygen-enriched oxy-fuel environment (30% O2–70% CO2). Combustion experiments show that replacing nitrogen in the gas mixture by the same concentration of CO2 leads to delay in combustion (lower maximum rate of weight loss and higher burnout temperatures). Overall comparison of derivative thermogravimetry (DTG) profiles shows that effect of oxygen content on combustion characteristics is more significant than that of diluting gas in the combustion environment. At elevated oxygen levels, profiles shift through lower temperature zone, peak and burnout temperatures decrease, weight loss rate increases significantly and complete combustion is achieved at lower temperatures and shorter times. Theoretical and experimental combustion profiles of the blend mainly display different trends, which indicate synergistic interactions between lignite and petcoke during their combustion in different environments.

Nur Sena Yuzbasi; Nevin Selçuk

2012-01-01T23:59:59.000Z

14

Oxy-fuel combustion systems for pollution free coal fired power generation  

SciTech Connect (OSTI)

Jupiter Oxygen's patented oxy-fuel combustion systems1 are capable of economically generating power from coal with ultra-low emissions and increased boiler efficiency. Jupiter's system uses pure oxygen as the combustion agent, excluding air and thus nitrogen, concentrating CO2 and pollutants for efficient capture with near zero NOx production, reducing exhaust mass flow, and increasing radiant heat transfer. Flue-gas recirculation rates can be varied to add flexibility to new boiler designs using this technology. Computer modeling and thermal analysis have identified important design considerations in retrofit applications.

Ochs, Thomas L.; Oryshchyn, Danylo B.; Gross, Dietrich (Jupiter Oxygen Corp.); Patrick, Brian (Jupiter Oxygen Corp.); Gross, Alex (Jupiter Oxygen Corp.); Dogan, Cindy; Summers, Cathy A.; Simmons, William (CoalTeck LLC); Schoenfeld, Mark (Jupiter Oxygen Corp.)

2004-01-01T23:59:59.000Z

15

Nitrogen Oxides, Sulphur Trioxide and Mercury Emissions during Oxy-Fuel Fluidized Bed Combustion of Victorian Brown Coal  

Science Journals Connector (OSTI)

This study investigates, for the first time, the NOX, N2O, SO3 and Hg emissions from combustion of a Victorian brown coal in a 10 kWth fluidized bed unit under oxy-fuel combustion conditions. Compared to air combustion, lower NOX emissions and higher N2O ...

Bithi Roy; Luguang Chen; Sankar Bhattacharya

2014-11-17T23:59:59.000Z

16

Oxy-fuel Combustion of Ethanol in Premixed Flames  

Science Journals Connector (OSTI)

(11-14) First, measurements using a heat flux setup for liquid fuels were studied on ethanol + air combustion. ... The heat flux method builds on the principle that heat is transferred to the unburnt gas, cooling the plate, while heat transfer from the flame heats the plate. ... A detailed kinetic scheme was compiled using known data on EtOH kinetics and is self-consistent in that it closely predicts laminar flame speed of EtOH, CH4, MeOH, and C2-hydrocarbons. ...

Jenny D. Nauclér; Moah Christensen; Elna J. K. Nilsson; Alexander A. Konnov

2012-06-19T23:59:59.000Z

17

An Integrated Approach for Oxy-fuel Combustion with CO2 Capture and Compression  

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

Vent Stream Vent Stream (out) CO 2 Product Stream (out) Flue Gas Stream (in) CO 2 CCU Skid Government of Canada Gouvernement du Canada An Integrated Approach for Oxy An Integrated Approach for Oxy- -fuel Combustion with CO fuel Combustion with CO 2 2 Capture and Capture and Compression Compression Kourosh Zanganeh, Ahmed Shafeen, and Carlos Salvador Zero-Emission Technologies Group, Clean Electric Power Generation CANMET CO 2 R&D Consortium CANMET Energy Technology Centre - Ottawa The capture and storage or reuse of carbon dioxide (CO 2 ) from the combustion of fossil fuels as well as industrial off gases represents an opportunity to achieve a significant reduction in anthropogenic greenhouse gas (GHG) emissions. Fossil fuel combustion is expected to dominate the energy structure in at least the next few decades.

18

Numerical Modelling of Oxy-Fuel Combustion in a Full-Scale Tangentially-Fired Pulverised Coal Boiler  

Science Journals Connector (OSTI)

Abstract This paper presents a computational fluid dynamics (CFD) modelling study to investigate Victorian brown coal combustion in a 550 MW utility boiler under the air-fired (standard) and three oxy-fuel-fired cases. The standard case was modelled based on the real operating conditions of Loy Yang A power plant located in the state of Victoria, Australia. A level of confidence of the present CFD model was achieved validating four parameters of the standard combustion case, as well as the previous preliminary CFD studies which were conducted on a lab-scale (100 kW) unit firing lignite and propane under oxy-fuel-fired scenarios. The oxy-fuel combustion cases are known as OF25 (25vol. % O2 concentration), OF27 (27vol. % O2 concentration), and OF29 (29vol. % O2 concentration). The predictions of OF29 combustion case were considerably similar to the standard firing results in terms of gas temperature levels and radiative heat transfer compared with OF25 and OF27 combustion scenarios. This similarity was because of increasing the residence time of pulverised coal (PC) in the combustion zone and O2 concentration in feed oxidizer gases. Furthermore, a significant increase in the CO2 concentrations and a noticeable decrease in the nitric oxides (NOx) formation were noted under all oxy-fuel combustion conditions. This numerical study of oxy-fuel combustion in a full-scale tangentially-fired PC boiler is important prior to its execution in real-life power plants.

Audai Hussein Al-Abbas; Jamal Naser; David Dodds; Aaron Blicblau

2013-01-01T23:59:59.000Z

19

Combustion of single biomass particles in air and in oxy-fuel conditions  

Science Journals Connector (OSTI)

Abstract The combustion behaviors of four different pulverized biomasses were evaluated in the laboratory. Single particles of sugarcane bagasse, pine sawdust, torrefied pine sawdust and olive residue were burned in a drop-tube furnace, set at 1400 K, in both air and O2/CO2 atmospheres containing 21, 30, 35, and 50% oxygen mole fractions. High-speed and high-resolution images of single particles were recorded cinematographically and temperature–time histories were obtained pyrometrically. Combustion of these particles took place in two phases. Initially, volatiles evolved and burned in spherical envelope flames of low-luminosity; then, upon extinction of these flames, char residues ignited and burned in brief periods of time. This behavior was shared by all four biomasses of this study, and only small differences among them were evident based on their origin, type and pre-treatment. Volatile flames of biomass particles were much less sooty than those of previously burned coal particles of analogous size and char combustion durations were briefer. Replacing the background N2 gas with CO2, i.e., changing from air to an oxy-fuel atmosphere, at 21% O2 impaired the intensity of combustion; reduced the combustion temperatures and lengthened the burnout times of the biomass particles. Increasing the oxygen mole fraction in CO2 to 28–35% restored the combustion intensity of the single biomass particles to that in air.

Juan Riaza; Reza Khatami; Yiannis A. Levendis; Lucía Álvarez; María V. Gil; Covadonga Pevida; Fernando Rubiera; José J. Pis

2014-01-01T23:59:59.000Z

20

PhD Thesis: Control issues in oxy-fuel combustion  

E-Print Network [OSTI]

attractive concept to achieve CO2 capture by use of oxy-fuel, is a semi-closed oxy-fuel gas turbine cycle of CO2 resulting from human activities. Emissions of CO2 are considered to be the main cause, the emissions of CO2 must be reduced in a timely fashion. Strategies to achieve this include switching to less

Foss, Bjarne A.

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Operational and environmental benefits of oxy-fuel combustion in the steel industry  

SciTech Connect (OSTI)

Due to the high flame temperature of conventional oxygen-fuel burners, these burners have typically not been used in reheat furnaces where temperature uniformity is critical. Praxair has developed a number of burners and associated control systems that have been successfully operated in a variety of reheat furnaces beginning in 1980. The burners have also recently been used for ladle preheating. All burners have been operated with 100% oxygen. The patented burners have designs that result in flame temperatures equivalent to conventional air-fuel burners. Flexible flame patterns are possible, resulting in uniform temperature distribution. In addition, the low flame temperature combined with minimal nitrogen in the furnace results in very low NO{sub x} emissions. The design of the control systems insure safe and reliable operation. In the following sections, oxygen-fuel combustion will be described, with a discussion of fuel savings and other benefits. Unique designs will be discussed along with the features which make them applicable to reheat applications and which result in lower emissions. Other equipment provided with the burners to complete the oxy-fuel combustion system will be described briefly. There will also be a short discussion of how both the fuel and oxygen price can affect the economics of fuel saving. Results from the commercial retrofit installations in continuous and batch reheat furnaces, soaking pits and ladle preheaters will be described. Finally, NO{sub x} emissions data will be discussed.

Farrell, L.M. [Praxair, Inc., Tarrytown, NY (United States); Pavlack, T.T. [Praxair, Inc., East Chicago, IN (United States); Rich, L. [North American Manufacturing Co., Coraopolis, PA (United States)

1995-03-01T23:59:59.000Z

22

CFD modelling of air-fired and oxy-fuel combustion in a large-scale furnace at Loy Yang A brown coal power station  

Science Journals Connector (OSTI)

Oxy-fuel combustion technique is a viable option to reduce several types of greenhouse gases (GHGs) emissions from the pulverized coal (PC) combustion systems. In this paper, a computational fluid dynamics (CFD) modelling study has been developed in order to investigate the Victorian brown coal combustion in a 550 MW utility boiler under the air-fired (reference case) and three oxy-fuel-fired scenarios. The reference firing case was modelled based on the operating conditions of Loy Yang A power plant located in the state of Victoria, Australia. While Chalmers’ oxy-fuel combustion approach was selected for the present oxy-fuel combustion simulations, which referred to as OF25 (25 vol.% O2), OF27 (27 vol.% O2), and OF29 (29 vol.% O2). User-defined functions (UDFs) were written and incorporated into the CFD code to calculate the following mathematical models: the PC devolatilization, char burnout, multi-step chemical reactions, mass and heat transfer, carbon in fly-ash, and \\{NOx\\} formation/destruction. A level of confidence of the CFD model was achieved validating four different parameters of the conventional combustion case, as well as the previous preliminary CFD studies that conducted on a 100 kW unit firing propane and lignite under oxy-fuel combustion environments. The numerical results of OF29 combustion condition were considerably similar to the reference firing results in terms of gas temperature levels and radiative heat transfer relative to the OF25 and OF27 combustion cases. This similarity was due to increasing the residence time of PC in the combustion zone and O2-enriched in feed oxidizer gases. A significant increase in the CO2 concentrations and a noticeable decrease in the \\{NOx\\} formation were observed under all oxy-fuel combustion scenarios. The combustion chemistry was adopted in these investigations in order to capture the effects of O2 concentrations and gas temperatures on the CO/CO2 production rate and equilibrium between H2 and H2O in the combustion zone. Also, the use of O2-enriched atmospheres during oxy-fuel-fired cases was slightly enhanced the carbon burnout rate. These predicted results were reasonably consistent with the experimental investigations and numerical modelling found in the literature. This study of Victorian brown coal oxy-fuel combustion in a large-scale tangentially-fired boiler is important prior to its implementation in real-life.

Audai Hussein Al-Abbas; Jamal Naser; David Dodds

2012-01-01T23:59:59.000Z

23

Corrosion performance of structural alloys for oxy-fuel combustion systems.  

SciTech Connect (OSTI)

The U.S. Department of Energy (DOE) Office of Fossil Energy is intensely promoting research and development of oxyfuel combustion systems that employ oxygen, instead of air, for burning the fuel. The resulting flue gas primarily consists of H{sub 2}O and CO{sub 2} that facilitates sequestration of CO{sub 2}, thereby leading to reduction in CO{sub 2} emissions. Also, as the oxidant is bereft of N{sub 2}, NO{sub x} emissions are minimized to a great extent from the exhaust gas. Studies at NETL have indicated that oxy-fuel combustion can increase efficiency in the power plants from the current 30-35% to 50-60%. However, the presence of H{sub 2}O/CO{sub 2} and trace constituents like nitrogen and sulfur in the environment at the operating temperatures and pressures can have adverse effects on the corrosion and mechanical properties of structural alloys. Thus, there is a critical need to evaluate the response of structural and turbine materials in simulated H{sub 2}O/CO{sub 2} environments in an effort to select materials that have adequate high temperature mechanical properties and environmental performance. During the past year, a program was initiated to evaluate the corrosion performance of structural alloys in CO{sub 2} and CO{sub 2}-steam environments at elevated temperatures. Materials selected for the study include intermediate-chromium ferritic steels, Fe-Cr-Ni heat-resistant alloys, and nickelbased superalloys. Coupon specimens of several of the alloys were exposed to pure CO{sub 2} at temperatures between 650 and 850C for times up to 1450 h. The corrosion tests in CO{sub 2}-50% steam environment was conducted at temperatures between 650 and 850C for times up to 1250 h. The steam for the experiment was generated by pumping distilled water and converting it to steam in the preheat portion of the furnace, ahead of the specimen exposure location. Preliminary results will be presented on weight change, scale thickness, internal penetration, and microstructural characteristics of corrosion products.

Natesan, K.; Rink, D. L.; Nuclear Engineering Division

2007-01-01T23:59:59.000Z

24

The effect of wood biomass blending with pulverized coal on combustion characteristics under oxy-fuel condition  

Science Journals Connector (OSTI)

Abstract In this study, combustion from the co-firing of coal and wood biomass, and thermal characteristics such as ignition temperature, burn-out temperature, and activation energy were discussed using a thermogravimetric analyzer (TGA). We investigated the effects of biomass blending with two kinds of pulverized coal (bituminous Shenhua, and sub-bituminous Adaro) under air and oxy-fuel conditions. The coal fraction in the blended samples was set to 1, 0.8, and 0.5. The oxygen fraction in the oxidant was set to 0.21, 0.3, 0.5, and 0.8. The ignition temperature was governed by the fuel composition, particularly in the blended biomass which has a much higher content of volatile matter comparing to coal. However, the burnout temperature, which shows a strong relationship with char combustion, depended on the oxidant ingredients rather than on the fuel components. Thermal characteristics such as ignition, burnout temperature, reaction region, and heat flow were very similar between air and a 0.3 oxygen concentration under oxy-fuel conditions with Shenhua coal.

Seongyool Ahn; Gyungmin Choi; Duckjool Kim

2014-01-01T23:59:59.000Z

25

NETL: Turbines - Oxy-Fuel Turbines  

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

Oxy-Fuel Turbines Oxy-Fuel Turbines Oxy-fuel combustion potentially can be used in plants based on both conventional and advanced technology. Studies have shown that plants equipped with oxy-fuel systems could reach nominal efficiencies in the 30 percent range with today's steam turbines when fueled with natural gas and when capturing the CO2. With anticipated advances in gasification, oxygen separation, and steam turbine technology, plants using oxy-fuel systems are expected to achieve efficiencies in the mid-40 percent range, with near-100 percent CO2 capture and near-zero NOx emissions. By 2012: In the near-term, efforts are focused on the development of oxy- fuel turbine and combustor technologies for highly efficient (50-60 percent), near-zero emissions, coal-based power systems

26

Proof of concept for integrating oxy-fuel combustion and the removal of all pollutants from a coal fired flame  

SciTech Connect (OSTI)

The USDOE/Albany Research Center and Jupiter Oxygen Corporation, working together under a Cooperative Research and Development Agreement, have demonstrated proof-of-concept for the integration of Jupiter’s oxy-fuel combustion and an integrated system for the removal of all stack pollutants, including CO2, from a coal-fired flame. The components were developed using existing process technology with the addition of a new oxy-coal combustion nozzle. The results of the test showed that the system can capture SOx, NOx, particulates, and even mercury as a part of the process of producing liquefied CO2 for sequestration. This is part of an ongoing research project to explore alternative methods for CO2 capture that will be applicable to both retrofit and new plant construction.

Ochs, Thomas L.; Patrick, Brian (Jupiter Oxygen Corp.); Oryshchyn, Danylo B.; Gross, Alex (Jupiter Oxygen Corp.); Summers, Cathy A.; Simmons, William (CoalTeck LLC); Schoenfield, Mark (Jupiter Oxygen Corp.); Turner, Paul C.

2005-01-01T23:59:59.000Z

27

Operational and environmental benefits of oxy-fuel combustion in the steel industry  

SciTech Connect (OSTI)

A number of patented, field-tested 100% oxy-fuel burner systems have been developed which provide fuel savings, reduced emissions (CO[sub 2] and NO[sub x]) and improved operational performances. These systems can be applied to high-temperature continuous and batch reheat furnaces, soaking pits and ladle preheaters. Fuel consumption and carbon dioxide and NO[sub x] emissions can be reduced by 40 to 60%. Burner design (including nonwater cooled models), commercial experience, measured and projected emissions reductions, and additional operating benefits associated with new and retrofitted applications are described.

Farrell, L.M. (Praxair, Inc., Tarrytown, NY (United States)); Pavlack, T.T. (Praxair, Inc., East Chicago, IN (United States). Linde Division); Rich, L. (North American Mfg. Co., Coraopolis, PA (United States))

1993-07-01T23:59:59.000Z

28

Process simulation of oxy-fuel combustion for a 300 MW pulverized coal-fired power plant using Aspen Plus  

Science Journals Connector (OSTI)

Abstract This work focuses on the amounts and components of flue gas for oxy-fuel combustion in a coal-fired power plant (CFPP). The combustion process of pulverized coal in a 300 MW power plant is studied using Aspen Plus software. The amount of each component in flue gas in coal-fired processes with air or O2/CO2 as oxidizer is obtained. The differences between the two processes are identified, and the influences of temperature, excess oxygen ratio and molar fraction of O2/CO2 on the proportions of different components in flue gas are examined by sensitivity analysis. The process simulation results show that replacing atmospheric air by a 21%O2/79%CO2 mixture leads the decrease of the flame temperature from 1789 °C to 1395 °C. The equilibrium amount of \\{NOx\\} declines obviously but the \\{SOx\\} are still at the same level. The mass fraction of CO2 in flue gas increased from 21.3% to 81.5%. The amount of \\{NOx\\} is affected sensitively by the change of temperature and the excess oxygen ratio, but the change of O2/CO2 molar fraction has a little influence to the generation of NOx. With the increasing of O2 concentration, the flame temperature and \\{NOx\\} emission enhance rapidly. When the molar fraction of O2 increases to 30%, the flame temperature is similar and the mass fraction of \\{NOx\\} is about 1/8 of that air atmosphere.

Xiaohui Pei; Boshu He; Linbo Yan; Chaojun Wang; Weining Song; Jingge Song

2013-01-01T23:59:59.000Z

29

Detailed analysis of the CO oxidation chemistry around a coal char particle under conventional and oxy-fuel combustion conditions  

Science Journals Connector (OSTI)

Abstract The purpose of this article is to analyze in detail the homogeneous chemistry involving the CO oxidation in the gas around a burning char particle. Namely, the model presented in a previous work (Gonzalo-Tirado et al., 2014) [1] has been applied to the case of a 120 ?m and a 600 ?m subbituminous char particle in a 24% O2, 1673 K atmosphere under both conventional and oxy-fuel combustion conditions. The CO + OH ? CO2 + H reaction is shown to be the prevailing reaction in the conversion of the CO in the boundary layer; the high CO2 concentrations typical of oxy-combustion affect the equilibrium in this reaction and reduce its overall rate, which explains the lower ‘intensity’ of the flame in those conditions. As for the release/absorption of heat in the gas, the reactions in which the OH radicals participate as reactants or products are predominant; the OH chemistry is somehow more intense in N2 and higher flame temperatures and OH concentrations are thus attained in conventional combustion conditions. Relatively low moisture concentrations in the bulk gas are sufficient to activate this boundary layer chemistry; with [H2O] larger than ?3% no substantial changes are observed in the CO conversion. The combustion history of the particles has been also studied. A logical sequence oxidation–gasification is observed; whereas the CO-to-CO2 oxidation occurs first contiguous to the particle, the onset of char-CO2 gasification results in a detachment of the flame from the surface and a decrease in the oxidation rate, especially for large particles.

Cristina Gonzalo-Tirado; Santiago Jiménez

2014-01-01T23:59:59.000Z

30

Thermodynamic analysis and comparison on oxy-fuel power generation process - article no. 053001  

SciTech Connect (OSTI)

In this paper, pressurized oxy-fuel combustion power generation processes are modeled and analyzed based on a 350 MW subcritical reheat boiler associated with a condensing steam turbine. The performance results are obtained. Furthermore, the influences of slurry concentration and coal properties on power plant performance are investigated. An oxy-fuel configuration operating at ambient pressure is studied to compare the performance with pressurized oxy-fuel configuration. Thermodynamic analysis reveals the true potentials of the pressurized oxy-fuel process. Based on the system integration, an improved configuration is proposed in which plant efficiency of pressurized oxy-fuel process is increased by 1.36%.

Deng, S.M.; Hynes, R. [Hatch Energy, Oakville, ON (Canada)

2009-09-15T23:59:59.000Z

31

Effect of Operating Conditions on SO2 and NOx Emissions in Oxy-Fuel Mini-CFB Combustion Tests  

Science Journals Connector (OSTI)

Anthropogenic CO2 production is caused primarily by fossil fuel combustion. In consequence, it is increasingly necessary to find ways to reduce these emissions when fossil fuel is used. CO2 capture and storage (C...

L. Jia; Y. Tan; E. J. Anthony

2010-01-01T23:59:59.000Z

32

Modeling Energy Flow in an Integrated Pollutant Removal (IPR) System with CO2 Capture Integrated with Oxy-fuel Combustion  

Science Journals Connector (OSTI)

Oxy-coal combustion is one of the technical solutions for mitigating CO2 in thermal power plants. ... Currently, more than 85% of the energy that drives modern economies comes from fossil fuels, and this has stimulated research and development into more sustainable alternative energy sources. ... Other species, such as SO2, various nitrogen compounds, HCl, and Hg, are also present in quantities dependent upon the fossil fuel composition and the amount of air that leaks into the boiler. ...

Sivaram Harendra; Danylo Oryshcyhn; Stephen Gerdemann; Thomas Ochs; John Clark

2012-10-13T23:59:59.000Z

33

The next generation of oxy-fuel boiler systems  

SciTech Connect (OSTI)

Research in the area of oxy-fuel combustion which is being pioneered by Jupiter Oxygen Corporation combined with boiler research conducted by the USDOE/Albany Research Center has been applied to designing the next generation of oxy-fuel combustion systems. The new systems will enhance control of boiler systems during turn-down and improve response time while improving boiler efficiency. These next generation boiler systems produce a combustion product that has been shown to be well suited for integrated pollutant removal. These systems have the promise of reducing boiler foot-print and boiler construction costs. The modularity of the system opens the possibility of using this design for replacement of boilers for retrofit on existing systems.

Ochs, Thomas L.; Gross, Alex (Jupiter Oxygen Corp.); Patrick, Brian (Jupiter Oxygen Corp.); Oryshchyn, Danylo B.; Summers, Cathy A.; Turner, Paul C.

2005-01-01T23:59:59.000Z

34

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

35

Ranking of enabling technologies for oxy-fuel based carbon capture  

SciTech Connect (OSTI)

The USDOE National Energy Technology Laboratory (NETL) has begun a process to identify and rank enabling technologies that have significant impacts on pulverized coal oxy-fuel systems. Oxy-fuel combustion has been identified as a potential method for effectively capturing carbon in coal fired power plants. Presently there are a number of approaches for carbon capture via oxy-fuel combustion and it is important to order those approaches so that new research can concentrate on those technologies with high potentials to substantially lower the cost of reduced carbon electricity generation. NETL evaluates these technologies using computer models to determine the energy use of each technology and the potential impact of improvements in the technologies on energy production by a power plant. Near-term sub-critical boiler technologies are targeted for this analysis because: • most of the world continues to build single reheat sub-critical plants; • the overwhelming number of coal fired power plants requiring retrofit for CO2 capture are sub-critical plants. In addition, even in the realm of new construction, subcritical plants are common because they are well understood, easy to operate and maintain, fuel tolerant, and reliable. Following the initial investigation into sub-critical oxy-fuel technology, future investigations will move into the supercritical range.

Ochs, T.L.; Oryshchyn, D.L.; Ciferno, J.P.

2007-06-01T23:59:59.000Z

36

Dynamic Tests and Results in an Oxy-fuel Circulating Fluidized Bed Combustor with Warm Flue Gas Recycle  

Science Journals Connector (OSTI)

Dynamic Tests and Results in an Oxy-fuel Circulating Fluidized Bed Combustor with Warm Flue Gas Recycle ... Dynamic step change tests concerning the coal feed rate and coal type were conducted. ... In the dynamic tests, the oxygen concentration in the flue gas fluctuates in the form of a sinusoidal wave because of the fast volatile combustion and the delay in the char ignition. ...

Jian-xin Zhou; Zhuang Shao; Feng-qi Si; Zhi-gao Xu

2014-11-17T23:59:59.000Z

37

Techno-economic assessments of oxy-fuel technology for South African coal-fired power stations  

Science Journals Connector (OSTI)

Abstract Oxy-fuel technology is one of the potential solutions to reduce CO2 emissions from coal-fired power plants. Although vendors offer a “retrofit package,” to the best of our knowledge there has not been a study undertaken that looks at the technical and economic viability of oxy-fuel technology for CO2 capture for South African coal-fired power stations. This study presents a techno-economic analysis for six coal fired power stations in South Africa. Each of these power stations has a total capacity of about 3600 MW. The analysis was done using the oxy-fuel model developed by Carnegie Mellon University in the USA. The model was used to define the performance and costs of retrofitting the boilers. The results obtained showed that the CO2 emission rate was reduced by a factor of 10 for all the plants when retrofitted to oxy-fuel combustion. Between 27 and 29% of the energy generated was used to capture CO2. The energy loss was correlated to the coal properties. Sulphur content in the coal samples affects the energy used for flue gas cooling but did not affect the energy used for CO2 purification and compression. The study also showed there is a need for the flue gas to be treated for \\{NOx\\} and \\{SOx\\} control. The total capital costs and cost of electricity for the six plants were different, resulting with the cost of electricity varying from 101$/MWh to124$/MWh.

B.O. Oboirien; B.C. North; T. Kleyn

2014-01-01T23:59:59.000Z

38

Flame Stability of Methane and Syngas Oxy-fuel Steam Flames  

Science Journals Connector (OSTI)

The scaling relation [gF = c(SL2/?)] for different burner diameters was obtained for various diameter burners. ... The fuels used for these experiments were methane and syngas (CO–H2), which were burned with oxidants O2 and recirculated CO2 and H2O. Research-grade fuel and oxidant were delivered to the burners from pressurized tanks. ... Narrower flammable regimes and lower laminar burning velocity under oxy-fuel combustion conditions may lead to new stability challenges in operating oxy-coal burners. ...

B. K. Dam; N. D. Love; A. R. Choudhuri

2012-11-26T23:59:59.000Z

39

Development/Demonstration of an Advanced Oxy-Fuel Front-End System  

SciTech Connect (OSTI)

Owens Corning and other glass manufacturers have used oxy-fuel combustion technology successfully in furnaces to reduce emissions, increase throughput, reduce fuel consumption and, depending on the costs of oxygen and fuel, reduce energy costs. The front end of a fiberglass furnace is the refractory channel system that delivers glass from the melter to the forming process. After the melter, it is the second largest user of energy in a fiberglass plant. A consortium of glass companies and suppliers, led by Owens Corning, was formed to develop and demonstrate oxy/fuel combustion technology for the front end of a fiberglass melter, to demonstrate the viability of this energy saving technology to the U.S. glass industry, as a D.O.E. sponsored project. The project goals were to reduce natural gas consumption and CO2 green house gas emissions by 65 to 70% and create net cost savings after the purchase of oxygen to achieve a project payback of less than 2 years. Project results in Jackson, TN included achieving a 56% reduction in gas consumption and CO2 emissions. A subsequent installation in Guelph ON, not impacted by unrelated operational changes in Jackson, achieved a 64% reduction. Using the more accurate 64% reduction in the payback calculation yielded a 2.2 year payback in Jackson. The installation of the demonstration combustion system saves 77,000 DT/yr of natural gas or 77 trillion Btu/yr and eliminates 4500 tons/yr of CO2 emissions. This combustion system is one of several energy and green house gas reduction technologies being adopted by Owens Corning to achieve aggressive goals relating to the company’s global facility environmental footprint.

Mighton, Steven, J.

2007-08-06T23:59:59.000Z

40

Experimental and Modeling Study of Sulfur Capture by Limestone in Selected Conditions of Air-Fired and Oxy-fuel Circulating Fluidized-Bed Boilers  

Science Journals Connector (OSTI)

Liu et al.(5) noticed the influence of the system itself, noting that SO2 is enriched in the furnace of oxy-fuel combustion systems because the flue gas is recycled. ... This work has also been supported by the Academy of Finland under Grant 124368 and Foster Wheeler Energia Oy. ... In this study, the influence of CO2 on sulfur capture efficiency was studied during fluidized-bed desulfurization by experiments and modeling. ...

Sirpa Takkinen; Timo Hyppänen; Jaakko Saastamoinen; Toni Pikkarainen

2011-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Fireside Corrosion in Oxy-Fuel Combustion of Coal  

SciTech Connect (OSTI)

The goal is to develop technologies for pulverized coal boilers with >90% CO{sub 2} capture and sequestration and <35% increase in the cost of electricity. Air-fired power plant experience shows a corrosion loss max at 680-700 C. Low melting point alkali metal trisulfates, such as (K,Na){sub 3}Fe(SO{sub 4}){sub 3}, become thermally unstable above this temperature range. Some overall conclusions are: (1) CO{sub 2} + 30% H{sub 2}O more corrosive than Ar + 30% H{sub 2}O; (2) Excess O{sub 2} in H{sub 2}O can, in some cases, greatly increase oxidation; (3) Coal ash is generally innocuous without SO{sub 3}3 in gas phase; and (4) Long-term exposures are starting to establish differences between air-firing and oxy-firing conditions.

G. R. Holcomb; J. Tylczak; G. H. Meier; K. Jung; N. Mu; N. M. Yanar; F. S. Pettit

2011-10-09T23:59:59.000Z

42

Particulate emissions from combustion of biomass in conventional combustion (air) and oxy-combustion conditions.  

E-Print Network [OSTI]

??Oxy-fuel combustion is a viable technology for new and existing coal-fired power plants, as it facilitates carbon capture and thereby, can reduce carbon dioxide emissions.… (more)

Ruscio, Amanda

2013-01-01T23:59:59.000Z

43

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

44

Analysis of particle behavior in High-Velocity Oxy-Fuel thermal spraying process  

Science Journals Connector (OSTI)

This paper analyzes the behavior of coating particle as well as the gas flow both of inside and outside the High-Velocity Oxy-Fuel (HVOF) thermal spraying gun by using quasi-one-dimensional analysis and numerical...

Hiroshi Katanoda; Kazuyasu Matsuo

2003-08-01T23:59:59.000Z

45

Non-adiabatic flamelet modeling for combustion processes of oxy-natural gas flame  

Science Journals Connector (OSTI)

In order to realistically predict the combustion characteristics of the oxy-fuel flame, the present study employs the non-adiabatic flamelet approach. In this combustion model, the detailed equilibrium chemist...

Gunhong Kim; Yongmo Kim

2005-09-01T23:59:59.000Z

46

A Study on Heat Transfer Model in Sparse Zone of Oxy-Fuel Fired CFB  

Science Journals Connector (OSTI)

A model has been developed to calculate the coefficient heat transfer in sparse zone of oxy-fuel fired circulating fluidized bed boiler (CFBB). The model shows that the convective heat transfer coefficient is enhanced with increase in CO2 density, bed ...

Chunbo Wang; Weijun Hou; Wei Zhang; Guang Lu; Zhihong Huo; Jiao Zhang

2009-10-01T23:59:59.000Z

47

High-Velocity Oxy-Fuel (HVOF) Suspension Spraying of Mullite Coatings  

Science Journals Connector (OSTI)

Mullite coatings (3Al2O3 · 2SiO2) were deposited by suspension thermal spraying of micron-sized (D50...= 1.8 ?m) feedstock powders, using a high-velocity oxy-fuel gun (HVOF) operated on propylene (DJ-2700) and .....

J. Oberste Berghaus; B.R. Marple

2008-12-01T23:59:59.000Z

48

Development of a Novel Oxygen Supply Process and its Integration with an Oxy-Fuel Coal-Fired Boiler  

SciTech Connect (OSTI)

BOC, the world's second largest industrial gas company, has developed a novel high temperature sorption based technology referred to as CAR (Cyclic Autothermal Recovery) for oxygen production and supply to oxy-fuel boilers with flue gas recycle. This technology is based on sorption and storage of oxygen in a fixed bed containing mixed ionic and electronic conductor materials. The objective of the proposed work was to construct a CAR PDU that was capable of producing 10-scfm of oxygen, using steam or recycled flue gas as the sweep gas, and install it in the Combustion Test Facility. The unit was designed and fabricated at BOC/The Linde Group, Murray Hill, New Jersey. The unit was then shipped to WRI where the site had been prepared for the unit by installation of air, carbon dioxide, natural gas, nitrogen, computer, electrical and infrastructure systems. Initial experiments with the PDU consisted of flowing air into both sides of the absorption systems and using the air heaters to ramp up the bed temperatures. The two beds were tested individually to operational temperatures up to 900 C in air. The cycling process was tested where gases are flowed alternatively from the top then bottom of the beds. The PDU unit behaved properly with respect to flow, pressure and heat during tests. The PDU was advanced to the point where oxygen production testing could begin and integration to the combustion test facility could occur.

None

2006-12-31T23:59:59.000Z

49

Systems-level design of ion transport membrane oxy-combustion power plants  

E-Print Network [OSTI]

Oxy-fuel combustion, particularly using an integrated oxygen ion transport membrane (ITM), is a thermodynamically attractive concept that seeks to mitigate the penalties associated with CO 2 capture from power plants. ...

Mancini, Nicholas D. (Nicholas David)

2011-01-01T23:59:59.000Z

50

Task 2: Materials for Advanced Boiler and Oxy-combustion Systems  

SciTech Connect (OSTI)

Characterize advanced boiler (oxy-fuel combustion, biomass cofired) gas compositions and ash deposits Generate critical data on the effects of environmental conditions; develop a unified test method with a view to future standardisation

G. R. Holcomb and B. McGhee

2009-05-01T23:59:59.000Z

51

Computational fluid dynamics simulations of oxy-coal combustion for carbon capture at atmospheric and elevated pressures  

E-Print Network [OSTI]

Oxy-fuel combustion of solid fuels, often performed in a mixture of oxygen and wet or dry recycled carbon dioxide, has gained significant interest in the last two decades as one of the leading carbon capture technologies ...

Chen, Lei, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

52

Hybrid membrane/cryogenic separation of oxygen from air for use in the oxy-fuel process  

E-Print Network [OSTI]

and high temperature ion transport membranes. While polymeric membranes can produce oxygen enriched air of various concentrations, ion transport membranes can produce purities of close to 100%. Both membraHybrid membrane/cryogenic separation of oxygen from air for use in the oxy-fuel process Thomas

Struchtrup, Henning

53

Integration of Calcium and Chemical Looping Combustion using Composite CaO/CuO-Based Materials  

Science Journals Connector (OSTI)

In oxy-fuel combustion, fuel is combusted in pure oxygen rather than air. ... Shen, L.; Wu, J.; Xiao, J.Experiments on Chemical Looping Combustion of Coal with a NiO Based Oxygen Carrier Combust. ... Abanades, J. C.; Murillo, R.; Fernandez, J. R.; Grasa, G.; Martinez, I.New CO2 Capture Process for Hydrogen Production Combining Ca and Cu Chemical Loops Environ. ...

Vasilije Manovic; Edward J. Anthony

2011-10-24T23:59:59.000Z

54

Techno-economic analysis of sour gas oxy-fuel combustion power cycles for carbon capture and sequestration  

E-Print Network [OSTI]

The world's growing energy demand coupled with the problem of global warming have led us to investigate new energy sources that can be utilized in a way to reduce carbon dioxide emissions than traditional fossil fuel power ...

Chakroun, Nadim Walid

2014-01-01T23:59:59.000Z

55

Moderate or Intense Low-Oxygen Dilution Oxy-combustion Characteristics of Light Oil and Pulverized Coal in a Pilot-Scale Furnace  

Science Journals Connector (OSTI)

The primary and secondary oxidizer streams are preheated to 450 and 400 K with electrical heaters, respectively. ... on the heat transfer, the comparison of flameless oxyfuel and flameless air fuel combustion results of lab. ... processes that coal particles experience during combustion, the characteristics of oxy-fuel combustion are reviewed in the context of heat and mass transfer, fuel delivery and injection, coal particle heating and moisture evapn., devolatilization and ignition, char oxidn. ...

P. Li; F. Wang; Y. Tu; Z. Mei; J. Zhang; Y. Zheng; H. Liu; Z. Liu; J. Mi; C. Zheng

2014-01-06T23:59:59.000Z

56

Performance of high-velocity oxy-fuel-sprayed chromium carbide-nickel chromium coating in an actual boiler environment of a thermal power plant  

SciTech Connect (OSTI)

The present study aims to evaluate the performance of a high-velocity oxy-fuel (HVOF)-sprayed Cr{sub 3}C{sub 2}-NiCr (chromium carbide-nickel chromium) coating on a nickel-based super-alloy in an actual industrial environment of a coal-fired boiler, with the objective to protect the boiler super-heater and reheater tubes from hot corrosion. The tests were performed in the platen super heater zone of a coal-fired boiler for 1,000 h at 900 degrees C under cyclic conditions. The Cr{sub 3}C{sub 2}-NiCr coating imparted the necessary protection to the nickel-based super alloy in the given environment. The dense and flat splat structure of the coating, and the formation of oxides of chromium and nickel and their spinels, might have protected the substrate super alloy from the inward permeation of corrosive species.

Sidhu, T.S.; Prakash, S.; Agrawal, R.D. [Industrial Technology Institute, Roorkee (India)

2007-09-15T23:59:59.000Z

57

NETL: IEP – Post-Combustion CO2 Emissions Control - Characterization and  

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

Characterization and Prediction of Oxy-Combustion Impacts in Existing Coal-fired Boilers Characterization and Prediction of Oxy-Combustion Impacts in Existing Coal-fired Boilers Project No.: DE-NT0005288 Pilot-scale 100 kW oxy-fuel combustor Pilot-scale 100 kW oxy-fuel combustor Reaction Engineering International will conduct multi-scale experiments, coupled with mechanism development and computational fluid dynamics modeling, to evaluate the impacts of retrofitting existing coal-fired boilers for oxy-combustion. Test data will be obtained from oxy-combustion experiments at the 0.1-kilowatt (kW), 100-kW, and 1.2-megawatt scale. Related Papers and Publications: Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers [PDF-9MB] (Nov 2013) Final Project Review Meeting, Pittsburgh, PA, November 6, 2013. Characterization of Oxy-Combustion Impacts in Existing Coal-Fired Boilers [PDF-1.67MB] (July 2013)

58

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

59

Oxy-Combustion Environment Characterization: Fire- and Steam-Side Corrosion in Advanced Combustion  

SciTech Connect (OSTI)

Oxy-fuel combustion is burning a fuel in oxygen rather than air. The low nitrogen flue gas that results is relatively easy to capture CO{sub 2} from for reuse or sequestration. Corrosion issues associated with the environment change (replacement of much of the N{sub 2} with CO{sub 2} and higher sulfur levels) from air- to oxy-firing were examined. Alloys studied included model Fe-Cr alloys and commercial ferritic steels, austenitic steels, and nickel base superalloys. The corrosion behavior is described in terms of corrosion rates, scale morphologies, and scale/ash interactions for the different environmental conditions. Additionally, the progress towards laboratory oxidation tests in advanced ultra-supercritical steam is updated.

G. R. Holcomb; J. Tylczak; G. H. Meier; B. S. Lutz; N. M. Yanar; F. S. Pettit; J. Zhu; A. Wise; D. E. Laughlin; S. Sridhar

2012-09-25T23:59:59.000Z

60

Subsurface characterization of an oxidation-induced phase transformation and twinning in nickel-based superalloy exposed to oxy-combustion environments  

SciTech Connect (OSTI)

In the integration of oxy-fuel combustion to turbine power generation system, turbine alloys are exposed to high temperature and an atmosphere comprised of steam, CO{sub 2} and O{sub 2}. While surface and internal oxidation of the alloy takes place, the microstructure in the subsurface region also changes due to oxidation. In this study, bare metal coupons of Ni-base superalloys were exposed in oxy-fuel combustion environment for up to 1000 h and the oxidation-related microstructures were examined. Phase transformation occurred in the subsurface region in Ni-based superalloy and led to twinning. The transformation product phases were analyzed through thermodynamic equilibrium calculations and various electron microscopy techniques, including scanning electron microscopy (SEM), orientation imaging microscopy (OIM) and transmission electron microscopy (TEM). The mechanism by which the phase transformation and the formation of the microstructure occurred was also discussed. The possible effects of the product phases on the performance of the alloy in service were discussed.

Zhu, Jingxi; Holcomb, Gordon R.; Jablonski, Paul D.; Wise, Adam; Li, Jia; Laughlin, David E.; Sridhar, Seetharaman

2012-07-30T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Dilute Oxygen Combustion - Phase 3 Report  

SciTech Connect (OSTI)

Dilute Oxygen Combustion (DOC) burners have been successfully installed and operated in the reheat furnace at Auburn Steel Co., Inc., Auburn, NY, under Phase 3 of the Dilute Oxygen Combustion project. Two new preheat zones were created employing a total of eight 6.5 MMBtu/hr capacity burners. The preheat zones provide a 30 percent increase in maximum furnace production rate, from 75 tph to 100 tph. The fuel rate is essentially unchanged, with the fuel savings expected from oxy-fuel combustion being offset by higher flue gas temperatures. When allowance is made for the high nitrogen level and high gas phase temperature in the furnace, measured NOx emissions are in line with laboratory data on DOC burners developed in Phase 1 of the project. Burner performance has been good, and there have been no operating or maintenance problems. The DOC system continues to be used as part of Auburn Steel's standard reheat furnace practice. High gas phase temperature is a result of the high firing density needed to achieve high production rates, and little opportunity exists for improvement in that area. However, fuel and NOx performance can be improved by further conversion on furnace zones to DOC burners, which will lower furnace nitrogen levels. Major obstacles are cost and concern about increased formation of oxide scale on the steel. Oxide scale formation may be enhanced by exposure of the steel to higher concentrations of oxidizing gas components (primarily products of combustion) in the higher temperature zones of the furnace. Phase 4 of the DOC project will examine the rate of oxide scale formation in these higher temperature zones and develop countermeasures that will allow DOC burners to be used successfully in these furnace zones.

Riley, Michael F.

2000-05-31T23:59:59.000Z

62

Dilute Oxygen Combustion Phase 3 Final Report  

SciTech Connect (OSTI)

Dilute Oxygen Combustion (DOC) burners have been successfully installed and operated in the reheat furnace at Auburn Steel Co., Inc., Auburn, NY, under Phase 3 of the Dilute Oxygen Combustion project. Two new preheat zones were created employing a total of eight 6.5 MMBtu/hr capacity burners. The preheat zones provide a 30 percent increase in maximum furnace production rate, from 75 tph to 100 tph. The fuel rate is essentially unchanged, with the fuel savings expected from oxy-fuel combustion being offset by higher flue gas temperatures. When allowance is made for the high nitrogen level and high gas phase temperature in the furnace, measured NOx emissions are in line with laboratory data on DOC burners developed in Phase 1 of the project. Burner performance has been good and there have been no operating or maintenance problems. The DOC system continues to be used as part of Auburn Steel?s standard reheat furnace practice. High gas phase temperature is a result of the high firing density needed to achieve high production rates, and little opportunity exists for improvement in that area. However, fuel and NOx performance can be improved by further conversion of furnace zones to DOC burners, which will lower furnace nitrogen levels. Major obstacles are cost and concern about increased formation of oxide scale on the steel. Oxide scale formation may be enhanced by exposure of the steel to higher concentrations of oxidizing gas components (primarily products of combustion) in the higher temperature zones of the furnace. Phase 4 of the DOC project will examine the rate of oxide scale formation in these higher temperature zones and develop countermeasures that will allow DOC burners to be used successfully in these furnace zones.

Riley, M.F.; Ryan, H.M.

2000-05-31T23:59:59.000Z

63

System issues and tradeoffs associated with syngas production and combustion  

SciTech Connect (OSTI)

The purpose of this article is to provide an overview of the basic technology of coal gasification for the production of syngas and the utilization of that syngas in power generation. The common gasifier types, fixed/moving bed, fluidized bed, entrained flow, and transport, are described, and accompanying typical product syngas compositions are shown for different coal ranks. Substantial variation in product gas composition is observed with changes in gasifier and coal feed type. Fuel contaminants such as sulfur, nitrogen, ash, as well as heavy metals such as mercury, arsenic, and selenium, can be removed to protect the environment and downstream processes. A variety of methods for syngas utilization for power production are discussed, including both present (gas turbine and internal combustion engines) and future technologies, including oxy-fuel, chemical looping, fuel cells, and hybrids. Goals to improve system efficiencies, further reduce NOx emissions, and provide options for CO2 sequestration require advancements in many aspects of IGCC plants, including the combustion system. Areas for improvements in combustion technology that could minimize these tradeoffs between cost, complexity, and performance are discussed.

Casleton, K.H.; Richards, G.A.; Breault, R.W.

2008-06-01T23:59:59.000Z

64

System Issues and Tradeoffs Associated with Syngas Production and Combustion  

SciTech Connect (OSTI)

The purpose of this article is to provide an overview of the basic technology of coal gasification for the production of syngas and the utilization of that syngas in power generation. The common gasifier types, fixed=moving bed, fluidized bed, entrained flow, and transport, are described, and accompanying typical product syngas compositions are shown for different coal ranks. Substantial variation in product gas composition is observed with changes in gasifier and coal feed type. Fuel contaminants such as sulfur, nitrogen, ash, as well as heavy metals such as mercury, arsenic, and selenium, can be removed to protect the environment and downstream processes. A variety of methods for syngas utilization for power production are discussed, including both present (gas turbine and internal combustion engines) and future technologies, including oxy-fuel, chemical looping, fuel cells, and hybrids. Goals to improve system efficiencies, further reduce NOx emissions, and provide options for CO2 sequestration require advancements in many aspects of IGCC plants, including the combustion system. Areas for improvements in combustion technology that could minimize these tradeoffs between cost, complexity, and performance are discussed.

Kent H. Casleton; Ronald W. Breault; George A. Richards

2008-06-01T23:59:59.000Z

65

Oxy-coal Combustion Studies  

SciTech Connect (OSTI)

The objective of this project is to move toward the development of a predictive capability with quantified uncertainty bounds for pilot-scale, single-burner, oxy-coal operation. This validation research brings together multi-scale experimental measurements and computer simulations. The combination of simulation development and validation experiments is designed to lead to predictive tools for the performance of existing air fired pulverized coal boilers that have been retrofitted to various oxy-firing configurations. In addition, this report also describes novel research results related to oxy-combustion in circulating fluidized beds. For pulverized coal combustion configurations, particular attention is focused on the effect of oxy-firing on ignition and coal-flame stability, and on the subsequent partitioning mechanisms of the ash aerosol. To these ends, the project has focused on the following: â?¢ The development of reliable Large Eddy Simulations (LES) of oxy-coal flames using the Direct Quadrature Method of Moments (DQMOM) (Subtask 3.1). The simulations were validated for both non-reacting particle-laden jets and oxy-coal flames. â?¢ The modifications of an existing oxy-coal combustor to allow operation with high levels of input oxygen to enable in-situ laser diagnostic measurements as well as the development of strategies for directed oxygen injection (Subtask 3.2). Flame stability was quantified for various burner configurations. One configuration that was explored was to inject all the oxygen as a pure gas within an annular oxygen lance, with burner aerodynamics controlling the subsequent mixing. â?¢ The development of Particle Image Velocimetry (PIV) for identification of velocity fields in turbulent oxy-coal flames in order to provide high-fidelity data for the validation of oxy-coal simulation models (Subtask 3.3). Initial efforts utilized a laboratory diffusion flame, first using gas-fuel and later a pulverized-coal flame to ensure the methodology was properly implemented and that all necessary data and image-processing techniques were fully developed. Success at this stage of development led to application of the diagnostics in a large-scale oxy-fuel combustor (OFC). â?¢ The impact of oxy-coal-fired vs. air-fired environments on SO{sub x} (SO{sub 2}, SO{sub 3}) emissions during coal combustion in a pilot-scale circulating fluidized-bed (CFB) (Subtask 3.4). Profiles of species concentration and temperature were obtained for both conditions, and profiles of temperature over a wide range of O{sub 2} concentration were studied for oxy-firing conditions. The effect of limestone addition on SO{sub 2} and SO{sub 3} emissions were also examined for both air- and oxy- firing conditions. â?¢ The investigation of O{sub 2}/CO{sub 2} and O{sub 2}/N{sub 2} environments on SO{sub 2 emissions during coal combustion in a bench-scale single-particle fluidized-bed reactor (Subtask 3.5). Moreover, the sulfation mechanisms of limestone in O{sub 2}/CO{sub 2} and O{sub 2}/N{sub 2} environments were studied, and a generalized gassolid and diffusion-reaction single-particle model was developed to study the effect of major operating variables. â?¢ The investigation of the effect of oxy-coal combustion on ash formation, particle size distributions (PSD), and size-segregated elemental composition in a drop-tube furnace and the 100 kW OFC (Subtask 3.6). In particular, the effect of coal type and flue gas recycle (FGR, OFC only) was investigated.

J. Wendt; E. Eddings; J. Lighty; T. Ring; P. Smith; J. Thornock; Y. Jia, W. Morris; J. Pedel; D. Rezeai; L. Wang; J. Zhang; K. Kelly

2012-01-01T23:59:59.000Z

66

Ash aerosol formation from oxy-coal combustion and its relation to ash deposit chemistry  

Science Journals Connector (OSTI)

Abstract Ash aerosol and ash deposit formation during oxy-coal combustion were explored through experiments in a self-sustained 100 kW rated down-fired oxy-fuel combustor. Inlet oxidant conditions consisted of 50% inlet oxygen with CO2 (hereafter denoted as OXY50 conditions). A Berner low pressure impactor (BLPI), a scanning mobility particle sizer (SMPS), and an aerodynamic particle sizer (APS) were used to obtain size segregated ash aerosol samples and to determine the particle size distributions (PSD). A novel surface temperature controlled ash deposition probe system that allowed inside and outside deposits to be separated was used to collect the ash deposits. The ash aerosol \\{PSDs\\} given by the BLPI and those produced by SMPS/APS were consistent with each other. Data suggested that oxy-coal combustion under these conditions did not change the formation mechanisms controlling the bulk ash aerosol composition, but it did increase the formation of ultra-fine particles initially formed through metal vaporization, due to increased vaporization of silicon at the higher combustion temperature. The smaller particles contained within the deposits had higher Si and lower Na and S concentrations under OXY50 conditions than for air combustion. Moreover, the ash aerosol composition for particle sizes less than 2.4 ?m was related to the composition of the inside deposits. A higher Na in the ash aerosol resulted in higher Na in inside deposits with comparable absolute Na concentrations in both those aerosol particles and those inside deposits particles. The contribution of S and Si to the inside deposits showed that S in the vaporization modes together with Si in the ultrafine vaporization mode, contributed significantly to the composition of the inside deposits. These results provided direct evidence that prediction of the chemistry of the initial deposit layer (but not of the bulk deposits) required knowledge of the size segregated chemistry of the ash aerosol.

Zhonghua Zhan; Andrew Fry; Yanwei Zhang; Jost O.L. Wendt

2014-01-01T23:59:59.000Z

67

NETL Patents | netl.doe.gov  

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

temperatures associated with coal gasification, solid oxide fuel cells, gas turbines, boilers, and oxy-fuel combustion systems. Not only can these advanced sensors withstand...

68

NETL LabNotes | netl.doe.gov  

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

Waste Slag to Create Energy and Cut Emissions JULY 2014 Corrosion Testing using Oxy-Fuel Combustion for Ultra-Supercritical Steam Boilers NETL's Corrosion Erosion Facility Tests...

69

Advanced Combustion  

SciTech Connect (OSTI)

Topics covered in this presentation include: the continued importance of coal; related materials challenges; combining oxy-combustion & A-USC steam; and casting large superalloy turbine components.

Holcomb, Gordon R. [NETL

2013-03-05T23:59:59.000Z

70

Combustion Noise  

E-Print Network [OSTI]

stabilize or destabilize the modes of the system, depending on the configuration of the combustor and the form of the coupling [26, 30]. In contrast to combustion instability, in broad-band combustion noise the unsteadiness in the rate of combustion... from th s in a mod on tempera , entropic a de of indir t frequenci r, open que sical theory assical expe s [14] who it by a spa d a transie le gases. A e bubble si idered as a flame was ent was o ng and dif depended udy it wa ion, ? ?,p r t? : (a...

Dowling, Ann P.; Mahmoudi, Yasser

2014-01-01T23:59:59.000Z

71

Combustion Engine  

Broader source: Energy.gov [DOE]

Pictured here is an animation showing the basic mechanics of how an internal combustion engine works. With support from the Energy Department, General Motors researchers developed a new technology ...

72

Dilute Oxygen Combustion Phase I Final Report  

SciTech Connect (OSTI)

A novel burner, in which fuel (natural gas) and oxidant (oxygen or air) are separately injected into a furnace, shows promise for achieving very low nitrogen oxide(s) (NOx) emissions for commercial furnace applications. The dilute oxygen combustion (DOC) burner achieves very low NOx through in-furnace dilution of the oxidant stream prior to combustion, resulting in low flame temperatures, thus inhibiting thermal NOx production. The results of a fundamental and applied research effort on the development of the DOC burner are presented. In addition, the results of a market survey detailing the potential commercial impact of the DOC system are disclosed. The fundamental aspects of the burner development project involved examining the flame characteristics of a natural gas turbulent jet in a high-temperature (~1366 K) oxidant (7-27% O2 vol. wet). Specifically, the mass entrainment rate, the flame lift-off height, the velocity field and major species field of the jet were evaluated as a function of surrounding-gas temperature and composition. The measured entrainment rate of the fuel jet decreased with increasing oxygen content in the surrounding high-temperature oxidant, and was well represented by the d+ scaling correlation found in the literature. The measured flame lift-off height decreased with increasing oxygen content and increasing temperature of the surrounding gas. An increase in surrounding-gas oxygen content and/or temperature inhibited the velocity decay within the jet periphery as a function of axial distance as compared to isothermal turbulent jets. However, the velocity measurements were only broadly represented by the d+ scaling correlation. Several DOC burner configurations were tested in a laboratory-scale furnace at a nominal firing rate of 185 kW (~0.63 MMBtu/h). The flue gas composition was recorded as a function of furnace nitrogen content, furnace temperature, burner geometric arrangement, firing rate, and fuel injection velocity. NOx emissions increased with increasing furnace nitrogen content and furnace temperature, but remained relatively insensitive to variations in fuel injection velocity and firing rate. NOx emissions below 5-10-3 g/MJ (10 ppm-air equivalent at 3% O2 dry) were obtained for furnace temperatures below 1533 K (2300°F) and furnace nitrogen levels between 1 and 40%. CO emissions were typically low (<35 ppm). Detailed in-furnace species measurements revealed the importance of the interior furnace circulation patterns, as influenced by fuel and oxidant injection schemes, on pollutant emissions. The combustion stability traits of several DOC burner arrangements were ascertained through furnace pressure measurements, wit6h increased stability occurring as furnace temperature increased and as the separation distance between fuel and oxidant inputs decreased. Based on current market conditions, oxy-fuel conversion of batch steel reheat furnaces with a DOC burner is justified on the basis of lower utility costs alone. However, conversion of continuous steel reheat furnaces, which are responsible for most steel production, required additional economic incentives, such as further fuel savings, increased furnace productivity, or emission credits.

Ryan, H.M.; Riley, M.F.; Kobayashi, H.

1997-10-31T23:59:59.000Z

73

Dilute Oxygen Combustion Phase 2 Final Report  

SciTech Connect (OSTI)

A novel burner, in which fuel (natural gas) and oxidant (oxygen or air) are separately injected into a furnace, shows promise for achieving very low nitrogen oxide(s) (NOx) emissions for commercial furnace applications. The dilute oxygen combustion (DOC) burner achieves very low NOx through in-furnace dilution of the oxidant stream prior to combustion, resulting in low flame temperatures, thus inhibiting thermal NOx production. The results of a fundamental and applied research effort on the development of the DOC burner are presented. In addition, the results of a market survey detailing the potential commercial impact of the DOC system are disclosed. The fundamental aspects of the burner development project involved examining the flame characteristics of a natural gas turbulent jet in a high-temperature (~1366 K) oxidant (7-27% O2 vol. wet). Specifically, the mass entrainment rate, the flame lift-off height, the velocity field and major species field of the jet were evaluated as a function of surrounding-gas temperature and composition. The measured entrainment rate of the fuel jet decreased with increasing oxygen content in the surrounding high-temperature oxidant, and was well represented by the d+ scaling correlation found in the literature. The measured flame lift-off height decreased with increasing oxygen content and increasing temperature of the surrounding gas. An increase in surrounding-gas oxygen content and/or temperature inhibited the velocity decay within the jet periphery as a function of axial distance as compared to isothermal turbulent jets. However, the velocity measurements were only broadly represented by the d+ scaling correlation. Several DOC burner configurations were tested in a laboratory-scale furnace at a nominal firing rate of 185 kW (~0.63 MMBtu/h). The flue gas composition was recorded as a function of furnace nitrogen content, furnace temperature, burner geometric arrangement, firing rate, and fuel injection velocity. NOx emissions increased with increasing furnace nitrogen content and furnace temperature, but remained relatively insensitive to variations in fuel injection velocity and firing rate. NOx emissions below 5-10-3 g/MJ (10 ppm-air equivalent at 3% O2 dry) were obtained for furnace temperatures below 1533 K (2300?F) and furnace nitrogen levels between 1 and 40%. CO emissions were typically low (<35 ppm). Detailed in-furnace species measurements revealed the importance of the interior furnace circulation patterns, as influenced by fuel and oxidant injection schemes, on pollutant emissions. The combustion stability traits of several DOC burner arrangements were ascertained through furnace pressure measurements, wit6h increased stability occurring as furnace temperature increased and as the separation distance between fuel and oxidant inputs decreased. Based on current market conditions, oxy-fuel conversion of batch steel reheat furnaces with a DOC burner is justified on the basis of lower utility costs alone. However, conversion of continuous steel reheat furnaces, which are responsible for most steel production, required additional economic incentives, such as further fuel savings, increased furnace productivity, or emission credits.

Ryan, H.M.; Riley, M.F.; Kobayashi, H.

2005-09-30T23:59:59.000Z

74

Dilute oxygen combustion. Phase I report  

SciTech Connect (OSTI)

A novel burner, in which fuel (natural gas) and oxidant (oxygen or air) are separately injected into a furnace, shows promise for achieving very low nitrogen oxide(s) (NO{sub x}) emissions for commercial furnace applications. The dilute oxygen combustion (DOC) burner achieves very low NO{sub x} through in-furnace dilution of the oxidant stream prior to combustion, resulting in low flame temperatures, thus inhibiting thermal NO{sub x} production. The results of a fundamental and applied research effort on the development of the DOC burner are presented. In addition, the results of a market survey detailing the potential commercial impact of the DOC system are disclosed. The fundamental aspects of the burner development project involved examining the flame characteristics of a natural gas turbulent jet in a high-temperature ({approximately}1366 K) oxidant (7-27% O{sub 2} vol. wet). Specifically, the mass entrainment rate, the flame lift-off height, the velocity field and major species field of the jet were evaluated as a function of surrounding-gas temperature and composition. The measured entrainment rate of the fuel jet decreased with increasing oxygen content in the surrounding high-temperature oxidant, and was well represented by the d{sup +} scaling correlation found in the literature. The measured flame lift-off height decreased with increasing oxygen content and increasing temperature of the surrounding gas. An increase in surrounding-gas oxygen content and/or temperature inhibited the velocity decay within the jet periphery as a function of axial distance as compared to isothermal turbulent jets. However, the velocity measurements were only broadly represented by the d{sup +} scaling correlation. Several DOC burner configurations were tested in a laboratory-scale furnace at a nominal firing rate of 185 kW ({approximately}0.63 MMBtu/h). The flue gas composition was recorded as a function of furnace nitrogen content, furnace temperature, burner geometric arrangement, firing rate, and fuel injection velocity. NO{sub x} emissions increased with increasing furnace nitrogen content and furnace temperature, but remained relatively insensitive to variations in fuel injection velocity and firing rate. NO{sub x} emissions below 5{times}10{sup -3} g/MJ (10 ppm-air equivalent at 3% O{sub 2} dry) were obtained for furnace temperatures below 1533 K (2300{degree}F) and furnace nitrogen levels between 1 and 40%. CO emissions were typically low (<35 ppm). Detailed in- furnace species measurements revealed the importance of the interior furnace circulation patterns, as influenced by fuel and oxidant injection schemes, on pollutant emissions. The combustion stability traits of several DOC burner arrangements were ascertained through furnace pressure measurements, with increased stability occurring as furnace temperature increased and as the separation distance between fuel and oxidant inputs decreased. Based on current market conditions, oxy-fuel conversion of batch steel reheat furnaces with a DOC burner is justified on the basis of utility costs alone. However, conversion of continuous steel reheat furnaces, which are responsible for most steel production, requires additional economic incentives, such as further fuel savings, increased furnace productivity, or emission credits.

NONE

1997-10-01T23:59:59.000Z

75

Pulse combustion  

Science Journals Connector (OSTI)

Pulse combustion has been gaining increased interest because of its potential for higher combustion efficiency greater combustion intensity and lower pollutant emissions. Unsteady combustion causes increased mass momentum and heat transfer. As a result reactants mix faster heat release is accelerated and heat transfer is enhanced in unsteady reacting flows. Many of these phenomena were discovered long ago by engineers looking for the cause of often detrimental combustion instabilities. Much more recently some of these enhanced transfer properties have been used to design efficient and compact pulse combustors. Although to date successful commercialization on a large scale has been limited to home heating units (e.g. the Lenox Pulse Furnace) highly efficient pulse spray dryers (Bepex Unison Dryer) pulse calciners and pulse waste incinerators have been designed. Pulsations have also been applied to carbon black fluidized bed gasifiers. Not all these designs will become economically viable. However the development of tunable pulse combustors that can be acoustically matched to the changing resonance frequency of these pulse processes have made many of them more promising. Recent findings that pulsation can enhance burning even in turbulent flows lend further encouragement to the developers of novel pulse combustion devices.

Jechiel I. Jagoda

2000-01-01T23:59:59.000Z

76

COMBUSTION RESEARCH - FY-1979  

E-Print Network [OSTI]

deposition due to the heat of combustion. The problem wedimensionless heat of combustion, QpYoxoolhw t transferredfraction of specie i heat of combustion per gram of fuel

,

2012-01-01T23:59:59.000Z

77

Fireside Corrosion USC Steering  

SciTech Connect (OSTI)

Oxy-Fuel Fireside Research goals are: (1) Determine the effect of oxy-fuel combustion on fireside corrosion - (a) Flue gas recycle choice, Staged combustion ramifications, (c) JCOAL Collaboration; and (2) Develop methods to use chromia solubility in ash as an 'ash corrosivity' measurement - (a) Synthetic ashes at first, then boiler and burner rig ashes, (b) Applicable to SH/RH conditions.

G. R. Holcomb; J. Tylczak

2011-09-07T23:59:59.000Z

78

Advanced Combustion  

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

Systems Systems Advanced Combustion Background Conventional coal-fired power plants utilize steam turbines to generate electricity, which operate at efficiencies of 35-37 percent. Operation at higher temperatures and pressures can lead to higher efficiencies, resulting in reduced fuel consumption and lower greenhouse gas emissions. Higher efficiency also reduces CO2 production for the same amount of energy produced, thereby facilitating a reduction in greenhouse gas emissions. When combined, oxy-combustion comes with an efficiency hit, so it will actually increase the amount of CO2 to be captured. But without so much N2 in the flue gas, it will be easier and perhaps more efficient to capture, utilize and sequester. NETL's Advanced Combustion Project and members of the NETL-Regional University

79

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.

80

Turbulent combustion  

SciTech Connect (OSTI)

Turbulent combustion is the dominant process in heat and power generating systems. Its most significant aspect is to enhance the burning rate and volumetric power density. Turbulent mixing, however, also influences the chemical rates and has a direct effect on the formation of pollutants, flame ignition and extinction. Therefore, research and development of modern combustion systems for power generation, waste incineration and material synthesis must rely on a fundamental understanding of the physical effect of turbulence on combustion to develop theoretical models that can be used as design tools. The overall objective of this program is to investigate, primarily experimentally, the interaction and coupling between turbulence and combustion. These processes are complex and are characterized by scalar and velocity fluctuations with time and length scales spanning several orders of magnitude. They are also influenced by the so-called {open_quotes}field{close_quotes} effects associated with the characteristics of the flow and burner geometries. The authors` approach is to gain a fundamental understanding by investigating idealized laboratory flames. Laboratory flames are amenable to detailed interrogation by laser diagnostics and their flow geometries are chosen to simplify numerical modeling and simulations and to facilitate comparison between experiments and theory.

Talbot, L.; Cheng, R.K. [Lawrence Berkeley Laboratory, CA (United States)

1993-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Combustion & Health  

E-Print Network [OSTI]

FFCOMBUSTION & HEALTH Winifred J. Hamilton, PhD, SM Clear Air Through Energy Efficiency (CATEE) Galveston, TX October 9?11, 2012 FFCOMBUSTION & HEALTH FFCOMBUSTION: THE THREAT ? Biggest threat to world ecosystems (and to human health...) ? Combustion of fossil fuels for ? Electricity ? Industrial processes ? Vehicle propulsion ? Cooking and heat ? Other ? Munitions ? Fireworks ? Light ? Cigarettes, hookahs? FFCOMBUSTION & HEALTH FFCOMBUSTION: THE THREAT ? SCALE (think health...

Hamilton, W.

2012-01-01T23:59:59.000Z

82

Stretch Efficiency for Combustion Engines: Exploiting New Combustion...  

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

Stretch Efficiency for Combustion Engines: Exploiting New Combustion Regimes Stretch Efficiency for Combustion Engines: Exploiting New Combustion Regimes 2012 DOE Hydrogen and Fuel...

83

Light Duty Combustion Research: Advanced Light-Duty Combustion...  

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

Light Duty Combustion Research: Advanced Light-Duty Combustion Experiments Light Duty Combustion Research: Advanced Light-Duty Combustion Experiments 2009 DOE Hydrogen Program and...

84

Combustion Control  

E-Print Network [OSTI]

using a liquid fuel. The air and fuel valve designs are vastly different, with different flow characteristics. These factors make the initial adjustment of the system difficult, and proper maintenance of ratio accuracy unlikely. Linked valves... casing of the fuel control regulator with the combustion air piping. The upstream pressure on the burner air orifice is applied to the main diaphragm of the pressure balanced regulator. Assuming sufficient gas pressure at the regulator inlet...

Riccardi, R. C.

1984-01-01T23:59:59.000Z

85

Microsoft PowerPoint - DE-FE0002402_UTEP_Choudhuri.pptx  

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

Project Project DE-FE0002402 Project DE FE0002402 Title: Investigation on Flame Characteristics and Burner Operability Issues of Oxy-Fuel Combustion p y y University of Texas El Paso y Presenter: Dr. Ahsan Choudhuri, Department of Mechanical Engineering February 24-26, 2011 Project Participants Project Participants * PI: Ahsan Choudhuri PI: Ahsan Choudhuri h f * Research Professor: Norman Love * Students Supported: - Bidhan Dam (Doctoral) d a a ( oc o a ) - MD Rafiql Islam (Master's) Introduction * Background: Investigate oxy-fuel flame g g y characteristics and assess their impact on operability of oxy-fuel combustion systems. * Anticipated benefits: Data are essential for designing and developing oxy-fuel combustion designing and developing oxy fuel combustion

86

Albany, OR * Anchorage, AK * Morgantown...  

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

pollutants and CO 2 . Oxy-fuel combustion of hydrocarbon fuel (coal, natural-gas, biomass) generates denitrified combustion gas comprising dominantly CO 2 and H 2 O. The...

87

Albany, OR * Anchorage, AK * Morgantown, WV * Pittsburgh, PA...  

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

pollutants and CO 2 . Oxy-fuel combustion of hydrocarbon fuel (coal, natural-gas, biomass) generates denitrified combustion gas comprising dominantly CO 2 and H 2 O. The...

88

Combustion chemistry  

SciTech Connect (OSTI)

This research is concerned with the development and use of sensitivity analysis tools to probe the response of dependent variables to model input variables. Sensitivity analysis is important at all levels of combustion modeling. This group`s research continues to be focused on elucidating the interrelationship between features in the underlying potential energy surface (obtained from ab initio quantum chemistry calculations) and their responses in the quantum dynamics, e.g., reactive transition probabilities, cross sections, and thermal rate coefficients. The goals of this research are: (i) to provide feedback information to quantum chemists in their potential surface refinement efforts, and (ii) to gain a better understanding of how various regions in the potential influence the dynamics. These investigations are carried out with the methodology of quantum functional sensitivity analysis (QFSA).

Brown, N.J. [Lawrence Berkeley Laboratory, CA (United States)

1993-12-01T23:59:59.000Z

89

Stretch Efficiency for Combustion Engines: Exploiting New Combustion...  

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

D.C. ace15daw.pdf More Documents & Publications Stretch Efficiency for Combustion Engines: Exploiting New Combustion Regimes Stretch Efficiency for Combustion Engines:...

90

Categorical Exclusion Determinations: American Recovery and Reinvestment  

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

7, 2009 7, 2009 CX-000460: Categorical Exclusion Determination Thermal Integration of Carbon Dioxide Compression Processes with Coal-Fired Power Plants Equipped with Carbon Capture CX(s) Applied: A9 Date: 12/07/2009 Location(s): Bethlehem, Pennsylvania Office(s): Fossil Energy, National Energy Technology Laboratory December 7, 2009 CX-000459: Categorical Exclusion Determination Molecular Simulation of Dissolved Inorganic Carbons for Underground Brine Carbon Dioxide Sequestration CX(s) Applied: A9, B3.6 Date: 12/07/2009 Location(s): Pasadena, California Office(s): Fossil Energy, National Energy Technology Laboratory December 7, 2009 CX-000458: Categorical Exclusion Determination Investigation on Flame Characteristics and Burner Operability Issues of Oxy-Fuel Combustion

91

Advanced Combustion | Argonne National Laboratory  

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

Combustion Advanced Combustion Combustion engines drive a large percentage of our nation's transportation vehicles and power generation and manufacturing facilities. Today's...

92

CO2-avskiljning med syrgasfrbrnning -nya tekniska mjligheter  

E-Print Network [OSTI]

of biomass and coal in oxy-fuel combustion · Is it possible to control or mitigate high-temperature corrosion;Biomass in oxy-fuel combustion ­ sulfation of alkali 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 50 100 150 200 2502 Cl2 Air K2 Cl2 Oxy1 K2 Cl2 Oxy2 KOH Air KOH Oxy1 KOH Oxy2 #12;Biomass in oxy-fuel combustion

Lemurell, Stefan

93

Chemical Looping Combustion  

Science Journals Connector (OSTI)

Chemical looping combustion (CLC) and looping cycles in general represent an important new ... technologies, which can be deployed for direct combustion as well as be used in gasification...2...stream suitable fo...

Edward John (Ben) Anthony

2012-01-01T23:59:59.000Z

94

Chemistry of Combustion Processes  

Science Journals Connector (OSTI)

The quantitative description and understanding of combustion processes needs extreme computational efforts and has at ... treatment can give a lot of insight into combustion processes, as demonstrated in the foll...

J. Warnatz

2000-01-01T23:59:59.000Z

95

Overview of Biomass Combustion  

Science Journals Connector (OSTI)

The main combustion systems for biomass fuels are presented and the respective requirements ... etc.) in industrial boilers or for co-combustion in power plants. For fuels with high ... moving grate firings are u...

T. Nussbaumer; J. E. Hustad

1997-01-01T23:59:59.000Z

96

QGESS: CO2 Impurity Design Parameters  

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

10. Shah, Minish. Capturing CO2 from Oxy-Fuel Combustion Flue Gas. Cottbus, Germany : Praxair Inc., 2005. 11. Spitznogle, Gary O. CO2 Impurity Specification at AEP Mountaineer....

97

Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers  

SciTech Connect (OSTI)

This report summarizes Year 1 results of a research program designed to use multi-scale experimental studies and fundamental theoretical models to characterize and predict the impacts of retrofit of existing coal-fired utility boilers for oxy-combustion. Through the course of Year 1 activities, great progress was made toward understanding the issues associated with oxy-combustion retrofit of coal-fired boilers. All four Year 1 milestones and objectives have been, or will be, completed on schedule and within budget. Progress in the four milestone areas may be summarized as follows: • University of Utah has performed size segregated ash composition measurements in the Oxy-Fuel Combustor (OFC). These experiments indicate that oxy-combustion retrofit may impact ash aerosol mineral matter composition. Both flame temperature and flue gas composition have been observed to influence the concentration of calcium, magnesium and iron in the fine particulate. This could in turn impact boiler fouling and slagging. • Sandia National Labs has shown that char oxidation rate is dependent on particle size (for sizes between 60 and 100 microns) by performing fundamental simulations of reacting char particles. These predictions will be verified by making time-resolved optical measurements of char particle temperature, velocity and size in bench-scale experiments before the end of Year 1. • REI and Siemens have completed the design of an oxy-research burner that will be mounted on University of Utah’s pilot-scale furnace, the L1500. This burner will accommodate a wide range of O2, FGR and mixing strategies under conditions relevant for utility boiler operation. Through CFD modeling of the different burner designs, it was determined that the key factor influencing flame stabilization location is particle heat-up rate. The new oxy-research burner and associated equipment is scheduled for delivery before the end of Year 1. • REI has completed a literature survey of slagging and fouling mechanisms in coal-fired power plants to understand key issues influencing these deposition regimes and infer their behavior under oxy-fired conditions. Based on the results of this survey, an algorithm for integrating slagging predictions into CFD models was outlined. This method accounts for ash formation, particle impaction and sticking, deposit growth and physical properties and impact of the deposit on system flow and heat transfer. A model for fouling in the back pass has also been identified which includes vaporization of sodium, deposition of sodium sulfate on fly ash particles and tube surfaces, and deposit growth rate on tubes. In Year 1, REI has also performed a review of the literature describing corrosion in order to understand the behavior of oxidation, sulfidation, chloridation, and carburization mechanisms in air-fired and oxy-combustion systems. REI and Vattenfall have met and exchanged information concerning oxy-coal combustion mechanisms for CFD simulations currently used by Vattenfall. In preparation for Year 2 of this program, two coals (North Antelope PRB, Western bituminous) have been ordered, pulverized and delivered to the University of Utah and Sandia National Labs. Materials for the corrosion experiments have been identified, suppliers located, and a schedule for equipment fabrication and shakedown has been established. Finally, a flue gas recycle system has been designed and is being constructed for the OFC.

Bradley Adams; Andrew Fry; Constance Senior; Hong Shim; Huafeng Wang; Jost Wendt; Christopher Shaddix

2009-06-30T23:59:59.000Z

98

Thermodynamic and economic analysis of the different variants of a coal-fired, 460 MW power plant using oxy-combustion technology  

Science Journals Connector (OSTI)

Abstract In the face of existing international provisions limiting the emissions of greenhouse gases, primarily carbon dioxide, it is necessary to introduce solutions that will allow the production of electricity from coal with high efficiency and low emissions. Oxy-combustion systems integrated with carbon capture and storage (CCS) installations may prove to be such a solution. This paper presents the main results from a thermodynamic analysis of a supercritical unit operating in oxy-combustion technology, fueled with pulverized coal with a power output of 460 MW. The parameters of the live steam in the analyzed system are 600 °C/30 MPa. To perform the numerical analyses, models of the individual components were built, including an oxygen production installation (ASU), a boiler, a steam cycle and a flue gas conditioning system (CPU). The models were built in the commercial programs GateCycle and Aspen and then integrated into the Excel environment. In this paper, different structures for an integrated oxy-type system were analyzed and compared. The auxiliary power rates were determined for individual technological installations of the oxy-combustion power plant. The highest value of this indicator, in the range between 15.65% and 19.10% was calculated for the cryogenic ASU. The total value of this index for the whole installation reaches as high as 35% for the base case. The use of waste heat from the interstage cooling of compressors in the air separation installation and flue gas conditioning system was considered as the methods of counteracting the efficiency decrease resulting from the introduction of ASU and CPU. The proposed configurations and optimization allow a significant reduction of the auxiliary power of the considered unit. In consequence, the efficiency decrease was reduced by approximately 3.5% points. An economic analysis of the different structures of the oxy-fuel system and the reference air-fired power plant was also conducted using a newly developed computational algorithm built in the Excel environment. The algorithm uses a Break Even Point (BEP) method, focusing mainly on determining a break-even price of electricity. It was found that about the profitability of this investment will mainly decide the price of emission allowances. For the assumptions made, the oxy-combustion power plant will be economically comparable with a reference plant without carbon dioxide capture when the price of allowances would be between 34 and 41 €/tonne. A sensitivity analysis concerning the influence of selected components of the cash flows on the break-even price of electricity was also performed. The main results of the calculations are presented in the paper.

Anna Skorek-Osikowska; Lukasz Bartela; Janusz Kotowicz; Marcin Job

2013-01-01T23:59:59.000Z

99

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

100

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 "oxy-fuel combustion cxs" 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

Introduction to Biomass Combustion  

Science Journals Connector (OSTI)

Biomass was the major fuel in the world ... hundreds when coal then became dominant. The combustion of solid biofuels as a primary energy...

Jenny M. Jones; Amanda R. Lea-Langton…

2014-01-01T23:59:59.000Z

102

The Combustion of Solid Biomass  

Science Journals Connector (OSTI)

The combustion of solid biomass is covered in this chapter. This covers the general mechanism of combustion, moisture evaporation, devolatilisation, the combustion of the volatiles gases and tars and finally char...

Jenny M. Jones; Amanda R. Lea-Langton…

2014-01-01T23:59:59.000Z

103

Coal Combustion Science  

SciTech Connect (OSTI)

The objective of this activity is to support the Office of Fossil Energy in executing research on coal combustion science. This activity consists of basic research on coal combustion that supports both the Pittsburgh Energy Technology Center Direct Utilization Advanced Research and Technology Development Program, and the International Energy Agency Coal Combustion Science Project. Specific tasks for this activity include: (1) coal devolatilization - the objective of this risk is to characterize the physical and chemical processes that constitute the early devolatilization phase of coal combustion as a function of coal type, heating rate, particle size and temperature, and gas phase temperature and oxidizer concentration; (2) coal char combustion -the objective of this task is to characterize the physical and chemical processes involved during coal char combustion as a function of coal type, particle size and temperature, and gas phase temperature and oxygen concentration; (3) fate of mineral matter during coal combustion - the objective of this task is to establish a quantitative understanding of the mechanisms and rates of transformation, fragmentation, and deposition of mineral matter in coal combustion environments as a function of coal type, particle size and temperature, the initial forms and distribution of mineral species in the unreacted coal, and the local gas temperature and composition.

Hardesty, D.R. (ed.); Fletcher, T.H.; Hurt, R.H.; Baxter, L.L. (Sandia National Labs., Livermore, CA (United States))

1991-08-01T23:59:59.000Z

104

Fifteenth combustion research conference  

SciTech Connect (OSTI)

The BES research efforts cover chemical reaction theory, experimental dynamics and spectroscopy, thermodynamics of combustion intermediates, chemical kinetics, reaction mechanisms, combustion diagnostics, and fluid dynamics and chemically reacting flows. 98 papers and abstracts are included. Separate abstracts were prepared for the papers.

NONE

1993-06-01T23:59:59.000Z

105

Coal combustion products (CCPs  

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

combustion products (CCPs) combustion products (CCPs) are solid materials produced when coal is burned to generate electricity. Since coal provides the largest segment of U.S. electricity generation (45 percent in 2010), finding a sustainable solution for CCPs is an important environmental challenge. When properly managed, CCPs offer society environmental and economic benefits without harm to public health and safety. Research supported by the U.S. Department of Energy's (DOE) Office of Fossil Energy (FE) has made an important contribution in this regard. Fossil Energy Research Benefits Coal Combustion Products Fossil Energy Research Benefits

106

Thermal ignition combustion system  

SciTech Connect (OSTI)

A thermal ignition combustion system adapted for use with an internal combustion engine is described comprising: (a) means for providing ignition chamber walls defining an ignition chamber, the chamber walls being made of a material having a thermal conductivity greater than 20 W/m/sup 0/C. and a specific heat greater than 480J/kg/sup 0/C., the ignition chamber being in constant communication with the main combustion chamber; (b) means for maintaining the temperature of the chamber walls above a threshold temperature capable of causing ignition of a fuel; and (c) means for conducting fuel to the ignition chamber.

Kamo, R.; Kakwani, R.M.; Valdmanis, E.; Woods, M.E.

1988-04-19T23:59:59.000Z

107

Sandia Combustion Research: Technical review  

SciTech Connect (OSTI)

This report contains reports from research programs conducted at the Sandia Combustion Research Facility. Research is presented under the following topics: laser based diagnostics; combustion chemistry; reacting flow; combustion in engines and commercial burners; coal combustion; and industrial processing. Individual projects were processed separately for entry onto the DOE databases.

NONE

1995-07-01T23:59:59.000Z

108

Packed Bed Combustion: An Overview  

E-Print Network [OSTI]

;Packed Bed Combustion - University of Ottawa - CICS 2005 fuel fuel feed air products air fuel Retort) products Underfeed Combustion fuel feed air #12;Packed Bed Combustion - University of Ottawa - CICS 2005 required #12;Packed Bed Combustion - University of Ottawa - CICS 2005 Overfeed Bed fuel motion products air

Hallett, William L.H.

109

Engine Combustion & Efficiency - FEERC  

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

Engine Combustion & Efficiency Engine Combustion & Efficiency ORNL currently and historically supports the U.S. DOE on multi-cylinder and vehicle applications of diesel combustion, lean burn gasoline combustion, and low temperature combustion processes, and performs principal research on efficiency enabling technologies including emission controls, thermal energy recovery, and bio-renewable fuels. Research areas span from fundamental concepts to engine/vehicle integration and demonstration with a particular emphasis on the following areas: Thermodynamics for identifying and characterizing efficiency opportunities for engine-systems as well as the development of non-conventional combustion concepts for reducing fundamental combustion losses. Nonlinear sciences for improving the physical understanding and

110

Definition: Combustion | Open Energy Information  

Open Energy Info (EERE)

Combustion Combustion Jump to: navigation, search Dictionary.png Combustion The process of burning; chemical oxidation accompanied by the generation of light and heat.[1][2] View on Wikipedia Wikipedia Definition "Burning" redirects here. For combustion without external ignition, see spontaneous combustion. For the vehicle engine, see internal combustion engine. For other uses, see Burning (disambiguation) and Combustion (disambiguation). Error creating thumbnail: Unable to create destination directory This article's introduction section may not adequately summarize its contents. To comply with Wikipedia's lead section guidelines, please consider modifying the lead to provide an accessible overview of the article's key points in such a way that it can stand on its own as a

111

Spontaneous Human Combustion  

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

Spontaneous Human Combustion Spontaneous Human Combustion Name: S. Phillips. Age: N/A Location: N/A Country: N/A Date: N/A Question: One of our 8th grade students has tried to find information in our library about spontaneous human combustion, but to no avail. Could you tell us where we might locate a simple reference, or provide some in information about this subject for him. Replies: Sorry, but this is definitely "fringe science"...try asking in bookstores. I seem to recall one of those "believe it or not" type of TV shows did an episode on spontaneous human combustion a few years ago in which they reported on some British scientists who investigated this purported phenomenon. Remember that people (back in the Dark Ages, and before) used to believe in "spontaneous generation" of certain plants and animals because they were not aware of the reproduction methods used by those plants and animals.

112

Advanced diesel combustion  

Science Journals Connector (OSTI)

Future emission norms will further reduce the vehicle emissions of diesel engines. To meet the goal of achieving these stringent limits while maintaining attractive attributes of marketability, the combustion ...

Dirk Adolph; Hartwig Busch; Stefan Pischinger; Andreas Kolbeck…

2008-01-01T23:59:59.000Z

113

Advanced Combustion Technologies  

Broader source: Energy.gov [DOE]

The workhorse of America's electric power sector is the coal-fired power plant. Today, coal combustion plants account for more than half of the Nation's electric power generation. Largely because...

114

Catalytic Combustion Processes  

Science Journals Connector (OSTI)

This work presents experimental data on the effect of catalytic additives on the combustion characteristics of ammonium nitrate and perchlorate and the explosives of different classes. Burning rates are determ...

A. P. Glaskova

1991-01-01T23:59:59.000Z

115

Advanced Combustion Technology to Enable High Efficiency Clean...  

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

Combustion Technology to Enable High Efficiency Clean Combustion Advanced Combustion Technology to Enable High Efficiency Clean Combustion Summary of advanced combustion research...

116

Coal combustion system  

DOE Patents [OSTI]

In a coal combustion system suitable for a gas turbine engine, pulverized coal is transported to a rich zone combustor and burned at an equivalence ratio exceeding 1 at a temperature above the slagging temperature of the coal so that combustible hot gas and molten slag issue from the rich zone combustor. A coolant screen of water stretches across a throat of a quench stage and cools the combustible gas and molten slag to below the slagging temperature of the coal so that the slag freezes and shatters into small pellets. The pelletized slag is separated from the combustible gas in a first inertia separator. Residual ash is separated from the combustible gas in a second inertia separator. The combustible gas is mixed with secondary air in a lean zone combustor and burned at an equivalence ratio of less than 1 to produce hot gas motive at temperature above the coal slagging temperature. The motive fluid is cooled in a dilution stage to an acceptable turbine inlet temperature before being transported to the turbine.

Wilkes, Colin (Lebanon, IN); Mongia, Hukam C. (Carmel, IN); Tramm, Peter C. (Indianapolis, IN)

1988-01-01T23:59:59.000Z

117

Sandia Combustion Research Program  

SciTech Connect (OSTI)

During the late 1970s, in response to a national energy crisis, Sandia proposed to the US Department of Energy (DOE) a new, ambitious program in combustion research. Shortly thereafter, the Combustion Research Facility (CRF) was established at Sandia's Livermore location. Designated a ''user facility,'' the charter of the CRF was to develop and maintain special-purpose resources to support a nationwide initiative-involving US inventories, industry, and national laboratories--to improve our understanding and control of combustion. This report includes descriptions several research projects which have been simulated by working groups and involve the on-site participation of industry scientists. DOE's Industry Technology Fellowship program, supported through the Office of Energy Research, has been instrumental in the success of some of these joint efforts. The remainder of this report presents results of calendar year 1988, separated thematically into eleven categories. Referred journal articles appearing in print during 1988 and selected other publications are included at the end of Section 11. Our traditional'' research activities--combustion chemistry, reacting flows, diagnostics, engine and coal combustion--have been supplemented by a new effort aimed at understanding combustion-related issues in the management of toxic and hazardous materials.

Johnston, S.C.; Palmer, R.E.; Montana, C.A. (eds.)

1988-01-01T23:59:59.000Z

118

Near-Zero Emissions Oxy-Combustion Flue Gas Purification - Power Plant Performance  

SciTech Connect (OSTI)

A technical feasibility assessment was performed for retrofitting oxy-fuel technology to an existing power plant burning low sulfur PRB fuel and high sulfur bituminous fuel. The focus of this study was on the boiler/power generation island of a subcritical steam cycle power plant. The power plant performance in air and oxy-firing modes was estimated and modifications required for oxy-firing capabilities were identified. A 460 MWe (gross) reference subcritical PC power plant was modeled. The reference air-fired plant has a boiler efficiency (PRB/Bituminous) of 86.7%/89.3% and a plant net efficiency of 35.8/36.7%. Net efficiency for oxy-fuel firing including ASU/CPU duty is 25.6%/26.6% (PRB/Bituminous). The oxy-fuel flue gas recirculation flow to the boiler is 68%/72% (PRB/bituminous) of the flue gas (average O{sub 2} in feed gas is 27.4%/26.4%v (PRB/bituminous)). Maximum increase in tube wall temperature is less than 10ºF for oxy-fuel firing. For oxy-fuel firing, ammonia injected to the SCR was shut-off and the FGD is applied to remove SOx from the recycled primary gas stream and a portion of the SOx from the secondary stream for the high sulfur bituminous coal. Based on CFD simulations it was determined that at the furnace outlet compared to air-firing, SO{sub 3}/SO{sub 2} mole ratio is about the same, NOx ppmv level is about the same for PRB-firing and 2.5 times for bituminous-firing due to shutting off the OFA, and CO mole fraction is approximately double. A conceptual level cost estimate was performed for the incremental equipment and installation cost of the oxyfuel retrofit in the boiler island and steam system. The cost of the retrofit is estimated to be approximately 81 M$ for PRB low sulfur fuel and 84 M$ for bituminous high sulfur fuel.

Andrew Seltzer; Zhen Fan

2011-03-01T23:59:59.000Z

119

Combustion Model for Engine Concept Development | Department...  

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

Combustion Model for Engine Concept Development Presentation shows how 1-cylinder testing, 3D combustion CFD and 1D gas exchange with an advanced combustion model are used...

120

Combustible structural composites and methods of forming combustible structural composites  

DOE Patents [OSTI]

Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.

Daniels, Michael A.; Heaps, Ronald J.; Steffler, Eric D.; Swank, W. David

2013-04-02T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Combustible structural composites and methods of forming combustible structural composites  

DOE Patents [OSTI]

Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.

Daniels, Michael A. (Idaho Falls, ID); Heaps, Ronald J. (Idaho Falls, ID); Steffler, Eric D (Idaho Falls, ID); Swank, William D. (Idaho Falls, ID)

2011-08-30T23:59:59.000Z

122

Combustion Safety Overview  

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

March 1-2, 2012 March 1-2, 2012 Building America Stakeholders Meeting Austin, Texas Combustion Safety in the Codes Larry Brand Gas Technology Institute Acknowledgement to Paul Cabot - American Gas Association 2 | Building America Program www.buildingamerica.gov Combustion Safety in the Codes Widely adopted fuel gas codes: * National Fuel Gas Code - ANSI Z223.1/NFPA 54, published by AGA and NFPA (NFGC) * International Fuel Gas Code - published by the International Code Council (IFGC) * Uniform Plumbing Code published by IAPMO (UPC) Safety codes become requirements when adopted by the Authority Having Jurisdiction (governments or fire safety authorities) 3 | Building America Program www.buildingamerica.gov Combustion Safety in the Codes Formal Relationships Between these codes: - The IFGC extracts many safety

123

A MODEL FOR POROUS-MEDIUM COMBUSTION  

Science Journals Connector (OSTI)

......these applied in coal combustion appears in...understanding of the chemistry of combustion...GLASSMAN, Combustion (Academic Press...ESSENHIGH, In Chemistry of Coal Utilization...POROUS-MEDIUM COMBUSTION 177 8. D. A......

J. NORBURY; A. M. STUART

1989-02-01T23:59:59.000Z

124

Vehicle Technologies Office: Combustion Engine Research  

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

Combustion Engine Combustion Engine Research to someone by E-mail Share Vehicle Technologies Office: Combustion Engine Research on Facebook Tweet about Vehicle Technologies Office: Combustion Engine Research on Twitter Bookmark Vehicle Technologies Office: Combustion Engine Research on Google Bookmark Vehicle Technologies Office: Combustion Engine Research on Delicious Rank Vehicle Technologies Office: Combustion Engine Research on Digg Find More places to share Vehicle Technologies Office: Combustion Engine Research on AddThis.com... Just the Basics Hybrid & Vehicle Systems Energy Storage Advanced Power Electronics & Electrical Machines Advanced Combustion Engines Combustion Engines Emission Control Waste Heat Recovery Fuels & Lubricants Materials Technologies Combustion Engine Research

125

Vehicle Technologies Office: Advanced Combustion Engines  

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

Advanced Combustion Advanced Combustion Engines to someone by E-mail Share Vehicle Technologies Office: Advanced Combustion Engines on Facebook Tweet about Vehicle Technologies Office: Advanced Combustion Engines on Twitter Bookmark Vehicle Technologies Office: Advanced Combustion Engines on Google Bookmark Vehicle Technologies Office: Advanced Combustion Engines on Delicious Rank Vehicle Technologies Office: Advanced Combustion Engines on Digg Find More places to share Vehicle Technologies Office: Advanced Combustion Engines on AddThis.com... Just the Basics Hybrid & Vehicle Systems Energy Storage Advanced Power Electronics & Electrical Machines Advanced Combustion Engines Combustion Engines Emission Control Waste Heat Recovery Fuels & Lubricants Materials Technologies Advanced Combustion Engines

126

Thermal ignition combustion system  

DOE Patents [OSTI]

The thermal ignition combustion system comprises means for providing walls defining an ignition chamber, the walls being made of a material having a thermal conductivity greater than 20 W/m C and a specific heat greater than 480 J/kg C with the ignition chamber being in constant communication with the main combustion chamber, means for maintaining the temperature of the walls above a threshold temperature capable of causing ignition of a fuel, and means for conducting fuel to the ignition chamber. 8 figs.

Kamo, R.; Kakwani, R.M.; Valdmanis, E.; Woods, M.E.

1988-04-19T23:59:59.000Z

127

Studies in combustion dynamics  

SciTech Connect (OSTI)

The goal of this program is to develop a fundamental understanding and a quantitative predictive capability in combustion modeling. A large part of the understanding of the chemistry of combustion processes comes from {open_quotes}chemical kinetic modeling.{close_quotes} However, successful modeling is not an isolated activity. It necessarily involves the integration of methods and results from several diverse disciplines and activities including theoretical chemistry, elementary reaction kinetics, fluid mechanics and computational science. Recently the authors have developed and utilized new tools for parallel processing to implement the first numerical model of a turbulent diffusion flame including a {open_quotes}full{close_quotes} chemical mechanism.

Koszykowski, M.L. [Sandia National Laboratories, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

128

Thermal ignition combustion system  

SciTech Connect (OSTI)

The thermal ignition combustion system comprises means for providing walls defining an ignition chamber, the walls being made of a material having a thermal conductivity greater than 20 W/m.degree. C. and a specific heat greater than 480 J/kg.degree. C. with the ignition chamber being in constant communication with the main combustion chamber, means for maintaining the temperature of the walls above a threshold temperature capable of causing ignition of a fuel, and means for conducting fuel to the ignition chamber.

Kamo, Roy (Columbus, IN); Kakwani, Ramesh M. (Columbus, IN); Valdmanis, Edgars (Columbus, IN); Woods, Melvins E. (Columbus, IN)

1988-01-01T23:59:59.000Z

129

Nanoparticle Emissions from Internal Combustion Engines | Department...  

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

Nanoparticle Emissions from Internal Combustion Engines Nanoparticle Emissions from Internal Combustion Engines 2004 Diesel Engine Emissions Reduction (DEER) Conference...

130

Improving alternative fuel utilization: detailed kinetic combustion...  

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

alternative fuel utilization: detailed kinetic combustion modeling & experimental testing Improving alternative fuel utilization: detailed kinetic combustion modeling &...

131

Mechanism of Hydrocarbon Formation in Combustion Processes  

Science Journals Connector (OSTI)

Emissions from transportation systems that derive their energy directly from combustion processes include products of incomplete combustion, oxides of...

R. A. Matula

1973-01-01T23:59:59.000Z

132

Reversed flow fluidized-bed combustion apparatus  

DOE Patents [OSTI]

The present invention is directed to a fluidized-bed combustion apparatus provided with a U-shaped combustion zone. A cyclone is disposed in the combustion zone for recycling solid particulate material. The combustion zone configuration and the recycling feature provide relatively long residence times and low freeboard heights to maximize combustion of combustible material, reduce nitrogen oxides, and enhance sulfur oxide reduction.

Shang, Jer-Yu (Fairfax, VA); Mei, Joseph S. (Morgantown, WV); Wilson, John S. (Morgantown, WV)

1984-01-01T23:59:59.000Z

133

Aviation Combustion Toxicology: An Overview  

Science Journals Connector (OSTI)

......in a radiant heat furnace. Rats...the produced combustion products in...in both the combustion tube and radiant heat systems proved...literature data for CO2, low...acrolein, and heat expo- sures...primary toxic combustion gases and are...structures. The hydrocarbon constituents......

Arvind K. Chaturvedi

2010-01-01T23:59:59.000Z

134

Four Lectures on Turbulent Combustion  

E-Print Network [OSTI]

, combustion in a Diesel engine or in furnaces essentially taakes place under non-premixed conditions. In the Diesel engine a liquid fuel spray is injected into hot compressed air, the fuel evaporates and mixes combustion are in general subdivided into two classes: premixed or non-premixed combustion. For example

Peters, Norbert

135

Combustion powered linear actuator  

DOE Patents [OSTI]

The present invention provides robotic vehicles having wheeled and hopping mobilities that are capable of traversing (e.g. by hopping over) obstacles that are large in size relative to the robot and, are capable of operation in unpredictable terrain over long range. The present invention further provides combustion powered linear actuators, which can include latching mechanisms to facilitate pressurized fueling of the actuators, as can be used to provide wheeled vehicles with a hopping mobility.

Fischer, Gary J. (Albuquerque, NM)

2007-09-04T23:59:59.000Z

136

US DRIVE Advanced Combustion and Emission Control Technical Team Roadmap  

Broader source: Energy.gov [DOE]

The ACEC focuses on advanced engine and aftertreatment technology for three major combustion strategies: (1) Low-Temperature Combustion, (2) Dilute Gasoline combustion, and (3) Clean Diesel Combustion.

137

Assessment of Combustion and Turbulence Models for the Simulation...  

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

Combustion and Turbulence Models for the Simulation of Combustion Processes in a DI Diesel Engine Assessment of Combustion and Turbulence Models for the Simulation of Combustion...

138

US DRIVE Advanced Combustion and Emission Control Technical Team...  

Energy Savers [EERE]

for three major combustion strategies: (1) Low-Temperature Combustion, (2) Dilute Gasoline combustion, and (3) Clean Diesel Combustion. acecroadmapjune2013.pdf More Documents...

139

NETL: Combustion Technologies  

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

Abbreviations & Acronyms Abbreviations & Acronyms Reference Shelf Solicitations & Awards Abbreviations & Acronyms The Combustion Technologies Product uses a number of abbreviations and acronyms. This web page gives you a definition of frequently used terms, as follows: 1½-Generation PFBC -- A PFBC plant where the hot (about 1400ºF) PFBC exhaust gases are used as a vitiated air supply for a natural gas combustor supplying high-temperature gas (above 2000ºF) to a combustion turbine expander (synonym for "PFB-NGT"). 1st-Generation PFBC -- Commercial PFBC technology where an unfired low-temperature (below 1650ºF) ruggedized turbine expander expands PFBC exhaust gases (synonym for "PFB-EGT"). 2nd-Generation PFBC (see synonyms: "APFBC," "PFB-CGT") -- Advanced PFBC where a carbonizer (mild gasifier) provides hot (about 1400ºF) coal-derived synthetic fuel gas to a special topping combustor. The carbonizer char is burned in the PFBC, and the PFBC exhaust is used as a hot (about 1400ºF) vitiated air supply for the topping combustor. The syngas and vitiated air are burned in a topping combustor to provide high-temperature gas (above 1700ºF) to a combustion turbine expander.

140

NETL: Combustion Technologies  

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

Nebraska Public Power District's Sheldon Station with APFBC Technology Nebraska Public Power District's Sheldon Station with APFBC Technology FBC Repower APFBC AES Greenidge APFBC Dan River FBC, APFBC Four Corners CHIPPS H.F. Lee Products Summary Sheldon Summary APFBC Sheldon GFBCC Sheldon APFBC L.V. Sutton Contents: APFBC Repowering Project Summary Key Features Site Layout Performance Environmental Characteristics Cost Other Combustion Systems Repowering Study Links: A related study is underway that would repower Sheldon Unit 1 and Unit 2 with gasification fluidized-bed combined cycle technology (GFBCC). CLICK HERE to find out more about repowering the Sheldon station with GFBCC instead. APFBC Repowering Project Summary Click on picture to enlarge Advanced circulating pressurized fluidized-bed combustion combined cycle systems (APFBC) are systems with jetting-bed pressurized fluidized-bed (PFB) carbonizer/gasifier and circulating PFBC combustor. The PFB carbonizer and PFBC both operate at elevated pressures (10 to 30 times atmospheric pressure) to provide syngas for operating a gas turbine topping combustor giving high cycle energy efficiency. The remaining char from the PFB carbonizer is burned in the pressurized PFBC. The combustion gas from the PFB also feeds thermal energy to the gas turbine topping combustor. This provides combined cycle plant efficiency on coal by providing the opportunity to generate electricity using both high efficiency gas turbines and steam.

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Stretch Efficiency for Combustion Engines: Exploiting New Combustion...  

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

boost. * H 2 enrichment extends lean limit, improves C p C v ratio, lowers cylinder heat loss, assists cold start, lowers combustion irreversibility. IC Engine Work Reformer...

142

Sandia National Laboratories: Diesel Combustion  

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

Diesel Combustion Caterpillar, Sandia CRADA Opens Door to Multiple Research Projects On April 17, 2013, in Capabilities, Computational Modeling & Simulation, CRF, Materials...

143

Improve Your Boiler's Combustion Efficiency  

SciTech Connect (OSTI)

This revised ITP tip sheet on boiler combustion efficiency provides how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.

Not Available

2006-01-01T23:59:59.000Z

144

Municipal Waste Combustion (New Mexico)  

Broader source: Energy.gov [DOE]

This rule establishes requirements for emissions from, and design and operation of, municipal waste combustion units. "Municipal waste" means all materials and substances discarded from residential...

145

ALS Evidence Confirms Combustion Theory  

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

are produced, generally, when insufficient oxygen or other factors result in incomplete combustion of organic matter (e.g., in engines and incinerators, when biomass burns in...

146

Numerical Modeling of HCCI Combustion  

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

Numerical Modeling of HCCI Combustion Salvador M. Aceves, Daniel L. Flowers, J. Ray Smith, Joel Martinez-Frias, Francisco Espinosa-Loza, Tim Ross, Bruce Buchholz, Nick...

147

Combustion Byproducts Recycling Consortium  

SciTech Connect (OSTI)

Each year, over 100 million tons of solid byproducts are produced by coal-burning electric utilities in the United States. Annual production of flue gas desulfurization (FGD) byproducts continues to increase as the result of more stringent sulfur emission restrictions. In addition, stricter limits on NOx emissions mandated by the 1990 Clean Air Act have resulted in utility burner/boiler modifications that frequently yield higher carbon concentrations in fly ash, which restricts the use of the ash as a cement replacement. Controlling ammonia in ash is also of concern. If newer, 'clean coal' combustion and gasification technologies are adopted, their byproducts may also present a management challenge. The objective of the Combustion Byproducts Recycling Consortium (CBRC) is to develop and demonstrate technologies to address issues related to the recycling of byproducts associated with coal combustion processes. A goal of CBRC is that these technologies, by the year 2010, will lead to an overall ash utilization rate from the current 34% to 50% by such measures as increasing the current rate of FGD byproduct use and increasing in the number of uses considered 'allowable' under state regulations. Another issue of interest to the CBRC would be to examine the environmental impact of both byproduct utilization and disposal. No byproduct utilization technology is likely to be adopted by industry unless it is more cost-effective than landfilling. Therefore, it is extremely important that the utility industry provide guidance to the R&D program. Government agencies and private-sector organizations that may be able to utilize these materials in the conduct of their missions should also provide input. The CBRC will serve as an effective vehicle for acquiring and maintaining guidance from these diverse organizations so that the proper balance in the R&D program is achieved.

Paul Ziemkiewicz; Tamara Vandivort; Debra Pflughoeft-Hassett; Y. Paul Chugh; James Hower

2008-08-31T23:59:59.000Z

148

Combustion Byproducts Recycling Consortium  

SciTech Connect (OSTI)

Each year, over 100 million tons of solid byproducts are produced by coal-burning electric utilities in the United States. Annual production of flue gas desulfurization (FGD) byproducts continues to increase as the result of more stringent sulfur emission restrictions. In addition, stricter limits on NOx emissions mandated by the 1990 Clean Air Act have resulted in utility burner/boiler modifications that frequently yield higher carbon concentrations in fly ash, which restricts the use of the ash as a cement replacement. Controlling ammonia in ash is also of concern. If newer, “clean coal” combustion and gasification technologies are adopted, their byproducts may also present a management challenge. The objective of the Combustion Byproducts Recycling Consortium (CBRC) is to develop and demonstrate technologies to address issues related to the recycling of byproducts associated with coal combustion processes. A goal of CBRC is that these technologies, by the year 2010, will lead to an overall ash utilization rate from the current 34% to 50% by such measures as increasing the current rate of FGD byproduct use and increasing in the number of uses considered “allowable” under state regulations. Another issue of interest to the CBRC would be to examine the environmental impact of both byproduct utilization and disposal. No byproduct utilization technology is likely to be adopted by industry unless it is more cost-effective than landfilling. Therefore, it is extremely important that the utility industry provide guidance to the R&D program. Government agencies and privatesector organizations that may be able to utilize these materials in the conduct of their missions should also provide input. The CBRC will serve as an effective vehicle for acquiring and maintaining guidance from these diverse organizations so that the proper balance in the R&D program is achieved.

Ziemkiewicz, Paul; Vandivort, Tamara; Pflughoeft-Hassett, Debra; Chugh, Y Paul; Hower, James

2008-08-31T23:59:59.000Z

149

Space shuttle based microgravity smoldering combustion experiments  

E-Print Network [OSTI]

zone, and smolder heat of combustion (energy per unit massand Q is the smolder heat of combustion. The mass fluxes ofdata. The smolder heat of combustion is not well determined

Walther, David C; Fernandez-Pello, Carlos; Urban, David L

1999-01-01T23:59:59.000Z

150

Combustion Catalysts in Industry- An Update  

E-Print Network [OSTI]

applications of combustion catalysts for coal are presented. Combustion efficiency and calculations are discussed, followed by an explanation of the theories of combustion catalysis and a review of three case histories....

Merrell, G. A.; Knight, R. S.

151

Self-tuning regulators for combustion oscillations  

Science Journals Connector (OSTI)

...interaction of acoustic waves and combustion processes. An abundant literature...numerical simulations of the combustion processes and coupled fluid dynamics...nonlinear analysis of controlled combustion processes. In Proc. 1999 IEEE Int...

2003-01-01T23:59:59.000Z

152

Numerical simulations of ion transport membrane oxy-fuel reactors for CO? capture applications  

E-Print Network [OSTI]

Numerical simulations were performed to investigate the key features of oxygen permeation and hydrocarbon conversion in ion transport membrane (ITM) reactors. ITM reactors have been suggested as a novel technology to enable ...

Hong, Jongsup

2013-01-01T23:59:59.000Z

153

Ignition behaviour of individual pulverized coal particles in air and oxy-fuel environments.  

E-Print Network [OSTI]

??Research Doctorate - Doctor of Philosophy (PhD) In recent years, increasing concern over global warming and climate change and its connection to CO2 emissions have… (more)

Abdul Gani, Zeenathul Farida

2011-01-01T23:59:59.000Z

154

Combustion-thermoelectric tube  

SciTech Connect (OSTI)

In direct combustion-thermoelectric energy conversion, direct fuel injection and reciprocation of the air flowing in a solid matrix are combined with the solid conduction to allow for obtaining super-adiabatic temperatures at the hot junctions. While the solid conductivity is necessary, the relatively large thermal conductivity of the available high-temperature thermoelectric materials (e.g., Si-Ge alloys) results in a large conduction loss from the hot junctions and deteriorates the performance. Here a combustion-thermoelectric tube is introduced and analyzed. Radially averaged temperatures are used for the fluid and solid phases. A combination of external cooling of the cold junctions, and direct injection of the fuel, has been used to increase the energy conversion efficiency for low thermal conductivity, high-melting temperature thermoelectric materials. The parametric study (geometry, flow, stoichiometry, materials) shows that with the current high figure of merit, high temperature Si{sub 0.7}Ge{sub 0.3} properties, a conversion efficiency of about 11% is achievable. With lower thermal conductivities for these high-temperature materials, efficiencies about 25% appear possible. This places this energy conversion in line with the other high efficiency, direct electric power generation methods.

Park, C.W.; Kaviany, M.

1999-07-01T23:59:59.000Z

155

Ultrarich Filtration Combustion of Ethane  

Science Journals Connector (OSTI)

Ultrarich filtration combustion of ethane is studied in a porous medium composed of alumina spheres with the aim to achieve optimized conversion to hydrogen and syngas. ... Dhamrat, R. S.; Ellzey, J. L.Numerical and experimental study of the conversion of methane to hydrogen in a porous media reactor Combust. ...

Mario Toledo; Khriscia Utria; Alexei V. Saveliev

2014-01-28T23:59:59.000Z

156

A Generalized Pyrolysis Model for Combustible Solids  

E-Print Network [OSTI]

model. ?H c is the heat of combustion, and the ratio ?H c /?may have widely varying heats of combustion (CO vs. gaseous

Lautenberger, Chris

2007-01-01T23:59:59.000Z

157

Optimization of Advanced Diesel Engine Combustion Strategies...  

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

Optimization of Advanced Diesel Engine Combustion Strategies Optimization of Advanced Diesel Engine Combustion Strategies 2010 DOE Vehicle Technologies and Hydrogen Programs Annual...

158

Advanced Combustion Concepts - Enabling Systems and Solutions...  

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

engine * Integration of proposed air path and HCCI combustion control strategies into ECU software * Prototype level 2 updates and proof of combustion concept for vehicle readiness...

159

Advanced Combustion Concepts - Enabling Systems and Solutions...  

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

engine installed and vehicle available for application, emission and fuel economy optimization with advanced combustion modes. 4 Advanced combustion control strategy, capable of...

160

Premix charge, compression ignition combustion system optimization...  

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

Premix charge, compression ignition combustion system optimization Premix charge, compression ignition combustion system optimization Presentation given at DEER 2006, August 20-24,...

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Vehicle Technologies Office: Advanced Combustion Engines | Department...  

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

Batteries Fuel Efficiency & Emissions Combustion Engines Fuel Effects on Combustion Idle Reduction Emissions Waste Heat Recovery Lightweighting Parasitic Loss Reduction Lubricants...

162

Sandia Hydrogen Combustion Research | Department of Energy  

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

Sandia Hydrogen Combustion Research Sandia Hydrogen Combustion Research Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on February 25, 2008...

163

Integrated Nozzle Flow, Spray, Combustion, & Emission Modeling...  

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

Spray, Combustion, & Emission Modeling using KH-ACT Primary Breakup Model & Detailed Chemistry Integrated Nozzle Flow, Spray, Combustion, & Emission Modeling using KH-ACT Primary...

164

Combustion of viscous hydrocarbons  

SciTech Connect (OSTI)

A method is described for utilizing viscous hydrocarbons as combustible pre-atomized fuels, comprising: (A) forming a hydrocarbon-in-water emulsion using an effective amount of a surfactant package comprising at least one water-soluble surfactant, the hydrocarbon-in-water emulsion (1) comprising a hydrocarbon characterized by API gravity of about 20/sup 0/ API or less, viscosity of about 1000 centipoise or greater at 212/sup 0/F., a paraffin content of about 50% by weight or less and, an aromatic content of about 15% by weight or greater, and (2) having a hydrocarbon water ratio from about 60:40 to about 90:10 by volume; and (B) burning the resultant hydrocarbon-in-water emulsion.

Hayes, M.E.; Hrebenar, K.R.; Murphy, P.L.; Futch, L.E. Jr.; Deal, J.F. III; Bolden, P.L. Jr.

1987-08-04T23:59:59.000Z

165

Combustion of viscous hydrocarbons  

SciTech Connect (OSTI)

A method is described for utilizing viscous hydrocarbons as combustible fuels comprising: (A) forming a hydrocarbosol using a surfactant package in a proportion of about 1:100 to about 1:20,000 by weight based on hydrocarbon, (1) the surfactant package comprising (a) at least one water-soluble surfactant, an effective amount of which surfactant promotes emulsification of a hydrocarbon with API gravity of about 20/sup 0//sup o/ API or less; and (b) at least one water-soluble bioemulsifier, being a microboally-derived substance which predominantly resides at hydrocarbon/water interfaces to substantially surround hydrocarbon droplets in hydrocarbon-in-water emulsions; (2) the hydrocarbosol (a) comprising a hydrocarbon characterized by an API gravity of about 20/sup 0//sup o/ API or less; (b) having a hydrocarbon:water ratio of about 70:30 by volume; and (B) burning the resultant hydrocarbosol.

Hayes, M.E.; Hrebenar, K.R.; Murphy, P.L.; Futch, L.E. Jr.; Deal, J.F. III

1986-10-21T23:59:59.000Z

166

NETL: Combustion Technologies  

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

Gas Turbines for APFBC Gas Turbines for APFBC FBC Repower Simple Description Detailed Description APFBC Specs GTs for APFBC Suited for Repowering Existing Power Plants with Advanced Pressurized Fluidized-Bed Combined Cycles APFBC combined cycles have high energy efficiency levels because they use modern, high-temperature, high-efficiency gas turbines as the core of a combined power cycle. This web page discusses a current U.S. Department of Energy project that is evaluating combustion turbines suited for repowering existing steam plants. The natural-gas-fueled version of the Siemens Westinghouse Power Corporation W501F. Modified versions of this gas turbine core are suited for operating in APFBC power plants. Contents: Introduction APFBC Repowering Considerations

167

Final_Tech_Session_Schedule_and_Location.xls  

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

The Potential for Clean Energy Production using The Potential for Clean Energy Production using Oxy-Fuel Combustion and Integrated Pollutant Removal Ochs, Oryshchyn, Weber, Summers May 2-5, 2005, Hilton Alexandria Mark Center, Alexandria Virginia Abstract Effective remediation of flue gas produced by an oxy-fuel coal combustion process has been proven at bench scale in the course of cooperative research between USDOE's Albany Research Center (ARC) and Jupiter Oxygen Corporation. All combustion gas pollutants were captured, including CO 2 which was compressed to a liquefied state suitable for sequestration. Current laboratory-scale research and the future of combined oxy-fuel/IPR systems are discussed. Background * Project evolved from CO 2 sequestration research started in 2000 - What can be done with available technology?

168

Low Temperature Combustion Demonstrator for High Efficiency Clean Combustion  

Broader source: Energy.gov [DOE]

Applied low temperature combustion to the Navistar 6.4L V8 engine with 0.2g NOx/bhp-hr operation attained at the rated 16.5 BMEP

169

Modeling of Combustion Processes in Internal Combustion Engines  

Science Journals Connector (OSTI)

Improving internal combustion engines (ICE) and increasing the quality of operation are linked with the necessity of maximally increasing the degree of compression. For ICE with spark ignition (otto cycle), th...

V. A. Vinokurov; V. A. Kaminskii; V. A. Frost…

2000-11-01T23:59:59.000Z

170

Some recent advances in droplet combustion  

Science Journals Connector (OSTI)

This paper reviews the theoretical and experimental advances in droplet combustion since the 1982 Second International Colloquium on Drops and Bubbles. Specific topics discussed include multicomponent droplet combustion and microexplosion convection droplet combustion the combustion of slurries propellants and hazardous wastes soot formation in droplet burning and several miscellaneous subjects. Areas of further research are suggested.

C. K. Law

1990-01-01T23:59:59.000Z

171

NETL: IEP – Oxy-Combustion CO2 Emissions Control - Pilot-Scale  

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

Pilot-Scale Demonstration Of A Novel, Low-Cost Oxygen Supply Process And Its Integration With Oxy-Fuel Coal-Fired Boilers Pilot-Scale Demonstration Of A Novel, Low-Cost Oxygen Supply Process And Its Integration With Oxy-Fuel Coal-Fired Boilers Project No.: FC26-06NT42748 Schematic of the Ceramic Autothermal Recovery Process. Schematic of the Ceramic Autothermal Recovery Process. The Linde Group (formerly BOC Group, Inc.) will conduct pilot-scale testing of their Ceramic Autothermal Recovery (CAR) oxygen (O2) generation process integrated with a coal-fired combustor to produce a carbon dioxide (CO2) rich flue gas. The CAR process uses the O2 storage properties of perovskites to adsorb O2 from air in a fixed bed and then release the adsorbed O2 into a sweep gas, such as recycled flue gas, that can be sent to the furnace. As shown in the figure below, the process is made continuous by operating multiple beds in a cycle.

172

Staged Combustion of Pulverized Coal  

Science Journals Connector (OSTI)

The emissions of nitrogen oxides are much higher with the combustion of fossil fuels containing organic bound nitrogen compounds than with clean fuels like natural gas and light distillate oil. During combusti...

H. Kremer; R. Mechenbier; W. Schulz

1987-01-01T23:59:59.000Z

173

Light Duty Efficient Clean Combustion  

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

fuel efficiency over the FTP city drive cycle by 10.5% over today's state-of-the-art diesel engine. Develop & design an advanced combustion system that synergistically meets...

174

20 - Chemical looping combustion (CLC)  

Science Journals Connector (OSTI)

Abstract: Chemical-looping combustion (CLC) is a new combustion technology with inherent separation of the greenhouse gas CO2. The technology involves the use of a metal oxide as an oxygen carrier which transfers oxygen from combustion air to the fuel, and hence a direct contact between air and fuel is avoided. Two inter-connected fluidized beds, i.e. fuel reactor and air reactor, are used in the process. The outlet gas from the fuel reactor consists ideally of CO2 and H2O, and the latter is easily removed by condensation. This chapter presents the basic principles, gives an overview of oxygen-carrier materials and operational experiences, discusses the application to gaseous, liquid and solid fuels, and the use for combustion as well as for hydrogen production.

A. Lyngfelt

2013-01-01T23:59:59.000Z

175

Chemical Kinetics of Combustion Processes  

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

of Combustion Processes Hai Wang B. Yang, J. Camacho, S. Lieb, S. Memarzadeh, S.-K. Gao and S. Koumlis University of Southern California 2010 CEFRC Conference Benzene + O( 3 P) ...

176

Plum Combustion | Open Energy Information  

Open Energy Info (EERE)

Plum Combustion Plum Combustion Jump to: navigation, search Name Plum Combustion Place Atlanta, Georgia Product Combustion technology, which reduces NOx-emissions. Coordinates 33.748315°, -84.391109° 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":33.748315,"lon":-84.391109,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

177

Fireside Corrosion  

SciTech Connect (OSTI)

Oxy-fuel fireside research goals are: (1) determine the effect of oxyfuel combustion on fireside corrosion - flue gas recycle choice, staged combustion ramifications; and (2) develop methods to use chromia solubility in ash as an ash corrosivity measurement - synthetic ashes at first, then boiler and burner rig ashes.

Holcomb, Gordon

2011-07-14T23:59:59.000Z

178

Combustion method for simultaneous control of nitrogen oxides and products of incomplete combustion  

SciTech Connect (OSTI)

A method is described for combusting material with controlled generation of both nitrogen oxides and products of incomplete combustion comprising: (A) combusting material in a first combustion zone to produce gaseous exhaust containing products of incomplete combustion and products of complete combustion; (B) passing the gaseous exhaust from the first combustion zone into a second combustion zone having a width and an axial direction; (C) injecting through a lance with an orientation substantially parallel to said axial direction at least one stream of oxidant, without fuel, having a diameter less than 1/100 of the width of the second combustion zone and having an oxygen concentration of at least 30% into the second combustion zone at a high velocity of at least 300 feet per second; (D) aspirating products of incomplete combustion into the high velocity oxidant; (E) combusting products of incomplete combustion aspirated into the high velocity oxidant with high velocity oxidant within the second combustion zone to carry out a stable combustion by the mixing of the aspirated products of incomplete combustion with the high velocity oxidant; and (F) spreading out the combustion reaction by aspiration of products of complete combustion into the oxidant, said products of complete combustion also serving as a heat sink, to inhibit NO[sub x] formation.

Ho, Min-Da.

1993-05-25T23:59:59.000Z

179

Chemical Looping Combustion Kinetics  

SciTech Connect (OSTI)

One of the most promising methods of capturing CO{sub 2} emitted by coal-fired power plants for subsequent sequestration is chemical looping combustion (CLC). A powdered metal oxide such as NiO transfers oxygen directly to a fuel in a fuel reactor at high temperatures with no air present. Heat, water, and CO{sub 2} are released, and after H{sub 2}O condensation the CO{sub 2} (undiluted by N{sub 2}) is ready for sequestration, whereas the nickel metal is ready for reoxidation in the air reactor. In principle, these processes can be repeated endlessly with the original nickel metal/nickel oxide participating in a loop that admits fuel and rejects ash, heat, and water. Our project accumulated kinetic rate data at high temperatures and elevated pressures for the metal oxide reduction step and for the metal reoxidation step. These data will be used in computational modeling of CLC on the laboratory scale and presumably later on the plant scale. The oxygen carrier on which the research at Utah is focused is CuO/Cu{sub 2}O rather than nickel oxide because the copper system lends itself to use with solid fuels in an alternative to CLC called 'chemical looping with oxygen uncoupling' (CLOU).

Edward Eyring; Gabor Konya

2009-03-31T23:59:59.000Z

180

Advanced High Efficiency Clean Diesel Combustion with Low Cost...  

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

Efficiency Clean Diesel Combustion with Low Cost for Hybrid Engines Advanced High Efficiency Clean Diesel Combustion with Low Cost for Hybrid Engines Clean, in-cylinder combustion...

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Low-Temperature Automotive Diesel Combustion | Department of...  

Office of Environmental Management (EM)

in Low Temperature Automotive Diesel Combustion Systems Mixture Formation in a Light-Duty Diesel Engine Light Duty Combustion Research: Advanced Light-Duty Combustion Experiments...

182

Oxy-Combustion CO2 Control | netl.doe.gov  

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

Advanced Combustion Oxy-Combustion Chemical Looping Combustion Program Plan Project Portfolio Project Information POSTED January 27, 2015 - Funding Opportunity Announcement DE-FOA-...

183

PARAMETRIC STUDY OF SUBMICRON PARTICULATES FROM PULVERIZED COAL COMBUSTION  

E-Print Network [OSTI]

D. , Trace Element Chemistry of Coal during Combustion andthe Emissions from Coal-Fired Plants. Prog. Energy Combust.Combustion of Pulverized Coal, Lawrence Berkeley Laboratory

Pennucci, J.

2014-01-01T23:59:59.000Z

184

Fuel Effects on Mixing-Controlled Combustion Strategies for High...  

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

Fuel Effects on Mixing-Controlled Combustion Strategies for High-Efficiency Clean-Combustion Engines Fuel Effects on Mixing-Controlled Combustion Strategies for High-Efficiency...

185

The Effects of Ethanol/Gasoline Blends on Advanced Combustion Strategies in Internal Combustion Engines.  

E-Print Network [OSTI]

??This dissertation presents the effects of blending ethanol with gasoline on advanced combustion strategies in internal combustion engines. The unique chemical, physical and thermal properties… (more)

Fatouraie, Mohammad

2014-01-01T23:59:59.000Z

186

Jet plume injection and combustion system for internal combustion engines  

DOE Patents [OSTI]

An improved combustion system for an internal combustion engine is disclosed wherein a rich air/fuel mixture is furnished at high pressure to one or more jet plume generator cavities adjacent to a cylinder and then injected through one or more orifices from the cavities into the head space of the cylinder to form one or more turbulent jet plumes in the head space of the cylinder prior to ignition of the rich air/fuel mixture in the cavity of the jet plume generator. The portion of the rich air/fuel mixture remaining in the cavity of the generator is then ignited to provide a secondary jet, comprising incomplete combustion products which are injected into the cylinder to initiate combustion in the already formed turbulent jet plume. Formation of the turbulent jet plume in the head space of the cylinder prior to ignition has been found to yield a higher maximum combustion pressure in the cylinder, as well as shortening the time period to attain such a maximum pressure.

Oppenheim, Antoni K. (Kensington, CA); Maxson, James A. (Berkeley, CA); Hensinger, David M. (Albany, CA)

1993-01-01T23:59:59.000Z

187

Combustion Byproducts Recycling Consortium  

SciTech Connect (OSTI)

The Combustion Byproducts Recycling Consortium (CBRC) program was developed as a focused program to remove and/or minimize the barriers for effective management of over 123 million tons of coal combustion byproducts (CCBs) annually generated in the USA. At the time of launching the CBRC in 1998, about 25% of CCBs were beneficially utilized while the remaining was disposed in on-site or off-site landfills. During the ten (10) year tenure of CBRC (1998-2008), after a critical review, 52 projects were funded nationwide. By region, the East, Midwest, and West had 21, 18, and 13 projects funded, respectively. Almost all projects were cooperative projects involving industry, government, and academia. The CBRC projects, to a large extent, successfully addressed the problems of large-scale utilization of CCBs. A few projects, such as the two Eastern Region projects that addressed the use of fly ash in foundry applications, might be thought of as a somewhat smaller application in comparison to construction and agricultural uses, but as a novel niche use, they set the stage to draw interest that fly ash substitution for Portland cement might not attract. With consideration of the large increase in flue gas desulfurization (FGD) gypsum in response to EPA regulations, agricultural uses of FGD gypsum hold promise for large-scale uses of a product currently directed to the (currently stagnant) home construction market. Outstanding achievements of the program are: (1) The CBRC successfully enhanced professional expertise in the area of CCBs throughout the nation. The enhanced capacity continues to provide technology and information transfer expertise to industry and regulatory agencies. (2) Several technologies were developed that can be used immediately. These include: (a) Use of CCBs for road base and sub-base applications; (b) full-depth, in situ stabilization of gravel roads or highway/pavement construction recycled materials; and (c) fired bricks containing up to 30%-40% F-fly ash. Some developed technologies have similar potential in the longer term. (3) Laboratory studies have been completed that indicate that much higher amounts of fly ash could be added in cement-concrete applications under some circumstances. This could significantly increase use of fly ash in cement-concrete applications. (4) A study of the long-term environmental effects of structural fills in a surface mine in Indiana was completed. This study has provided much sought after data for permitting large-volume management options in both beneficial as well as non-beneficial use settings. (5) The impact of CBRC on CCBs utilization trends is difficult to quantify. However it is fair to say that the CBRC program had a significant positive impact on increased utilization of CCBs in every region of the USA. Today, the overall utilization of CCBs is over 43%. (6) CBRC-developed knowledge base led to a large number of other projects completed with support from other sources of funding. (7) CBRC research has also had a large impact on CCBs management across the globe. Information transfer activities and visitors from leading coal producing countries such as South Africa, Australia, England, India, China, Poland, Czech Republic and Japan are truly noteworthy. (8) Overall, the CBRC has been a truly successful, cooperative research program. It has brought together researchers, industry, government, and regulators to deal with a major problem facing the USA and other coal producing countries in the world.

Paul Ziemkiewicz; Tamara Vandivort; Debra Pflughoeft-Hassett; Y. Paul Chugh; James Hower

2008-08-31T23:59:59.000Z

188

Turbulent Combustion in SDF Explosions  

SciTech Connect (OSTI)

A heterogeneous continuum model is proposed to describe the dispersion and combustion of an aluminum particle cloud in an explosion. It combines the gas-dynamic conservation laws for the gas phase with a continuum model for the dispersed phase, as formulated by Nigmatulin. Inter-phase mass, momentum and energy exchange are prescribed by phenomenological models. It incorporates a combustion model based on the mass conservation laws for fuel, air and products; source/sink terms are treated in the fast-chemistry limit appropriate for such gasdynamic fields, along with a model for mass transfer from the particle phase to the gas. The model takes into account both the afterburning of the detonation products of the C-4 booster with air, and the combustion of the Al particles with air. The model equations were integrated by high-order Godunov schemes for both the gas and particle phases. Numerical simulations of the explosion fields from 1.5-g Shock-Dispersed-Fuel (SDF) charge in a 6.6 liter calorimeter were used to validate the combustion model. Then the model was applied to 10-kg Al-SDF explosions in a an unconfined height-of-burst explosion. Computed pressure histories are compared with measured waveforms. Differences are caused by physical-chemical kinetic effects of particle combustion which induce ignition delays in the initial reactive blast wave and quenching of reactions at late times. Current simulations give initial insights into such modeling issues.

Kuhl, A L; Bell, J B; Beckner, V E

2009-11-12T23:59:59.000Z

189

HCCI Combustion: Analysis and Experiments  

SciTech Connect (OSTI)

Homogeneous charge compression ignition (HCCI) is a new combustion technology that may develop as an alternative to diesel engines with high efficiency and low NOx and particulate matter emissions. This paper describes the HCCI research activities being currently pursued at Lawrence Livermore National Laboratory and at the University of California Berkeley. Current activities include analysis as well as experimental work. On analysis, we have developed two powerful tools: a single zone model and a multi-zone model. The single zone model has proven very successful in predicting start of combustion and providing reasonable estimates for peak cylinder pressure, indicated efficiency and NOX emissions. This model is being applied to develop detailed engine performance maps and control strategies, and to analyze the problem of engine startability. The multi-zone model is capable of very accurate predictions of the combustion process, including HC and CO emissions. The multi-zone model h as applicability to the optimization of combustion chamber geometry and operating conditions to achieve controlled combustion at high efficiency and low emissions. On experimental work, we have done a thorough evaluation of operating conditions in a 4-cylinder Volkswagen TDI engine. The engine has been operated over a wide range of conditions by adjusting the intake temperature and the fuel flow rate. Satisfactory operation has been obtained over a wide range of operating conditions. Cylinder-to-cylinder variations play an important role in limiting maximum power, and should be controlled to achieve satisfactory performance.

Salvador M. Aceves; Daniel L. Flowers; Joel Martinez-Frias; J. Ray Smith; Robert Dibble; Michael Au; James Girard

2001-05-14T23:59:59.000Z

190

U.S. DEPARTMENT OF ENERGY - NETL CATEGORICAL EXCLUSION (CX) DESIGNATION FORM  

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

xxxx xxxx University of Texas El Paso FE Sequestration Division 2010 Bruce W. Lani December 1,2009-November 30,2012 University of Texas El Paso, El Paso, TX Investigation on Flame Characteristics and Burner Operability Issues of Oxy-Fuel Combustion Laboratory evaluation in existing facility to investigate oxy-fuel flame characteristics and assess their impact on the operability of oxy-fuel combustion systems Laboratory testing in existing fa Bruce W. Lani Digitally signed by Bruce W. Lani DN: cn=Bruce W. Lani, o=USDOE-NETL, ou=Sequestration Division, email=lani@netl.doe.gov, c=US Date: 2009.11.07 10:20:47 -05'00' 12 07 2009 john ganz Digitally signed by john ganz DN: cn=john ganz, o=NETL- DOE, ou=140 OPFC, email=john.ganz@netl.doe.gov, c=US Date: 2009.12.08 14:19:04

191

Major research topics in combustion  

SciTech Connect (OSTI)

The Institute for Computer Applications in Science and Engineering (ICASE) and NASA Langley Research Center (LaRC) hosted a workshop on October 2--4, 1989 to discuss some combustion problems of technological interest to LaRC and to foster interaction with the academic community in these research areas. The topics chosen for this purpose were flame structure, flame holding/extinction, chemical kinetics, turbulence-kinetics interaction, transition to detonation, and reacting free shear layers. This document contains the papers and edited versions of general discussions on these topics. The lead paper set the stage for the meeting by discussing the status and issues of supersonic combustion relevant to the scramjet engine. Experts were then called upon to review the current knowledge in the aforementioned areas, to focus on how this knowledge can be extended and applied to high-speed combustion, and to suggest future directions of research in these areas.

Hussaini, M.Y.; Kumar, A.; Voigt, R.G. (eds.)

1992-01-01T23:59:59.000Z

192

Natural Ores as Oxygen Carriers in Chemical Looping Combustion  

Science Journals Connector (OSTI)

Natural Ores as Oxygen Carriers in Chemical Looping Combustion ... Chemical looping combustion (CLC) is a combustion technology that utilizes oxygen from oxygen carriers (OC), such as metal oxides, instead of air to combust fuels. ...

Hanjing Tian; Ranjani Siriwardane; Thomas Simonyi; James Poston

2013-01-02T23:59:59.000Z

193

Combustion heater for oil shale  

DOE Patents [OSTI]

A combustion heater for oil shale heats particles of spent oil shale containing unburned char by burning the char. A delayed fall is produced by flowing the shale particles down through a stack of downwardly sloped overlapping baffles alternately extending from opposite sides of a vertical column. The delayed fall and flow reversal occurring in passing from each baffle to the next increase the residence time and increase the contact of the oil shale particles with combustion supporting gas flowed across the column to heat the shale to about 650 to 700/sup 0/C for use as a process heat source.

Mallon, R.; Walton, O.; Lewis, A.E.; Braun, R.

1983-09-21T23:59:59.000Z

194

Combustion heater for oil shale  

DOE Patents [OSTI]

A combustion heater for oil shale heats particles of spent oil shale containing unburned char by burning the char. A delayed fall is produced by flowing the shale particles down through a stack of downwardly sloped overlapping baffles alternately extending from opposite sides of a vertical column. The delayed fall and flow reversal occurring in passing from each baffle to the next increase the residence time and increase the contact of the oil shale particles with combustion supporting gas flowed across the column to heat the shale to about 650.degree.-700.degree. C. for use as a process heat source.

Mallon, Richard G. (Livermore, CA); Walton, Otis R. (Livermore, CA); Lewis, Arthur E. (Los Altos, CA); Braun, Robert L. (Livermore, CA)

1985-01-01T23:59:59.000Z

195

Chemical kinetics and combustion modeling  

SciTech Connect (OSTI)

The goal of this program is to gain qualitative insight into how pollutants are formed in combustion systems and to develop quantitative mathematical models to predict their formation rates. The approach is an integrated one, combining low-pressure flame experiments, chemical kinetics modeling, theory, and kinetics experiments to gain as clear a picture as possible of the process in question. These efforts are focused on problems involved with the nitrogen chemistry of combustion systems and on the formation of soot and PAH in flames.

Miller, J.A. [Sandia National Laboratories, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

196

Combustion synthesis method and products  

DOE Patents [OSTI]

Disclosed is a method of producing dense refractory products, comprising: (a) obtaining a quantity of exoergic material in powder form capable of sustaining a combustion synthesis reaction; (b) removing absorbed water vapor therefrom; (c) cold-pressing said material into a formed body; (d) plasma spraying said formed body with a molten exoergic material to form a coat thereon; and (e) igniting said exoergic coated formed body under an inert gas atmosphere and pressure to produce self-sustained combustion synthesis. Also disclosed are products produced by the method.

Holt, J.B.; Kelly, M.

1993-03-30T23:59:59.000Z

197

Combustion synthesis method and products  

DOE Patents [OSTI]

Disclosed is a method of producing dense refractory products, comprising: (a) obtaining a quantity of exoergic material in powder form capable of sustaining a combustion synthesis reaction; (b) removing absorbed water vapor therefrom; (c) cold-pressing said material into a formed body; (d) plasma spraying said formed body with a molten exoergic material to form a coat thereon; and (e) igniting said exoergic coated formed body under an inert gas atmosphere and pressure to produce self-sustained combustion synthesis. Also disclosed are products produced by the method.

Holt, J. Birch (San Jose, CA); Kelly, Michael (West Alexandria, OH)

1993-01-01T23:59:59.000Z

198

Engine Combustion Network Experimental Data  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Maintained by the Engine Combustion Department of Sandia National Laboratories, data currently available on the website includes reacting and non-reacting sprays in a constant-volume chamber at conditions typical of diesel combustion. The data are useful for model development and validation because of the well-defined boundary conditions and the wide range of conditions employed. A search utility displays data based on experimental conditions such as ambient temperature, ambient density, injection pressure, nozzle size, fuel, etc. Experiment-related visualizations are also available. The search utility for experimental data is located at http://public.ca.sandia.gov/ecn/cvdata/frameset.html (Specialized Interface)

199

Transonic Combustion Inc | Open Energy Information  

Open Energy Info (EERE)

Transonic Combustion Inc Transonic Combustion Inc Jump to: navigation, search Name Transonic Combustion, Inc. Place Camarillo, California Zip CA 93012 Sector Efficiency, Renewable Energy Product Transonic Combustion, Inc. is a US based research & development company focused on developing ultra-high efficiency automotive engines that run on gasoline and bio-renewable flex fuels. References Transonic Combustion, Inc.[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Transonic Combustion, Inc. is a company located in Camarillo, California . References ↑ "Transonic Combustion, Inc." Retrieved from "http://en.openei.org/w/index.php?title=Transonic_Combustion_Inc&oldid=352376

200

Biomass Combustion: Carbon Capture and Storage  

Science Journals Connector (OSTI)

This chapter deals with the capture and storage of carbon dioxide produced by the combustion of biomass. Since biomass combustion is potentially carbon neutral, this technique could provide a method of reducing t...

Jenny M. Jones; Amanda R. Lea-Langton…

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Coal Characterization in Relation to Coal Combustion  

Science Journals Connector (OSTI)

Most coals are used worldwide for combustion today. Generally all kinds of coals are applicable for combustion. The major methods of burning are fixed bed firing, fluidized bed firing and suspension firing. Th...

Harald Jüntgen

1987-01-01T23:59:59.000Z

202

Practical Use of Coal Combustion Research  

Science Journals Connector (OSTI)

Laboratory measurements of coal rapid pyrolysis char yield and char reactivity, together with a simple model of pulverized coal combustion, have been used to predict coal combustion efficiency in utility boile...

P. T. Roberts; C. Morley

1987-01-01T23:59:59.000Z

203

Emissions and Heat Transfer in Combustion Systems  

Science Journals Connector (OSTI)

A variety of combustion systems that employ turbulent diffusion combustion have been major sources of air pollutants such as NOx, particulates and hydrocarbons in spite of their high thermal efficiency compare...

Y. Daisho

1993-01-01T23:59:59.000Z

204

Simulation of lean premixed turbulent combustion  

E-Print Network [OSTI]

combustion systems that can burn fuels such as hydrogen or syngas.syngas, which is obtained from coal gasi?cation. E?ective utilization of these fuels requires combustion

2008-01-01T23:59:59.000Z

205

Combustion of Solid Biomass: Classification of Fuels  

Science Journals Connector (OSTI)

The combustion of solid biomass and the classification of these fuels are considered. Firstly the different methods of combustion appliances and plants are outlined from a ... view. The forms and types of solid biomass

Jenny M. Jones; Amanda R. Lea-Langton…

2014-01-01T23:59:59.000Z

206

Volatile Organic Compounds — Emissions from Biomass Combustion  

Science Journals Connector (OSTI)

The emissions of Volatile Organic Compounds (VOC) from biomass combustion have been investigated. VOC contribute both to ... 0.5–10 MW. A variety of biomass fuel types and combustion equipment was covered. The su...

Lennart Gustavsson; Mats-Lennart Karlsson

1993-01-01T23:59:59.000Z

207

Fuel Modification t Facilitate Future Combustion Regimes? | Department...  

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

Modification t Facilitate Future Combustion Regimes? Fuel Modification t Facilitate Future Combustion Regimes? 2005 Diesel Engine Emissions Reduction (DEER) Conference...

208

Modeling of HCCI and PCCI Combustion Processes  

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

combustion timing control - Startup - Fuel air ratio measurement and control - Low Power Density - Hydrocarbon and CO emissions Approach: Fundamental and...

209

Oxy-combustion Boiler Material Development  

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

Oxy-combustion Boiler Material Oxy-combustion Boiler Material Development Background In an oxy-combustion system, combustion air (79 percent nitrogen, 21 percent oxygen) is replaced by oxygen and recycled flue gas (carbon dioxide [CO 2 ] and water), eliminating nitrogen in the flue gas stream. When applied to an existing boiler, the flue gas recirculation rate is adjusted to enable the boiler to maintain its original air-fired heat absorption performance, eliminating the need to derate the boiler

210

Polymer combustion: effects of flame emissivity  

Science Journals Connector (OSTI)

...gas phase. Polymer combustion chemistry is modelled...investigating polymer combustion it has proven advantageous...properties and treat the heat flux from the ignition...luminous flames from hydrocarbon fuels, it is common...A (1999) Polymer combustion: effects of flame emissivity...

1999-01-01T23:59:59.000Z

211

Fundamental Study of Single Biomass Particle Combustion  

E-Print Network [OSTI]

Fundamental Study of Single Biomass Particle Combustion Maryam Momeni #12;Fundamental Study of Single Biomass Particle Combustion Maryam Momeni Dissertation submitted to the Faculty of Engineering Fundamental Study of Single Biomass Particle Combustion This thesis is a comprehensive study of single biomass

Berning, Torsten

212

Method of combustion for dual fuel engine  

DOE Patents [OSTI]

Apparatus and a method of introducing a primary fuel, which may be a coal water slurry, and a high combustion auxiliary fuel, which may be a conventional diesel oil, into an internal combustion diesel engine comprises detecting the load conditions of the engine, determining the amount of time prior to the top dead center position of the piston to inject the main fuel into the combustion chamber, and determining the relationship of the timing of the injection of the auxiliary fuel into the combustion chamber to achieve a predetermined specific fuel consumption, a predetermined combustion efficiency, and a predetermined peak cylinder firing pressure. 19 figures.

Hsu, B.D.; Confer, G.L.; Zujing Shen; Hapeman, M.J.; Flynn, P.L.

1993-12-21T23:59:59.000Z

213

Method of combustion for dual fuel engine  

DOE Patents [OSTI]

Apparatus and a method of introducing a primary fuel, which may be a coal water slutty, and a high combustion auxiliary fuel, which may be a conventional diesel oil, into an internal combustion diesel engine comprises detecting the load conditions of the engine, determining the amount of time prior to the top dead center position of the piston to inject the main fuel into the combustion chamber, and determining the relationship of the timing of the injection of the auxiliary fuel into the combustion chamber to achieve a predetermined specific fuel consumption, a predetermined combustion efficiency, and a predetermined peak cylinder firing pressure.

Hsu, Bertrand D. (Erie, PA); Confer, Gregory L. (Erie, PA); Shen, Zujing (Erie, PA); Hapeman, Martin J. (Edinboro, PA); Flynn, Paul L. (Fairview, PA)

1993-12-21T23:59:59.000Z

214

Modeling of Laser-Induced Metal Combustion  

SciTech Connect (OSTI)

Experiments involving the interaction of a high-power laser beam with metal targets demonstrate that combustion plays an important role. This process depends on reactions within an oxide layer, together with oxygenation and removal of this layer by the wind. We present an analytical model of laser-induced combustion. The model predicts the threshold for initiation of combustion, the growth of the combustion layer with time, and the threshold for self-supported combustion. Solutions are compared with detailed numerical modeling as benchmarked by laboratory experiments.

Boley, C D; Rubenchik, A M

2008-02-20T23:59:59.000Z

215

Measurement and simulation of swirling coal combustion  

Science Journals Connector (OSTI)

Particle image velocimetry (PIV), thermocouples and flue gas analyzer are used to study swirling coal combustion and NO formation under different secondary-air ratios. Eulerian–Lagrangian large-eddy simulation (LES) using the Smagorinsky–Lilly sub-grid scale stress model, presumed-PDF fast chemistry and eddy-break-up (EBU) gas combustion models, particle devolatilization and particle combustion models, are simultaneously used to simulate swirling coal combustion. Statistical LES results are validated by measurement results. Instantaneous LES results show that the coherent structures for swirling coal combustion are stronger than those for swirling gas combustion. Particles are shown to concentrate along the periphery of the coherent structures. Combustion flame is located in the high vorticity and high particle concentration zones. Measurement shows that secondary-air ratios have little effect on final NO formation at the exit of the combustor.

Liyuan Hu; Lixing Zhou; Yonghao Luo; Caisong Xu

2013-01-01T23:59:59.000Z

216

Combustion synthesis continuous flow reactor  

DOE Patents [OSTI]

The present invention is a reactor for combustion synthesis of inorganic powders. The reactor includes a reaction vessel having a length and a first end and a second end. The reaction vessel further has a solution inlet and a carrier gas inlet. The reactor further has a heater for heating both the solution and the carrier gas. In a preferred embodiment, the reaction vessel is heated and the solution is in contact with the heated reaction vessel. It is further preferred that the reaction vessel be cylindrical and that the carrier gas is introduced tangentially into the reaction vessel so that the solution flows helically along the interior wall of the reaction vessel. As the solution evaporates and combustion produces inorganic material powder, the carrier gas entrains the powder and carries it out of the reactor.

Maupin, Gary D. (Richland, WA); Chick, Lawrence A. (West Richland, WA); Kurosky, Randal P. (Maple Valley, WA)

1998-01-01T23:59:59.000Z

217

Homogeneous catalysts in hypersonic combustion  

SciTech Connect (OSTI)

Density and residence time both become unfavorably small for efficient combustion of hydrogen fuel in ramjet propulsion in air at high altitude and hypersonic speed. Raising the density and increasing the transit time of the air through the engine necessitates stronger contraction of the air flow area. This enhances the kinetic and thermodynamic tendency of H/sub 2/O to form completely, accompanied only by N/sub 2/ and any excess H/sub 2/(or O/sub 2/). The by-products to be avoided are the energetically expensive fragment species H and/or O atoms and OH radicals, and residual (2H/sub 2/ plus O/sub 2/). However, excessive area contraction raises air temperature and consequent combustion-product temperature by adiabatic compression. This counteracts and ultimately overwhelms the thermodynamic benefit by which higher density favors the triatomic product, H/sub 2/O, over its monatomic and diatomic alternatives. For static pressures in the neighborhood of 1 atm, static temperature must be kept or brought below ca. 2400 K for acceptable stability of H/sub 2/O. Another measure, whose requisite chemistry we address here, is to extract propulsive work from the combustion products early in the expansion. The objective is to lower the static temperature of the combustion stream enough for H/sub 2/O to become adequately stable before the exhaust flow is massively expanded and its composition ''frozen.'' We proceed to address this mechanism and its kinetics, and then examine prospects for enhancing its rate by homogeneous catalysts. 9 refs.

Harradine, D.M.; Lyman, J.L.; Oldenborg, R.C.; Pack, R.T.; Schott, G.L.

1989-01-01T23:59:59.000Z

218

Chemical Looping Air Separation Unit and Methods of Use  

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

Looping Air Separation Unit and Methods of Use Looping Air Separation Unit and Methods of Use Contact NETL Technology Transfer Group techtransfer@netl.doe.gov October 2012 Opportunity Research is currently active on the patent-pending technology "Chemical Looping Air Separation Unit and Methods of Use" that combines the best attributes of chemical looping and oxy-fuel combustion technologies. Following patent approval, the technology will be available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology Laboratory. Significance * Combines chemical looping and oxy-fuel technologies * Separates oxygen from air at high efficiencies * Removes CO

219

Final Report to Jupiter Oxygen Corporation on CRADA Phase 1 Activities, January 1, 2004, through June 30, 2005  

SciTech Connect (OSTI)

In January of 2004, a Cooperative Research and Development Agreement was signed with the Jupiter Oxygen Corporation; its term extends from January 2004 to January 1, 2009. The statement of work is attached as Appendix A. Under Phase I of this agreement, ARC was to provide technical expertise to develop computer models of existing power plants relative to retrofitting with oxy-fuel combustion; help design experiments to verify models and analyze data from experiments; help produce designs at larger scales; help design a new technology oxy-fuel power plant; and co-author technical papers on this work for presentation at appropriate conferences.

Summers, Cathy A.; Oryshchyn, Danylo B.; Ochs, Thomas L.; Turner, Paul C.

2005-06-30T23:59:59.000Z

220

Characteristics of biomass in flameless combustion: A review  

Science Journals Connector (OSTI)

Abstract The demands of energy and pollutant emissions reduction have motivated the combustion researchers to work on combustion improvement. Flameless combustion or high temperature air combustion has many features such as flame stability, low pollutant emission and uniform profiles of temperature compared to the other modes of combustion. Combustion of solid fuels likes biomass and wastes in flameless combustion conditions has not been investigated as comprehensive as combustion of gaseous fuels. The aim of using biomass in combustion is to reduce the pollutant emissions and to decrease the rate of fossil fuel consumption. In this review, combustion characteristics of biomass in flameless combustion are explained. The paper summarizes the research on the mass loss, ignition time, and \\{NOx\\} emissions during biomass flameless combustion. These summaries show that biomass under flameless combustion gives low pollutant emissions, low mass loss and it decreases the ignition time.

A.A.A. Abuelnuor; M.A. Wahid; Seyed Ehsan Hosseini; A. Saat; Khalid M. Saqr; Hani H. Sait; M. Osman

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

CX-000458: Categorical Exclusion Determination  

Broader source: Energy.gov [DOE]

Investigation on Flame Characteristics and Burner Operability Issues of Oxy-Fuel CombustionCX(s) Applied: B3.6Date: 12/07/2009Location(s): El Paso, TexasOffice(s): Fossil Energy, National Energy Technology Laboratory

222

NETL- Severe Environment Corrosion Erosion Facility  

SciTech Connect (OSTI)

NETL's Severe Environment Corrosion Erosion Facility in Albany studies how new and old materials will stand up to new operating conditions. Work done in the lab supports NETL's oxy-fuel combustion oxidation work, refractory materials stability work, and the fuels program, in particular the hydrogen membrane materials stability work, to determine how best to upgrade existing power plants.

None

2013-09-12T23:59:59.000Z

223

Coal for the future. Proceedings of the 33rd international technical conference on coal utilization and fuel systems  

SciTech Connect (OSTI)

Topics covered include oxy-fuel technology, modelling and simulations, low NOx technology, gasification technology, pre-utilization beneficiation of coal, advanced energy conversion systems, mercury emissions control, improving power plant efficiency and reducing emissions, biomass and wastes, coal to liquids, post-combustion CO{sub 2} capture, multi emission controls, advanced materials, advanced controls, and international highlights.

Sakkestad, B.A. (ed.)

2008-07-01T23:59:59.000Z

224

NETL- Severe Environment Corrosion Erosion Facility  

ScienceCinema (OSTI)

NETL's Severe Environment Corrosion Erosion Facility in Albany studies how new and old materials will stand up to new operating conditions. Work done in the lab supports NETL's oxy-fuel combustion oxidation work, refractory materials stability work, and the fuels program, in particular the hydrogen membrane materials stability work, to determine how best to upgrade existing power plants.

None

2014-06-16T23:59:59.000Z

225

Sandia Combustion Research Program: Annual report, 1986  

SciTech Connect (OSTI)

This report presents research results of the past year, divided thematically into some ten categories. Publications and presentations arising from this work are included in the appendix. Our highlighted accomplishment of the year is the announcement of the discovery and demonstration of the RAPRENOx process. This new mechanism for the elimination of nitrogen oxides from essentially all kinds of combustion exhausts shows promise for commercialization, and may eventually make a significant contribution to our nation's ability to control smog and acid rain. The sections of this volume describe the facility's laser and computer system, laser diagnostics of flames, combustion chemistry, reacting flows, liquid and solid propellant combustion, mathematical models of combustion, high-temperature material interfaces, studies of engine/furnace combustion, coal combustion, and the means of encouraging technology transfer. 182 refs., 170 figs., 12 tabs.

Not Available

1986-01-01T23:59:59.000Z

226

NETL: IEP – Post-Combustion CO2 Emissions Control - Oxy-Combustion Boiler  

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

Oxy-Combustion Boiler Material Development Oxy-Combustion Boiler Material Development Project No.: DE-NT0005262 CLICK ON IMAGE TO ENLARGE Foster Wheeler Oxy-combustion CFD Graphic The objectives of this Foster Wheeler Corporation-managed program are to assess the corrosion characteristics of oxy-combustion relative to air-fired combustion; identify the corrosion mechanisms involved; and determine the effects of oxy-combustion on conventional boiler tube materials, conventional protective coatings, and alternative materials and coatings when operating with high to low sulfur coals. The program involves the prediction of oxy-combustion gas compositions by computational fluid dynamic calculations, exposure of coupons of boiler materials and coverings coated with coal ash deposit to simulated oxy-combustion gases in electric

227

Estimating heat of combustion for waste materials  

SciTech Connect (OSTI)

Describes a method of estimating the heat of combustion of hydrocarbon waste (containing S,N,Q,C1) in various physical forms (vapor, liquid, solid, or mixtures) when the composition of the waste stream is known or can be estimated. Presents an equation for predicting the heat of combustion of hydrocarbons containing some sulfur. Shows how the method is convenient for estimating the heat of combustion of a waste profile as shown in a sample calculation.

Chang, Y.C.

1982-11-01T23:59:59.000Z

228

Supersonic combustion studies using a multivariate quadrature based method for combustion modeling  

E-Print Network [OSTI]

of predictive models for supersonic combustion is a critical step in design and development of scramjet engines

Raman, Venkat

229

Researchers create successful predictions of combustion reaction...  

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

chemical reactions that take place during the combustion process, said Sandia's Ahren Jasper, the study's lead author. As they determine and understand the speeds and outcomes of...

230

combustion index | netl.doe.gov  

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

in electricity cost. Advanced Combustion Research Overview Experience with steam boilers has provided information on existing boiler alloys, but limited data is available at...

231

Optimization of Advanced Diesel Engine Combustion Strategies  

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

B, extending combustion duration Location B with dummy plug installed Location A with optics installed fiber to FTIR common rail injector common rail fuel spray Location B with...

232

Chemical Kinetic Models for Advanced Engine Combustion  

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

barriers to increased engine efficiency and decreased emissions by allowing optimization of fuels with advanced engine combustion 6 LLNL-PRES-652979 2014 DOE Merit Review...

233

Oxygen-Enriched Combustion | Department of Energy  

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

tip sheet discusses how an increase in oxygen in combustion air can reduce the energy loss in the exhaust gases and increase process heating system efficiency. PROCESS HEATING...

234

Vehicle Technologies Office: Advanced Combustion Strategies ...  

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

element of LTC - is achieved by controlling the timing of the autoignition and rate of heat release. This process works to eliminate excessive combustion rates that can cause...

235

Advanced Combustion Concepts - Enabling Systems and Solutions...  

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

Fuel efficiency as key market driver Stringent emission requirements System cost of advanced combustion Targets 30% fuel efficiency improvement SULEV emissions...

236

Laser in situ monitoring of combustion processes  

Science Journals Connector (OSTI)

Several examples of laser in situ monitoring of combustion processes are presented. Using a frequency modulated 13CO2 waveguide laser, in situ concentrations of...

Arnold, A; Becker, H; Hemberger, R; Hentschel, W; Ketterle, W; Kollner, M; Meienburg, W; Monkhouse, P; Neckel, H; Schafer, M; Schindler, K P; Sick, V; Suntz, R; Wolfrum, J

1990-01-01T23:59:59.000Z

237

Supersonic Jet Sampling for Combustion Diagnostics  

Science Journals Connector (OSTI)

The purpose of this note is to describe a novel application of supersonic molecular beam spectrometry to the study of combustion processes in piston engines. In this technique,...

Whitten, W B

1986-01-01T23:59:59.000Z

238

Advanced Control Methodology for Biomass Combustion.  

E-Print Network [OSTI]

??This thesis presents a feasibility study for a low cost sensor-based combustion control system using a predictive chemical kinetic model that captures efficiencies and pollution… (more)

Bjornsson, Stefan

2014-01-01T23:59:59.000Z

239

Partially Premixed Combustion | Department of Energy  

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

that enables PPC to reach the market deer11andersson.pdf More Documents & Publications Combustion Model for Engine Concept Development Path to High Efficiency Gasoline Engine...

240

Research Teams - Combustion Energy Frontier Research Center  

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

Research Teams Research Teams Associates Greg Smith, Senior Research Chemist, SRI International Jeffrey A. Sutton, Assistant Professor, Ohio State Univeristy Combustion Energy...

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Chemistry and Transport - Combustion Energy Frontier Research...  

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

Chemistry and Transport Chemistry and Transport The overall goal of the flame chemistry working group is to obtain fundamental combustion and emission properties of low and high...

242

Integrated Nozzle Flow, Spray, Combustion, & Emission Modeling...  

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

Combustion, and Emission Modeling Using KH-ACT Primary Breakup Model & Detailed Chemistry Sibendu Som, Douglas E. Longman Engine and Emissions Group (Energy Systems Division)...

243

Chemistry: Mechanism and Experiment - Combustion Energy Frontier...  

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

Chemistry: Mechanism and Experiment Chemistry: Mechanism and Experiment The Mechanism and Experiment DWG uses an array of advanced experimental apparatus to probe the combustion...

244

Theoretical studies of combustion dynamics  

SciTech Connect (OSTI)

The basic objectives of this research program are to develop and apply theoretical techniques to fundamental dynamical processes of importance in gas-phase combustion. There are two major areas currently supported by this grant. One is reactive scattering of diatom-diatom systems, and the other is the dynamics of complex formation and decay based on L{sup 2} methods. In all of these studies, the authors focus on systems that are of interest experimentally, and for which potential energy surfaces based, at least in part, on ab initio calculations are available.

Bowman, J.M. [Emory Univ., Atlanta, GA (United States)

1993-12-01T23:59:59.000Z

245

Circulating fluidised-bed combustion  

SciTech Connect (OSTI)

Steam generators with circulating fluidized-bed combustion systems (CFBC) are characterized by a high degree of environmental comparability and a wide acceptance for FBC boiler plants involving a wide fuel spectrum which ranges from dried brown coal to high-ash coal and low-volatile bituminous coal as well as wood waste and bark. These plants incorporate a variety of CFBC systems. The choice in favor of different system options was not motivated by the inherent fuel properties but has evolved from the progressive advancement in power station FBC technology. The article elucidates several FBC system variants.

Rettemeier, W.; von der Kammer, G. (Steinmueller (L.u.C.) GmbH, Gummersbach (Germany, F.R.))

1990-01-01T23:59:59.000Z

246

Chemical looping combustion of coal in interconnected fluidized beds  

Science Journals Connector (OSTI)

Chemical looping combustion is the indirect combustion by use of oxygen carrier. It can...2...capture in power generating processes. In this paper, chemical looping combustion of coal in interconnected fluidized ...

LaiHong Shen; Min Zheng; Jun Xiao; Hui Zhang…

2007-04-01T23:59:59.000Z

247

Fuel reforming for scramjet thermal management and combustion optimization  

E-Print Network [OSTI]

Fuel reforming for scramjet thermal management and combustion optimization E. DANIAU* , M. BOUCHEZ in a Scramjet combustion chamber. Another critical point is that mixing and combustion should be sufficiently

Paris-Sud XI, Université de

248

Internal combustion engine intake valve  

SciTech Connect (OSTI)

In a inlet valve for use in an internal combustion engine in which the valve has a stem and a head, the head having, when seated, a first side positioned within a combustion chamber of an engine block and a second, opposite, side attached to the stem, the second side including that piston of the head forming the seat with the engine block when the valve is in a seated position, and first side including that portion of the head from the seat toward the chamber when the valve is in the seated position, and the engine including means for moving the valve from the closed position to an open position to allow a fuel mixture to enter the chamber, the improvement in the valve comprising: an extension ridge from the first side, positioned in alignment with the periphery of the valve head, the ridge forming with the seat a single, continuous, smooth outer surface along the periphery thereof for reducing the coefficient of drag of the fuel entering the chamber around the valve head when the valve is in the open position.

Mosler, W.B.

1988-10-25T23:59:59.000Z

249

Method and system for controlled combustion engines  

DOE Patents [OSTI]

A system for controlling combustion in internal combustion engines of both the Diesel or Otto type, which relies on establishing fluid dynamic conditions and structures wherein fuel and air are entrained, mixed and caused to be ignited in the interior of a multiplicity of eddies, and where these structures are caused to sequentially fill the headspace of the cylinders.

Oppenheim, A. K. (Berkeley, CA)

1990-01-01T23:59:59.000Z

250

The Cool Flame Combustion of Ethanol  

Science Journals Connector (OSTI)

...research-article The Cool Flame Combustion of Ethanol J. Brown C. F. H. Tipper The kinetics...products of the cool flame combustion of ethanol between about 280 and 330 C have been...much less for a 1 : 2 than for a 1 : 1 ethanol/oxygen mixture at constant T and varied...

1969-01-01T23:59:59.000Z

251

Numerical modelling of MILD combustion for coal  

Science Journals Connector (OSTI)

Emissions of nitrogen oxides from coal combustion are a major environmental problem because they have been shown to contribute to the formation of acid rain and photochemical smog. Moderate and Intensive Low oxygen Dilution (MILD) combustion is a promising technology for decreasing pollutant emissions and improving combustion efficiency. A combination of air preheating and fuel dilution with combustion products of low oxygen concentration are the main features of this technique. In the MILD combustion mode, preheated air and fuel are gradually mixed with large amounts of recirculated exhaust gas. The objective of the present work is to investigate the capability of present fuel NO mechanisms for pulverised coal combustion to predict the observed nitrogen oxide levels in MILD combustion mode. For this purpose, knowledge of the fate of coal nitrogen during the combustion process is vital. The interaction between turbulence and chemistry is modelled by an advanced Eddy Dissipation Concept (EDC). The NOx model is used to predict NO profiles that are compared to measurements obtained from semi-industrial scale experiments.

Ju Pyo Kim; U. Schnell; G. Scheffknecht; A.C. Benim

2007-01-01T23:59:59.000Z

252

Redeeming features of in situ combustion  

SciTech Connect (OSTI)

In situ combustion remains the most tantalizing enhanced oil recovery method. It has been tested extensively - in over 150 field tests - in both heavy and light oil reservoirs. What we have learned from this experience is that in situ combustion works under most conditions, but the nature of the problems is such that it is seldom profitable. Also, looking at many previous in situ combustion tests, steam injection, and even waterflooding, would have been a better choice. Yet in situ combustion has unique features not found in any other EOR method. These must be weighed against its shortcomings to evaluate a potential application. This paper discusses the redeeming features of in situ combustion, in particular the reservoir conditions under which in situ combustion may be superior to other EOR methods are outlined. All variations of in situ combustion - forward, reverse, wet, dry - as well as combinations with other EOR methods are considered. The conclusions is that in situ combustion still has a place, and its future application would depend on research on certain crucial aspects of the process.

Farouq Ali, S.M. [Univ. of Alberta, Edmonton (Canada)

1995-02-01T23:59:59.000Z

253

NETL- High-Pressure Combustion Research Facility  

SciTech Connect (OSTI)

NETL's High-Pressure Combustion Facility is a unique resource within the National Laboratories system. It provides the test capabilities needed to evaluate new combustion concepts for high-pressure, high-temperature hydrogen and natural gas turbines. These concepts will be critical for the next generation of ultra clean, ultra efficient power systems.

None

2013-07-08T23:59:59.000Z

254

Generating Resources Combined Cycle Combustion Turbine  

E-Print Network [OSTI]

turbine (s) Heat recovery steam generator (s) - HRSG with or without duct firing Natural gas supply11/17/2014 1 Generating Resources Combined Cycle Combustion Turbine Utility Scale Solar PV Steven doing recently around two key supply-side resource technologies 1. Combined Cycle Combustion Turbine

255

Coal slurry combustion and technology. Volume 2  

SciTech Connect (OSTI)

Volume II contains papers presented at the following sessions of the Coal Slurry Combustion and Technology Symposium: (1) bench-scale testing; (2) pilot testing; (3) combustion; and (4) rheology and characterization. Thirty-three papers have been processed for inclusion in the Energy Data Base. (ATT)

Not Available

1983-01-01T23:59:59.000Z

256

NETL- High-Pressure Combustion Research Facility  

ScienceCinema (OSTI)

NETL's High-Pressure Combustion Facility is a unique resource within the National Laboratories system. It provides the test capabilities needed to evaluate new combustion concepts for high-pressure, high-temperature hydrogen and natural gas turbines. These concepts will be critical for the next generation of ultra clean, ultra efficient power systems.

None

2014-06-26T23:59:59.000Z

257

Pulse Combustion Characteristics of Various Gaseous Fuels  

Science Journals Connector (OSTI)

Pulse combustion performance of fuels with low and high heating values is also compared. ... Selected gaseous fuels such as low molecular weight hydrocarbons, high molecular weight hydrocarbons, biofuels, and mixed fuels are tested for pulse combustion, and their operational properties are presented and compared. ... Heat transfer data for several exptl. ...

Wu Zhonghua; Arun S. Mujumdar

2008-02-06T23:59:59.000Z

258

Combustion Modeling for Diesel Engine Control Design  

E-Print Network [OSTI]

Combustion Modeling for Diesel Engine Control Design Von der Fakult¨at f¨ur Maschinenwesen der Combustion Modeling for Diesel Engine Control Design WICHTIG: D 82 überprüfen !!! #12;Bibliographic research stays at General Motors R&D in Warren, MI, USA, possible. Furthermore, I would like thank Tom

Peters, Norbert

259

Boiler Combustion Control and Monitoring System  

Broader source: Energy.gov [DOE]

Efficiency of existing boilers can be improved in three ways; replacement with new boilers, replacement of the burner, or installation of a combustion control system. While installation of a new boiler or replacement of the burner can lead to the greatest efficiency gains, the higher costs associated with these measures typically leads to longer payback periods than combustion control systems.

260

Collaborative Combustion Research with BES | Department of Energy  

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

Combustion Research with BES Collaborative Combustion Research with BES 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer...

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Overview of Sonex Combustion Systems (SCS) for DI Engines | Department...  

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

Sonex Combustion Systems (SCS) for DI Engines Overview of Sonex Combustion Systems (SCS) for DI Engines The SCS system has undergone computational and experimental verification and...

262

Sandia National Laboratories: Low--Temperature Combustion Enables...  

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

ECFacilitiesCRFLow--Temperature Combustion Enables Cleaner, More Efficient Engines Low--Temperature Combustion Enables Cleaner, More Efficient Engines Assessing the Economic...

263

Evaluation of High Efficiency Clean Combustion (HECC) Strategies...  

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

Combustion (HECC) Strategies for Meeting Future Emissions Regulations in Light-Duty Engines Evaluation of High Efficiency Clean Combustion (HECC) Strategies for Meeting Future...

264

2008 DOE Annual Merit Review Advanced Combustion Engines and...  

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

Advanced Combustion Engines and Fuels R&DTechnology Integration Plenary Session Overview 2008 DOE Annual Merit Review Advanced Combustion Engines and Fuels R&DTechnology...

265

High-Efficiency Clean Combustion Design for Compression Ignition...  

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

High-Efficiency Clean Combustion Design for Compression Ignition Engines High-Efficiency Clean Combustion Design for Compression Ignition Engines Presentation given at DEER 2006,...

266

Complete Fuel Combustion for Diesel Engines Resulting in Greatly...  

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

Complete Fuel Combustion for Diesel Engines Resulting in Greatly Reduced Emissions and Improved Fuel Efficiency Complete Fuel Combustion for Diesel Engines Resulting in Greatly...

267

Syngas Enhanced High Efficiency Low Temperature Combustion for...  

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

Enhanced High Efficiency Low Temperature Combustion for Clean Diesel Engines Syngas Enhanced High Efficiency Low Temperature Combustion for Clean Diesel Engines A significant...

268

Non-Petroleum-Based Fuel Effects on Advanced Combustion | Department...  

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

Non-Petroleum-Based Fuel Effects on Advanced Combustion Non-Petroleum-Based Fuel Effects on Advanced Combustion 2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit...

269

Catalyst for Improving the Combustion Efficiency of Petroleum...  

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

for Improving the Combustion Efficiency of Petroleum Fuels in Diesel Engines Catalyst for Improving the Combustion Efficiency of Petroleum Fuels in Diesel Engines 2005 Diesel...

270

World's Largest Post-Combustion Carbon Capture Project Begins...  

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

World's Largest Post-Combustion Carbon Capture Project Begins Construction World's Largest Post-Combustion Carbon Capture Project Begins Construction July 15, 2014 - 9:55am Addthis...

271

The Role of Advanced Combustion in Improving Thermal Efficiency  

Broader source: Energy.gov [DOE]

Combustion plays an important role in enabling high thermal efficiencies. Technologies that deliver short combustion duration and low soot emissions are needed.

272

Low-Temperature Diesel Combustion Cross-Cut Research | Department...  

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

Low-Temperature Diesel Combustion A Conceptual Model for Partially PremixedLow-Temperature Diesel Combustion Based onIn-Cylinder Laser Diagnostics and Chemical Kinetics Modeling...

273

Enabling High Efficiency Clean Combustion with Micro-Variable...  

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

of variable orifice fuel injector are described that will extend the operation maps of early PCCI combustion and enable dual-mode combustion over full operating maps....

274

Low-Temperature Diesel Combustion Cross-Cut Research | Department...  

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

Low-Temperature Diesel Combustion Cross-Cut Research Low-Temperature Diesel Combustion Cross-Cut Research 2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review...

275

Development of Fuel-Flexible Combustion Systems Utilizing Opportunity...  

Office of Environmental Management (EM)

Fuel-Flexible Combustion Systems Utilizing Opportunity Fuels in Gas Turbines - Fact Sheet, May 2014 Development of Fuel-Flexible Combustion Systems Utilizing Opportunity Fuels in...

276

Oscillatory Flame Response in Acoustically Coupled Fuel Droplet Combustion  

E-Print Network [OSTI]

and volumetric heats of combustion in biofuels render themVaporization [kJ/kg] Heat of Combustion [kJ/kg] †Estimated

Sevilla Esparza, Cristhian Israel

2013-01-01T23:59:59.000Z

277

2014 Annual Merit Review Results Report - Advanced Combustion...  

Energy Savers [EERE]

Advanced Combustion Engine Technologies 2014 Annual Merit Review Results Report - Advanced Combustion Engine Technologies Merit review of DOE Vehicle Technologies research...

278

Advanced Combustion Technology to Enable High Efficiency Clean...  

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

Combustion System + Air Handling Air Handling + Sensors + Calibration Low P, High Flow Rate EGR + VVA - Simulated Robustness Advanced Combustion Concepts - Simulated 0.0...

279

2.61 Internal Combustion Engines, Spring 2004  

E-Print Network [OSTI]

Fundamentals of how the design and operation of internal combustion engines affect their performance, operation, fuel requirements, and environmental impact. Study of fluid flow, thermodynamics, combustion, heat transfer ...

Heywood, John B.

280

Computationally Efficient Modeling of High-Efficiency Clean Combustion Engines  

Broader source: Energy.gov [DOE]

Document:  ace012_flowers_2013_o.pdfTechnology Area: Advanced Combustion; Combustion and Emissions ControlPresenter: Dan FlowersPresenting Organization: Lawrence Livermore National Laboratory (LLNL...

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Haraldrud Municipal Solid Waste Combustion Plant in Oslo.  

E-Print Network [OSTI]

??This thesis has studied Haraldrud MSW combustion process. Haraldrud is a realcombustion plant burning waste for citizens of Oslo. A thoroughly description ofthe combustion process… (more)

Gudim, Simen Johan

2011-01-01T23:59:59.000Z

282

Combustion Turbine CHP System for Food Processing Industry -...  

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

Combustion Turbine CHP System for Food Processing Industry - Presentation by Frito-Lay North America, June 2011 Combustion Turbine CHP System for Food Processing Industry -...

283

Oxygen-Enriched Combustion for Military Diesel Engine Generators...  

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

Combustion for Military Diesel Engine Generators Oxygen-Enriched Combustion for Military Diesel Engine Generators Substantial increases in brake power and considerably lower peak...

284

Modeling Combustion Control for High Power Diesel Mode Switching...  

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

Combustion Control for High Power Diesel Mode Switching Modeling Combustion Control for High Power Diesel Mode Switching Poster presentation given at the 16th Directions in...

285

High Efficiency Clean Combustion for Heavy-Duty Engine  

Broader source: Energy.gov [DOE]

Explore advancements in engine combustion systems using high-efficiency clean combustion (HECC) techniques to minimize engine-out emissions while optimizing fuel economy.

286

Low Temperature Combustion and Diesel Emission Reduction Research...  

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

Low Temperature Combustion and Diesel Emission Reduction Research Low Temperature Combustion and Diesel Emission Reduction Research Presentation given at DEER 2006, August 20-24,...

287

Dilute Clean Diesel Combustion Achieves Low Emissions and High...  

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

Dilute Clean Diesel Combustion Achieves Low Emissions and High Efficiency While Avoiding Control Problems of HCCI Dilute Clean Diesel Combustion Achieves Low Emissions and High...

288

Unregulated Emissions from High-Efficiency Clean Combustion Modes...  

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

Unregulated Emissions from High-Efficiency Clean Combustion Modes - ORNL-FEERC Unregulated Emissions from High-Efficiency Clean Combustion Modes - ORNL-FEERC Poster presentation at...

289

Low-Temperature Automotive Diesel Combustion | Department of...  

Energy Savers [EERE]

Diesel Combustion Low-Temperature Automotive Diesel Combustion 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

290

State Grid Biomass Fuel and Combustion Technology Laboratory...  

Open Energy Info (EERE)

Combustion Technology Laboratory Jump to: navigation, search Name: State Grid Biomass Fuel and Combustion Technology Laboratory Place: Beijing Municipality, China Sector: Biomass...

291

Fuel Effects on Ignition and Their Impact on Advanced Combustion...  

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

Ignition and Their Impact on Advanced Combustion Engines Fuel Effects on Ignition and Their Impact on Advanced Combustion Engines Presentation given at DEER 2006, August 20-24,...

292

Combustion Exhaust Gas Heat to Power Using Thermoelectric Engines...  

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

Combustion Exhaust Gas Heat to Power Using Thermoelectric Engines Combustion Exhaust Gas Heat to Power Using Thermoelectric Engines Discusses a novel TEG which utilizes a...

293

Hydrogen Assisted Diesel Combustion in a Common Rail Turbodiesel...  

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

Assisted Diesel Combustion in a Common Rail Turbodiesel Engine P-3 Hydrogen Assisted Diesel Combustion in a Common Rail Turbodiesel Engine P-3 Gregory Lilik, Jos Martn...

294

Hydrogen Assisted Diesel Combustion in a Common Rail Turbodiesel...  

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

Assisted Diesel Combustion in a Common Rail Turbodiesel Engine Hydrogen Assisted Diesel Combustion in a Common Rail Turbodiesel Engine This study measured the effects of hydrogen...

295

Heavy-Duty Low Temperature Combustion Development Activities...  

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

soot emissions - Cylinder pressure and rise rate limits - Low load combustion stabilityignition Robust combustion control - Cylinder-to-cylinder variability - Ambient...

296

2011 2nd Annual CEFRC Conference - Combustion Energy Frontier...  

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

chemistry and diagnostics (HansenYang) Chemical kinetics and transport of combustion processes (Wang) H2O number density measurements in an RCM and plasma combustion using...

297

Modeling of High Efficiency Clean Combustion Engines | Department...  

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

merit08flowers.pdf More Documents & Publications Modeling of HCCI and PCCI Combustion Processes Numerical Modeling of HCCI Combustion Improving alternative fuel utilization:...

298

Modeling of HCCI and PCCI Combustion Processes | Department of...  

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

HCCI and PCCI Combustion Processes Modeling of HCCI and PCCI Combustion Processes 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters...

299

Factors Affecting HCCI Combustion Phasing for Fuels with Single...  

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

Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry Factors Affecting HCCI Combustion Phasing for Fuels with Single- and Dual-Stage Chemistry 2004...

300

CFD Combustion Modeling with Conditional Moment Closure using Tabulated Chemistry  

Broader source: Energy.gov [DOE]

A method is presented that allows for efficient conditional moment closure combustion simulations through the use of a progress variable based parameterization of the combustion chemistry.

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

CFD Combustion Modeling with Conditional Moment Closure using...  

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

Combustion Modeling with Conditional Moment Closure using Tabulated Chemistry CFD Combustion Modeling with Conditional Moment Closure using Tabulated Chemistry A method is...

302

Accurate Predictions of Fuel Effects on Combustion and Emissions...  

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

on Combustion and Emissions in Engines Using CFD Simulations With Detailed Fuel Chemistry Accurate Predictions of Fuel Effects on Combustion and Emissions in Engines Using...

303

Numerical Modeling of PCCI Combustion | Department of Energy  

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

Modeling of HCCI and PCCI Combustion Processes Numerical Modeling of HCCI Combustion Bridging the Gap between Fundamental Physics and Chemistry and Applied Models for HCCI Engines...

304

Fuel Effects on Advanced Combustion Engines | Department of Energy  

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

More Documents & Publications Fuel Effects on Advanced Combustion: Heavy-Duty Optical-Engine Research Greenpower Trap Mufflerl System Low-Temperature Diesel Combustion...

305

High Efficiency Clean Combustion Engine Designs for Gasoline...  

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

High Efficiency Clean Combustion Engine Designs for Gasoline and Diesel Engines High Efficiency Clean Combustion Engine Designs for Gasoline and Diesel Engines 2009 DOE Hydrogen...

306

Light-Duty Diesel Combustion | Department of Energy  

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

Light-Duty Diesel Combustion Light-Duty Diesel Combustion 2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting...

307

Light Duty Efficient Clean Combustion | Department of Energy  

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

Light Duty Efficient Clean Combustion Light Duty Efficient Clean Combustion 2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

308

Advanced Diesel Combustion with Low Hydrocarbon and Carbon Monoxide...  

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

Combustion with Low Hydrocarbon and Carbon Monoxide Emissions Advanced Diesel Combustion with Low Hydrocarbon and Carbon Monoxide Emissions Poster presented at the 16th Directions...

309

Dry low NOx combustion system with pre-mixed direct-injection secondary fuel nozzle  

DOE Patents [OSTI]

A combustion system includes a first combustion chamber and a second combustion chamber. The second combustion chamber is positioned downstream of the first combustion chamber. The combustion system also includes a pre-mixed, direct-injection secondary fuel nozzle. The pre-mixed, direct-injection secondary fuel nozzle extends through the first combustion chamber into the second combustion chamber.

Zuo, Baifang; Johnson, Thomas; Ziminsky, Willy; Khan, Abdul

2013-12-17T23:59:59.000Z

310
311

Steel project fact sheet: Steel reheating for further processing  

SciTech Connect (OSTI)

Steel reheating is an energy-intensive process requiring uniform temperature distribution within reheating furnaces. Historically, recuperators have ben used to preheat combustion air, thereby conserving energy. More recent innovations include oxygen enrichment and the use of regenerative burners, which provide higher preheat air temperatures than recuperators. These processes have limitations such as equipment deterioration, decreasing energy efficiency over time, high maintenance costs, and increased NO{sub x} emissions with increased air preheat temperature, unless special equipment is used. Praxair, Inc., supplier of oxygen and other industrial gases to the steel industry, proposes to introduce an innovative oxy-fuel burner technology (using 100% oxygen) to the steel reheating industry. Oxy-fuel combustion reduces or eliminates nitrogen in combustion air and substantially reduces waste heat carried out with flue gas. Based on technology currently used in the glass, hazardous waste, and aluminum industries, Praxair has developed and patented low temperature, oxy-fuel burners that can be used in high temperature industrial furnaces where temperature uniformity is critical and extremely low NO{sub x} emissions are desired. The technical goal of the project is to demonstrate the use of oxy-fuel burners in a slab reheat furnace while reducing energy consumption by 45% and NO{sub x} emissions by 90% within the converted furnace zones. Successful implementation of this technology also will eliminate the need to periodically replace recuperators and install NO{sub x} removal equipment.

NONE

1998-04-01T23:59:59.000Z

312

Argonne TTRDC - Engines - Combustion Visualization - emissions,  

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

Combustion Visualization Combustion Visualization Exploring Combustion Using Advanced Imaging Techniques In the photo, the GM diesel test cell is shown with vehicle exhaust aftertreatment hardware (diesel particulate filtration and diesel oxidation catalyst) along with other advanced technology-such as a variable geometry turbocharger, cooled exhaust gas recirculation and a common-rail fuel injection system. Fig. 1. The GM diesel test cell is shown with vehicle exhaust aftertreatment hardware (diesel particulate filtration and diesel oxidation catalyst) along with other advanced technology-such as a variable geometry turbocharger, cooled exhaust gas recirculation and a common-rail fuel injection system. Two-dimensional image of hydrogen combustion OH chemiluminescence. Fig. 2. Two-dimensional image of hydrogen combustion OH chemiluminescence.

313

Fine Particle Emissions from Combustion Systems  

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

Fine Particle Emissions from Combustion Systems Fine Particle Emissions from Combustion Systems Speaker(s): Allen Robinson Date: November 11, 2005 - 12:00pm Location: 90-3122 Combustion systems such as motor vehicles and power plants are major sources of fine particulate matter. This talk describes some of the changes in fine particle emissions that occur as exhaust from combustion systems mix with background air. This mixing cools and dilutes the exhaust which influences gas-particle partitioning of semi-volatile species, the aerosol size distribution, and the fine particle mass. Dilution sampling is used to characterize fine particle emissions from combustion systems because it simulates the rapid cooling and dilution that occur as exhaust mixes with the atmosphere. Results from dilution sampler

314

Advanced Combustion Technologies | Department of Energy  

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

Science & Innovation » Clean Coal » Advanced Combustion Science & Innovation » Clean Coal » Advanced Combustion Technologies Advanced Combustion Technologies Joe Yip, a researcher at FE's National Energy Technology Laboratory, uses laser-based Rayleigh light scattering to measure flame density and speed over a flat flame burner. Oxyfuel combustion, using oxygen in place of air with diluents such as steam or carbon dioxide, can reduce pollutant emissions in advanced power cycles using gas turbines. Photo courtesy of NETL Multimedia. Joe Yip, a researcher at FE's National Energy Technology Laboratory, uses laser-based Rayleigh light scattering to measure flame density and speed over a flat flame burner. Oxyfuel combustion, using oxygen in place of air with diluents such as steam or carbon dioxide, can reduce pollutant

315

Numerical modeling of in-flight characteristics of inconel 625 particles during high-velocity oxy-fuel thermal spraying  

Science Journals Connector (OSTI)

A computational fluid dynamics (CFD) model is developed to predict particle dynamic behavior in a high-velocity oxyfuel (HVOF) thermal spray gun in which premixed oxygen and propylene are ... 20 to 40 µm. At a pa...

S. Gu; D. G. McCartney; C. N. Eastwick; K. Simmons

2004-01-01T23:59:59.000Z

316

Axial cylinder internal combustion engine  

SciTech Connect (OSTI)

This patent describes improvement in a barrel type internal combustion engine including an engine block having axial-positioned cylinders with reciprocating pistons arranged in a circular pattern: a drive shaft concentrically positioned within the cylinder block having an offset portion extending outside the cylinder block; a wobble spider rotatably journaled to the offset portion; connecting rods for each cylinder connecting each piston to the wobble spider. The improvement comprising: a first sleeve bearing means supporting the drive shaft in the engine block in a cantilevered manner for radial loads; a second sleeve bearing means rotatably supporting the wobble spider on the offset portion of the drive shaft for radial loads; a first roller bearing means positioned between the offset portion of the drive shaft and the wobble spider carrying thrust loadings only; a second roller bearing means carrying thrust loads only reacting to the first roller bearing located on the opposite end of the driveshaft between the shaft and the engine block.

Gonzalez, C.

1992-03-10T23:59:59.000Z

317

Advances in pulverized coal combustion  

SciTech Connect (OSTI)

A combustion system has been developed to operate cost effectively in the difficult regulatory and economic climate of the 1980's. The system is designed to reduce auxiliary fuel oil comsumption by at least 30% while meeting all relevant emissions limits. This is achieved with the fewest components consistent with practical reliable design criteria. The Controlled Flow Split/Flame low NO/sub x/ burner, MBF pulverizer and Two-Stage ignition system are integrated into a mutually supporting system which is applicable to both new steam generators and, on a retrofit basis, to existing units. In the future, a pulverized coal ignition system will be available to eliminate fuel oil use within the boiler.

Vatsky, J.

1981-01-01T23:59:59.000Z

318

Vehicle Technologies Office: Advanced Combustion Engines  

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

Combustion Engines Combustion Engines Improving the efficiency of internal combustion engines is one of the most promising and cost-effective near- to mid-term approaches to increasing highway vehicles' fuel economy. The Vehicle Technologies Office's research and development activities address critical barriers to commercializing higher efficiency, very low emissions advanced internal combustion engines for passenger and commercial vehicles. This technology has great potential to reduce U.S. petroleum consumption, resulting in greater economic, environmental, and energy security. Already offering outstanding drivability and reliability to over 230 million passenger vehicles, internal combustion engines have the potential to become substantially more efficient. Initial results from laboratory engine tests indicate that passenger vehicle fuel economy can be improved by more than up to 50 percent, and some vehicle simulation models estimate potential improvements of up to 75 percent. Advanced combustion engines can utilize renewable fuels, and when combined with hybrid electric powertrains could have even further reductions in fuel consumption. As the EIA reference case forecasts that by 2035, more than 99 percent of light- and heavy-duty vehicles sold will still have internal combustion engines, the potential fuel savings is tremendous.

319

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

320

Gas turbine alternative fuels combustion characteristics  

SciTech Connect (OSTI)

An experimental investigation was conducted to obtain combustion performance and exhaust pollutant concentrations for specific synthetic hydrocarbon fuels. Baseline comparison fuels used were gasoline and diesel fuel number two. Testing was done over a range of fuel to air mass ratios, total mass flow rates, and input combustion air temperatures in a flame-tube-type gas turbine combustor. Test results were obtained in terms of released heat and combustion gas emission values. The results were comparable to those obtained with the base fuels with variations being obtained with changing operating conditions. The release of carbon particles during the tests was minimal. 22 refs., 12 figs., 2 tabs.

Rollbuhler, R.J.

1989-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

In Situ NMR Spectroscopy of Combustion  

Science Journals Connector (OSTI)

In situ nuclear magnetic resonance spectroscopy (NMR) of high-temperature reactions is of potential value for the investigation of catalytic combustion and other high-temperature applications of catalysts such as partial oxidation of hydrocarbons and steam reforming. ... Two-dimensional (2D) studies of gas exchange within different heat zones of the combustion process provide valuable insights into the gas-phase dynamics. ... This may be the case at the high combustion temperatures, but neither experimental nor theoretical xenon chemical shift data is available in current literature for temperatures above 1000 K. ...

Satyanarayana Anala; Galina E. Pavlovskaya; Prakash Pichumani; Todd J. Dieken; Michael D. Olsen; Thomas Meersmann

2003-10-07T23:59:59.000Z

322

Combustion in cracks of PBX 9501  

SciTech Connect (OSTI)

Recent experiments involving the combustion of PBX 9501 explosive under confined conditions reveal the importance of crack and flaws in reaction violence. Experiments on room temperature confined disks of pristine and thermally damaged PBX 9501 reveal that crack ignition depends on hot gases entering existing or pressure induced cracks rather than on energy release at the crack tip. PBX 9501 slot combustion experiments show that the reaction propagation rate in the slot does not depend on the external pressure. We have observed 1500 d s in long slots of highly-confined PBX 9501. We present experiments that examine the combustion of mechanically and thermally damaged samples of PBX 9501.

Berghout, H. L. (Henry L.); Son, S. F. (Steven F.); Bolme, C. A. (Cynthia A.); Hill, L. G. (Larry G.); Asay, B. W. (Blaine W.); Dickson, P. M. (Peter M.); Henson, B. F. (Bryan F.); Smilowitz, L. B. (Laura B.)

2002-01-01T23:59:59.000Z

323

Diesel knock noise from combustion phenomenon to perceived signals  

E-Print Network [OSTI]

Diesel knock noise from combustion phenomenon to perceived signals O. Sauvagea , A. Lauracb , M for reducing Diesel knock are modifications of engine parameters used for controlling combustion processes-acoustic properties, throught its noticeable combustion noise (also called "Diesel knock"). Combustion noise generated

Paris-Sud XI, Université de

324

Thermodynamic Analysis of Alternative Approaches to Chemical Looping Combustion  

Science Journals Connector (OSTI)

Thermodynamic Analysis of Alternative Approaches to Chemical Looping Combustion ... Because H2 and syngas have similar combustion irreversibilities, when reforming is done optimally (with TR close to 650 K), iso-octane can be combusted with the same efficiency as that of preheated, isothermal H2 combustion. ... A loop of chem. ...

V. Kalyana Chakravarthy; C. Stuart Daw; Josh A. Pihl

2011-01-19T23:59:59.000Z

325

US National Technical Meeting of the Combustion Institute  

E-Print Network [OSTI]

potential to enhance combustion performance in gas turbines and scramjet engines. Extensive efforts have

Ju, Yiguang

326

Robust Feedback Control of Combustion Instability with Modeling Uncertainty  

E-Print Network [OSTI]

to mod- ulate combustion processes in propulsion sys- tems has recently received extensive attention [1

Ray, Asok

327

Emission formation during wood log combustion in fireplaces â?? part I: volatile combustion stage  

Science Journals Connector (OSTI)

A CFD-based tool for the analysis of combustion and emissions in batch-fired wood log combustion is introduced. It consists of submodels for drying and pyrolysis of a wood log, for combustion of volatilised fuel and char, for radiative heat transfer, and for NO formation implemented in a commercial CFD-programme (Fluent) for turbulent flows. Comparing model predictions to experimental data in a test oven shows the applicability of the different submodels and combination of them.

M. Huttunen; J. Saastamoinen; P. Kilpinen; L. Kjaldman; H. Oravainen; S. Bostrom

2006-01-01T23:59:59.000Z

328

Biomass Combustion Systems Inc | Open Energy Information  

Open Energy Info (EERE)

Combustion Systems Inc Combustion Systems Inc Jump to: navigation, search Name Biomass Combustion Systems Inc Address 67 Millbrook St Place Worcester, Massachusetts Zip 01606 Sector Biomass Product Combustion systems for wood fuel Website http://www.biomasscombustion.c Coordinates 42.290195°, -71.799627° 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":42.290195,"lon":-71.799627,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

329

Chemical Looping for Combustion and Hydrogen Production  

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

ChemiCal looping for Combustion and ChemiCal looping for Combustion and hydrogen produCtion Objective The objective of this project is to determine the benefits of chemical looping technology used with coal to reduce CO 2 emissions. Background Chemical looping is a new method to convert coal or gasified coal to energy. In chemical looping, there is no direct contact between air and fuel. The chemical looping process utilizes oxygen from metal oxide oxygen carrier for fuel combustion, or for making hydrogen by "reducing" water. In combustion applications, the products of chemical looping are CO 2 and H 2 O. Thus, once the steam is condensed, a relatively pure stream of CO 2 is produced ready for sequestration. The production of a sequestration ready CO 2 stream does not require any additional separation units

330

Coal fuel slurry for internal combustion engines  

Science Journals Connector (OSTI)

A technoeconomic study of the production of coal-water fuel slurry for internal combustion engines and thermal power plants was performed. Based on the accumulated experimental data, it was found that, in the ...

N. I. Red’kina; G. S. Khodakov; E. G. Gorlov

2013-09-01T23:59:59.000Z

331

The Role of Volatiles in Coal Combustion  

Science Journals Connector (OSTI)

Our knowledge of the role of volatiles in coal combustion ranges at this time from the self-evident to the ambiguous. The clearest point on which all agree is that pyrolysis will occur during the total coal co...

Robert H. Essenhigh; Eric M. Suuberg

1987-01-01T23:59:59.000Z

332

Oil shale retorting and combustion system  

DOE Patents [OSTI]

The present invention is directed to the extraction of energy values from l shale containing considerable concentrations of calcium carbonate in an efficient manner. The volatiles are separated from the oil shale in a retorting zone of a fluidized bed where the temperature and the concentration of oxygen are maintained at sufficiently low levels so that the volatiles are extracted from the oil shale with minimal combustion of the volatiles and with minimal calcination of the calcium carbonate. These gaseous volatiles and the calcium carbonate flow from the retorting zone into a freeboard combustion zone where the volatiles are burned in the presence of excess air. In this zone the calcination of the calcium carbonate occurs but at the expense of less BTU's than would be required by the calcination reaction in the event both the retorting and combustion steps took place simultaneously. The heat values in the products of combustion are satisfactorily recovered in a suitable heat exchange system.

Pitrolo, Augustine A. (Fairmont, WV); Mei, Joseph S. (Morgantown, WV); Shang, Jerry Y. (Fairfax, VA)

1983-01-01T23:59:59.000Z

333

Coal Combustion By-Products (Maryland)  

Broader source: Energy.gov [DOE]

The Department of the Environment is responsible for regulating fugitive air emissions from the transportation of coal combustion by-products and the permissible beneficial uses of these by...

334

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

335

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

336

Virtual Design of Stirling Engine Combustion Chamber  

Science Journals Connector (OSTI)

The paper deals with the designing of a combustion chamber of the Stirling engine using the CFD approach. Virtual prototypes enabled ... . The presented results help to increase the Stirling engine efficiency tog...

Z. Kaplan; P. Novotný; V. Píšt?k

2010-01-01T23:59:59.000Z

337

Vortex driven flame dynamics and combustion instability  

E-Print Network [OSTI]

Combustion instability in premixed combustors mostly arises due to the coupling between heat release rate dynamics and system acoustics. It is crucial to understand the instability mechanisms to design reliable, high ...

Altay, Hurrem Murat

2005-01-01T23:59:59.000Z

338

State of Industrial Fluidized Bed Combustion  

E-Print Network [OSTI]

A new combustion technique has been developed in the last decade that permits the burning of low quality coal, lignite and other fuels, while maintaining stack emissions within State and Federal limits. Low quality fuels can be burned directly...

Mesko, J. E.

1982-01-01T23:59:59.000Z

339

Coal Combustion Products Extension Program  

SciTech Connect (OSTI)

This final project report presents the activities and accomplishments of the ''Coal Combustion Products Extension Program'' conducted at The Ohio State University from August 1, 2000 to June 30, 2005 to advance the beneficial uses of coal combustion products (CCPs) in highway and construction, mine reclamation, agricultural, and manufacturing sectors. The objective of this technology transfer/research program at The Ohio State University was to promote the increased use of Ohio CCPs (fly ash, FGD material, bottom ash, and boiler slag) in applications that are technically sound, environmentally benign, and commercially competitive. The project objective was accomplished by housing the CCP Extension Program within The Ohio State University College of Engineering with support from the university Extension Service and The Ohio State University Research Foundation. Dr. Tarunjit S. Butalia, an internationally reputed CCP expert and registered professional engineer, was the program coordinator. The program coordinator acted as liaison among CCP stakeholders in the state, produced information sheets, provided expertise in the field to those who desired it, sponsored and co-sponsored seminars, meetings, and speaking at these events, and generally worked to promote knowledge about the productive and proper application of CCPs as useful raw materials. The major accomplishments of the program were: (1) Increase in FGD material utilization rate from 8% in 1997 to more than 20% in 2005, and an increase in overall CCP utilization rate of 21% in 1997 to just under 30% in 2005 for the State of Ohio. (2) Recognition as a ''voice of trust'' among Ohio and national CCP stakeholders (particularly regulatory agencies). (3) Establishment of a national and international reputation, especially for the use of FGD materials and fly ash in construction applications. It is recommended that to increase Ohio's CCP utilization rate from 30% in 2005 to 40% by 2010, the CCP Extension Program be expanded at OSU, with support from state and federal agencies, utilities, trade groups, and the university, to focus on the following four specific areas of promise: (a) Expanding use in proven areas (such as use of fly ash in concrete); (b) Removing or reducing regulatory and perceptual barriers to use (by working in collaboration with regulatory agencies); (c) Developing new or under-used large-volume market applications (such as structural fills); and (d) Placing greater emphasis on FGD byproducts utilization.

Tarunjit S. Butalia; William E. Wolfe

2006-01-11T23:59:59.000Z

340

Fundamental Studies in Syngas Premixed Combustion Dynamics  

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

Studies Studies in Syngas Premixed Combustion Dynamics Ahmed F. Ghoniem, Anuradha M. Annaswamy, Raymond L. Speth, H. Murat Altay Massachusetts Institute of Technology SCIES Project 05-01-SR121 Project Awarded (08/01/2005, 36 Month Duration) Needs & Objectives Gas Turbine Needs Flexibility to operate with variable syngas compositions Ensure stable operation over a wide range of conditions Reduce emissions of CO and NO x Project Objectives Study experimentally lean premixed syngas combustion

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Oxy-combustion: Oxygen Transport Membrane Development  

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

combustion: Oxygen Transport combustion: Oxygen Transport Membrane Development Background The mission of the U.S. Department of Energy's (DOE) Existing Plants, Emissions & Capture (EPEC) Research & Development (R&D) Program is to develop innovative environmental control technologies to enable full use of the nation's vast coal reserves, while at the same time allowing the current fleet of coal-fired power plants to comply with existing and emerging environmental regulations. The EPEC R&D

342

Building America Expert Meeting: Combustion Safety  

SciTech Connect (OSTI)

This is a meeting overview of 'The Best Approach to Combustion Safety in a Direct Vent World', held June 28, 2012, in San Antonio, Texas. The objective of this Expert Meeting was to identify gaps and barriers that need to be addressed by future research, and to develop data-driven technical recommendations for code updates so that a common approach for combustion safety can be adopted by all members of the building energy efficiency and code communities.

Brand, L.

2013-03-01T23:59:59.000Z

343

Rapid Deployment of Rich Catalytic Combustion  

SciTech Connect (OSTI)

The overall objective of this research under the Turbines Program is the deployment of fuel flexible rich catalytic combustion technology into high-pressure ratio industrial gas turbines. The resulting combustion systems will provide fuel flexibility for gas turbines to burn coal derived synthesis gas or natural gas and achieve NO{sub x} emissions of 2 ppmvd or less (at 15 percent O{sub 2}), cost effectively. This advance will signify a major step towards environmentally friendly electric power generation and coal-based energy independence for the United States. Under Phase 1 of the Program, Pratt & Whitney (P&W) performed a system integration study of rich catalytic combustion in a small high-pressure ratio industrial gas turbine with a silo combustion system that is easily scalable to a larger multi-chamber gas turbine system. An implementation plan for this technology also was studied. The principal achievement of the Phase 1 effort was the sizing of the catalytic module in a manner which allowed a single reactor (rather than multiple reactors) to be used by the combustion system, a conclusion regarding the amount of air that should be allocated to the reaction zone to achieve low emissions, definition of a combustion staging strategy to achieve low emissions, and mechanical integration of a Ceramic Matrix Composite (CMC) combustor liner with the catalytic module.

Richard S. Tuthill

2004-06-10T23:59:59.000Z

344

Effect of Oxyfuel Combustion on Superheater Corrosion  

SciTech Connect (OSTI)

Combustion of coal in an oxygen environment (as opposed to air) will facilitate the sequestering of carbon dioxide by minimizing the amount of nitrogen in the exit gas stream. The presence of higher levels of certain gases associated with oxyfuel combustion (eg, CO2, SO2, and H2O) may impact the corrosion of waterwalls, superheaters, headers, reheaters, and other boiler components. Research is being conducted on bare and ash-embedded boiler tube materials in simulated oxyfuel- combustion and air-combustion environments at a superheater temperature of 675°C. Alloys were exposed at temperature to two different gaseous environments. Preliminary results show: (1) an increase in corrosion rate of bare K02707, K11547, K21590, K91560, K92460, S30409, S34700, and N06617 exposed to the oxyfuel combustion environment when compared to the air combustion environment; (2) an increase in corrosion rate of alloys K21590, K92460, S34700, and N06617, when embedded in ash in comparison to bare exposure; and (3) no effect of gaseous environment on alloy corrosion rate when embedded in ash.

Covino, B.S., Jr.; Matthes, S.A.; Bullard, S.J.

2008-03-16T23:59:59.000Z

345

Combustion kinetics and reaction pathways  

SciTech Connect (OSTI)

This project is focused on the fundamental chemistry of combustion. The overall objectives are to determine rate constants for elementary reactions and to elucidate the pathways of multichannel reactions. A multitechnique approach that features three independent experiments provides unique capabilities in performing reliable kinetic measurements over an exceptionally wide range in temperature, 300 to 2500 K. Recent kinetic work has focused on experimental studies and theoretical calculations of the methane dissociation system (CH{sub 4} + Ar {yields} CH{sub 3} + H + Ar and H + CH{sub 4} {yields} CH{sub 3} + H{sub 2}). Additionally, a discharge flow-photoionization mass spectrometer (DF-PIMS) experiment is used to determine branching fractions for multichannel reactions and to measure ionization thresholds of free radicals. Thus, these photoionization experiments generate data that are relevant to both reaction pathways studies (reaction dynamics) and fundamental thermochemical research. Two distinct advantages of performing PIMS with high intensity, tunable vacuum ultraviolet light at the National Synchrotron Light Source are high detection sensitivity and exceptional selectivity in monitoring radical species.

Klemm, R.B.; Sutherland, J.W. [Brookhaven National Laboratory, Upton, NY (United States)

1993-12-01T23:59:59.000Z

346

Reducible Oxide Based Oxygen Carriers for Chemical Looping Combustion and Partial Oxidation of Methane.  

E-Print Network [OSTI]

??Chemical looping combustion (CLC) is a novel combustion technology that offers a highly efficient route towards clean combustion of fuel with inherent CO2 capture. In… (more)

Bhavsar, Saurabh

2014-01-01T23:59:59.000Z

347

An In-Cylinder Imaging Survey of Low-Temperature, High-Efficiency Combustion Strategies  

Broader source: Energy.gov [DOE]

High speed imaging of in-cylinder spray and combustion luminosity of low temperature combustion strategies are contrasted to conventional gasoline and diesel engine combustion

348

Advanced High Efficiency Clean Diesel Combustion with Low Cost for Hybrid Engines  

Broader source: Energy.gov [DOE]

Clean, in-cylinder combustion can be enabled by a micro-variable circular orifice, dual mode PCCI, dew film combustion, and a novel combustion chamber design

349

Emissions of trace gases and aerosols during the open combustion of biomass in the laboratory  

E-Print Network [OSTI]

emissions during biomass combustion: Controlling factors andfrom smoldering combustion of biomass measured by open-pathduring the open combustion of biomass in the laboratory

McMeeking, Gavin R.

2009-01-01T23:59:59.000Z

350

Fuel Effects on Advanced Combustion: Heavy-Duty Optical-Engine...  

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

More Documents & Publications Fuel Effects on Advanced Combustion: Heavy-Duty Optical-Engine Research Fuels and Combustion Strategies for High-Efficiency Clean-Combustion...

351

Combustion Synthesis of Silicon Carbide 389 Combustion Synthesis of Silicon Carbide  

E-Print Network [OSTI]

Combustion Synthesis of Silicon Carbide 389 X Combustion Synthesis of Silicon Carbide Alexander S velocity and 17 #12;Properties and Applications of Silicon Carbide390 reaction rate throughout the mixture by graphite during SHS of carbides. Local reaction initiation is typically accomplished by hot tungsten wire

Mukasyan, Alexander

352

Utilization of Combustion?Driven Oscillations  

Science Journals Connector (OSTI)

The possible applications of combustion?driven oscillations fall into two categories. The first category includes applications that are related to the combustion process itself such as those concerned with the possibility of alterlog space heat?release rate combustion efficiency heat transfer to surfaces and agglomeration of solid or liquid products of combustion. A consideration of available experimental and theoreticalinformation indicates that none of these applications are too promising when compared with alternative methods of performing the same functions. The second category includes applications that use pulsatory phenomena to do a particular iob. Examples are the application of valveless pulse jets to (a) the propulsion of drones (b) helicopter blade?tip propulsion (c) cutting of Arctic ice and (d) inducing pressure rises in through?flow combustion systems. For one reason or another most of these ideas have been dropped. However the use of the pulsating?combustion process to supply both the air at a high flow velocity to a combustor and the products of combustion at a high velocity to a heat exchanger thereby making possible a compact self?contained unit appears to have great promise. One such unit of residential boiler size is already available. Although this unit is valved as was the V?1 conversion to a valveless unit appears possible. The development of industrial?sized units appears equally feasible. Apparently the development of such units is contingent upon (a) adequate understanding of how to design effective aerodynamic valves and (b) the collaboration of an inventor experimentalist analyst and financier on a specific program.

Abbott A. Putnam

1963-01-01T23:59:59.000Z

353

NETL: IEP – Post-Combustion CO2 Emissions Control - Oxy-Combustion  

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

IEP - Oxy-Combustion CO2 Emissions Control IEP - Oxy-Combustion CO2 Emissions Control Oxy-Combustion Technology Development for Industrial-Scale Boiler Applications Project No.: DE-NT0005290 Alstom oxy-combustion test facility Alstom oxy-combustion test facility. Alstom will develop an oxyfuel firing system design specifically for retrofit to tangential-fired (T-fired) boilers and provide information to address the technical gaps for commercial boiler design. Several oxyfuel system design concepts, such as internal flue gas recirculation and various oxygen injection schemes, will be evaluated for cost-effectiveness in satisfying furnace design conditions in a T-fired boiler. The evaluation will use an array of tools, including Alstom's proprietary models and design codes, along with 3-D computational fluid dynamics modeling. A

354

Federal Energy Management Program: FEMP Technology Brief: Boiler Combustion  

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

FEMP Technology FEMP Technology Brief: Boiler Combustion Control and Monitoring System to someone by E-mail Share Federal Energy Management Program: FEMP Technology Brief: Boiler Combustion Control and Monitoring System on Facebook Tweet about Federal Energy Management Program: FEMP Technology Brief: Boiler Combustion Control and Monitoring System on Twitter Bookmark Federal Energy Management Program: FEMP Technology Brief: Boiler Combustion Control and Monitoring System on Google Bookmark Federal Energy Management Program: FEMP Technology Brief: Boiler Combustion Control and Monitoring System on Delicious Rank Federal Energy Management Program: FEMP Technology Brief: Boiler Combustion Control and Monitoring System on Digg Find More places to share Federal Energy Management Program: FEMP

355

Flamelet model for pulverized coal combustion  

Science Journals Connector (OSTI)

Abstract A new flamelet model applicable to the simulation of pulverized coal combustion has been developed. First, a modeling approach that considers the coupling with both devolatilization and char combustion was adopted. We changed the fuel composition of the flamelet equation relative to the states of devolatilization and char combustion. In order to determine the fuel composition coming through the char combustion, all the gasified char was assumed to be converted into CO by the oxidation reaction. The validity of the developed flamelet model was examined in a simple two-dimensional pulverized coal jet field ignited by burnt co-flows. The accuracy of the model was evaluated by comparing its instantaneous distributions of temperature, CO2 mass fraction, and OH mass fraction with those of a detailed chemistry model. Good agreement was obtained in terms of the overall features of turbulent structures and combustion state, although the flamelet model showed slightly quicker ignition due to the transitional state in the ignition process being insufficiently reproducible.

Junya Watanabe; Kenji Yamamoto

2014-01-01T23:59:59.000Z

356

Reaction and diffusion in turbulent combustion  

SciTech Connect (OSTI)

The motivation for this project is the need to obtain a better quantitative understanding of the technologically-important phenomenon of turbulent combustion. In nearly all applications in which fuel is burned-for example, fossil-fuel power plants, furnaces, gas-turbines and internal-combustion engines-the combustion takes place in a turbulent flow. Designers continually demand more quantitative information about this phenomenon-in the form of turbulent combustion models-so that they can design equipment with increased efficiency and decreased environmental impact. For some time the PI has been developing a class of turbulent combustion models known as PDF methods. These methods have the important virtue that both convection and reaction can be treated without turbulence-modelling assumptions. However, a mixing model is required to account for the effects of molecular diffusion. Currently, the available mixing models are known to have some significant defects. The major motivation of the project is to seek a better understanding of molecular diffusion in turbulent reactive flows, and hence to develop a better mixing model.

Pope, S.B. [Mechanical and Aerospace Engineering, Ithaca, NY (United States)

1993-12-01T23:59:59.000Z

357

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

358

Descargue Datos de Ahorro de Combustible  

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

Descargue Datos de Ahorro de Combustible Descargue Datos de Ahorro de Combustible Los datos de ahorro de combustible son el resultado de las pruebas realizadas en el Laboratorio de Emisiones de Combustible y Vehículos de la Agencia Nacional de Protección del Medio Ambiente en Ann Arbor, Michigan y por fabricantes de automóviles, con la supervisión de la EPA. Archivo Descargable de Ahorro de Combustible Archivo* de la Guía de Ahorremos Gasolina Archivo 2014 No Disponible Archivo 2013 de la Guía de Ahorremos Gasolina 2013 Ícono de Adobe Acrobat Archivo 2012 de la Guía de Ahorremos Gasolina 2012 Ícono de Adobe Acrobat Archivo 2011 de la Guía de Ahorremos Gasolina 2011 Ícono de Adobe Acrobat Archivo 2010 de la Guía de Ahorremos Gasolina 2010 Ícono de Adobe Acrobat Archivo 2009 de la Guía de Ahorremos Gasolina 2009 Ícono de Adobe Acrobat

359

OXYGEN ENHANCED COMBUSTION FOR NOx CONTROL  

SciTech Connect (OSTI)

This quarterly technical progress report will summarize work accomplished for the Program through the second quarter July--September 2000 in the following task areas: Task 1-Oxygen Enhanced Combustion, Task 2-Oxygen Transport Membranes and Task 4-Program Management. The program is proceeding in accordance with the objectives for the first year. OTM tube characterization is well underway, the design and assembly of the high pressure permeation test facility is complete and the facility will be in full operation during the next quarter. Combustion testing has been initiated at both the University of Arizona and Praxair. Testing at the University of Arizona has experienced some delays; steps have been take to get the test work back on schedule. Completion of the first phase of the testing is expected in next quarter. Combustion modeling has been started at both REI and Praxair, preliminary results are expected in the next quarter.

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

2000-10-01T23:59:59.000Z

360

Understanding the thermodynamic inefficiencies in combustion processes  

Science Journals Connector (OSTI)

Abstract The thermodynamic inefficiencies associated with any energy conversion process are expressed by the exergy destruction and the exergy losses associated with the process. Combustion processes exhibit very high thermodynamic inefficiencies caused by chemical reaction, heat transfer, friction, and mixing. In this paper, we discuss how to estimate the thermodynamic inefficiencies resulting from each one of these sources. The thermodynamic evaluation can be conducted with the aid of either a conventional exergetic analysis or an advanced one. The latter allows estimation of the potential for improvement of the process being considered and demonstrates the interactions among the components of the system in which combustion takes place. The paper discusses how advanced exergy-based evaluations can be used to reduce the thermodynamic inefficiencies, costs, and environmental impacts associated with energy conversion systems including combustion processes.

George Tsatsaronis; Tatiana Morosuk; Daniela Koch; Max Sorgenfrei

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Premixed Combustion of Hydrogen Augmented Natural Gas  

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

Premixed Combustion of Hydrogen Premixed Combustion of Hydrogen Augmented Natural Gas * Lean premixed combustion * Effective for emission reduction with natural gas * High hydrogen flame speed requires care in premixer design for SGH fuels * UC Irvine study quantifies effectiveness of hydrogen augmentation strategy * Lean stability limit improves linearly with hydrogen augmentation * Emissions reduction can be achieved * Two OEM's and the California Energy Commission have used the results to help guide them on adapting to hydrogen fuel UC Irvine Scott Samuelsen / Vince McDonell Project 98-01-SR062 1200 1300 1400 1500 1600 1700 1800 1900 0 10 20 30 40 50 60 Hydrogen Volume in Main Fuel (%) Adiabatic Flame Temperature (K) P0(3/4) High Stability High Stability Low emission Low emission operational zone operational zone

362

Study of the potential valorization of metal contaminated Salix via phytoextraction by combustion  

E-Print Network [OSTI]

, different energy-recovery- techniques (incineration, combustion, gasification, pyrolysis, anaerobic

Paris-Sud XI, Université de

363

http://www.genie.uottawa.ca/~hallett/hallett.htm Combustion Research  

E-Print Network [OSTI]

Engineering Main themes: - solid fuel combustion/packed beds - liquid droplet combustion - biofuels (biomass, Mechanical Engineering #12;Liquid Droplet Combustion W. Hallett, Mechanical Engineering Recent Work - biomasshttp://www.genie.uottawa.ca/~hallett/hallett.htm Combustion Research W. Hallett, Mechanical

Hallett, William L.H.

364

Hydrothermal combustion of biofuels in supercritical water  

SciTech Connect (OSTI)

Supercritical water oxidation (SCWO) has long been recognized as a safe, clean and energy efficient method for destroying a wide range of organic materials and hazardous wastes. As SCWO systems operate at elevated pressure, all effluent streams are fully contained allowing efficient recovery of thermal energy using compact heat exchangers. Water vapor produced by the combustion efficiency, especially for fuels with increasing moisture content such as biomass. This paper compares the performance of a simple Rankine vapor power cycle which derives it`s heat input from (1) a hydrothermal combustion system, and (2) a conventionally-fired steam boiler. The study is based on a hypothetical cellulose-based organic fuel with a higher heating value of 7,000 BT/1bm (dry). For a constant organic feedrate of 100 tons/day (bone dry) mixed in 20:80 fuel/water ratio with water, the calculated net electric power output from the 31.93%. Whereas, for an organic feedrate of 100 tons/day (bone dry) with zero of 5,382 kW, at an overall thermal efficiency of 31.48%. The hydrothermal combustion power cycle is unaffected by free moisture in the fuel, and thereby uniquely well-suited for use in biomass power generation applications. The hydrothermal combustion process is exceptionally clean burning, and allows full control over carbon dioxide and SOx emissions. NOx levels are inherently ultra-low due to lower combustion temperatures. Hydrothermal combustion technology is ready for pilot-scale engineering development and demonstration.

McGuinness, T.G. [Summit Research Corporation, Sante Fe, NM (United States); Marentis, R. [Summit Research Corporation, Allentown, PA (United States)

1994-12-31T23:59:59.000Z

365

Argonne TTRDC - Engines - Home - combustion, compression ignition,  

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

* Combustion Visualization * Combustion Visualization * Compression-Ignition * Emissions Control * Fuel Injection and Sprays * Idling * Multi-Dimensional Modeling * Particulate Matter * Spark Ignition Green Racing GREET Hybrid Electric Vehicles Hydrogen & Fuel Cells Materials Modeling, Simulation & Software Plug-In Hybrid Electric Vehicles PSAT Smart Grid Student Competitions Technology Analysis Transportation Research and Analysis Computing Center Working With Argonne Contact TTRDC Engines Omnivorous engine tested by Thomas Wallner Thomas Wallner tests the omnivorous engine, a type of spark-ignition engine. Argonne's engine research is contributing to advances in technology that will impact the use of conventional and alternative fuels and the design of advanced technology vehicles. Compression Ignition

366

Building America Expert Meeting: Combustion Safety  

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

Meeting: Combustion Safety Meeting: Combustion Safety L. Brand Partnership for Advanced Residential Retrofit March 2013 NOTICE 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, subcontractors, or affiliated partners 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

367

Building America Expert Meeting: Combustion Safety  

Broader source: Energy.gov [DOE]

This expert meeting, The Best Approach to Combustion Safety in a Direct Vent World, was conducted by the Partnership for Advanced Residential Retrofit team on June 28, 2012, in San Antonio, TX. The objective of this Expert Meeting was to identify gaps and barriers that need to be addressed by future research, and to develop data-driven technical recommendations for code updates so that a common approach for combustion safety can be adopted by all members of the building energy efficiency and code communities.

368

Kinetic data base for combustion modeling  

SciTech Connect (OSTI)

The aim of this work is to develop a set of evaluated rate constants for use in the simulation of hydrocarbon combustion. The approach has been to begin with the small molecules and then introduce larger species with the various structural elements that can be found in all hydrocarbon fuels and decomposition products. Currently, the data base contains most of the species present in combustion systems with up to four carbon atoms. Thus, practically all the structural grouping found in aliphatic compounds have now been captured. The direction of future work is the addition of aromatic compounds to the data base.

Tsang, W.; Herron, J.T. [National Institute of Standards and Technology, Gaithersburg, MD (United States)

1993-12-01T23:59:59.000Z

369

Resonance ionization detection of combustion radicals  

SciTech Connect (OSTI)

Fundamental research on the combustion of halogenated organic compounds with emphasis on reaction pathways leading to the formation of chlorinated aromatic compounds and the development of continuous emission monitoring methods will assist in DOE efforts in the management and disposal of hazardous chemical wastes. Selective laser ionization techniques are used in this laboratory for the measurement of concentration profiles of radical intermediates in the combustion of chlorinated hydrocarbon flames. A new ultrasensitive detection technique, made possible with the advent of tunable VUV laser sources, enables the selective near-threshold photoionization of all radical intermediates in premixed hydrocarbon and chlorinated hydrocarbon flames.

Cool, T.A. [Cornell Univ., Ithaca, NY (United States)

1993-12-01T23:59:59.000Z

370

Past experiences with automotive external combustion engines  

SciTech Connect (OSTI)

GMR (General Motors Research Laboratories, now GM R and D Center) has a history of improving the internal combustion engine, especially as it relates to automotive use. During the quarter century from 1950--75, considerable effort was devoted to evaluating alternative powerplants based on thermodynamic cycles different from those on which the established spark-ignition and diesel engines are founded. Two of these, the steam engine and the Stirling engine, incorporated external combustion. Research on those two alternatives is reviewed. Both were judged to fall short of current needs for commercial success as prime movers for conventional automotive vehicles.

Amann, C.A.

1999-07-01T23:59:59.000Z

371

Evaluating the fluidized bed combustion options  

SciTech Connect (OSTI)

The proceedings from a conference on fluidized bed combustion are now available. The book discusses the immediate availability of atmospheric fluidized bed combustion technology as a practical, environmentally sound option for burning all grades of coal, wood, wood wastes, and biomass. The economics and technical fundamentals of atmospheric FBC are explained for the benefit of owners and managers of industrial boilers, boiler operators, architects/engineers, boiler manufacturers, and fuel suppliers. More than 15 FBC experts have contributed their expertise and experiences to the book.

Sheahan, R.T. (ed.)

1984-01-01T23:59:59.000Z

372

1 - Combustion processes of textile fibres  

Science Journals Connector (OSTI)

Abstract: This chapter reviews the current knowledge of the processes involved in the combustion behaviour of textiles and approaches to their flame retardant protection. Synthetic fibre-forming polymers, both thermoplastic and high temperature resistant, as well as naturally occurring fibre types are discussed. The combustion process is described with reference to the thermal stability, degradation and oxidative degradation of various individual polymer types. The significance of textile structure is considered with respect to the textile flammability. The mechanisms of the different flame retardant systems applied to various textiles are discussed as well as the more recent application of nano-composites. Finally, a prediction of potential future developments is presented.

D. Price; A.R. Horrocks

2013-01-01T23:59:59.000Z

373

Non-Petroleum Based Fuel Effects on Advanced Combustion (Agreement...  

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

Non-Petroleum Based Fuel Effects on Advanced Combustion (Agreement 13425) Non-Petroleum Based Fuel Effects on Advanced Combustion (Agreement 13425) Presentation from the U.S. DOE...

374

Conditions of realization of superwet in-situ combustion  

SciTech Connect (OSTI)

In in-situ combustion adding water to the air considerably improves the characteristics of the process: the combustible fuel concentration is reduced, the steam plateau ahead of the combustion front increases, less oxidizer is required to displace the oil, and the thermal wave has a higher propagation velocity. In wet combustion the temperature in the combustion zone reaches approx. 500/sup 0/C. In superwet combustion it depends on the reservoir pressure and may be 200-300/sup 0/C. It is not known in advance whether the heat of combustion will suffice to sustain the thermal wave, and if it does suffice, what will be the maximum values of the water-air ratio for the process. This paper attempts to construct a mathematical model of the superwet combustion process.

Bokserman, A.A.; Stepanov, V.P.

1985-07-01T23:59:59.000Z

375

A new type of self-organization in combustion  

Science Journals Connector (OSTI)

... a solid-phase gasless combustion3 which proceeds with the formation of a melt or a flameless gas3'4. ... gas3'4. Flameless combustion has recently been described for several tetrazole compounds5.

A. I. Lesnikovich; V. V. Sviridov; G. V. Printsev; O. A. Ivashkevich; P. N. Gaponik

1986-10-23T23:59:59.000Z

376

Large-Eddy Simulation of Swirling Pulverized-Coal Combustion  

Science Journals Connector (OSTI)

A Eulerian-Lagrangian large-eddy simulation (LES) with a Smagorinsky-Lilly sub-grid scale stress model, presumed-PDF fast chemistry and EBU gas combustion models, particle devolatilization and particle combustion

L. Y. Hu; L. X. Zhou; Y. H. Luo; C. S. Xu

2013-01-01T23:59:59.000Z

377

A Comparison of Combustion and Emissions of Diesel Fuels and...  

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

A Comparison of Combustion and Emissions of Diesel Fuels and Oxygenated Fuels in a Modern DI Diesel Engine A Comparison of Combustion and Emissions of Diesel Fuels and Oxygenated...

378

Advanced Combustion Systems Project Information | netl.doe.gov  

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

FC26-07NT43088 Recovery Act: Oxy-combustion: Oxygen Transport Membrane Development Praxair, Inc. Completed Projects FE0009686 High Efficiency Molten-Bed Oxy-Coal Combustion...

379

COMBUSTION RESEARCH PROGRAM. CHAPTER FROM ENERGY & ENVIRONMENT ANNUAL REPORT 1977  

E-Print Network [OSTI]

The pulverized coal has significant ash content, about 6%.of Ash and Trace Metals from Pulverized Coal Combustion P.of Ash and Trace Metals from Pulverized Coal Combustion P.

Authors, Various

2011-01-01T23:59:59.000Z

380

MILD combustion for hydrogen and syngas at elevated pressures  

Science Journals Connector (OSTI)

As gas recirculation constitutes a fundamental condition for the realization of MILD combustion, it is necessary to determine gas recirculation ratio before designing MILD combustor. MILD combustion model with ga...

Mingming Huang; Zhedian Zhang; Weiwei Shao; Yan Xiong…

2014-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Combustion of Low-Calorific Waste Biomass Syngas  

Science Journals Connector (OSTI)

The industrial combustion chamber designed for burning low-calorific syngas from gasification of waste biomass is presented. ... chips and turkey feathers the non-premixed turbulent combustion in the chamber is s...

Kamil Kwiatkowski; Marek Dudy?ski; Konrad Bajer

2013-12-01T23:59:59.000Z

382

The role played by self-inhibition in combustion processes  

Science Journals Connector (OSTI)

The absence of correlations between the heat of combustion of substances and substance combustion characteristics is shown to be caused by the special features of competition between reaction chain branching a...

V. V. Azatyan; I. A. Bolod’yan; Yu. N. Shebeko…

2006-04-01T23:59:59.000Z

383

Thermogravimetric analysis of co-combustion of biomass and biochar  

Science Journals Connector (OSTI)

The co-combustion of biomass and biochar was investigated by thermogravimetric analysis....R M...) for different blends were used to evaluate co-combustion features. As the biomass content increas...

Qiguo Yi; Fangjie Qi; Gong Cheng…

2013-06-01T23:59:59.000Z

384

The Inorganic Chemistry of Biomass Combustion: Problems and Solutions  

Science Journals Connector (OSTI)

High temperature molten products of the combustion of biomass present special problems related to fouling and ... performed calculations of the total inorganic chemistry of biomass combustion using a free energy ...

M. Blander

1997-01-01T23:59:59.000Z

385

Light-Duty Advanced Diesel Combustion Research | Department of...  

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

Light-Duty Advanced Diesel Combustion Research Light-Duty Advanced Diesel Combustion Research Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008...

386

Novel New Oxygen Carriers for Chemical Looping Combustion of Solid Fuels  

Science Journals Connector (OSTI)

Novel New Oxygen Carriers for Chemical Looping Combustion of Solid Fuels ... A loop of chem. ... Energy Combust. ...

Yueying Fan; Ranjani Siriwardane

2014-02-21T23:59:59.000Z

387

E-Print Network 3.0 - advanced wall-fired combustion Sample Search...  

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

Biomass and Animal Waste Combustion Energy Engine Emission Fuel Cells... Gasification Internal Combustion Engine Performance Pollutants Formation (NOx, Hg) and...

388

Using Parametrized Finite Combustion Stage Models to Characterize Combustion in Diesel Engines  

Science Journals Connector (OSTI)

Characterizing combustion in diesel engines is not only necessary when researching the instantaneous combustion phenomena but also when investigating the change of the combustion process under variable engine operating conditions. ... This project partly is financially supported by the Fundamental Research Funds for the Central Universities, Harbin Engineering University, China, HEUCF120307, and the International Science and Technology Cooperation Program of China. ... Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy (2011), 225 (3), 309-318 CODEN: PMAEET; ISSN:0957-6509. ...

Yu Ding; Douwe Stapersma; Hugo Grimmelius

2012-10-29T23:59:59.000Z

389

Oxygen-Enriched Combustion for Military Diesel Engine Generators  

Broader source: Energy.gov [DOE]

Substantial increases in brake power and considerably lower peak pressure can result from oxygen-enriched diesel combustion

390

Trash or treasure? Putting coal combustion waste to work  

SciTech Connect (OSTI)

The use of coal combustion wastes from power plants in construction materials, leaching and the impact of regulations are discussed.

Tenenbaum, D.J.

2009-11-15T23:59:59.000Z

391

Traveling-Wave Thermoacoustic Engines With Internal Combustion  

DOE Patents [OSTI]

Thermoacoustic devices are disclosed wherein, for some embodiments, a combustion zone provides heat to a regenerator using a mean flow of compressible fluid. In other embodiments, burning of a combustible mixture within the combustion zone is pulsed in phase with the acoustic pressure oscillations to increase acoustic power output. In an example embodiment, the combustion zone and the regenerator are thermally insulated from other components within the thermoacoustic device.

Weiland, Nathan Thomas (Blacksburg, VA); Zinn, Ben T. (Atlanta, GA); Swift, Gregory William (Sante Fe, NM)

2004-05-11T23:59:59.000Z

392

Advanced Combustion Modeling with STAR-CD using Transient Flemelet...  

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

occurs - Spray modeling is required * Autoignition, combustion, pollutant formation chemistry - Kinetic modeling required for various fuels - Soot, NOx models required *...

393

Simulation of High Efficiency Clean Combustion Engines and Detailed...  

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

ongoing work exploring fuel chemistry, analysis of and improving simulation methodologies for high efficiency clean combustion regimes, and computational performance...

394

Impact of Extreme Injection Pressure and EGR on the Combustion...  

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

Analyse of the Injection System * Simulation * Hydraulic Characterisation * Optical Spray Diagnostics Engine Investigations * Experimental Results * Optical Combustion...

395

Combustion Air Preheat Should Be More Than Simply Recycling Energy  

E-Print Network [OSTI]

Combustion air preheat can and should result in fuel savings far in excess of the energy added to the combustion air. In a typical installation of air preheat on a fired tubular reactor, the addition of 2.5 million BTU/hr to the combustion air...

Grantom, R. L.

1980-01-01T23:59:59.000Z

396

ME 374C Combustion Engine Processes ABET EC2000 syllabus  

E-Print Network [OSTI]

combustion engines, fuels, carburetion, combustion, exhaust emissions, knock, fuel injection, and factors engine, although diesels and 2-strokes are also discussed. Topics Covered (# of classes per topic): 1 of an Engineering System 4. Introduction to Engine Modeling 5. Fuels 6. Combustion and Knock 7. 4-stroke SI Engines

Ben-Yakar, Adela

397

Fast computation of multi-scale combustion systems  

Science Journals Connector (OSTI)

...consider a detailed combustion mechanism for air...The mean specific heat (under constant...being the specific heat of species i (mass...with a detailed combustion mechanism, where...between retrieved data and detailed solution...combustion mechanism for hydrocarbons. Moreover, on...

2011-01-01T23:59:59.000Z

398

Paper # A02 Topic: Laminar Flames US Combustion Meeting  

E-Print Network [OSTI]

been focused on synthetic fuel gas (syngas) combustion. Syngas is derived from coal throughPaper # A02 Topic: Laminar Flames 1 5th US Combustion Meeting Organized by the Western States Section of the Combustion Institute and Hosted by the University of California at San Diego March 25

Seitzman, Jerry M.

399

NOTE / NOTE Variability in organic matter lost by combustion in  

E-Print Network [OSTI]

) to the atmosphere through combustion of biomass. An estimated 1470 ± 59 km2 of peatland burns annually in boreal libère du carbone (C) directement dans l'atmosphère par la combustion de biomasse. AnnuellementNOTE / NOTE Variability in organic matter lost by combustion in a boreal bog during the 2001

Benscoter, Brian W.

400

Combustion Model for a CFB Boiler with Consideration of Post-Combustion in the Cyclone  

Science Journals Connector (OSTI)

Severe post combustion in the cyclone of CFB boilers could destroy heat absorbing balance among ... rarely considered in the design phase of a CFB boiler. Based on our previous experiment results ... added into a...

S. H. Li; H. R. Yang; H. Zhang; Y. X. Wu…

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Control of Combustion Processes in an Internal Combustion Engine by Low-Temperature Plasma  

Science Journals Connector (OSTI)

A new method of operation of internal combustion engines enhances power and reduces fuel consumption and exhaust toxicity. Low-temperature plasma control combines working processes of thermal engines and steam machines into a single process.

E. A. Olenev

2002-07-01T23:59:59.000Z

402

Control of Combustion Processes in an Internal Combustion Engine by Low-Temperature Plasma  

Science Journals Connector (OSTI)

A new method of operation of internal combustion engines enhances power and reduces fuel consumption and exhaust toxicity. Low-temperature plasma control combines working processes of thermal engines and steam...

E. A. Olenev

2002-07-01T23:59:59.000Z

403

Assessment of Combustion and Turbulence Models for the Simulation of Combustion Processes in a DI Diesel Engine  

Broader source: Energy.gov [DOE]

Various applied combustion and turbulence models were investigated along with chemical kinetic mechanisms simulating a biodiesel-fueled engine

404

Some Experimental Studies of Oscillatory Combustion  

Science Journals Connector (OSTI)

Measurements of the perturbations in pressure as recorded by flush?mounted transducers during the combustion of mixtures of air and natural gas in a cooled copper tube at atmospheric pressure are reported for a range of mixture ratios. Also presented are the residual quantities of the oxides of nitrogen as well as the principal components of the products of reaction. The results indicate two stable modes of oscillation. One was found predominantly at mixture ratios above stoichiometric. There was a region near stoichiometric where both modes existed. The quantities of the residual oxides of nitrogen were from 10–30 times as large during oscillatory combustion as during relatively steady combustion. In addition measurements in a smaller cooled copper combustor at pressures up to 50 lb/sq in. absolute are recorded. Again two stable modes of oscillation were encountered and the double amplitude of the oscillation for the mode near stoichiometric was nearly five times as great as that away from stoichiometric. The influence of mixture ratio and rates of flow was explored. The quantities of the oxides of nitrogen were determined after quenching the products of reaction at rates of approximately 5° per ?sec. Again the presence of oscillatory combustion appeared to exert a pronounced influence on the presence of oxides of nitrogen. In the case of the high?pressure combustor the premixed fuel and oxidant were introduced through a supersonic converging?diverging nozzle to avoid coupling between the feed system and the combustor.

B. H. Sage

1963-01-01T23:59:59.000Z

405

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

406

Starting apparatus for internal combustion engines  

DOE Patents [OSTI]

This report is a patent description for a system to start an internal combustion engine. Remote starting and starting by hearing impaired persons are addressed. The system monitors the amount of current being drawn by the starter motor to determine when the engine is started. When the engine is started the system automatically deactivates the starter motor. Five figures are included.

Dyches, G.M.; Dudar, A.M.

1995-01-01T23:59:59.000Z

407

A MODEL FOR POROUS-MEDIUM COMBUSTION  

Science Journals Connector (OSTI)

......usually taken from experiments; Vo is determined by the inlet gas velocity under consideration, and for the typical combustion processes where Vo is parallel to the z-axis in which we are interested it is natural to choose V3o~0-1 to 1-Oms......

J. NORBURY; A. M. STUART

1989-02-01T23:59:59.000Z

408

Sandia National Laboratories Combustion Research Facility  

E-Print Network [OSTI]

Hydrogen & Combustion Technologies Department Livermore, CA DOE Hydrogen, Fuel Cells, and Infrastructure collector, compressor, high-P storage, pump, FC stack (efficiency vs power) · Developing: ICE gen-set, wind Borns, Scott Jones, Paul Pickard ­ Economic modeling of H2 unit cost · Production: reforming

409

Oxy-Combustion Boiler Material Development  

SciTech Connect (OSTI)

Under U.S. Department of Energy Cooperative Agreement No. DE-NT0005262 Foster Wheeler North America Corp conducted a laboratory test program to determine the effect of oxy-combustion on boiler tube corrosion. In this program, CFD modeling was used to predict the gas compositions that will exist throughout and along the walls of air-fired and oxy-fired boilers operating with low to high sulfur coals. Test coupons of boiler tube materials were coated with deposits representative of those coals and exposed to the CFD predicted flue gases for up to 1000 hours. The tests were conducted in electric tube furnaces using oxy-combustion and air-fired flue gases synthesized from pressurized cylinders. Following exposure, the test coupons were evaluated to determine the total metal wastage experienced under air and oxy-combustions conditions and materials recommendations were made. Similar to air-fired operation, oxy-combustion corrosion rates were found to vary with the boiler material, test temperature, deposit composition, and gas composition. Despite this, comparison of air-fired and oxy-fired corrosion rates showed that oxy-firing rates were, for the most part, similar to, if not lower than those of air-firing; this finding applied to the seven furnace waterwall materials (wrought and weld overlay) and the ten superheater/reheater materials (wrought and weld overlay) that were tested. The results of the laboratory oxy-combustion tests, which are based on a maximum bulk flue gas SO{sub 2} level of 3200 ppmv (wet) / 4050 ppmv (dry), suggest that, from a corrosion standpoint, the materials used in conventional subcritical and supercritical, air-fired boilers should also be suitable for oxy-combustion retrofits. Although the laboratory test results are encouraging, they are only the first step of a material evaluation process and it is recommended that follow-on corrosion tests be conducted in coal-fired boilers operating under oxy-combustion to provide longer term (one to two year) data. The test program details and data are presented herein.

Michael Gagliano; Andrew Seltzer; Hans Agarwal; Archie Robertson; Lun Wang

2012-01-31T23:59:59.000Z

410

Oxy-Combustion Boiler Material Development  

SciTech Connect (OSTI)

Under U.S. Department of Energy Cooperative Agreement No. DE-NT0005262 Foster Wheeler North America Corp conducted a laboratory test program to determine the effect of oxy-combustion on boiler tube corrosion. In this program, CFD modeling was used to predict the gas compositions that will exist throughout and along the walls of air-fired and oxy-fired boilers operating with low to high sulfur coals. Test coupons of boiler tube materials were coated with deposits representative of those coals and exposed to the CFD predicted flue gases for up to 1000 hours. The tests were conducted in electric tube furnaces using oxy-combustion and air-fired flue gases synthesized from pressurized cylinders. Following exposure, the test coupons were evaluated to determine the total metal wastage experienced under air and oxy-combustions conditions and materials recommendations were made. Similar to air-fired operation, oxy-combustion corrosion rates were found to vary with the boiler material, test temperature, deposit composition, and gas composition. Despite this, comparison of air-fired and oxy-fired corrosion rates showed that oxy-firing rates were, for the most part, similar to, if not lower than those of air-firing; this finding applied to the seven furnace waterwall materials (wrought and weld overlay) and the ten superheater/reheater materials (wrought and weld overlay) that were tested. The results of the laboratory oxy-combustion tests, which are based on a maximum bulk flue gas SO2 level of 3200 ppmv (wet) / 4050 ppmv (dry), suggest that, from a corrosion standpoint, the materials used in conventional subcritical and supercritical, air-fired boilers should also be suitable for oxy-combustion retrofits. Although the laboratory test results are encouraging, they are only the first step of a material evaluation process and it is recommended that follow-on corrosion tests be conducted in coal-fired boilers operating under oxy-combustion to provide longer term (one to two year) data. The test program details and data are presented herein.

Gagliano, Michael; Seltzer, Andrew; Agarwal, Hans; Robertson, Archie; Wang, Lun

2012-01-31T23:59:59.000Z

411

Combustion toxics: Available data and additional needs  

SciTech Connect (OSTI)

With the continuing expansion of air pollution regulations there is an increasing awareness of the potential need to assess the emissions and impact of trace compounds from combustion sources in refineries and chemical plants. It has been found that these trace compounds may be emitted as the result of incomplete fuel combustion, formation of new compounds during combustion, or the presence of inorganics (e.g., metals) in the fuel. Emission factors based on field data from these sources have recently been published by both the US Environmental Protection Agency (EPA) and the American Petroleum Institute (API). The emission factors indicate that a large number of trace compounds may be emitted from combustion sources including volatiles, semi-volatiles, PAHs, metals, and dioxins/furans. Some of these trace compounds have been classified as hazardous or toxic. A review of the EPA and API published data sets indicates that, while there is some overlap, many gaps exist in specific source and emission types. Where gaps exist, there is a lack of confirmation for the reported emission factor. Comparison of the EPA and API emission factors for gas and fuel oil fired boilers, however, indicates reasonable agreement for several metals and some PAHs where the data overlap. EPA, however, has sampled for many more metals than API and several EPA factors for PAHs are significantly higher than reported by API. Additionally tests may be warranted where there is insufficient overlap. Much additional work needs to be done to provide reliable factors which can be used to estimate trace toxic emissions from combustion. Many gaps and inconsistencies exist in the emission factors database and changes to existing factors are expected as the database is expanded.

Siegell, J.H.

2000-03-31T23:59:59.000Z

412

2009 Advanced Combustion Engine R&D Annual Report  

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

COMBUSTION COMBUSTION ENGINE RESEARCH AND DEVELOPMENT annual progress report 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009 Approved by Gurpreet Singh Team Leader, Advanced Combustion Engine R&D Office of Vehicle Technologies FY 2009 Progress rePort For AdvAnced combustion engine reseArcH And deveLoPment Energy Efficiency and Renewable Energy Office of Vehicle Technologies December 2009 U.S. Department of Energy 1000 Independence Avenue, S.W. Washington, D.C. 20585-0121 ii Advanced Combustion Engine Technologies FY 2009 Annual Progress Report

413

FEMP Technology Brief: Boiler Combustion Control and Monitoring System |  

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

Boiler Combustion Control and Monitoring Boiler Combustion Control and Monitoring System FEMP Technology Brief: Boiler Combustion Control and Monitoring System October 7, 2013 - 9:12am Addthis This composite photo shows technicians observing operation at the monitoring station and making subsequent fine adjustments on combustion system controls Technical staff are making boiler adjustments with the control and monitoring system. Photo courtesy of the Department of Defense's Environmental Security Technology Certification Program. Technology Description A novel combustion control system, along with gas sensors, sets the opening of fuel and air inlets based on flue-gas concentrations. Continuous feedback from measurements of oxygen, carbon monoxide, and nitrogen oxide concentrations enable the control system

414

Chapter 8 - Coal Combustion Residue Disposal Options  

Science Journals Connector (OSTI)

Abstract Coal combustion residues (CCRs) are presently regulated as solid waste (Subtitle D) under the Resource Conservation Recovery Act. Such classification promotes beneficial use by end-users i.e. mitigating excessive liability. According to the US Environmental Protection agency (USEPA), about 131 million tons of coal combustion residuals—including 71 million tons of fly ash, 20 million tons of bottom ash and boiler slag, and 40 million tons of flue gas desulfurization (FGD) material—were generated in the US in 2007. Of this, approximately 36% was disposed of in landfills, 21% was disposed of in surface impoundments, 38% was beneficially reused, and 5% was used as minefill. Stringent regulation, as Subtitle C (hazardous waste), would impose a perceived liability upon end-users; greatly reducing beneficial use opportunities. Mandatory use of synthetic liners—would not have prevented dike wall failure and fails to consider inherent engineering characteristics of CCRs.

Richard W. Goodwin

2014-01-01T23:59:59.000Z

415

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

416

Critical reaction rates in hypersonic combustion chemistry  

SciTech Connect (OSTI)

High Mach number flight requires that the scramjet propulsion system operate at a relatively low static inlet pressure and a high inlet temperature. These two constraints can lead to extremely high temperatures in the combustor, yielding high densities of radical species and correspondingly poor chemical combustion efficiency. As the temperature drops in the nozzle expansion, recombination of these excess radicals can produce more product species, higher heat yield, and potentially more thrust. The extent to which the chemical efficiency can be enhanced in the nozzle expansion depends directly on the rate of the radical recombination reactions. A comprehensive assessment of the important chemical processes and an experimental validation of the critical rate parameters is therefore required if accurate predictions of scramjet performance are to be obtained. This report covers the identification of critical reactions, and the critical reaction rates in hypersonic combustion chemistry. 4 refs., 2 figs.

Oldenborg, R.C.; Harradine, D.M.; Loge, G.W.; Lyman, J.L.; Schott, G.L.; Winn, K.R.

1989-01-01T23:59:59.000Z

417

Diesel Engine Combustion of Biomass Pyrolysis Oils  

Science Journals Connector (OSTI)

Biomass pyrolysis oils are manufactured through a moderate-temperature process (?500 °C) in which the biomass feedstock is subjected to rapid heating in the absence of air, where it vaporizes, cracks, and is condensed after a short residence time (?500 ms) into a dark brown liquid composed of a complex mixture of oxygenated hydrocarbons whose heating value is approximately half that of No. 2 diesel fuel. ... The combustion air inlet temperature can be preheated up to 130 °C through the use of an in-line electric heater, which allows engine operation with fuels that have long ignition delay, without relying on any ignition additives. ... Their data showed that in addition to reducing the peak heat release magnitude, slower chemical kinetics resulted in reduced rate of instantaneous heat release (the slope of the instantaneous heat release curve) in the early combustion phase, resulting in delayed peak heat release timing relative to SOC. ...

Alan Shihadeh; Simone Hochgreb

2000-02-15T23:59:59.000Z

418

Fluidized bed combustion picks up steam  

SciTech Connect (OSTI)

Industrial interest in fluidized-bed combustion (FBC) continues, although the technology has been slow to enter the marketplace. Two FBC pilot plants funded by DOE and one commercial size project are in operation. FBC designs and commercial warranties are already available from the boiler industry, but 1981 was the first year to see significant numbers of privately-funded orders, now numbering 38 out of 50 boilers. Manufacturers are working on a universal boiler able to accept any fuel, but potential users are wary of new technology without a long-term demonstration of reliability and economics. There is interest in second generation designs, a new shallow-bed design suitable for retrofitting, and circulating bed types that decouple the combustion system from the heat removal system. (DCK)

Lawn, J.

1982-02-01T23:59:59.000Z

419

Advanced Combustion R&D Selections  

Broader source: Energy.gov [DOE]

In 2013, the Department of Energy made several project selections under the Fossil Energy Advanced Combustion R&D program. Through these four selections, nearly $37 million, $26 million from the Energy Department and $11 million in cost-share from industry, universities, and other research institutions, are being committed over four years to address CO2 compliance required by the proposed regulations to reduce CO2 emissions.

420

Marine propulsion device internal combustion engine  

SciTech Connect (OSTI)

This patent describes an internal combustion engine. It comprises an engine block including a surface, means including the engine block surface for defining a substantially sealed chamber, and pressure relief means including a movable valve member for venting the chamber when the pressure in the chamber exceeds a predetermined value, the chamber containing one of the following: a flywheel, means for generating an electrical current, a finned heat exchanger, and means for starting the engine.

Anderson, P.A.; Bernau, W.A.; Breckenfeld, P.W.; Broughton, G.L.

1992-01-07T23:59:59.000Z

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" from the National Library of EnergyBeta (NLEBeta).
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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

Fluid Bed Combustion Applied to Industrial Waste  

E-Print Network [OSTI]

of its relatively recent application to coal fired steam production, fluid beds have been uti lized in industry for over 60 years. Beginning in Germany in the twenties for coal gasification, the technology was applied to catalytic cracking of heavy... system cost), use of minimum excess air required, and maintaining the min"imum reactor temperature neces sary to sustain combustion. For superautogenous fuels, where incineration. only is desired, minimum capital cost is achieved by using direct bed...

Mullen, J. F.; Sneyd, R. J.

422

Real-Time Combustion Controls and Diagnostics Sensors (CCADS)  

SciTech Connect (OSTI)

The present invention is directed to an apparatus for the monitoring of the combustion process within a combustion system. The apparatus comprises; a combustion system, a means for supplying fuel and an oxidizer, a device for igniting the fuel and oxidizer in order to initiate combustion, and a sensor for determining the current conducted by the combustion process. The combustion system comprises a fuel nozzle and an outer shell attached to the combustion nozzle. The outer shell defines a combustion chamber. Preferably the nozzle is a lean premix fuel nozzle (LPN). Fuel and an oxidizer are provided to the fuel nozzle at separate rates. The fuel and oxidizer are ignited. A sensor positioned within the combustion system comprising at least two electrodes in spaced-apart relationship from one another. At least a portion of the combustion process or flame is between the first and second electrodes. A voltage is applied between the first and second electrodes and the magnitude of resulting current between the first and second electrodes is determined.

Thornton, J.D.; Richard, G.A.; Dodrill, K.A.; Nutter, R.S. Jr; Straub, D.

2005-05-03T23:59:59.000Z

423

Coal combustion science. Quarterly progress report, April 1993--June 1993  

SciTech Connect (OSTI)

This document is a quarterly status report of the Coal Combustion Science Project that is being conducted at the Combustion Research Facility, Sandia National Laboratories. The information reported is for Apr-Jun 1993. The objective of this work is to support the Office of Fossil Energy in executing research on coal combustion science. This project consists of basic research on coal combustion that supports both the PETC Direct Utilization Advanced Research and Technology Development Program, and the International Energy Agency Coal Combustion Science Project. The objective of the kinetics and mechanisms of pulverized coal char combustion task is to characterize the combustion behavior of selected US coals under conditions relevant to industrial pulverized coal-fired furnaces. Work is being done in four areas: kinetics of heterogeneous fuel particle populations; char combustion kinetics at high carbon conversion; the role of particle structure and the char formation process in combustion and; unification of the Sandia char combustion data base. This data base on the high temperature reactivities of chars from strategic US coals will permit identification of important fuel-specific trends and development of predictive capabilities for advanced coal combustion systems. The objective of the fate of inorganic material during coal combustion task is the establish a quantitative understanding of the mechanisms and rates of transformation, fragmentation, and deposition of inorganic material during coal combustion as a function of coal type, particle size and temperature, the initial forms and distribution of inorganic species in the unreacted coal, and the local gas temperature and composition. In addition, optical diagnostic capabilities are being developed for in situ, real-time detection of inorganic vapor species and surface species during ash deposition. Selected papers have been indexed separately for inclusion in the Energy Science and Technology Database.

Hardesty, D.R. [ed.

1994-05-01T23:59:59.000Z

424

Electronic governor for an internal combustion engine  

SciTech Connect (OSTI)

An electronic governor for an internal combustion engine provided with a fuel injection pump for supplying fuel to the engine and having a control rack for adjusting fuel injection amount is described comprising, means providing a designated speed signal Vno indicative of the desired rotational speed No of the internal combustion engine, a speed detector detecting the rotational speed N of the internal combustion engine and producing the speed detection signal Vn indicative of the rotational speed N, a rack position detector detecting the position of the rack and producing a rack position detection signal VL indicative of the position of the rack, a speed deviation operation circuit responsive to the speed detection signal Vn for producing a constant speed control signal Vnd for effecting control to maintain the deviation of the actual rotational speed N from the designated rotational speed No within a permissible range, a rack position deviation operation circuit for producing a maximum rack position control signal VLd for effecting control to maintain the deviation of the rack position, a control mode selector and means responsive to the output of the control mode selector for controlling the rack to cause the deviation of the actual rotational speed N from the designated rotational speed No or the rack position from the maximum rack position to be within a certain range.

Nanjyo, H.; Suzuki, H.

1987-11-24T23:59:59.000Z

425

In situ combustion field experiences in Venezuela  

SciTech Connect (OSTI)

A literature review of four in situ combustion projects: in Miga, Tia Juana, Melones and Morichal fields in Venezuela was made, and a summary of these projects is presented. Reservoir description and project performance data were analyzed. The behavior of the four in situ combustion field tests can be summarized as follows: The problems most often encountered were corrosion and high temperature producing wells. The direction in which the burning front moved was guided essentially by reservoir characteristics. The produced oil was upgraded by about 4{degrees} API, and viscosity was substantially reduced. For Mirochal and Miga fields, the analyses of available information from the combustion projects indicated that the process has been successful in the affected region. Conclusions from this review indicate that the two most frequent problems encountered were operational problems in producing wells and the direction of the burning front. The heterogeneous nature of the sands probably resulted in the burning front moving in a preferential direction, hence reducing areal sweep efficiency.

Villalba, M.; Estrada, M.; Bolivar, J. [INTEVEP, Caracas (Venezuela)

1995-02-01T23:59:59.000Z

426

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

427

Microsoft PowerPoint - Proceedings Cover Sheets  

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

RECOVERY OF LIQUID CO2 AND PARTICULATES FROM BIOMASS-FIRED RECOVERY OF LIQUID CO2 AND PARTICULATES FROM BIOMASS-FIRED POWER PLANTS USING PRESSURIZED COMBUSTION Alex G. Fassbender, P.E. Robert S. Henry ThermoEnergy Power Systems, LLC. www.thermoenergy.com Thomas E. Carnahan, Ph.D. University of Nevada, Reno www.unr.edu SUMMARY The novel i pressurized oxy-fuel or air-blown approach known as the ThermoEnergy Integrated Power System (TIPS) is a carbon-capture capable concept designed to produce electricity and steam from high-moisture fuels with near zero air emission of priority and toxic pollutants. The increased system pressure enables use of gas-to-liquid steam-hydroscrubbing to collect and remove pollutants and recover latent heat from water entrained or produced in the combustion process. The pressurized oxy-fuel approach also enables CO

428

Microsoft PowerPoint - Proceedings Cover Sheets  

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

Pollutant Removal with Oxy-Fuel Combustion: Pollutant Removal with Oxy-Fuel Combustion: Current Technology Applied to CO 2 and Multi-Pollutant Capture Danylo Oryshchyn, Tom Ochs, Brian Patrick, Steve Gerdemann, Cathy Summers, Jake Armstrong, Paul Turner, Mark Schoenfield, Thomas Weber Fifth Annual Conference on Carbon Capture & Sequestration May, 2006 National Energy Technology Laboratory Office of Fossil Energy What is Integrated Pollutant Removal? IPR * A means for achieving ultra-low emissions from a fossil-fuel burning power plant * Capture ALL pollutants - SO X - NO X - Particulates - Hg - And CO 2 Integrated Pollutant Removal * Goals - Remove all pollutants including CO 2 from exhaust stream of power plants - Minimize cost of pollutant removal - Use existing technologies * Reality - CO 2 removal adds to cost of any power

429

Microsoft PowerPoint - Proceedings Cover Sheets  

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

Fifth Annual Conference on Fifth Annual Conference on Carbon Capture & Sequestration Steps Toward Deployment Oxy-Combustion (2) Oxy-Combustion (2) CO 2 Capture by Membrane Based Oxy-Fuel Boiler CO 2 Capture by Membrane Based Oxy-Fuel Boiler May 8-11, 2006 * Hilton Alexandria Mark Center * Alexandria, Virginia Minish M. Shah, Bart van Hassel, Max Christie and Juan Li Copyright © 2006 Praxair Technology, Inc. All rights reserved. Outline Outline Advanced Boiler Concept Technology Status Cost/Performance Projections Summary Advanced Boiler Concept Advanced Boiler Concept Gaseous Fuel Water Steam Carbon Dioxide Air Heat recovery Water OTM combustor Air-O 2 Flue Gas + Heat Patents US 5,837,125 US 5,888,272 US 6,382,958 US 6,394,043 US 6,539,719 US 6,562,104 Patents US 5,837,125 US 5,888,272

430

Hybrid Combustion-Gasification Chemical Looping  

SciTech Connect (OSTI)

For the past several years Alstom Power Inc. (Alstom), a leading world-wide power system manufacturer and supplier, has been in the initial stages of developing an entirely new, ultra-clean, low cost, high efficiency power plant for the global power market. This new power plant concept is based on a hybrid combustion-gasification process utilizing high temperature chemical and thermal looping technology The process consists of the oxidation, reduction, carbonation, and calcination of calcium-based compounds, which chemically react with coal, biomass, or opportunity fuels in two chemical loops and one thermal loop. The chemical and thermal looping technology can be alternatively configured as (i) a combustion-based steam power plant with CO{sub 2} capture, (ii) a hybrid combustion-gasification process producing a syngas for gas turbines or fuel cells, or (iii) an integrated hybrid combustion-gasification process producing hydrogen for gas turbines, fuel cells or other hydrogen based applications while also producing a separate stream of CO{sub 2} for use or sequestration. In its most advanced configuration, this new concept offers the promise to become the technology link from today's Rankine cycle steam power plants to tomorrow's advanced energy plants. The objective of this work is to develop and verify the high temperature chemical and thermal looping process concept at a small-scale pilot facility in order to enable AL to design, construct and demonstrate a pre-commercial, prototype version of this advanced system. In support of this objective, Alstom and DOE started a multi-year program, under this contract. Before the contract started, in a preliminary phase (Phase 0) Alstom funded and built the required small-scale pilot facility (Process Development Unit, PDU) at its Power Plant Laboratories in Windsor, Connecticut. Construction was completed in calendar year 2003. The objective for Phase I was to develop the indirect combustion loop with CO{sub 2} separation, and also syngas production from coal with the calcium sulfide (CaS)/calcium sulfate (CaSO{sub 4}) loop utilizing the PDU facility. The results of Phase I were reported in Reference 1, 'Hybrid Combustion-Gasification Chemical Looping Coal Power Development Technology Development Phase I Report' The objective for Phase II was to develop the carbonate loop--lime (CaO)/calcium carbonate (CaCO{sub 3}) loop, integrate it with the gasification loop from Phase I, and ultimately demonstrate the feasibility of hydrogen production from the combined loops. The results of this program were reported in Reference 3, 'Hybrid Combustion-Gasification Chemical Looping Coal Power Development Technology Development Phase II Report'. The objective of Phase III is to operate the pilot plant to obtain enough engineering information to design a prototype of the commercial Chemical Looping concept. The activities include modifications to the Phase II Chemical Looping PDU, solids transportation studies, control and instrumentation studies and additional cold flow modeling. The deliverable is a report making recommendations for preliminary design guidelines for the prototype plant, results from the pilot plant testing and an update of the commercial plant economic estimates.

Herbert Andrus; Gregory Burns; John Chiu; Gregory Lijedahl; Peter Stromberg; Paul Thibeault

2009-01-07T23:59:59.000Z

431

Pre-Combustion Carbon Capture Research | Department of Energy  

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

Pre-Combustion Carbon Capture Research Pre-Combustion Carbon Capture Research Pre-Combustion Carbon Capture Research Pre-combustion capture refers to removing CO2 from fossil fuels before combustion is completed. For example, in gasification processes a feedstock (such as coal) is partially oxidized in steam and oxygen/air under high temperature and pressure to form synthesis gas. This synthesis gas, or syngas, is a mixture of hydrogen, carbon monoxide, CO2, and smaller amounts of other gaseous components, such as methane. The syngas can then undergo the water-gas shift reaction to convert CO and water (H2O) to H2 and CO2, producing a H2 and CO2-rich gas mixture. The concentration of CO2 in this mixture can range from 15-50%. The CO2 can then be captured and separated, transported, and ultimately sequestered, and the H2-rich fuel combusted.

432

CO2 Emissions from Fuel Combustion | Open Energy Information  

Open Energy Info (EERE)

CO2 Emissions from Fuel Combustion CO2 Emissions from Fuel Combustion Jump to: navigation, search Tool Summary Name: CO2 Emissions from Fuel Combustion Agency/Company /Organization: International Energy Agency Sector: Energy Topics: Baseline projection, GHG inventory Resource Type: Dataset, Publications Website: www.iea.org/co2highlights/co2highlights.pdf CO2 Emissions from Fuel Combustion Screenshot References: CO2 Emissions from Fuel Combustion[1] Overview "This annual publication contains: estimates of CO2 emissions by country from 1971 to 2008 selected indicators such as CO2/GDP, CO2/capita, CO2/TPES and CO2/kWh CO2 emissions from international marine and aviation bunkers, and other relevant information" Excel Spreadsheet References ↑ "CO2 Emissions from Fuel Combustion"

433

NREL: Vehicles and Fuels Research - Fuel Combustion Lab  

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

Fuel Combustion Lab Fuel Combustion Lab NREL's Fuel Combustion Laboratory focuses on characterizing fuels at the molecular level. This information can then be used to understand and predict the fuel's effect on engine performance and emissions. By understanding the effects of fuel chemistry on ignition we can develop fuels that enable more efficient engine designs, using both today's technology and future advanced combustion concepts. This lab supports the distributed Renewable Fuels and Lubricants (ReFUEL) Laboratory, and the Biofuels activity. Photo of assembled IQT. Ignition Quality Tester The central piece of equipment in the Fuel Combustion Laboratory is the Ignition Quality Tester (IQT(tm)). The IQT(tm) is a constant volume combustion vessel that is used to study ignition properties of liquid

434

Theoretical Adiabatic Temperature and Chemical Composition of Sodium Combustion Flame  

SciTech Connect (OSTI)

Sodium fire safety analysis requires fundamental combustion properties, e.g., heat of combustion, flame temperature, and composition. We developed the GENESYS code for a theoretical investigation of sodium combustion flame.Our principle conclusions on sodium combustion under atmospheric air conditions are (a) the maximum theoretical flame temperature is 1950 K, and it is not affected by the presence of moisture; the uppermost limiting factor is the chemical instability of the condensed sodium-oxide products under high temperature; (b) the main combustion product is liquid Na{sub 2}O in dry air condition and liquid Na{sub 2}O with gaseous NaOH in moist air; and (c) the chemical equilibrium prediction of the residual gaseous reactants in the flame is indispensable for sodium combustion modeling.

Okano, Yasushi; Yamaguchi, Akira [O-arai Engineering Center (Japan)

2003-12-15T23:59:59.000Z

435

Method of controlling cyclic variation in engine combustion  

DOE Patents [OSTI]

Cyclic variation in combustion of a lean burning engine is reduced by detecting an engine combustion event output such as torsional acceleration in a cylinder (i) at a combustion event (k), using the detected acceleration to predict a target acceleration for the cylinder at the next combustion event (k+1), modifying the target output by a correction term that is inversely proportional to the average phase of the combustion event output of cylinder (i) and calculating a control output such as fuel pulse width or spark timing necessary to achieve the target acceleration for cylinder (i) at combustion event (k+1) based on anti-correlation with the detected acceleration and spill-over effects from fueling. 27 figs.

Davis, L.I. Jr.; Daw, C.S.; Feldkamp, L.A.; Hoard, J.W.; Yuan, F.; Connolly, F.T.

1999-07-13T23:59:59.000Z

436

Chemical Kinetic Models for HCCI and Diesel Combustion  

SciTech Connect (OSTI)

Hydrocarbon fuels for advanced combustion engines consist of complex mixtures of hundreds or even thousands of different components. These components can be grouped into a number of chemically distinct classes, consisting of n-paraffins, branched paraffins, cyclic paraffins, olefins, oxygenates, and aromatics. Biodiesel contains its own unique chemical class called methyl esters. The fractional amounts of these chemical classes are quite different in gasoline, diesel fuel, oil-sand derived fuels and bio-derived fuels, which contributes to the very different combustion characteristics of each of these types of combustion systems. The objectives of this project are: (1) Develop detailed chemical kinetic models for fuel components used in surrogate fuels for diesel and HCCI engines; (2) Develop surrogate fuel models to represent real fuels and model low temperature combustion strategies in HCCI and diesel engines that lead to low emissions and high efficiency; and (3) Characterize the role of fuel composition on low temperature combustion modes of advanced combustion engines.

Pitz, W J; Westbook, C K; Mehl, M

2008-10-30T23:59:59.000Z

437

The proceedings of the 31st international technical conference on coal utilization and fuel systems  

SciTech Connect (OSTI)

Topics covered include oxy-fuel, gasification, CO{sub 2} sequestration, coal preparation, opportunities and barriers for overall energy efficiency improvement, advanced sensors and controls, co-firing, computer simulations and virtual power plants, hydrogen fuels from coal, advanced materials, combustion optimisation, innovations for existing power plants, CO{sub 2} capture, biomass, alternative methods of hydrogen production, NOx control, mercury, low NOx technology, coal to liquids, and coal compatible fuel cells.

Sakkestad, B.A. (ed.)

2006-07-01T23:59:59.000Z

438

FY 2008 Progress Report for Advanced Combustion Engine Technologies  

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

COMBUSTION COMBUSTION ENGINE TECHNOLOGIES annual progress report 2008 V e h i c l e T e c h n o l o g i e s P r o g r a m U.S. Department of Energy 1000 Independence Avenue, S.W. Washington, D.C. 20585-0121 FY 2008 Progress rePort For AdvAnced combustion engine technologies Energy Efficiency

439

Mercury Release and Speciation in Chemical Looping Combustion of Coal  

Science Journals Connector (OSTI)

Mercury Release and Speciation in Chemical Looping Combustion of Coal ... In the in situ Gasification Chemical Looping Combustion of coal (iG-CLC), the fuel is gasified in situ in the fuel reactor and gasification products are converted to CO2 and H2O by reaction with the oxygen carrier. ... This work is the first study on mercury release in Chemical Looping Combustion of coal. ...

T. Mendiara; M. T. Izquierdo; A. Abad; P. Gayán; F. García-Labiano; L. F. de Diego; J. Adánez

2014-03-06T23:59:59.000Z

440

Emissions Characterization from Advanced Combustion & Alternative Fuels -  

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

Emissions Characterization from Advanced Combustion & Emissions Characterization from Advanced Combustion & Alternative Fuels Exhaust emissions from engines operating in advanced combustion modes such as PCCI (Premixed Charge Compression Ignition) and HCCI (Homogeneous Charge Compression Ignition) are analyzed with an array of analytical tools. Furthermore, emissions from a variety of alternative fuels and mixtures thereof with conventional gasoline and diesel fuels are also measured. In addition to measuring the criteria pollutants nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons (HCs) are also measured and categorized based on chemistry. These chemical details of the emissions provide important information for optimizing combustion processes to maximize fuel efficiency while minimizing emissions

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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

Computationally Efficient Modeling of High-Efficiency Clean Combustion...  

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

Peer Evaluation ace012aceves2011o.pdf More Documents & Publications Simulation of High Efficiency Clean Combustion Engines and Detailed Chemical Kinetic Mechanisms Development...

442

Fuel Effects on Ignition and Their Impact on Advanced Combustion...  

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

Ignition and Their Impact on Advanced Combustion Engines Joshua D. Taylor - National Renewable Energy Laboratory Stuart Neill, Hailin Li - National Research Council Canada...

443

A University Consortium on Low Temperature Combustion (LTC) for...  

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

A University Consortium on Efficient and Clean High-Pressure, Lean Burn (HPLB) Engines A University Consortium on High Pressure, Lean Combustion for Efficient and Clean IC...

444

Fuels Performance: Navigating the Intersection of Fuels and Combustion...  

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

chemistry, ignition kinetics, combustion, and emissions, with innovative approaches to engines and fuels that meet drivers' expectations, while minimizing petroleum use and GHGs....

445

OLCF Researcher to Work with Clean Combustion Center at Saudi...  

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

with Engine Knock Research Researchers at the King Abdullah University of Science and Technology Clean Combustion Research Center and ORNL are using supercomputer simulations...

446

New Argonne initiative to examine the details of the combustion...  

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

New Argonne initiative to examine the details of the combustion process By Jared Sagoff * July 15, 2014 Tweet EmailPrint ARGONNE, Ill. - Every science experiment and every...

447

LabVIEW internal combustion engine detonation frequency analysis.  

E-Print Network [OSTI]

??The project discussed herein is to develop the hardware and software necessary to identify the detonation frequency of a BMW S14 internal combustion engine. This… (more)

McClain, Kevin

2011-01-01T23:59:59.000Z

448

Large Eddy Simulation (LES) Applied to Advanced Engine Combustion...  

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

for engine combustion and emission control - Efficient and routine use of High-Performance-Computing (HPC) to establish optimal balance between predictive and affordable models...

449

Advancement in Fuel Spray and Combustion Modeling for Compression...  

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

chemical kinetics into fluid dynamics simulations" "Development of High-Performance Computing (HPC) tools to provide unique insights into the spray and combustion...

450

Combustion Turbine CHP System for Food Processing Industry -...  

Office of Environmental Management (EM)

congestion on the constrained Northeast power grid. The fact sheet contains performance data from the plant after one year of operation. Combustion Turbine CHP System for Food...

451

Trace element content of magnetohydrodynamic coal combustion effluents  

Science Journals Connector (OSTI)

Trace element contents from effluents of a simulated coal-fired magnetohydrodynamic (MHD) combustion process have been determined using thermal neutron activation analysis techniques. The quality control consi...

M. S. Akanni; V. O. Ogugbuaja; W. D. James

1983-01-01T23:59:59.000Z

452

Modeling Combustion Control for High Power Diesel Mode Switching  

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

and Emissions Research Conference 2010 Modeling Combustion Control for High Power Diesel Mode Switching P-20 Motivation * High power LTC-diesel mode operation * Transient...

453

Multicylinder Diesel Engine for Low Temperature Combustion Operation  

Broader source: Energy.gov [DOE]

Fuel injection strategies to extend low temperature combustion temperatures to yield low NOx at higher loads and better efficiency over the speed-load range

454

Vehicle Technologies Office Merit Review 2014: Advanced Combustion and Fuels  

Broader source: Energy.gov [DOE]

Presentation given by NREL at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about advanced combustion and fuels.

455

Concept development of rotating bed chemical looping combustion reactor:.  

E-Print Network [OSTI]

??In this research a new rotary chemical looping combustion (CLC) reactor was developed which is suitable for larger scales and solves some of the issues… (more)

Hermans, C.W.M.

2013-01-01T23:59:59.000Z

456

Chemical-Looping Combustion With Gaseous Fuels: Thermodynamic Parametric Modeling  

Science Journals Connector (OSTI)

This communication reports the thermodynamic equilibrium analysis of the reactions involved in a chemical-looping combustion (CLC) process using methane, ethane and ... energy minimization technique determining t...

Mohammad M. Hossain

2014-05-01T23:59:59.000Z

457

Oxygen Carriers for Solid Fuel Chemical Looping Combustion Process...  

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

Oxygen Carriers for Solid Fuel Chemical Looping Combustion Process Regenerable Mixed Copper-Iron-Inert Support Oxygen Carriers National Energy Technology Laboratory Contact NETL...

458

Chemical Looping Combustion Cold Flow Model commissioning and performance evaluation.  

E-Print Network [OSTI]

?? SINTEF and NTNU are planning to build a 150 kWth Chemical Looping Combustion (CLC) reactor system. This is new technology and the CLC reactor… (more)

Tjøstheim, Sindre

2010-01-01T23:59:59.000Z

459

Experimental characterization and chemical kinetics study of chemical looping combustion .  

E-Print Network [OSTI]

??Chemical looping combustion (CLC) is one of the most promising technologies to achieve carbon capture in fossil fuel power generation plants. A novel rotary-bed reactor… (more)

Chen, Tianjiao, S.M. Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

460

Combustion Targets for Low Emissions and High Efficiency | Department...  

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

Targets for Low Emissions and High Efficiency Combustion Targets for Low Emissions and High Efficiency 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and...

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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.


461

Overview of DOE Advanced Combustion Engine R&D  

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

modeling and experiments Advanced diagnostics including optical, laser, x-ray, and neutron based techniques Multi-dimensional computational models and combustion...

462

2002 Spring Technical Meeting Central States Section / The Combustion Institute  

E-Print Network [OSTI]

Research Laboratory A Multi-dimensional Combustion Model for Gasoline Direct-Injection Engine Design 10 Laboratory A Numerical Study of the Impacts of the Blending

Tennessee, University of

463

Combustion Exhaust Gas Heat to Power usingThermoelectric Engines...  

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

Solutions Combustion Exhaust Gas Heat to Power using Thermoelectric Engines John LaGrandeur October 5, 2011 Advanced Thermoelectric Solutions - 1 - Market motivation based on CO 2...

464

chemical-looping-combustion | netl.doe.gov  

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

fossil fuels in nearly pure oxygen, rather than air, presents an opportunity to simplify carbon dioxide (CO2) capture in power plant applications. Oxy-combustion power generation...

465

Advances in Diode Laser Absorption Sensors for Combustion and Propulsion  

Science Journals Connector (OSTI)

Progress is reported in the evolution of diode laser sensors for combustion and propulsion systems. Applications are diverse, ranging from IC engines and gas turbine combustors to...

Hanson, Ronald K

466

NREL: Transportation Research - Fuel Combustion and Engine Performance  

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

Fuel Combustion and Engine Performance Photo of a gasoline direct injection piston with injector. NREL studies the effects of new fuel properties on performance and emissions in...

467

Fine Particle and Mercury Formation and Control during Coal Combustion.  

E-Print Network [OSTI]

??Pulverized coal combustion is widely used worldwide for the production of electricity. However, it is one of the primary emission sources of air pollutants, including… (more)

Wang, Xiaofei

2014-01-01T23:59:59.000Z

468

2010 1st Annual CEFRC Conference - Combustion Energy Frontier...  

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

and Diagnostics Nils Hansen, Sandia National Laboratories Chemical Kinetics of Combustion Processes Hai Wang, University of Southern California Chemistry and Transport Flame and...

469

Fluidized Bed Combustion of Low Grade Coals and Biomass  

Science Journals Connector (OSTI)

This technology is being used all over the world for biomass as well as for coal combustion. Nevertheless, there are no results available...

L. Armesto; A. Cabanillas; A. Bahillo

1997-01-01T23:59:59.000Z

470

2010-2011 Publications & Lectures - Combustion Energy Frontier...  

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

Zheng; Burke, M. P.; and Ju, Yiguang On the critical flame radius and minimum ignition energy for spherical flame initiation, Proc. Combust. Inst., 33, 1219-1226 (2011)....

471

Advancement in Fuel Spray and Combustion Modeling for Compression...  

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

Spray, Combustion, & Emission Modeling using KH-ACT Primary Breakup Model & Detailed Chemistry Vehicle Technologies Office Merit Review 2014: Advancement in Fuel Spray and...

472

Fuel Chemistry and Cetane Effects on HCCI Performance, Combustion...  

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

Coal-Derived Liquids to Enable HCCI Technology Fuel Chemistry and Cetane Effects on HCCI Performance, Combustion, and Emissions Cetane Performance and Chemistry Comparing...

473

Simulation of High Efficiency Clean Combustion Engines and Detailed...  

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

continuing work on exploring fuel chemistry, analysis of advanced combustion regimes, and improvements in simulation methodologies deer12flowers.pdf More Documents & Publications...

474

Simulation of High Efficiency Clean Combustion Engines and Detailed...  

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

on LLNL website and by email http:www-pls.llnl.gov?urlscienceandtechnology-chemistry-combustion LLNL-PRES-427539 17 LLNL-PRES-477791 2011 DEER Lawrence Livermore...

475

Impact of Variable Valve Timing on Low Temperature Combustion...  

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

and Combustion Effects of VVA Ignition Temperature and Ignition Delay Soot Chemistry Combine effects with PCCI Extension of LTC Operation Summary Acknowledgements and...

476

On the Combustion Chemistry of Biofuels and The Activist Engineer.  

E-Print Network [OSTI]

??This dissertation presents detailed work on the chemical kinetics of biofuel/fossil fuel blends through experimental combustion studies, and explores whether or not issues of the… (more)

Karwat, Darshan Mukesh

2012-01-01T23:59:59.000Z

477

Gasoline-Like Fuel Effects on Advanced Combustion Regimes | Department...  

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

Regimes Gasoline-Like Fuel Effects on Advanced Combustion Regimes 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer...

478

Gasoline-like fuel effects on advanced combustion regimes | Department...  

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

regimes Gasoline-like fuel effects on advanced combustion regimes 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer...

479

Characterization of Particulate Emissions from GDI Engine Combustion...  

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

Emissions from GDI Engine Combustion with Alcohol-blended Fuels Analysis showed that gasoline direct injection engine particulates from alcohol-blended fuels are significantly...

480

Light Duty Efficient Clean Combustion | Department of Energy  

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

25, 2008 in Bethesda, Maryland. merit08frazier.pdf More Documents & Publications Light Duty Efficient Clean Combustion Exhaust Energy Recovery: 2008 Semi-Mega Merit Review...

Note: This page contains sample records for the topic "oxy-fuel combustion cxs" 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.


481

Investigation of Fuel Quality Impact on the Combustion and Exhaust...  

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

SI Engine Operated on Low BTU Gases Research results validate an engine simulation model and provide guidelines for the improved control of combustion stability of SI...

482

Advanced Diesel Combustion with Low Hydrocarbon and Carbon Monoxide...  

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

Combustion with Low Hydrocarbon and Carbon Monoxide Emissions Poster Location P-19 Gregory K. Lilik, Andr L. Boehman Department of Energy & Mineral Engineering EMS Energy...

483

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

484

VOC Destruction by Catalytic Combustion Microturbine  

SciTech Connect (OSTI)

This project concerned the application of a catalytic combustion system that has been married to a micro-turbine device. The catalytic combustion system decomposes the VOC's and transmits these gases to the gas turbine. The turbine has been altered to operate on very low-level BTU fuels equivalent to 1.5% methane in air. The performance of the micro-turbine for VOC elimination has some flexibility with respect to operating conditions, and the system is adaptable to multiple industrial applications. The VOC source that was been chosen for examination was the emissions from coal upgrading operations. The overall goal of the project was to examine the effectiveness of a catalytic combustion based system for elimination of VOCs while simultaneously producing electrical power for local consumption. Project specific objectives included assessment of the feasibility for using a Flex-Microturbine that generates power from natural gas while it consumes VOCs generated from site operations; development of an engineering plan for installation of the Flex-Microturbine system; operation of the micro-turbine through various changes in site and operation conditions; measurement of the VOC destruction quantitatively; and determination of the required improvements for further studies. The micro-turbine with the catalytic bed worked effectively to produce power on levels of fuel much lower than the original turbine design. The ability of the device to add or subtract supplemental fuel to augment the amount of VOC's in the inlet air flow made the device an effective replacement for a traditional flare. Concerns about particulates in the inlet flow and the presence of high sulfur concentrations with the VOC mixtures was identified as a drawback with the current catalytic design. A new microturbine design was developed based on this research that incorporates a thermal oxidizer in place of the catalytic bed for applications where particulates or contamination would limit the lifetime of the catalytic bed.

Tom Barton

2009-03-10T23:59:59.000Z

485

The fluidized bed combustion ash management puzzle  

SciTech Connect (OSTI)

As the electric and industrial power generation industry upgrades and expands, the amount of coal and other solid fuels also expands. With increased environmental controls, the introduction of a competitive market for power, and the increased interest in opportunity fuels will increase the usage of Fluidized Bed Combustion (FBC) boilers in the power industry. The combustion of these solid fuels will generate combustion ashes. Power generators, including FBC boilers owners, have traditionally looked to landfills for the disposal of their ash. With the tighter environmental controls being placed on landfills at the federal and state level, power generators are beginning to see constantly escalating tipping fees which now make the landfill option less attractive. In some instances, landfills are beginning to refuse to accept ash regardless of the tipping fee. In view of this, the power generators are now struggling to find a place to store or dispose of the ash that is produced by their power boiler. Other disposal alternatives such as backhaul to the mine and beneficial reuse are now being considered. Either alternative presents its own set of technical and environmental variables to be considered in developing an effective ash management plan. To be effective, these plans need to incorporate an aggressive, yet realistic, role to support beneficial reuse of the ash. Many applications exist for reuse of the various types of ash. The applications for conventional ashes such as those from pulverized coal boilers and stoker fired boilers are mature and more commonplace. The uses for FBC ash are not as well researched and demonstrated and therefore the marketing opportunities for FBC ash continue to require development. FBC boiler owners and operators must be willing to accept the challenges posed in developing these reuse applications for FBC ash for the market to accept the applications for FBC ash and allow the full value of the FBC ash to be realized.

Fitzgerald, H.B. [ReUse Technology, Inc., Kennesaw, GA (United States)

1996-12-31T23:59:59.000Z

486

Insights into Conventional and Low Temperature Diesel Combustion Using Combustion Trajectory Prediction Model  

E-Print Network [OSTI]

.................................................. 61 4.2.1 Rail pressure sweep ...................................................................................... 61 4.2.2 Exhaust gas recirculation sweep ................................................................... 66 4.3 Low temperature... combustion trajectory analysis............................................. 71 4.3.1 Rail pressure sweep ...................................................................................... 71 4.3.2 Exhaust gas recirculation sweep...

Bittle, Joshua A

2014-04-18T23:59:59.000Z

487

Fresh Way to Cut Combustion, Crop and Air Heating Costs Avoids Million BTU Purchases: Inventions and Innovation Combustion Success Story  

SciTech Connect (OSTI)

Success story written for the Inventions and Innovation Program about a new space heating method that uses solar energy to heat incoming combustion, crop, and ventilation air.

Wogsland, J.

2001-01-17T23:59:59.000Z

488

Classical combustion diagnostics for engine research  

SciTech Connect (OSTI)

The use of engine diagnostic techniques in research on the reciprocating internal combustion engine has contributed substantially to engine progress over the years. Many of these techniques were developed before the advent of the laser, and most engine research still uses these classical methods. This paper provides historical snapshots of efforts to understand flame propagation and knock in homogeneous-charge engines, and fuel-air mixing and some of its ramifications in diesels. Such a review demonstrates the accomplishments facilitated by measurement of pressure, temperature, fluid motions, and chemistry within the cylinder. A critique of these classical diagnostics is then offered.

Amann, C.A.

1985-01-01T23:59:59.000Z

489

Studies of combustion kinetics and mechanisms  

SciTech Connect (OSTI)

The objective of the current research is to gain new quantitative knowledge of the kinetics and mechanisms of polyatomic free radicals which are important in hydrocarbon combustion processes. The special facility designed and built for these (which includes a heatable tubular reactor coupled to a photoionization mass spectrometer) is continually being improved. Where possible, these experimental studies are coupled with theoretical ones, sometimes conducted in collaboration with others, to obtain an improved understanding of the factors determining reactivity. The decomposition of acetyl radicals, isopropyl radicals, and n-propyl radicals have been studied as well as the oxidation of methylpropargyl radicals.

Gutman, D. [Catholic Univ. of America, Washington, DC (United States)

1993-12-01T23:59:59.000Z

490

Second-generation pressurized fluidized bed combustion  

SciTech Connect (OSTI)

Under the sponsorship of the United States Department of Energy, Foster Wheeler Corporation is developing second-generation pressurized fluidized bed combustion (PFBC) power plant technology that will enable this type of plant to operate with net plant efficiencies in the range of 43 to 46 percent (based on the higher heating value of the coal), with a reduction in the cost of electricity of at least 20 percent. A three-phase program is under way. Its scope encompasses the conceptual design of a commercial plant through the process of gathering needed experimental test data to obtain design parameters.

Wolowodiuk, W.; Robertson, A.

1992-01-01T23:59:59.000Z

491

Second-generation pressurized fluidized bed combustion  

SciTech Connect (OSTI)

Under the sponsorship of the United States Department of Energy, Foster Wheeler Corporation is developing second-generation pressurized fluidized bed combustion (PFBC) power plant technology that will enable this type of plant to operate with net plant efficiencies in the range of 43 to 46 percent (based on the higher heating value of the coal), with a reduction in the cost of electricity of at least 20 percent. A three-phase program is under way. Its scope encompasses the conceptual design of a commercial plant through the process of gathering needed experimental test data to obtain design parameters.

Wolowodiuk, W.; Robertson, A.

1992-05-01T23:59:59.000Z

492

HIGH PRESSURE COAL COMBUSTION KINETICS PROJECT  

SciTech Connect (OSTI)

SRI has completed the NBFZ test program, made modification to the experimental furnace for the HPBO test. The NBFZ datasets provide the information NEA needs to simulate the combustion and fuel-N conversion with detailed chemical reaction mechanisms. BU has determined a linear swell of 1.55 corresponding to a volumetric increase of a factor of 3.7 and a decrease in char density by the same factor. These results are highly significant, and indicate significantly faster burnout at elevated pressure due to the low char density and large diameter.

Chris Guenther, Ph.D.

2003-01-28T23:59:59.000Z

493

Flow-Assisted Flame Propagation Through a Porous Combustible in Microgravity  

E-Print Network [OSTI]

fuel mass flux. The heat of combustion is constant and knownrespectively, Q is the heat of combustion per unit mass ofvelocities. The heat of combustion is set to the approximate

Bar-Ilan, Amnon; Rich, David B; Rein, Guillermo; Fernandez-Pello, Carlos; Hanai, H.; Niioka, T.

2002-01-01T23:59:59.000Z

494

Dynamic study of coupled heavy hydrocarbon pyrolysis and combustion. N. Gascoina*  

E-Print Network [OSTI]

1/28 Dynamic study of coupled heavy hydrocarbon pyrolysis and combustion. N. Gascoina* , P of the heat transfer dynamics. Finally, the combustion mechanism is applied and validated experimentally for kerosene pyrolysis application. Keywords Regenerative cooling; Hydrocarbon pyrolysis; Supersonic Combustion

Boyer, Edmond

495

Preface to Combustion science. A Theme issue published by The Royal Society.  

Science Journals Connector (OSTI)

...describe time-dependent combustion processes. The 11 papers are grouped...describe time-dependent combustion processes. The 11 papers are grouped...in which the ignition and combustion processes are modelled via averaged...

1999-01-01T23:59:59.000Z

496

幻灯片 1  

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

Coal Combustion Partitioning of inorganic constituents during O 2 /CO 2 combustion and CO 2 mineral sequestration Dr. Junying ZHANG State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China State Key Laboratory Coal Combustion Outline Minerals thermal behavior in oxy-fuel combustion CO 2 sequestration by mineral carbonation State Key Laboratory Coal Combustion 1. O 2 /CO 2 combustion pilot-scale system * Technical parameters: - (1) 0.3MW; - (2) O 2 : 60NM3/h; CO 2 : 240NM3/h * Occupy area:~200M2 * Height:12.5m * Investment:4,000,000¥ State Key Laboratory Coal Combustion  High temperature air combustion  O 2 /CO 2 flue gas recycle  Ca-based sorbents injection desulfurization  low NOx combustion  Multiple dust collecting

497

Mejores y Peores en Ahorro de Combustible  

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

Mejores y Peores MPG Mejores y Peores MPG Los Vehículos Más y Menos Eficientes del 2014 Autos Autos (excluyendo VE) Camiones Camiones (exluyendo VE) Autos 2014 más eficientes en consumo de combustible por clase y tamaño según la EPA (incluye vehículos eléctricos) EPA Clase Descripción del Auto Ahorro de Combustible Combinado Dos-Plazas smart fortwo electric drive convertible smart fortwo electric drive Convertible A-1, 55kw DCPM, Vehículo Eléctrico 107* smart fortwo electric drive coupe smart fortwo electric drive coupe A-1, 55kw DCPM, Vehículo Eléctrico 107* Minicompactos Fiat 500e Fiat 500e A-1, 82 kW AC Induction, Vehículo Eléctrico 116* Subcompactos Chevrolet Spark EV Chevrolet Spark EV A-1, 104 kW ACPM, Vehículo Eléctrico 119* Compactos Ford Focus Electric Ford Focus Electric

498

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

499

Atmospheric and combustion chemistry of dimethyl ether  

SciTech Connect (OSTI)

It has been demonstrated that dimethyl ether (DME) is an ideal diesel fuel alternative. DME, CH{sub 3}OCH{sub 3}, combines good fuel properties with low exhaust emissions and low combustion noise. Large scale production of this fuel can take place using a single step catalytic process converting CH{sub 4} to DME. The fate of DME in the atmosphere has previously been studied. The atmospheric degradation is initiated by the reaction with hydroxyl radicals, which is also a common feature of combustion processes. Spectrokinetic investigations and product analysis were used to demonstrate that the intermediate oxy radical, CH{sub 3}OCH{sub 2}O, exhibits a novel reaction pathway of hydrogen atom ejection. The application of tandem mass spectrometry to chemi-ions based on supersonic molecular beam sampling has recently been demonstrated. The highly reactive ionic intermediates are sampled directly from the flame and identified by collision activation mass spectrometry and ion-molecule reactions. The mass spectrum reflects the distribution of the intermediates in the flame. The atmospheric degradation of DME as well as the unique fuel properties of a oxygen containing compound will be discussed.

Nielsen, O.J.; Egsgaard, H.; Larsen, E.; Sehested, J. [Risoe National Lab., Roskilde (Denmark); Wallington, T.J. [Ford Motor Co., Dearborn, MI (United States)

1997-12-31T23:59:59.000Z

500

Fate of alkalis in coal combustion  

SciTech Connect (OSTI)

The results of these measurements and experiments provide a plausible way to begin an explanation for the distribution of alkali in the ash particulates. To summarize: (1) under typical coal combustion conditions in an atmosphere rich in CO/sub 2/ and/or SO/sub 2/, the alkalis in the organic fraction do not vaporize but remain bound in the ash as stable carbonates or sulfates; (2) the alkalis in the inorganic fraction diffuse to the surface producing enrichment by a factor of about 13 to a depth of about 100A. The results, however, do not provide conclusive evidence about the fate of the alkalis. The effect of water vapor in the combustion stream has not yet been studied. Clearly, water could have an important effect on the vaporization process. Furthermore, the reasoning we have followed to explain the absence of alkali enrichment in the submicron particles requires that the volatilization of the alkalis in both the organic and inorganic fraction not be significant (say less than 20%).

Stewart, G.W. (Aerodyne Research, Inc., Bedford, MA); Stinespring, C.D.; Davidovits, P.

1982-01-01T23:59:59.000Z