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1

5-Year Research Plan on Fine Particulate Matter in the Atmosphere  

NLE Websites -- All DOE Office Websites (Extended Search)

Technology Technology Laboratory Five Year Research Plan on Fine Particulate Matter in the Atmosphere FY2001-FY2005 NETL PM Research Program Ambient Sampling & Analysis Control Technology R&D Source Characterization Predictive Modeling -iii- TABLE OF CONTENTS Page I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 B. Outlook for PM and the Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 II. OVERVIEW OF THE PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 A. Program Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 B. Current Program Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. The Upper Ohio River Valley Project (UORVP) . . . . . . . . . . . . . . . . . . 13

2

Global Chemical Composition of Ambient Fine Particulate Matter for Exposure Assessment  

Science Journals Connector (OSTI)

This is in line with previous findings of high ambient PM2.5 exposure from biofuel burning(47, 48) and in addition to PM2.5 exposure from household air pollution. ... Cao, J.; Xu, H.; Xu, Q.; Chen, B.; Kan, H.Fine particulate matter constituents and cardiopulmonary mortality in a heavily polluted Chinese city Environ. ... Lahore, Pakistan is an emerging megacity that is heavily polluted with high levels of particle air pollution. ...

Sajeev Philip; Randall V. Martin; Aaron van Donkelaar; Jason Wai-Ho Lo; Yuxuan Wang; Dan Chen; Lin Zhang; Prasad S. Kasibhatla; Siwen Wang; Qiang Zhang; Zifeng Lu; David G. Streets; Shabtai Bittman; Douglas J. Macdonald

2014-10-24T23:59:59.000Z

3

Predicting residential indoor concentrations of nitrogen dioxide, fine particulate matter, and elemental carbon using questionnaire and geographic information system based data  

E-Print Network (OSTI)

1 2 3 4 5 6 7 8 9 Predicting residential indoor concentrations of nitrogen dioxide, fine collected indoor and outdoor 3-4 day samples of nitrogen dioxide (NO2) and fine particulate matter (PM2

Paciorek, Chris

4

Effects of Sampling Conditions on the Size Distribution of Fine Particulate Matter Emitted from a Pilot-Scale  

E-Print Network (OSTI)

Effects of Sampling Conditions on the Size Distribution of Fine Particulate Matter Emitted from complex because the dilution ratio influences both the coagulation rate and gas-to- particle conversion because of their ability to scatter and absorb light and also because they act as cloud condensation

Stanier, Charlie

5

Impact of Biomass Combustion on Urban Fine Particulate Matter in Central and Northern Europe  

Science Journals Connector (OSTI)

The impact of biomass combustion on atmospheric particulate matter was investigated at...2.5...) and size-segregated samples were collected with a virtual impactor and a ten-stage Berner low-pressure impactor, re...

Sanna K. Saarikoski; Markus K. Sillanpää…

2008-06-01T23:59:59.000Z

6

Use of sup 14 C-labeled seston to study fine particulate organic matter dynamics in flowing water  

SciTech Connect

Transport, deposition, and resuspension of fine particulate organic matter (FPOM, <1 mm) is an important aspect of the energy dynamics in streams. However, it has been virtually impossible to study these factors because of the difficulty in working with particles of such small sizes. Two papers (Banks and Wolfinbarger 1981 and Wolfinbarger and Crosby 1983) describing methods for labeling marine detritus with {sup 14}C led us to explore these methods for studying FPOM dynamics in flowing water.

Cushing, C.E. (Battelle-Pacific Northwest Laboratory, Richland, WA (USA)); Minshall, G.W. (Idaho State Univ., Pocatello (USA)); Newbold, J.D. (Academy of Natural Sciences of Philadelphia, Avondale, PA (USA))

1990-01-01T23:59:59.000Z

7

Seasonal trends in the composition and ROS activity of fine particulate matter in Baghdad, Iraq  

Science Journals Connector (OSTI)

Abstract Baghdad suffers from severe atmospheric particulate matter (PM) pollution and has limited infrastructure to monitor and control PM-pollution. To help better understand the nature of particulate matter in Baghdad, daily PM2.5 samples were collected every 6th day from September, 2012 to September, 2013. The samples were analyzed for chemical composition and cellular oxidative stress activity using a macrophage-based assay. The annual average PM2.5 concentration was 50 ± 19 ?g m?3, and was comprised of approximately 28% crustal materials, 26% organic carbon (OC), 17% sulfate, 12% elemental carbon (EC), and 8.0% ammonium ion. No clear seasonal trend was observed for the total PM2.5 mass and PM2.5 OC, but EC exhibited higher concentrations in the warmer months, likely due to the extensive use of electric generators operated by diesel and gasoline for cooling. April showed the lowest levels of both EC and OC compared with other months due to both sand and rainstorm events which led to increased deposition and dispersion of local emissions. Concentrations of nitrate ion were low in all seasons due to the high temperatures and low humidity, but slightly higher levels were observed in the cooler months of winter. The oxidative stress (reactive oxygen species (ROS)) activity (59 ± 35 ?g Zymosan equivalents m?3) of the PM was relatively lower than in other studied areas. Association between the water soluble PM constituents and the oxidative activity was investigated using a multi-linear regression model which showed no strong relationships between ROS activity and the water soluble components of PM2.5, but a moderate correlation of water soluble organic carbon from biomass burning (WSOC-BB) was observed (R2 = 0.52). Biomass burning PM has been shown to be an important contributor to ROS activity in other published studies, but additional work is needed to better understand the sources leading to the ROS activity in Baghdad.

Samera Hussein Hamad; Martin Merrill Shafer; Ahmed K.H. Kadhim; Sabah M. Al-Omran; James Jay Schauer

2015-01-01T23:59:59.000Z

8

The Southeastern Aerosol Research and Characterization Study, Part 3: Continuous measurements of fine particulate matter mass and composition  

SciTech Connect

Deployment of continuous analyzers in the Southeastern Aerosol Research and Characterization Study (SEARCH) network began in 1998 and continues today as new technologies are developed. Measurement of fine particulate matter (PM2.5) mass is performed using a dried, 30 {sup o}C tapered element oscillating microbalance (TEOM). TEOM measurements are complemented by observations of light scattering by nephelometry. Measurements of major constituents include: (1) SO{sub 4}{sup 2-} via reduction to SO{sub 2}; (2) NH{sub 4}{sup +} and NO{sub 3}{sup -} via respective catalytic oxidation and reduction to NO, (3) black carbon (BC) by optical absorption,(4) total carbon by combustion to CO{sup 2}, and (5) organic carbon by difference between the latter two measurements. Several illustrative examples of continuous data from the SEARCH network are presented. A distinctive composite annual average diurnal pattern is observed for PM2.5 mass, nitrate, and BC, likely indicating the influence of traffic-related emissions, growth, and break up of the boundary layer and formation of ammonium nitrate. Examination of PM2.5 components indicates the need to better understand the continuous composition of the unmeasured 'other' category, because it contributes a significant fraction to total mass during periods of high PM2.5 loading. Selected episodes are presented to illustrate applications of SEARCH data. An SO{sub 2} conversion rate of 0.2%/hr is derived from an observation of a plume from a coal-fired power plant during early spring, and the importance of local, rural sources of NH{sub 3} to the formation of ammonium nitrate in particulate matter (PM) is demonstrated. 41 refs., 15 figs., 3 tabs.

Edgerton, E.S.; Hartsell, B.E.; Saylor, R.D.; Jansen, J.J.; Hansen, D.A.; Hidy, G.M. [Atmospheric Research & Analysis, Inc., Cary, NC (United States)

2006-09-15T23:59:59.000Z

9

Just the Basics: Particulate Matter  

NLE Websites -- All DOE Office Websites (Extended Search)

is Particulate is Particulate Matter? One of the major components of air pollution is particulate matter, or PM. PM refers to airborne particles that include dust, dirt, soot, smoke, and liquid droplets. These particles can range in size from microscopic to large enough to be seen. PM is characterized by its size, with fine particles of less than 2.5 micrometers in size designated as PM 2.5 and coarser particles between 2.5 and 10 micrometers in size designated as PM 10 . PM arises from many sources, including combustion occurring in factories, power plants, cars, trucks, buses, trains, or wood fires; or through simple agitation of existing particulates by tilling of land, quarrying and stone-crushing, and off- road vehicular movement. Of particular interest is PM generated during diesel

10

Advanced particulate matter control apparatus and methods  

DOE Patents (OSTI)

Apparatus and methods for collection and removal of particulate matter, including fine particulate matter, from a gas stream, comprising a unique combination of high collection efficiency and ultralow pressure drop across the filter. The apparatus and method utilize simultaneous electrostatic precipitation and membrane filtration of a particular pore size, wherein electrostatic collection and filtration occur on the same surface.

Miller, Stanley J. (Grand Forks, ND); Zhuang, Ye (Grand Forks, ND); Almlie, Jay C. (East Grand Forks, MN)

2012-01-10T23:59:59.000Z

11

Evaluation of the Emission, Transport, and Deposition of Mercury, Arsenic, and Fine Particulate Matter From Coal-Based Power Plants in the Ohio River Valley  

NLE Websites -- All DOE Office Websites (Extended Search)

Kevin crist Kevin crist Principal Investigator Ohio University Research and Technology Center Athens, OH 45701 740-593-4751 cristk@ohiou.edu Environmental and Water Resources Evaluation of thE Emission, transport, and dEposition of mErcury, arsEnic, and finE particulatE mattEr from coal-BasEd powEr plants in thE ohio rivEr vallEy rEgion Background The U.S. Department of Energy's National Energy Technology Laboratory (NETL) has established an aggressive research initiative to address the technical and scientific issues surrounding the impact of coal-based power systems on ambient levels of fine particulate matter (PM 2.5 ), nitrogen oxides (NO X ), mercury/air toxics, and acid gases. Regulatory drivers such as the 1990 Clean Air Act Amendments, the 1997 revised National Ambient Air Quality Standards, and the 2005 Clean Air

12

NETL: Ambient Monitoring - Southern Fine Particulate Monitoring Project  

NLE Websites -- All DOE Office Websites (Extended Search)

Southern Fine Particulate Monitoring Project (SRI) Southern Fine Particulate Monitoring Project (SRI) Southern Research Institute (SRI), Birmingham, AL, is operating a research station in North Birmingham for monitoring fine particulate matter (PM2.5) that exists in that part of the Deep South. The station will be a core PM2.5 mass monitoring and chemical speciation station in the nationwide EPA PM2.5 network. As such, it will be a complement and supplement to DOE-NETL's other ongoing projects for monitoring fine particulate matter in the upper Ohio River valley. Locating additional monitoring equipment in the Deep South will fill an important gap in the national particulate monitoring effort. The region's topography, weather patterns, and variety of emission sources may affect the chemical make-up and airborne transport of fine particles in ways that are different than in other parts of the country. The project's results will support DOE's comprehensive program to evaluate ambient fine particulate matter through better understanding of the chemical and physical properties of these materials.

13

Particulate matter dynamics  

E-Print Network (OSTI)

A substantial fraction of the particulate matter released into the atmosphere by industrial or natural processes corresponds to particles whose aerodynamic diameters are greater than 50 mm. It has been shown that, for these particles, the classical description of Gaussian plume diffusion processes, is inadequate to describe the transport and deposition. In this paper we present new results concerning the dispersion of coarse particulate matter. The simulations are done with our own code that uses the Bulirsch Stoer numerical integrator to calculate threedimensional trajectories of particles released into the environment under very general conditions. Turbulent processes are simulated by the Langevin equation and weather conditions are modeled after stable (Monin-Obukhov length L> 0) and unstable conditions (L <0). We present several case studies based on Monte Carlo simulations and discusses the effect of weather on the final deposition of these particles.

Cionco, Rodolfo G; Caligaris, Marta G

2012-01-01T23:59:59.000Z

14

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

SciTech Connect

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2005-04-02T23:59:59.000Z

15

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

SciTech Connect

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley Region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley Region.

Kevin Crist

2003-10-02T23:59:59.000Z

16

Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic from Coal-Based Power Plants in the Ohio River Valley Region  

SciTech Connect

As stated in the proposal: Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg0 and RGM. Approximately 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by the USEPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2006-04-02T23:59:59.000Z

17

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

SciTech Connect

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2004-10-02T23:59:59.000Z

18

Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic from Coal-Based Power Plants in the Ohio River Valley Region  

SciTech Connect

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg0, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2005-10-02T23:59:59.000Z

19

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

SciTech Connect

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc. (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal-fired power plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley Region, operated independently of this project. These sites may include (1) the DOE National Energy Technology Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2004-04-02T23:59:59.000Z

20

Combustor for fine particulate coal  

DOE Patents (OSTI)

A particulate coal combustor with two combustion chambers is provided. The first combustion chamber is toroidal; air and fuel are injected, mixed, circulated and partially combusted. The air to fuel ratio is controlled to avoid production of soot or nitrogen oxides. The mixture is then moved to a second combustion chamber by injection of additional air where combustion is completed and ash removed. Temperature in the second chamber is controlled by cooling and gas mixing. The clean stream of hot gas is then delivered to a prime mover. 4 figs.

Carlson, L.W.

1988-01-26T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Combustor for fine particulate coal  

DOE Patents (OSTI)

A particulate coal combustor with two combustion chambers is provided. The first combustion chamber is toroidal; air and fuel are injected, mixed, circulated and partially combusted. The air to fuel ratio is controlled to avoid production of soot or nitrogen oxides. The mixture is then moved to a second combustion chamber by injection of additional air where combustion is completed and ash removed. Temperature in the second chamber is controlled by cooling and gas mixing. The clean stream of hot gas is then delivered to a prime mover.

Carlson, Larry W. (Oswego, IL)

1988-01-01T23:59:59.000Z

22

COMPARATIVE EVALUATION OF AMBIENT FINE PARTICULATE MATTER (PM2.5)DATA OBTAINED FROM URBAN AND RURAL MONITORING SITES ALONG THE UPPER OHIO RIVER VALLEY  

SciTech Connect

Advanced Technology Systems, Inc. (ATS), with Desert Research Institute (DRI) and Ohio University as subcontractors, was contracted by the NETL in September 1998 to manage the Upper Ohio River Valley Project (UORVP), with a goal of characterizing the ambient fine particulate in this region, including examination of urban/rural variations, correlations between PM{sub 2.5} and gaseous pollutants, and influences of artifacts on PM{sub 2.5} measurements in this region. Two urban and two rural monitoring sites were included in the UORVP. The four sites selected were all part of existing local and/or state air quality programs. One urban site was located in the Lawrenceville section of Pittsburgh, Pennsylvania at an air quality monitoring station operated by the Allegheny County Health Department. A second urban site was collocated at a West Virginia Division of Environmental Protection (WVDEP) monitoring station at the airport in Morgantown, West Virginia. One rural site was collocated with the Pennsylvania Department of Environmental Protection (PADEP) at a former NARSTO-Northeast site near Holbrook, Greene County, Pennsylvania. The other rural site was collocated at a site operated by the Ohio Environmental Protection Agency (OHEPA) and managed by the Ohio State Forestry Division in Gifford State Forest near Athens, Ohio. Analysis of data collected to date show that: (1) the median mass and composition of PM{sub 2.5} are similar for both Lawrenceville and Holbrook, suggesting that the sites are impacted more by the regional than by local effects; (2) there was no significant differences in the particulate trending and levels observed at both sites within seasons; (3) sulfate levels predominate at both sites, and (4) PM{sub 2.5} and PM{sub 10} mass concentration levels are consistently higher in summer than in winter, with intermediate levels being observed in the fall and spring. Data analysis focusing on relating the aerometric measurements to local and regional scale emissions of sources of primary and secondary fine particles using receptor-based air quality models will follow.

Robinson P. Khosah; John P. Shimshock

2003-04-30T23:59:59.000Z

23

Reduction of Transient Particulate Matter Spikes with Decision...  

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

Transient Particulate Matter Spikes with Decision Tree Based Control Reduction of Transient Particulate Matter Spikes with Decision Tree Based Control Using a non-parametric...

24

Probing into regional ozone and particulate matter pollution in the United States  

E-Print Network (OSTI)

) and fine particulate matter (PM2.5) air pollution and associated health effects have been one of the majorProbing into regional ozone and particulate matter pollution in the United States: 1. A 1 year CMAQ-term simulations using the Community Multiscale Air Quality (CMAQ) modeling system and subsequent process analyses

Jacobson, Mark

25

Particulate matter in the south Atlantic Ocean  

E-Print Network (OSTI)

The particulate matter (PM) distribution in the south Atlantic Ocean and its relationship to water masses and currents were determined from optical and hydrographic data. Attenuation coefficients were obtained by interfacing a beam transmissometer...

Wood, Megan Maria

2012-06-07T23:59:59.000Z

26

Investigation of Direct Injection Vehicle Particulate Matter...  

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

Emissions This study focuses primarily on particulate matter mass analysis of a gasoline direct injection engine in a test cell with a chassis dynamometer. p-10gibbs.pdf...

27

Optical Backscatter Probe for Sensing Particulate Matter - Energy...  

NLE Websites -- All DOE Office Websites (Extended Search)

particulate concentration is then determined by measuring the amount of backscattered light transmitted by particulate matter contained in a sample of engine exhaust. The speed...

28

Occupational Medicine Implications of Engineered Nanoscale Particulate Matter  

E-Print Network (OSTI)

Safety in Nanotechnology Research Occupational Medicinenanotechnology revolution promises dramatic advancements in science, technology, medicineMedicine Implications of Engineered Nanoscale Particulate Matter The emerging nanotechnology

Kelly, Richard J.

2008-01-01T23:59:59.000Z

29

Method for removing particulate matter from a gas stream  

DOE Patents (OSTI)

Particulate matter is removed from a stream of pressurized gas by directing the stream of gas upwardly through a bed of porous material, the porous bed being held in an open ended container and at least partially submerged in liquid. The passage of the gas through the porous bed sets up a circulation in the liquid which cleans the particulate matter from the bed.

Postma, Arlin K. (Benton City, WA)

1984-01-01T23:59:59.000Z

30

E-Print Network 3.0 - ambient particulate matter Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

ambient particulate matter Page: << < 1 2 3 4 5 > >> 1 Statistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter Summary: Ambient Air Quality Standards...

31

E-Print Network 3.0 - ambient particulate matter-induced Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

particulate matter-induced Page: << < 1 2 3 4 5 > >> 1 Statistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter Summary: Ambient Air Quality Standards...

32

Mechanisms governing fine particulate emissions from coal flames  

SciTech Connect

The primary objective of this program was to provide a basic understanding of the principal processes that govern the formation of particulate matter in the 0.5--10 {mu}m size range in pulverized coal flames. The mechanism that produces ash particles in this size range is not clear. Particle sizes smaller than the 0.5--10 {mu}m size range are generally accepted to result from a vaporization/condensation mechanism while particles larger than this size result from the coalescence of ash in coal particles which may breakup as they burn. This program combined experimental and theoretical studies to understand the mechanisms which control the production of ash in the 0.5--10 {mu}m size range. (VC)

Newton, G.H.; Schieber, C.; Socha, R.G.; Kramlich, J.C.

1990-04-01T23:59:59.000Z

33

Mechanisms governing fine particulate emissions from coal flames. Final report  

SciTech Connect

The primary objective of this program was to provide a basic understanding of the principal processes that govern the formation of particulate matter in the 0.5--10 {mu}m size range in pulverized coal flames. The mechanism that produces ash particles in this size range is not clear. Particle sizes smaller than the 0.5--10 {mu}m size range are generally accepted to result from a vaporization/condensation mechanism while particles larger than this size result from the coalescence of ash in coal particles which may breakup as they burn. This program combined experimental and theoretical studies to understand the mechanisms which control the production of ash in the 0.5--10 {mu}m size range. (VC)

Newton, G.H.; Schieber, C.; Socha, R.G.; Kramlich, J.C.

1990-04-01T23:59:59.000Z

34

E-Print Network 3.0 - airborne fine particulate Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

particulate matter otherwise known as aerosols. However health risks from these pollutants... Airborne Pollution In urban environments What are the real health effects of...

35

E-Print Network 3.0 - atmospheric fine particulate Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

and characterizing the diversity of particulate matter produced from fossil fuel and biomass burn combustion... studies on the mixing state of atmospheric particles and their...

36

Microscopy investigations of ash and particulate matter accumulation in diesel particulate filter surface pores  

E-Print Network (OSTI)

There has been increased focus on the environmental impact of automobile emissions in recent years. These environmental concerns have resulted in the creation of more stringent particulate matter emissions regulations in ...

Beauboeuf, Daniel P

2010-01-01T23:59:59.000Z

37

Engineering analysis of fugitive particulate matter emissions from cattle feedyards  

E-Print Network (OSTI)

An engineering analysis of the fugitive particulate matter emissions from a feedyard is not simple. The presence of an evening dust peak in concentration measurements downwind of a feedyard complicates the calculation of an average 24-h emission...

Hamm, Lee Bradford

2006-04-12T23:59:59.000Z

38

REVIEW OF DIESEL PARTICULATE MATTER SAMPLING METHODS Supplemental Report # 2  

E-Print Network (OSTI)

Arnold University of Minnesota Department of Mechanical Engineering Center for Diesel Research aerosol. This report focuses on the fundamental chemical and physical processes that affect diesel aerosolREVIEW OF DIESEL PARTICULATE MATTER SAMPLING METHODS Supplemental Report # 2 AEROSOL DYMAMICS

Minnesota, University of

39

Contribution of organic carbon to wood smoke particulate matter absorption  

NLE Websites -- All DOE Office Websites (Extended Search)

Contribution of organic carbon to wood smoke particulate matter absorption Contribution of organic carbon to wood smoke particulate matter absorption of solar radiation Title Contribution of organic carbon to wood smoke particulate matter absorption of solar radiation Publication Type Journal Article Year of Publication 2012 Authors Kirchstetter, Thomas W., and Tracy L. Thatcher Journal Atmospheric Chemistry and Physics Volume 12 Pagination 6067-6072 Abstract A spectroscopic analysis of 115 wintertime partic- ulate matter samples collected in rural California shows that wood smoke absorbs solar radiation with a strong spectral se- lectivity. This is consistent with prior work that has demon- strated that organic carbon (OC), in addition to black car- bon (BC), appreciably absorbs solar radiation in the visible and ultraviolet spectral regions. We apportion light absorp-

40

Reduction of particulate matter and gaseous emission from marine diesel engines using a catalyzed particulate filter  

Science Journals Connector (OSTI)

Diesel engines are used widely as the power sources of coastal ships and international vessels primarily due to their high thermal efficiency, high fuel economy and durable performance. However, the gaseous and solid substances exhausted from diesel engines during the combustion process cause air pollution, in particular around harbor regions. In order to effectively reduce particulate matter and gaseous pollution emissions, a catalyzed particulate filter was equipped in the tail pipe of a marine diesel engine. The engine's performance and emission characteristics under various engine speeds and torques were measured using a computerized engine data control and acquisition system accompanied with an engine dynamometer. The effectiveness of installing a catalyzed particulate filter on the reduction of pollutant emissions was examined. The experimental results show that the exhaust gas temperature, carbon monoxide and smoke opacity were reduced significantly upon installation of the particulate filter. In particular, larger conversion of carbon monoxide to carbon dioxide — and thus larger CO2 and lower CO emissions — were observed for the marine diesel engine equipped with a catalyzed particulate filter and operated at higher engine speeds. This is presumably due to enhancement of the catalytic oxidation reaction that results from an exhaust gas with stronger stirring motion passing through the filter. The absorption of partial heating energy from the exhaust gas by the physical structure of the particulate filter resulted in a reduction in the exhaust gas temperature. The particulate matter could be burnt to a greater extent due to the effect of the catalyst coated on the surface of the particulate filter. Moreover, the fuel consumption rate was increased slightly while the excess oxygen emission was somewhat decreased with the particulate filter.

Cherng-Yuan Lin

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

REVIEW OF DIESEL PARTICULATE MATTER SAMPLING METHODS Supplemental Report # 1  

E-Print Network (OSTI)

.D. and Megan Arnold University of Minnesota Department of Mechanical Engineering Center for Diesel Research obtained from engine laboratory visits and present results from a diesel aerosol sampling questionnaireREVIEW OF DIESEL PARTICULATE MATTER SAMPLING METHODS Supplemental Report # 1 DIESEL EXHAUST

Minnesota, University of

42

Particulate matter as an amplifier for astronomical light pollution  

Science Journals Connector (OSTI)

......increased emission of particulate matter in the winter, mainly from coal-fired home heating systems (so-called low emission...Nielsen C. P., eds. Clearing the Air: The Health and Economic Damages of Air Pollution in China (2007) Cambridge, MA......

T. ?ci?zor; M. Kubala

2014-01-01T23:59:59.000Z

43

On-Board Engine Exhaust Particulate Matter Sensor for HCCI and...  

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

Matter Sensor for Both Engine-Out and Post-DPF Exhaust Monitoring On-Board Engine Exhaust Particulate Matter Sensor for HCCI and Conventional Diesel Engines Vehicle...

44

Biodiesel Fuel Property Effects on Particulate Matter Reactivity  

SciTech Connect

Controlling diesel particulate emissions to meet the 2007 U.S. standard requires the use of a diesel particulate filter (DPF). The reactivity of soot, or the carbon fraction of particulate matter, in the DPF and the kinetics of soot oxidation are important in achieving better control of aftertreatment devices. Studies showed that biodiesel in the fuel can increase soot reactivity. This study therefore investigated which biodiesel fuel properties impact reactivity. Three fuel properties of interest included fuel oxygen content and functionality, fuel aromatic content, and the presence of alkali metals. To determine fuel effects on soot reactivity, the performance of a catalyzed DPF was measured with different test fuels through engine testing and thermo-gravimetric analysis. Results showed no dependence on the aromatic content or the presence of alkali metals in the fuel. The presence and form of fuel oxygen was the dominant contributor to faster DPF regeneration times and soot reactivity.

Williams, A.; Black, S.; McCormick, R. L.

2010-06-01T23:59:59.000Z

45

Characterization of ambient particulate matter in the Paso del Norte region  

SciTech Connect

Air pollution in the Paso del Norte region, where West Texas abuts the southern boundary of New Mexico and the northern boundary of Chihuahua, Mexico is a common concern to the residents on both sides of the border. Parts of the region fail to meet the US and Mexican Ambient Air Quality Standards for particulate matter, ozone, and carbon monoxide. The regional air pollution problem is complicated due to arid climate, complex terrain topography, frequently occurring temperature inversions, extensive unpaved urban areas, an aging and poorly maintained vehicle fleet, and a number of other uncontrolled anthropogenic emission sources. The issue is further complicated by concerns arising from recent scientific evidence of the health effects associated with exposures to fine particulate matter. A study designed to address particulate matter (PM) air pollution problems in the region is currently undertaken by researchers from member universities of the Southwest Center for Environmental Research and Policy and several governmental agencies. The study attempts to (1) characterize the fine fraction of PM; (2) identify and characterize the major regional emission sources; (3) apportion the fine fraction of PM to the source emissions; and (4) establish a regional technological information clearinghouse. The short-term goal of this research is to initiate a research program to characterize, identify, and quantify the sources and nature of the PM in the region. The long-term goal of this study is to establish regional research capabilities to continue air quality monitoring, evaluation, modeling, and control after the implementation of the study. A scoping study to collect regional PM was conducted in December 1998.

Li, W.W.; Currey, R.M.; Valenzuela, V.H.; Meuzelaar, H.L.C.; Sheya, S.A.; Anderson, J.R.; Banerjee, S.; Griffin, J.B.

1999-07-01T23:59:59.000Z

46

Source Apportionment of Airborne Particulate Matter using Inorganic and  

NLE Websites -- All DOE Office Websites (Extended Search)

Source Apportionment of Airborne Particulate Matter using Inorganic and Source Apportionment of Airborne Particulate Matter using Inorganic and Organic Species as Tracers Title Source Apportionment of Airborne Particulate Matter using Inorganic and Organic Species as Tracers Publication Type Journal Article Year of Publication 2012 Authors Wang, Yungang, Philip K. Hopke, X. Xia, Oliver V. Rattigan, David C. Chalupa, and M. J. Source Journal Atmospheric Environment Volume 55 Start Page 525 Pagination 525-532 Date Published 01/2012 Keywords source apportionment positive matrix factorization (pmf) particulate matter (pm) molecular markers (mm) aethalometer delta-c Abstract Source apportionment is typically performed on chemical composition data derived from particulate matter (PM) samples. However, many common sources no longer emit significant amounts of characteristic trace elements requiring the use of more comprehensive chemical characterization in order to fully resolve the PM sources. Positive matrix factorization (EPA PMF, version 4.1) was used to analyze 24-hr integrated molecular marker (MM), secondary inorganic ions, trace elements, carbonaceous species and light absorption data to investigate sources of PM2.5 in Rochester, New York between October 2009 and October 2010 to explore the role of specific MMs. An eight-factor solutionwas found for which the factors were identified as isoprene secondary organic aerosol (SOA), airborne soil, other SOA, diesel emissions, secondary sulfate, wood combustion, gasoline vehicle, and secondary nitrate contributing 6.9%, 12.8%, 3.7%, 7.8%, 45.5%, 9.1%, 7.9%, and 6.3% to the average PM2.5 concentration, respectively Concentrations of pentacosane, hexacosane, heptacosane, and octacosane in the gasoline vehicles factor were larger compared to diesel emissions. Aethalometer Delta-C was strongly associated with wood combustion. The compounds, n-heptacosanoic acid and n-octacosanoic acid, occasionally used in the past as tracers for road dust, were found to largely associate with SOA in this study. In comparison with a standard PMF analyses without MM, inclusion of themwas necessary to resolve SOA and wood combustion factors in urban areas.

47

Toward Distinguishing Woodsmoke and Diesel Exhaust in Ambient Particulate Matter  

SciTech Connect

Particulate matter (PM) from biomass burning and diesel exhaust has distinct X-ray spectroscopic, carbon specific signatures, which can be employed for source apportionment. Characterization of the functional groups of a wide selection of PM samples (woodsmoke, diesel soot, urban air PM) was carried out using the soft X-ray spectroscopy capabilities at the synchrotron radiation sources in Berkeley (ALS) and Brookhaven (NSLS). The spectra reveal that diesel exhaust particulate (DEP) matter is made up from a semigraphitic solid core and soluble organic matter, predominantly with carboxylic functional groups. Woodsmoke PM has no or a less prevalent, graphitic signature, instead it contains carbon-hydroxyl groups. Using these features to apportion the carbonaceous PM in ambient samples we estimate that the relative contribution of DEP to ambient PM in an urban area such as Lexington, KY and St. Louis, MO is 7% and 13.5%, respectively. These values are comparable to dispersion modeling data from nonurban and urban areas in California, and with elemental carbon measurements in urban locations such as Boston, MA, Rochester, NY, and Washington, DC.

Braun,A.; Huggins, F.; Kubatova, A.; Wirick, S.; Maricq, M.; Mun, B.; McDonald, J.; Kelly, K.; Shah, N.; Huffman, G.

2008-01-01T23:59:59.000Z

48

Impact of Filtration Velocities and Particulate Matter Characteristics on Diesel Particulate Filter Wall Loading Performance  

SciTech Connect

The impact of different types of diesel particulate matter (PM) and different sampling conditions on the wall deposition and early soot cake build up within diesel particulate filters has been investigated. The measurements were made possible by a newly developed Diesel Exhaust Filtration Analysis (DEFA) system in which in-situ diesel exhaust filtration can be reproduced with in small cordierite wafer disks, which are essentially thin sections of a Diesel Particulate Filter (DPF) wall. The different types of PM were generated from selected engine operating conditions of a single-cylinder heavy-duty diesel engine. Two filtration velocities 4 and 8 cm/s were used to investigate PM deep-bed filtration processes. The loaded wafers were then analyzed in a thermal mass analyzer that measures the Soluble Organic Fraction (SOF) as well as soot and sulfate fractions of the PM. In addition, the soot residing in the wall of the wafer was examined under an optical microscope illuminated with Ultraviolet light and an Environmental Scanning Electron Microscope (E-SEM) to determine the bulk soot penetration depth for each loading condition. It was found that higher filtration velocity results in higher wall loading with approximately the same penetration depth into the wall. PM characteristics impacted both wall loading and soot cake layer characteristics. Results from imaging analysis indicate that soot the penetration depth into the wall was affected more by PM size (which changes with engine operating conditions) rather than filtration velocity.

Lance, Michael J [ORNL; Walker, Larry R [ORNL; Yapaulo, Renato A [ORNL; Orita, Tetsuo [ORNL; Wirojsakunchai, Ekathai [University of Wisconsin; Foster, David [University of Wisconsin; Akard, Michael [Horiba Instruments Inc.

2009-01-01T23:59:59.000Z

49

Apparatus for removal of particulate matter from gas streams  

DOE Patents (OSTI)

An apparatus for the removal of particulate matter from the gaseous product stream of an entrained flow coal gasifier which apparatus includes an initial screen, an intermediate screen which is aligned with the direction of flow of the gaseous product stream and a final screen transversely disposed to the flow of gaseous product and which apparatus is capable of withstanding at least a pressure differential of about 10 psi (68.95 kPa) or greater at the temperatures of the gaseous product stream.

Smith, Peyton L. (Baton Rouge, LA); Morse, John C. (Baton Rouge, LA)

2000-01-01T23:59:59.000Z

50

On-Board Engine Exhaust Particulate Matter Sensor for HCCI and...  

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

Demonstration of an Electronic Particulate Matter Sensor for Both Engine-Out and Post-DPF Exhaust Monitoring Particle Sensor for Diesel Combustion Monitoring NOx sensor development...

51

E-Print Network 3.0 - air particulate matter Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Collection: Engineering ; Renewable Energy 3 Statistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter Summary: Statistical Issues in the...

52

Development of a Low-Cost Particulate Matter Monitor  

E-Print Network (OSTI)

Forward-looking infrared (FLIR) images taken as a singleforward-looking infrared (FLIR) instrumentation. Particulate

White, Richard M.

2010-01-01T23:59:59.000Z

53

An Optical Backscatter Sensor for Particulate Matter Measurement  

SciTech Connect

Diesel engines are prone to emit particulate matter (PM) emissions under certain operation conditions. In-cylinder production of PM from diesel combustion control can occur under a wide variety of operating conditions, and in some cases, operation of a multi-cylinder engine can further complicate PM emissions due to variations in air or fuel charge due to manifold mixing effects. In this study, a probe for detecting PM in diesel exhaust was evaluated on a light-duty diesel engine. The probe is based on an optical backscattering effect. Due to the optical nature of the probe, PM sensing can occur at high rates. The feasibility of the probe for examining PM emissions in the exhaust manifold will be discussed.

Parks, II, James E [ORNL; Prikhodko, Vitaly Y [ORNL; Partridge Jr, William P [ORNL

2009-01-01T23:59:59.000Z

54

Exposure information in environmental health research: Current opportunities and future directions for particulate matter, ozone, and toxic air pollutants  

E-Print Network (OSTI)

fine particulates and nitrogen dioxide in the elderly withS.and Jerrett M. Nitrogen dioxide prediction in Southernto particles and nitrogen dioxide in Santiago, Chile.

McKone, Thomas E.

2008-01-01T23:59:59.000Z

55

Particulate matter and heart disease: Evidence from epidemiological studies  

SciTech Connect

The association between particulate matter and heart disease was noted in the mid-nineties of last century when the epidemiological evidence for an association between air pollution and hospital admissions due to cardiovascular disease accumulated and first hypotheses regarding the pathomechanism were formulated. Nowadays, epidemiological studies have demonstrated coherent associations between daily changes in concentrations of ambient particles and cardiovascular disease mortality, hospital admission, disease exacerbation in patients with cardiovascular disease and early physiological responses in healthy individuals consistent with a risk factor profile deterioration. In addition, evidence was found that annual average PM{sub 2.5} exposures are associated with increased risks for mortality caused by ischemic heart disease and dysrhythmia. Thereby, evidence is suggesting not only a short-term exacerbation of cardiovascular disease by ambient particle concentrations but also a potential role of particles in defining patients' vulnerability to acute coronary events. While this concept is consistent with the current understanding of the factors defining patients' vulnerability, the mechanisms and the time-scales on which the particle-induced vulnerability might operate are unknown.

Peters, Annette [GSF-National Research Center for Environment and Health, Institute of Epidemiology, Ingolstaedter Landstr. 1, 85764 Neuherberg (Germany)]. E-mail: peters@gsf.de

2005-09-01T23:59:59.000Z

56

E-Print Network 3.0 - airborne particulate matter Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

<< < 1 2 3 4 5 > >> 1 Correlating Bioaerosol Load with PM2.5 and PM10 Concentrations Jordan Peccia1, Ann M. Dillner1,2, Justin Boreson1 Summary: of airborne particulate matter....

57

Errors associated with particulate matter measurements on rural sources: appropriate basis for regulating cotton gins  

E-Print Network (OSTI)

Agricultural operations across the United States are encountering difficulties complying with current air pollution regulations for particulate matter (PM). PM is currently regulated in terms of particle diameters less than or equal to a nominal 10...

Buser, Michael Dean

2004-09-30T23:59:59.000Z

58

Currents and suspended particulate matter in tidal channels of the Sylt-Rřmř basin  

Science Journals Connector (OSTI)

Measurements of fluxes of water and suspended particulate matter (SPM) through the inlet and the three major channels of the Sylt-Rřmř bight covering several tidal periods in August 1992 ... budgets a relationshi...

Jens Kappenberg; Hans-Ulrich Fanger; Agmar Müller

59

Source Apportionment of Heavy Metals in Air Particulate Matter Using Automated Electron Probe Micro Analysis  

Science Journals Connector (OSTI)

Source apportionment of air particulate matter, using receptor ... not well adapted for situations with a complex source composition because of the inherent inability to resolve chemically equivalent sources. Alt...

W. Van Borm; F. Adams

1988-01-01T23:59:59.000Z

60

Occurrence of Aliphatic Hydrocarbons in Water, Suspended Particulate Matter and Sediments of Daliao River System, China  

Science Journals Connector (OSTI)

In August of 2005 a study was carried out to evaluate contamination of aliphatic hydrocarbons(AHc) in water, suspended particulate matter (SPM) and sediments...?1 in surface water, from 22.68 to 5,725.36...?1 in ...

W. Guo; M. C. He; Z. F. Yang; C. Y. Lin…

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

DEVELOPMENT OF FINE PARTICULATE EMISSION FACTORS AND SPECIATION PROFILES FOR OIL AND GAS-FIRED COMBUSTION SYSTEMS  

SciTech Connect

In 1997, the United States Environmental Protection Agency (EPA) promulgated new National Ambient Air Quality Standards (NAAQS) for particulate matter, including for the first time particles with aerodynamic diameter smaller than 2.5 micrometers ({micro}m) referred to as PM2.5. PM2.5 in the atmosphere also contributes to reduced atmospheric visibility, which is the subject of existing rules for siting emission sources near Class 1 areas and new Regional Haze rules. There are few existing data regarding emissions and characteristics of fine aerosols from oil, gas and power generation industry combustion sources, and the information that is available is generally outdated and incomplete. Traditional stationary source air emission sampling methods tend to underestimate or overestimate the contribution of the source to ambient aerosols because they do not properly account for primary aerosol formation, which occurs after the gases leave the stack. Primary aerosol includes both filterable particles that are solid or liquid aerosols at stack temperature plus those that form as the stack gases cool through mixing and dilution processes in the plume downwind of the source. These deficiencies in the current methods can have significant impacts on regulatory decision-making. PM2.5 measurement issues were extensively reviewed by the American Petroleum Institute (API) (England et al., 1998), and it was concluded that dilution sampling techniques are more appropriate for obtaining a representative particulate matter sample from combustion systems for determining PM2.5 emission rate and chemical speciation. Dilution sampling is intended to collect aerosols including those that condense and/or react to form solid or liquid aerosols as the exhaust plume mixes and cools to near-ambient temperature immediately after the stack discharge. These techniques have been widely used in recent research studies. For example, Hildemann et al. (1994) and McDonald et al. (1998) used filtered ambient air to dilute the stack gas sample followed by 80-90 seconds residence time to allow aerosol formation and growth to stabilize prior to sample collection and analysis. More accurate and complete emissions data generated using the methods developed in this program will enable more accurate source-receptor and source apportionment analysis for PM2.5 National Ambient Air Quality Standards (NAAQS) implementation and streamline the environmental assessment of oil, gas and power production facilities. The overall goals of this program were to: (1) Develop improved dilution sampling technology and test methods for PM2.5 mass emissions and speciation measurements, and compare results obtained with dilution and traditional stationary source sampling methods. (2) Develop emission factors and speciation profiles for emissions of fine particulate matter, especially organic aerosols, for use in source-receptor and source apportionment analyses. (3) Identify and characterize PM2.5 precursor compound emissions that can be used in source-receptor and source apportionment analyses.

Glenn C. England

2004-10-20T23:59:59.000Z

62

Technical comments on EPA`s proposed revisions to the National Ambient Air Quality Standard for particulate matter  

SciTech Connect

The US Environmental Protection Agency (EPA) has proposed new ambient air quality standards specifically for fine particulate matter, regulating concentrations of particles with median aerodynamic diameters less than 2.5 {mu}m (PM{sub 2.5}). Two new standards have been proposed: a maximum 24-hr concentration that is intended to protect against acute health effects, and an annual concentration limit that is intended to protect against longer-term health effects. EPA has also proposed a slight relaxation of the 24-hr standard for inhalable particles (PM{sub 10}), by allowing additional exceedances each year. Fine particles are currently being indirectly controlled by means of regulations for PM{sub 10} and TSP, under the Clean Air Act of 1970 and subsequent amendments. Although routine monitoring of PM{sub 2.5} is rare and data are sparse, the available data indicate that ambient concentrations have been declining at about 6% per year under existing regulations.

Lipfert, F.W.

1997-03-01T23:59:59.000Z

63

Characterization of Particulate Matter Emissions from a Common-Rail Diesel Engine  

Science Journals Connector (OSTI)

Department of Materials Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy ... The preferred approach to control the emissions of diesel engines is the adoption of an exhaust gas recirculation (EGR) system followed by a diesel oxidation catalyst (DOC) in front of a diesel particulate filter (DPF). ... Some fundamental information on the particulate matter (PM) characteristics emitted by an automotive diesel engine was gathered in order to provide a precious tool for the knowledge-based design of a new generation of diesel particulate traps in the EURO VI regulation perspective. ...

D. Fino; N. Russo

2011-02-02T23:59:59.000Z

64

Removal of residual particulate matter from filter media  

DOE Patents (OSTI)

A method for removing residual filter cakes that remain adhered to a filter after typical particulate removal methodologies have been employed, such as pulse-jet filter element cleaning, for all cleanable filters used for air pollution control, dust control, or powder control.

Almlie, Jay C; Miller, Stanley J

2014-11-11T23:59:59.000Z

65

Study on the Respirable Particulate Matter Generated from the Petroleum Coke and Coal Mixed-Fired CFB Boiler  

Science Journals Connector (OSTI)

The dust generated from the fuel combustion is one of the important sources for air pollution. This paper has made a comprehensive research on the particulate matter generated from the petroleum coke and coal mixed-fired circulating fluidized bed (CFB) ... Keywords: petroleum coke, respirable particulate matter, air pollution, circulating fluidized bed boiler

Yan Ma; Hao Bai; Lihua Zhao; Yang Ma; Daqiang Cang

2010-12-01T23:59:59.000Z

66

Gravitation, the 'Dark Matter' Effect and the Fine Structure Constant  

E-Print Network (OSTI)

Gravitational anomalies such as the mine/borehole g anomaly, the near-flatness of the spiral galaxy rotation-velocity curves, currently interpreted as a `dark matter' effect, the absence of that effect in ordinary elliptical galaxies, and the ongoing problems in accurately determining Newton's gravitational constant G_N are explained by a generalisation of the Newtonian theory of gravity to a fluid-flow formalism with one new dimensionless constant. By analysing the borehole data this constant is shown to be the fine structure constant alpha=1/137. The spiral galaxy `dark matter' effect and the globular cluster `black hole' masses are then correctly predicted. This formalism also explains the cause of the long-standing uncertainties in G_N and leads to the introduction of a fundamental gravitational constant G not = G_N with value G=(6.6526 +/- 0.013)x 10^-11 m^3s^{-2}kg^{-1}. The occurrence of alpha implies that space has a quantum structure, and we have the first evidence of quantum gravity effects.

Reginald T. Cahill

2005-04-07T23:59:59.000Z

67

An Overview of Particulate Matter and its Cost-efficient Evaluation  

E-Print Network (OSTI)

portion of which is in the form of silica[45]. In an experiment examining the relative acute effects of inhalation of nitrates, sulfates, and coarse particles (produced by resuspending road dust) in the lungs of rats, Kleinman et al. [46] found... following intratracheal instillation of fine and ultra fine carbon black in rats [J]. Inhal. Toxicol, 1999, 12: 709 - 731 [38] Li, X. Y., Gilmour, and et al.. Free radical activity and pro-inflammatory effects of particulate air pollution (PM10) in vivo...

Zhang, F.; Zhang, G.; Zhang, Q.

2006-01-01T23:59:59.000Z

68

Modeling water column structure and suspended particulate matter on the Middle Atlantic continental shelf  

E-Print Network (OSTI)

that contributed to the evolution of observed thermal structure and resuspension of particulate matter during resuspension processes. It is concluded that wave-current bottom shear stress was clearly the most important process for sediment resuspension during and following both hurricanes. Discrepancies between modeled

Chang, Grace C.

69

Deposition, resuspension, and decomposition of particulate organic matter in the sediments of Lake Itasca, Minnesota, USA  

Science Journals Connector (OSTI)

Sediment traps were used to investigate the settling, resuspension, and decomposition of particulate organic matter in...?2 d?1 at 4 m and increased to 2.1 to 3.2 g m?2 d?1 two meters above the bottom sediment in...

Randall E. Hicks; Christopher J. Owen; Peter Aas

1994-05-13T23:59:59.000Z

70

Back-Trajectory Analysis and Source-Receptor Relationships: Particulate Matter and Nitrogen Isotopic Composition in  

E-Print Network (OSTI)

. The chemical components of these acids, including nitrogen oxides (NOx nitric acid [NO] nitrogen dioxide [NO2Back-Trajectory Analysis and Source-Receptor Relationships: Particulate Matter and Nitrogen- search suggests that this agricultural presence emits a significant portion of the state's nitrogen (i

Niyogi, Dev

71

Source apportionment of time-and size-resolved ambient particulate matter , Philip K. Hopke b,  

E-Print Network (OSTI)

International Airport were analyzed for the elemental composition using synchrotron X-ray fluorescence Airport emission sources Size- and time-resolved particulate matter samples collected using eight-stage Davis Rotating-drum Universal- size-cut Monitoring (DRUM) impactors at the Washington-Dulles

Navasca, Carmeliza

72

Particulate Matter Science for Policy Makers: A NARSTO Assessment is a concise and  

E-Print Network (OSTI)

Shepherd #12;1 - 2 CHAPTER 1 atmospheric processes, and the resultant atmospheric pollution loadings. Exposure and Impacts: Understanding of cause-effect relationships among atmospheric pollutants, exposures discussion of the current understanding of airborne particulate matter (PM) among atmospheric scientists. Its

Weber, Rodney

73

A FUNCTIONAL DATA ANALYSIS APPROACH FOR EVALUATING TEMPORAL PHYSIOLOGIC RESPONSES TO PARTICULATE MATTER  

E-Print Network (OSTI)

, including air pollutants such as ozone and particulate matter. Bradycardia and hypothermia are often Hypertensive rats (n=35; 8­9/group) were intratracheally instilled with a bolus dose of saline (control that effects between the control and high dose group persisted for at least 48 hr. The applicability of FDA

Lee, Chihoon

74

Part-load particulate matter from a GDI engine and the connection with combustion characteristics  

Science Journals Connector (OSTI)

Abstract The Gasoline Direct Injection engines are an important source of ultra-fine particulate matter. Significant research effort is still required as improved understanding of soot formation is critical in considering further development or adoption of new technologies. Experimental measurements of engine-out soot emissions have been taken from a modern Euro IV GDI engine at part-load operating conditions. The engine speed and torque were varied in the range 1600–3700 rev/min, and 30–120 Nm, respectively. The engine was invariably operated in stoichiometric and homogeneous combustion mode, with fuel injection early in the intake stroke. The results indicate that for engine load in excess of 3 bar Brake Mean Effective Pressure, due to incomplete gas-phase mixture preparation, a consistent linear correlation establishes between combustion duration and soot particle number. On average, a sixfold increase in number concentration between 1.0 and 6.0 × 106 particle per cc, arises from shortening the rapid duration of 4 crank angle degrees. For engine speed in excess of 3000 rev/min and load in excess of 7 bar BMEP, this correlation appears to be superseded by the effects of spray-to-piston impingement and consequent pool-fire. Three main areas of concern have been identified within the part-load running envelope: (1) the higher load-lower speed range and (2) the mid load-mid speed range, where high nucleation rates induce copious increases of engine-out soot mass; (3) the upper part-load range where, most likely as a result of spray impingement, high levels of soot concentration (up to 10 million particles per cc) are emitted with very small size (23–40 nm).

F. Bonatesta; E. Chiappetta; A. La Rocca

2014-01-01T23:59:59.000Z

75

E-Print Network 3.0 - ambient fine particulate Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

about Clean Transportation projects at the North Carolina Solar Center Summary: or maintenance areas for national ambient air quality standards (NAAQS) for ozone andor fine...

76

Development of a Low-Cost Particulate Matter Monitor  

SciTech Connect

We describe a small, inexpensive portable monitor for airborne particulates, composed of the following elements: a. A simple size-selective inlet (vertical elutriator) that permits only particles below a pre-set diameter to pass and enter the measurement section; b. A measurement section in which passing particles are deposited thermophoretically on a micro-fabricated resonant piezoelectric mass sensor; c. An optical characterization module co-located with the mass sensor module that directs infrared and ultraviolet beams through the deposit. The emergent optical beams are detected by a photodiode. The optical absorption of the deposit can be measured in order to characterize the deposit, and determine how much is due to diesel exhaust and/or environmental tobacco smoke; and d. A small pump that moves air through the device, which may also be operated in a passive mode. The component modules were designed by the project team, and fabricated at UCB andLBNL. Testing and validation were performed in a room-sized environmental chamber at LBNL in to which was added either environmental tobacco smoke (ETS, produced by a cigarette smoking machine) or diesel exhaust (from a conventional diesel engine). Two pilot field tests in a dwelling compared the monitor with existing aerosol instruments during exposure to infiltrated ambient air to which cigarette smoke, diesel exhaust, wood smoke and cooking fumes were added. The limit of detection (LOD) derived from statistical analysis of field data is 18 mu g m-3, at the 99percent confidence level. The monitor weighs less than 120 g and has a volume of roughly 250 cm3. Power consumption is approximately 100 milliwatts. During this study, the optical component of the device was not fully implemented and has been left for future efforts. Suggested improvements in the current prototype include use of integrated thermal correction, reconfiguration of the resonator for increased particle collection area, increased thermophoretic collection efficiency using an increased temperature gradient, and shielding the resonator electronics from deposition of ultrafine particles.

White, Richard M.; Apte, Michael G.; Gundel, Lara A.; Black, Justin

2008-08-01T23:59:59.000Z

77

Respiratory disease and particulate air pollution in Santiago Chile: Contribution of erosion particles from fine sediments  

E-Print Network (OSTI)

August) that make atmospheric conditions highly vulnerable, preventing polluting particles in the airCommentary Respiratory disease and particulate air pollution in Santiago Chile: Contribution pollution Santiago Erosion Sedimentation a b s t r a c t Air pollution in Santiago is a serious problem

78

Characterization of Biodiesel and Biodiesel Particulate Matter by TG, TG?MS, and FTIR  

Science Journals Connector (OSTI)

Characterization of Biodiesel and Biodiesel Particulate Matter by TG, TG?MS, and FTIR ... Pure vegetable oil biodiesels (rapeseed and soybean) were significantly more effective in the cleanup of oiled sands (?96%) than recycled waste cooking oil biodiesel (70%). ... To minimize use of biodiesels synthesized from edible oils, such as palm oil, because of the raising food versus fuel issue, palm biodiesel (PBD) was blended in different weight ratios with biodiesels synthesized from tree-borne non-edible oil seeds, ... ...

Yi-Chi Chien; Mingming Lu; Ming Chai; F. James Boreo

2008-12-05T23:59:59.000Z

79

Abstract 276: Appalachian mountaintop mining particulate matter induces malignant transformation and tumorigenesis of human lung epithelial cells  

Science Journals Connector (OSTI)

...276: Appalachian mountaintop mining particulate matter induces malignant...Virginia (WV), the biggest coal mining state in Appalachia, ranks the third highest rate...that living near WV mountaintop coal mining (MTM) activities is a contributing...

Sudjit Luanpitpong; Juhua Luo; Travis Kneuckles; Michael Hendryx; and Yon Rojanasakul

2014-10-01T23:59:59.000Z

80

Characterization of particulate matter deposited in diesel particulate filters: Visual and analytical approach in macro-, micro- and nano-scales  

SciTech Connect

Multi-scale analytical investigations of particulate matter (soot and ash) of two loaded diesel particulate filters (DPF) from (a) a truck (DPF1) and (b) a passenger car (DPF2) reveal the following: in DPF1 (without fuel-borne additives), soot aggregates form an approximately 130-270 {mu}m thick, homogeneous porous cake with pronounced orientation. Soot aggregates consist of 15-30 nm large individual particles exhibiting relatively mature internal nanostructures, however, far from being graphite. Ash aggregates largely accumulate at the outlet part of DPF1, while minor amounts are deposited directly on the channel walls all along the filter length. They consist of crystalline phases with individual particles of sizes down to the nanoscale range. Chemically, the ash consists mainly of Mg, S, Ca, Zn and P, elements encountered in lubricating oil additives. In the passenger car DPF2 (with fuel-borne additives), soot aggregates form an approximately 200-500 {mu}m thick, inhomogeneous porous cake consisting of several superposed layers corresponding to different soot generations. The largest part of the soot cake is composed of unburned, oriented soot aggregates left behind despite repeated regenerations, while a small part constitutes a loose layer with randomly oriented aggregates, which was deposited last and has not seen any regeneration. Fe-oxide particles of micro- to nano-scale sizes, originating from the fuel-borne additive, are often dispersed within the part of the soot cake composed of the unburned soot leftovers. The individual soot nanoparticles in DPF2 are approximately 15-40 nm large and generally less mature than in the truck DPF1. The presence of soot leftovers in DPF2 indicates that the addition of fuel-borne material does not fully compensate for the temperatures needed for complete soot removal. Ash in DPF2 is filling up more than half of the filter volume (at the downstream part) and is dominated by Fe-oxide aggregates, due to the Fe-based fuel-borne additive, but otherwise its chemical composition reflects compounds of lubricating oil additives. (author)

Liati, Anthi; Dimopoulos Eggenschwiler, Panayotis [EMPA, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for I.C. Engines, Duebendorf (Switzerland)

2010-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Impact of Alternative Fuels on Emissions Characteristics of a Gas Turbine Engine – Part 1: Gaseous and Particulate Matter Emissions  

Science Journals Connector (OSTI)

Impact of Alternative Fuels on Emissions Characteristics of a Gas Turbine Engine – Part 1: Gaseous and Particulate Matter Emissions ... † Center of Excellence for Aerospace Particulate Emissions Reduction Research, Missouri University of Science and Technology, Rolla, Missouri 65409, United States ... Growing concern over emissions from increased airport operations has resulted in a need to assess the impact of aviation related activities on local air quality in and around airports, and to develop strategies to mitigate these effects. ...

Prem Lobo; Lucas Rye; Paul I. Williams; Simon Christie; Ilona Uryga-Bugajska; Christopher W. Wilson; Donald E. Hagen; Philip D. Whitefield; Simon Blakey; Hugh Coe; David Raper; Mohamed Pourkashanian

2012-08-22T23:59:59.000Z

82

Inferring Black Carbon Concentrations in Particulate Organic Matter by Observing Pyrene Fluorescence Losses  

Science Journals Connector (OSTI)

Inferring Black Carbon Concentrations in Particulate Organic Matter by Observing Pyrene Fluorescence Losses ... For example, most atmospheric scientists are interested in the “blackness” of aerosols and the resultant effect on the radiative heat balance (3, 7), while oceanographers and soil scientists are interested in the refractory properties of BC in soils and sediments influencing its role in carbon cycling (5). ... Studies since the late 1970s and early 1980s have suggested that absorption into biogenic and diagenetic organic matter is a key process controlling the fate and effects of hydrophobic organic pollutants (8, 9), and this process has been described using a linear sorption model where Kd is the solid?water distribution coefficient (L/kgsolid), and this parameter is estimated using the product of the total organic carbon (TOC) fraction (fTOC, kgTOC/kgsediment) and the TOC-normalized distribution coefficient (KTOC, L/kgTOC). ...

D. Xanat Flores-Cervantes; Christopher M. Reddy; Philip M. Gschwend

2009-05-29T23:59:59.000Z

83

Utilization, cycling and vertical transport of particulate organic matter in the coastal marine environment  

SciTech Connect

This project was funded as part of the California Basin Study (CaBS), a DOE-funded regional program investigating production, cycling, transport, and fate of organic matter, chemical tracers, and pollutants in the Southern California Bight. The study area, adjacent to Los Angeles, was of programmatic interest due to its heavy concentration of energy-related activities, including offshore oil drilling and natural seeps, shipping, nuclear power facilities, and industrial and municipal ocean waste disposal. It was also of scientific interest because the wide continental margin in the region, pot-marked with natural sediment traps in the form of deep basins with restricted inputs and outputs, was ideal for integrating water-column and benthic studies and tracing the fates of in situ production and introduced pollutants. Our role in the CABS Program was to investigate the flux of particulate matter through the water column, emphasizing the relationship between macrozooplankton feeding and particle flux.

Landry, M.R.

1992-01-01T23:59:59.000Z

84

COMMENTS OF DEPARTMENT OF ENERGY ON JUNE 2003 FOURTH EXTERNAL REVIEW DRAFT CRITERIA DOCUMENT FOR PARTICULATE MATTER  

NLE Websites -- All DOE Office Websites (Extended Search)

COMMENTS OF DEPARTMENT OF ENERGY/OFFICE OF FOSSIL COMMENTS OF DEPARTMENT OF ENERGY/OFFICE OF FOSSIL ENERGY STAFF ON JUNE 2003 FOURTH EXTERNAL REVIEW DRAFT CRITERIA DOCUMENT FOR PARTICULATE MATTER Summary and Conclusions The Fourth External Review Draft Criteria Document for Particulate Matter (henceforth, the CD) is a very comprehensive review of both epidemiological and toxicological research into the health effects of particulate matter (PM) in ambient air. DOE/Office of Fossil Energy offers the following comments on it. OMB's "Principles and Procedures" memorandum to agencies states: "OIRA's [OMB's Office of Information and Regulatory Affairs] review also evaluates, on occasion in consultation with the Office of Science and Technology Policy, whether the agency has, in assessing exposure to a risk or an environmental

85

{open_quotes}Fine particulate control and air toxics{close_quotes}  

SciTech Connect

Tables 1-4 give an overview of current TSP control capabilities of fabric filters on some applications. Very little data is available as to the control of PM{sub 10} and under. Most air toxic limitations will require much higher control as can be seen in Tables 5 and 6. The control of most air toxics is definitely related to the control of TSP and PM{sub 10}, however it appears that meeting current limits of TSP do not ensure meeting the desired air toxic limits. Since TSP is desired to be used as a surrogate and is all that is routinely monitored through opacity or other stack CEM systems, lower TSP limits would have to be met which opens the question of how accurate we can monitor TSP or PM{sub 10} on a continuous basis. Tables 3 and 4 provide some insight as to the uniformity of TSP results between identical operating units and over time at two NSW installation. Except for the 9/10/91 test, the baghouses were inspected for failing bags prior to testing. Tables 7 and 8 show the impact of TSP and air toxic metals of a plant upset. In this case it took up to one day for the emissions to return to normal following a 30 minute complete shutdown of the incinerator and three baghouse systems being tested. Table 9 describes the impact of broken bags on emissions for a typical size baghouse. As emission levels become tighter in attempts to control air toxics, response to broken bags will take on new importance. More importantly, system design changes to promote longer bag life and better emission monitoring will be needed. Once continuous monitoring of outlet particulate is required, the industry will be challenged. Until then it will be business as usual with designs aimed at passing a one time or yearly stack test with the baghouse primed for peak performance. This won`t do much to protect the environment from air toxics to the proposed units.

Chang, R. [Electric Power Research Institute, Palo Alto, CA (United States); Greiner, G.P. [ETS International, Inc., Roanoke, VA (United States); Harrison, W. [Southern Company Services, Birmingham, AL (United States); Nichols, G.B. [Southern Research Institute, Birmingham, AL (United States)

1994-12-31T23:59:59.000Z

86

The distribution of particulate matter in the Equatorial and Subtropical South Atlantic Ocean: evidence for sources, transport and sinks of particles  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 Advection and Resuspension Associated with Boundaries. . . . . . . . . . . 71 The Brazil Basin. . 71 The Angola Basin. 74 Particulate Matter Associated with the Oxygen Minimum. . . . . . . . . . . 76 Agreement with Previous Work. . . 80... include primary production, aggregation, dissolution, diffusion, gravitational settling, upwelling, boundary layer mixing, and the resuspension and advection of sediments. For many elements involved in biogeochemical cycles, particulate matter serves...

Berglund, Bret Lawrence

1989-01-01T23:59:59.000Z

87

Metallic species in atmospheric particulate matter in Las Palmas de Gran Canaria  

Science Journals Connector (OSTI)

In this work, we quantified the total, water-soluble and insoluble fractions of 12 metallic species (Na, Ca, K, Mg, Fe, Zn, Cr, Ni, Cu, Cd, Pb and Mn) present in total suspended particulates (TSP) in an urban area with heavy traffic (about 80 000 vehicles/day) of Las Palmas de Gran Canaria (Canary Islands). Experimental measurements were made from July to December 2003 on a total of 42 samples (7 per month). Particulate matter (TSP) was collected in fiber filters and high volume samplers. PM10 levels were estimated assuming the PM10 fraction is about 70% of all TSP. Total fractions was determined gravimetrically. Water-soluble fraction was extracted by sonication. Concentrations of metallic elements were analyzed by flame atomic absorption spectrophotometer. Temporal changes in the concentrations of the target elements were examined and a multivariate approach used to identify the primary sources for each species. Mean value for TSP is 71.92 ?g/m3. The water-soluble fraction consisted mainly of Na, Ca, Mg, and K. The insoluble fraction contained higher concentrations of all elements than the soluble except Na. In the water-soluble fraction, Na, K, Ca and Mg were found to come mainly from natural sources; Cr, Pb, Cd, Ni, Zn and Cu from anthropogenic sources.

J. López Cancio; A. Vera Castellano; M. Chaar Hernández; R. García Bethencourt; E. Macías Ortega

2008-01-01T23:59:59.000Z

88

Variations in mass concentrations of airborne particulate matter over tropical urban environment  

Science Journals Connector (OSTI)

Particulate matter (PM) is an important component of the air pollution that has adverse health effects, ecosystem damage and degraded visibility. We analysed the seasonal variations in PM loading from ground-based measurements of PM1.0 and PM2.5, Aerosol Optical Depth (AOD) Black Carbon (BC) aerosol over Hyderabad, India during January-June, 2006. The PM concentrations showed relatively higher values during winter period and lower values during summer. PM1.0 values showed positive correlation with BC, OMI-AI, MODIS-AOD and ground measured AOD. The seasonal variations in PM1.0 were attributed to vehicular traffic patterns, biomass burning and dust aerosols over the region.

K.V.S. Badarinath; Shailesh Kumar Kharol; V. Krishna Prasad; K. Madhavi Latha; Anu Rani Sharma; E.U.B. Reddy

2010-01-01T23:59:59.000Z

89

Source apportionment of time- and size-resolved ambient particulate matter  

Science Journals Connector (OSTI)

Abstract Size- and time-resolved particulate matter samples collected using eight-stage Davis Rotating-drum Universal-size-cut Monitoring (DRUM) impactors at the Washington-Dulles International Airport were analyzed for the elemental composition using synchrotron X-ray fluorescence. A physically realistic three-way factor analysis model consisting of the outer products of matrices (profiles) times a vector of mass contributions was applied to these data. The problem was solved using a weighted alternating least squares method. Five major emission sources: soil, road salt, aircraft landings, transported secondary sulfate, and local sulfate/construction were identified. The study shows that time- and size-resolved RDI data can assist in the identification of the airport emission sources and atmospheric processes leading to the observed ambient concentrations.

Na Li; Philip K. Hopke; Pramod Kumar; Steven S. Cliff; Yongjing Zhao; Carmeliza Navasca

2013-01-01T23:59:59.000Z

90

Characterization of particulate matter (PM10) related to surface coal mining operations in Appalachia  

Science Journals Connector (OSTI)

This study investigates the environmental exposure of residents of a community in southwest Virginia to respirable concentrations of dust (PM-10 i.e. PM10) generated by trucks hauling coal from surface coal mining operations. The study site is representative of communities in southwest Virginia and other parts of Appalachia that are located in narrow hollows where homes are placed directly along roads that experience heavy coal truck traffic. Preliminary air sampling (Particulate Matter i.e. PM10) was conducted for a period of approximately two weeks during early August 2008 in the unincorporated community of Roda, Virginia, at two locations (about a mile apart along Roda Road (Route 685) in Wise County, Virginia). For the purposes of this study (a combination of logistics, resource, and characterization of PM) we sited the PM samplers near the road to ascertain the micro exposure from the road. The results revealed high levels of PM10 (the mean adjusted 24-h concentration at the Campbell Site = 250.2 ?g m?3 (±135.0 ?g m?3); and at the Willis Site = 144.8 ± 60.0 ?g m?3). The U.S. 24-h national ambient air quality standard for PM10 is 150 ?g m?3. Elemental analysis for samples (blank-corrected) collected on Quartz filter paper (on one randomly selected day) at both the sites revealed the presence of antimony, arsenic, beryllium, cadmium, chromium, cobalt, lead, manganese, mercury, nickel, selenium. Electron micrographs reveal the morphology and habit (shapes and aggregates) of the particulate matter collected.

Viney P. Aneja; Aaron Isherwood; Peter Morgan

2012-01-01T23:59:59.000Z

91

Demolition of High-Rise Public Housing Increases Particulate Matter Air Pollution in Communities of High-Risk Asthmatics  

E-Print Network (OSTI)

) air pollution, which may ad- versely affect the respiratory health of nearby residents. DemolitionDemolition of High-Rise Public Housing Increases Particulate Matter Air Pollution in Communities of High-Risk Asthmatics Samuel Dorevitch Division of Environmental and Occupational Health Sciences

Illinois at Chicago, University of

92

Source Apportionment of Daily Fine Particulate Matter at Jefferson Street, Atlanta, GA, during Summer and Winter  

E-Print Network (OSTI)

, especially wood burning, as well as vehicular exhaust, and suggest that secondary aerosol for- mation dominates in summer in Atlanta. TECHNICAL PAPER ISSN 1047-3289 J. Air & Waste Manage. Assoc. 57:228­242 Copyright 2007 Air & Waste Management Association 228 Journal of the Air & Waste Management Association

Zheng, Mei

93

Study on suspended particulate matter in the vicinity of a roadway  

Science Journals Connector (OSTI)

Suspended particulate matter (SPM) concentrations were measured and their composition was analysed at many sites around The Loop Road No. 8 (Traffic 100,000 vehicle/day) to determine the source contribution to SPM in the central part of Tokyo. It was found that SPM concentrations decreased with distance from the road. SPM concentrations decreased with distance by about 20% at 100m from the road. Total SPM in winter was composed of three main components carbon by 40%, ions by 30% and metals by 10%. Principal component analysis was performed for the data set of 16 data and 25 variables and identified three principal components, explaining 86.4% of total variance of SPM. The first principal component, which accounts for 64.3% of the total SPM, is regarded as an overall contamination index. The most plausible source of this component may be waste and biomass burning. The second principal component may be road dust and the third principal component may be attributable to automotive exhaust emissions.

Shin'ichi Okamoto; Katsuyuki Takahashi; Naoto Minakawa

2001-01-01T23:59:59.000Z

94

Size distribution of metals in particulate matter formed during combustion of residual fuel oil  

SciTech Connect

Between July 1992 and January 1993 three full-scale test programs were performed by Carnot for the Electric Power Research Institute and the Fuel Oil Users` Support (FOUS) Group, as part of a program for development and testing of various stack emissions models. One of the components of the program was determination of the concentrations of individual elements as a function of the size of particles suspended in flue gas. The size distributions of species are important because several aspects of system performance depend upon particulate matter size and composition: (1) the rate of ash deposition in the convection section, and activity of deposits for high temperature corrosion and SO{sub 3} formation, (2) the efficiency of precipitators for collection of individual elements, and (3) scattering of visible light and contribution of particles to stack plume opacity. Size distributions of major ash constituents were measured at the entrance and exit of the dust collectors during each of the field tests. To the authors` knowledge, these are the first reports of such measurements in residual oil-fired utility boilers. The focus, in the present paper, is on the composition of the particles entering the dust collectors.

Walsh, P. [Pennsylvania State Univ., University Park, PA (United States); Rovesti, W.C. [Electric Power Research Institute, Washington, DC (United States); Freeman, R.F. [Niagara Mohawk Power Corp., Oswego, NY (United States); Olen, K.R.; Washington, K.T.; Patrick, S.T.; Campbell, G.L.; Harper, D.S. [Florida Power & Light Co., West Palm Beach, FL (United States); Teetz, R.D.; Bennett, T.E. [Long Island Lighting Co., Glenwood Landing, NY (United States)] [and others

1994-08-01T23:59:59.000Z

95

Ecology ofVibrio vulnificus in Galveston Bay oysters, suspended particulate matter, sediment and seawater: Detection by monoclonal antibody — immunoassay — most probable number procedures  

Science Journals Connector (OSTI)

Oysters, suspended particulate matter (SPM), sediment and seawater samples were collected from West Galveston Bay, Texas over a 16-month period and analyzed...Vibrio vulnificus, a naturally-occurring human marine...

R. Will Vanoy; Mark L. Tamplin; John R. Schwarz

96

Measurements of OC and EC in coarse particulate matter in the southeastern United States  

SciTech Connect

The organic carbon (OC) and elemental carbon (EC) content of filter-based, 24-hr integrated particulate matter with aerodynamic diameters between 2.5 and 10 {mu}m (PM10-2.5) was measured at two urban and two rural locations in the southeastern United States. On average, total carbon (OC + EC) comprised approximately 30% of PM10-2.5 mass at these four sites. Carbonate carbon was measured on a subset of samples from three sites and was found to be undetectable at a rural site in central Alabama, less than 2% of PM10-2.5 at an urban site in Georgia, and less than 10% of PM10-2.5 at an urban-industrial site in Alabama. Manual scanning electron microscopy (SEM) and computer-controlled SEM (CCSEM) along with energy dispersive X-ray spectroscopy (EDS) were used to identify individual carbonaceous particles in a selected subset of samples collected at one rural site and one urban-industrial site in Alabama. CCSEM results showed that biological material (e.g., fungal spores, pollen, and vegetative detritus) accounted for 60-70% of the carbonaceous mass in PM10-2.5 samples with concentrations in the range of 2-16 {mu}g/m{sup 3}. Samples with higher PM10-2.5 concentrations (25-42 {mu}g/m{sup 3}) at the urban-industrial site were found by manual SEM to have significant amounts of unidentified carbonaceous material, likely originating from local industrial activities. Both filter-based OC and EC concentrations and SEM-identified biological material tended to have higher concentrations during warmer months. Upper limits for organic mass (OM) to OC ratios (OM/OC) are estimated for PM10-2.5 samples at 2.1 for urban sites and 2.6-2.7 for rural sites. 40 refs., 12 figs., 5 tabs.

Edgerton, E.S.; Casuccio, G.S.; Saylor, R.D.; Lersch, T.L.; Hartsell, B.E.; Jansen, J.J.; Hansen, D.A. [Atmospheric Research & Analysis, Inc., Cary, NC (United States)

2009-01-15T23:59:59.000Z

97

A science based emission factor for particulate matter emitted from cotton harvesting  

E-Print Network (OSTI)

practice plans detailing the actions taken by the producer to reduce fugitive PM emissions from field operations. The objective of this work was to develop accurate PM emission factors for cotton harvesting in terms of total suspended particulate (TSP), PM...

Wanjura, John David

2009-05-15T23:59:59.000Z

98

Impact of the Driving Cycle on the NOx and Particulate Matter Exhaust Emissions of Diesel Passenger Cars  

Science Journals Connector (OSTI)

Impact of the Driving Cycle on the NOx and Particulate Matter Exhaust Emissions of Diesel Passenger Cars ... The driving cycles used are the New European Driving Cycle (NEDC), the 11 and 15 modes Japanese cycles, and three U.S. driving cycles: Federal Test Procedure (FTP-75), US06, and Highway. ... In general, we can state that a reduction in compression ratio in combination with an advanced boosting system and a fast response of the EGR system with advanced EGR cooling leads to a reduction of the emission level. ...

Efthimios Zervas; George Bikas

2008-02-19T23:59:59.000Z

99

Impact of Sugarcane Renewable Fuel on In-Use Gaseous and Particulate Matter Emissions from a Marine Vessel  

Science Journals Connector (OSTI)

In-use emissions aboard a Stalwart class vessel, the T/S State of Michigan, were measured from a four-stroke marine diesel generator operating on two fuels: ultra-low-sulfur diesel (ULSD) fuel and ULSD mixed with Amyris renewable diesel (S33; 33% by volume) produced from sugarcane feedstocks with 67% by volume ULSD. ... A model 6V92TA Detroit Diesel Corporation diesel engine (9.0 L) was fueled on blends of 10, 20, 30 and 40% soydiesel-diesel fuel. ... Fueling with biodiesel/diesel fuel blends reduced particulate matter (PM), total hydrocarbons (THC) and CO, while increasing NOx. ...

Nicholas R. Gysel; Robert L. Russell; William A. Welch; David R. Cocker; III; Sujit Ghosh

2014-04-30T23:59:59.000Z

100

Measurement of particulate matter and trace elements from a coal-fired power plant with electrostatic precipitators equipped the low temperature economizer  

Science Journals Connector (OSTI)

Abstract The particulate matter and trace elements from a 660 MW coal-fired power plant boiler which equipped with a novel electrostatic precipitator were sampled and analyzed. To promote the thermal efficiency of power plants, a low temperature economizer was installed at the inlet of electrostatic precipitator to collect the heat generated from flue gas. The low temperature economizer can reduce flue gas temperature, and then affect the operation of electrostatic precipitator. Therefore, this experiment was carried out to investigate the collection characteristics of this novel electrostatic precipitator on particulate matter. In addition, the distribution of trace elements in solid combustion residues was also studied. The results indicate that the low temperature economizer can markedly decrease the amount of particulate matter at the outlet of electrostatic precipitator. The collection efficiency of electrostatic precipitator on particulate matter is significantly improved by the low temperature economizer, whereby the collection efficiencies of PM2.5 and PM1.0 can reach 99.7% and 99.2%, respectively. Most of the trace elements remain in the fly ash collected by the electrostatic precipitator, and less than 10% remain in the bottom ash, but very rare emit from the electrostatic precipitator. The low temperature economizer not only reduces the emission of particulate matter, but also diminishes the emissions of trace elements in flue gas. The enrichment characteristics of trace elements in submicron particles were also studied.

Chao Wang; Xiaowei Liu; Dong Li; Junping Si; Bo Zhao; Minghou Xu

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Magnetic properties and Mössbauer spectra of urban atmospheric particulate matter: a case study from Munich, Germany  

Science Journals Connector (OSTI)

......in urban pollution PM, the...impurities in fossil fuels convert on...found in air-conditioning...isopropanol solution was wet-sieved...Report of the Air Quality of Urban Air Review Group...particulates from pollution in the environment...distance from fossil fuel power stations......

A. R. Muxworthy; E. Schmidbauer; N. Petersen

2002-08-01T23:59:59.000Z

102

Characterization of Ultrafine Particulate Matter from Traditional and Improved Biomass Cookstoves  

Science Journals Connector (OSTI)

In this laboratory study, we compared the size, composition, and morphology of ultrafine particulate emissions from a “three-stone” traditional fire to those from two improved stove designs (one “rocket”, one “gasifier”). ... Since emissions properties vary depending on burn phases,(25) we targeted a medium-power, “steady” combustion condition most similar to the “simmer” phase of the WBT (considerable variations in emissions still occur; this is discussed later). ...

Brian Just; Steven Rogak; Milind Kandlikar

2013-03-07T23:59:59.000Z

103

Fine Particle Emissions from Combustion Systems  

NLE Websites -- All DOE Office Websites (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

104

Total Particulate Matter Air Sampling Data (TEOM) from Los Alamos National Laboratory  

DOE Data Explorer (OSTI)

LANL measures the total particulate mass concentration in the air on a routine basis as well as during incidents that may affect ambient air. The collected data is added to the Air Quality Index (AQI). AQI is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air. EPA calculates the AQI for five major air pollutants regulated by the Clean Air Act.

105

Stable Carbon Isotope Ratios of Phenolic Compounds in Secondary Particulate Organic Matter Formed by Photooxidation of Toluene  

E-Print Network (OSTI)

Compound-specific stable carbon isotope ratios for phenolic compounds in secondary particulate organic matter (POM) formed by photooxidation of toluene were studied. Secondary POM generated by photooxidation of toluene using a continuous-flow reactor and an 8 cubic meter indoor smog chamber was collected, and then extracted with acetonitrile. Eight phenolic compounds were identified in the extracts by a gas chromatograph coupled with a mass spectrometer, and their compound-specific stable carbon isotope ratios were determined by a gas chromatograph coupled with a combustion furnace followed by an isotope ratio mass spectrometer. The majority of the products, including methylnitrophenols and methylnitrocatechols, were isotopically depleted by 5 to 6 permil compared to the initial isotope ratio for toluene, whereas the isotope ratio for 4_nitrophenol remained the same as the initial isotope ratio for toluene. Based on the reaction mechanisms postulated in literature, stable carbon isotope ratios of these produc...

Irei, Satoshi; Huang, Lin; Auld, Janeen; Collin, Fabrice; Hastie, Donald

2014-01-01T23:59:59.000Z

106

Evaluation of Ambient Particulate Matter (PM) Sampler Performance Through Wind Tunnel Testing  

E-Print Network (OSTI)

.46. The mean cut-point and slope values were statistically different from the upper limit of EPA-specified performance criteria of 10.5 mu m for the cut-point and 1.6 for the slope. The PM10 samplers over-sampled cornstarch but under-sampled ultrafine and fine...

Guha, Abhinav

2010-07-14T23:59:59.000Z

107

Particulate matter characteristics during agricultural waste burning in Taichung City, Taiwan  

Science Journals Connector (OSTI)

Agricultural waste burning is performed after harvest periods in June and November in Taiwan. Typically, farmers use open burning to dispose of excess rice straw. PM2.5 and PM2.5–10 measurements were conducted at National Chung Hsing University in Taichung City using a dichotomous sampler. The sampling times were during straw burning periods after rice harvest during 2002–2005. Ionic species including SO42?, NO3?, NH4+, K+, Ca2+, Cl? and Na+ and carbonaceous species (EC and OC) in PM2.5 and PM2.5–10 were analyzed. The results showed that the average PM2.5 and PM2.5–10 concentrations were 123.6 and 31.5 ?g m?3 during agricultural waste burning periods and 32.6 and 21.4 ?g m?3 during non-waste burning periods, respectively. The fine aerosol ionic species including Cl?, K+ and NO3? increased 11.0, 6.7 and 5.5 times during agricultural burning periods compared with periods when agricultural waste burning is not performed. K+ was found mainly in the fine mode during agricultural burning. High nitrogen oxidation ratio was found during agricultural waste burning periods which might be caused by the conversion of Nitrogen dioxide (NO2) to NO3?. It is concluded that agricultural waste burning with low dispersion often causes high PM2.5 and gases pollutant events.

Man-Ting Cheng; Chuen-Liang Horng; Yi-Ru Su; Li-Kai Lin; Yu-Chi Lin; Charles C.-K. Chou

2009-01-01T23:59:59.000Z

108

Chemical Characterization and Source Apportionment of Household Fine Particulate Matter in Rural, Peri-urban, and Urban West Africa  

Science Journals Connector (OSTI)

In addition to household’s own fuel, HAP in urban households is affected by the extent of biomass use in the neighborhood, and by traffic-related sources. ... The elemental concentrations of the samples were quantified by energy dispersive X-ray fluorescence (ED-XRF) using a Shimadzu EDX-700HS spectrometer (Shimadzu Corp., Japan) at the Institute of Astronomy, Geophysics and Atmospheric Science, University of Sao Paulo, Brazil. ...

Zheng Zhou; Kathie L. Dionisio; Thiago G. Verissimo; Americo S. Kerr; Brent Coull; Stephen Howie; Raphael E. Arku; Petros Koutrakis; John D. Spengler; Kimberly Fornace; Allison F. Hughes; Jose Vallarino; Samuel Agyei-Mensah; Majid Ezzati

2013-12-18T23:59:59.000Z

109

Exposure information in environmental health research: Current opportunities and future directions for particulate matter, ozone, and toxic air pollutants  

SciTech Connect

Understanding and quantifying outdoor and indoor sources of human exposure are essential but often not adequately addressed in health-effects studies for air pollution. Air pollution epidemiology, risk assessment, health tracking and accountability assessments are examples of health-effects studies that require but often lack adequate exposure information. Recent advances in exposure modeling along with better information on time-activity and exposure factors data provide us with unique opportunities to improve the assignment of exposures for both future and ongoing studies linking air pollution to health impacts. In September 2006, scientists from the US Environmental Protection Agency (EPA) and the Centers for Disease Control and Prevention (CDC) along with scientists from the academic community and state health departments convened a symposium on air pollution exposure and health in order to identify, evaluate, and improve current approaches for linking air pollution exposures to disease. This manuscript presents the key issues, challenges and recommendations identified by the exposure working group, who used cases studies of particulate matter, ozone, and toxic air pollutant exposure to evaluate health-effects for air pollution. One of the over-arching lessons of this workshop is that obtaining better exposure information for these different health-effects studies requires both goal-setting for what is needed and mapping out the transition pathway from current capabilities to meeting these goals. Meeting our long-term goals requires definition of incremental steps that provide useful information for the interim and move us toward our long-term goals. Another over-arching theme among the three different pollutants and the different health study approaches is the need for integration among alternate exposure assessment approaches. For example, different groups may advocate exposure indicators, biomonitoring, mapping methods (GIS), modeling, environmental media monitoring, and/or personal exposure modeling. However, emerging research reveals that the greatest progress comes from integration among two or more of these efforts.

McKone, Thomas E.; Ryan, P. Barry; Ozkaynak, Haluk

2007-02-01T23:59:59.000Z

110

Particulate matter exposure during pregnancy is associated with birth weight, but not gestational age, 1962-1992: a cohort study  

E-Print Network (OSTI)

HS, Maynard RL: Air pollution and health London: Academic;the effects of air pollution on health in the United KingdomD: Particulate air pollution and fetal health: a systematic

2012-01-01T23:59:59.000Z

111

Development and validation of a semi-empirical model for the estimation of particulate matter in diesel engines  

Science Journals Connector (OSTI)

Abstract A semi-empirical correlation for the estimation of PM (particulate matter) emissions in diesel engines, as a function of significant engine operating variables, has been developed and validated on a GM (General Motors) Euro 5 diesel engine. The experimental data used in the present study have been acquired at the dynamic test bench of ICEAL-PT (Internal Combustion Engine Advanced Laboratory at the Politecnico di Torino), in the frame of a research activity with GMPT-E (General Motors PowerTrain-Europe) for the calibration of a Euro 5 prototype 2.0 liter diesel engine equipped with a twin-stage turbine and a piezo-driven Common Rail injection system. The experimental data were acquired for six key-points representative of the engine working conditions over a NEDC (New European Driving Cycle). The experimental tests have been carried out according to the Design of Experiment approach and for each point several variation lists of the main engine variables have been considered. As a first step, the main engine variables which are expected to be related to the formation and oxidation of PM have been identified. An exponential mathematical model has then been introduced and a detailed statistical analysis has been carried out for each key-point in order to identify the most robust combination of the input variables among all the possible ones. It was verified that PM emissions are correlated to a great extent to the value of the chemical heat release at the end of the injection of the main pulse. This quantity is in fact related to the mass of burned gases which is generated by the oxidation of the pilot pulses that precede the main injection. Such a mass can have a large impact on the local oxygen concentration and temperature of the charge in which the fuel of the main pulse is injected, with a consequent effect on PM formation. Additional quantities have also been considered in the investigation: the relative air-to-fuel ratio ?, the intake charge oxygen concentration, the accumulated fuel mass, the equivalence ratio of the spray at the main pulse start of combustion and some combustion metrics related to the heat release rate. At the end of the statistical analysis, the most influencing parameters have been selected and a semi-empirical model to predict the in-cylinder formed PM mass has been developed. The model has hence been tested under both steady-state and transient conditions.

Roberto Finesso; Daniela Misul; Ezio Spessa

2014-01-01T23:59:59.000Z

112

Evaluation of the modified Anderson sampler for determining particle size distributions and respirable concentrations of particulate matter present in the working environment of cottonseed oil mills  

E-Print Network (OSTI)

to fluctuate during the day within the same work areas. From the particle size data, it was evident that, to fully characterize the dust collected, addi- tional stages were required. At least two additional stages, one with a 40 um effective cutoff diameter..., would have provided a more complete dust characterization. Also, it was evident that a high percentage of the particulate matter was in the 7 to 100 um in diameter particle size range. Unusually high concentrations of dust in this range were found...

Matlock, Stanley Wayne

2012-06-07T23:59:59.000Z

113

NETL: News Release - Projects Selected to Study Coal Plant Particulate  

NLE Websites -- All DOE Office Websites (Extended Search)

5, 2004 5, 2004 Projects Selected to Study Coal Plant Particulate Matter, Human Health PITTSBURGH, PA - The Department of Energy has selected three projects to help determine whether fine particulates emitted from coal-fired power plants affect human health, and which components of the particulates may be most problematic. Past studies have established that particulate matter smaller than 2.5 microns in diameter from all sources does affect human health, but there is scant information to provide a link between PM2.5 emitted specifically from coal plants and cardiac or respiratory health problems in humans. PM2.5 refers to particles-invisible to the eye-no more than 1/30th of the width of a human hair Coal plants emit only small quantities of "primary" PM2.5 (e.g., fly ash) because all plants have high-efficiency particulate-collection devices. However, coal plants are responsible for a great deal of "secondary" PM2.5, which forms in the atmosphere from emissions of sulfur dioxide (SO2) and nitrogen oxides (NOx). Data collected in the new studies will be used to help design standards reviews and to devise strategies for controlling power plant emissions of PM2.5, SO2, and NOx.

114

Utilization, cycling and vertical transport of particulate organic matter in the coastal marine environment. Final project report, November 15, 1987--May 14, 1992  

SciTech Connect

This project was funded as part of the California Basin Study (CaBS), a DOE-funded regional program investigating production, cycling, transport, and fate of organic matter, chemical tracers, and pollutants in the Southern California Bight. The study area, adjacent to Los Angeles, was of programmatic interest due to its heavy concentration of energy-related activities, including offshore oil drilling and natural seeps, shipping, nuclear power facilities, and industrial and municipal ocean waste disposal. It was also of scientific interest because the wide continental margin in the region, pot-marked with natural sediment traps in the form of deep basins with restricted inputs and outputs, was ideal for integrating water-column and benthic studies and tracing the fates of in situ production and introduced pollutants. Our role in the CABS Program was to investigate the flux of particulate matter through the water column, emphasizing the relationship between macrozooplankton feeding and particle flux.

Landry, M.R.

1992-10-01T23:59:59.000Z

115

Thermal Desorption-Gas Chromatography or Gas Chromatography-Mass Spectrometry for Analysis of Semi-Volatile Compounds on Atmospheric Particulate Matters  

Science Journals Connector (OSTI)

Abstract A thermal desorption (TD) device was developed and coupled to gas chromatograph (GC) or gas chromatograph-mass spectrometer (GC-MS) for the qualitative and quantitative analysis of semi-volatile organic compounds on atmospheric particulate matters (PM). The TD was operated by direct heating and placed on the top of GC injector, leading to high heating rate and easy transfer of analytes to GC without re-focusing of analytes by cold trap. The materials used for supporting PM samples, desorption temperature and time, and types of sample injection were investigated for the detection of sixteen polycyclic aromatic hydrocarbons (PAHs) and nine n-alkanes. The limits of detection of the proposed TD-GC method were in the range of 0.014–0.094 ng for PAHs, and 0.016–0.026 ng for n-alkanes, with coefficients of correlation above 0.9975. The TD-GC method was applied to the determination of trace \\{PAHs\\} and n-alkanes on PM10 samples from three cities. The recoveries were in the range of 95%–135% (PAHs) and 95%–115% (n-alkanes). Finally, the TD was coupled to GC-MS for comparison of the contents of \\{PAHs\\} and n-alkanes on \\{PMx\\} with different particulate size (x = 10, 5, 2, 1, 0.5, 0.25, 0.1).

Hu MENG; Jing-Hong ZHAO; Chun-Feng DUAN; Liang HAO; Ya-Feng GUAN

2014-01-01T23:59:59.000Z

116

Primary production, nutrients, and particulate matter in the southern California bight: Contributions to the C, N, and O/sub 2/ budgets: A component of the California Basin Study (CaBS): (Progress report, November 1988)  

SciTech Connect

A carbon budget has been developed for the euphotic zone in the surface waters of the Santa Monica Basin off Los Angeles, California, by CaBS. This grant provided several components of the budget: primary production, new production (equivalent to the sinking flux of biogenic particles out of the euphotic zone), standing stocks of particulate matter including particulate organic carbon, nitrogen and chlorophyll. Ancillary measurements of plant nutrients (nitrate, phosphate, silicic acid) were also made relative to primary and new production rates. The residence time of particulate matter in the euphotic zone was also determined as this is important for removal of particle-reactive substances, such as certain metals, hydrocarbons and chlorinated hydrocarbons. 12 refs., 1 tab.

Eppley, R.W.

1988-01-01T23:59:59.000Z

117

In-situ partitioning and bioconcentration of polycyclic aromatic hydrocarbons among water, suspended particulate matter, and fish in the Dongjiang and Pearl Rivers and the Pearl River Estuary, China  

Science Journals Connector (OSTI)

Abstract The partitioning and bioaccumulation of polycyclic aromatic hydrocarbons (PAHs) in water, suspended particulate matter (SPM), and fish samples from the Dongjiang River (DR), Pearl River (PR), and the Pearl River Estuary (PRE) were examined. Although \\{PAHs\\} are much lower in PRE than in DR or PR, \\{PAHs\\} in some fish species are significantly higher in PRE than in DR or PR. Aqueous or particulate \\{PAHs\\} respectively show significant correlations with dissolved organic carbon, particulate organic matter, and chlorophyll a, suggesting that biological pumping effect regulates their distribution. The in situ partitioning coefficients (log Koc) for \\{PAHs\\} are one order magnitude higher than the empirical log Koc–log Kow correlation. The bioconcentration factor (BCF) is slightly higher for the marine fish than for the freshwater fish. The above phenomena indicate that BCF may vary due to the diversity of fish species, feeding habits, and metabolism of \\{PAHs\\} in fish.

Haiyan Li; Lei Lu; Wen Huang; Juan Yang; Yong Ran

2014-01-01T23:59:59.000Z

118

ADVANCED HYBRID PARTICULATE COLLECTOR  

SciTech Connect

A new concept in particulate control, called an advanced hybrid particulate collector (AHPC), is being developed under funding from the US Department of Energy. The AHPC combines the best features of electrostatic precipitators (ESPs) and baghouses in a manner that has not been done before. The AHPC concept consists of a combination of fabric filtration and electrostatic precipitation in the same housing, providing major synergism between the two collection methods, both in the particulate collection step and in the transfer of dust to the hopper. The AHPC provides ultrahigh collection efficiency, overcoming the problem of excessive fine-particle emission with conventional ESPs, and it solves the problem of reentrainment and collection of dust in conventional baghouses. The AHPC is currently being tested at the 2.7-MW scale at the Big Stone power station.

Stanley Miller; Rich Gebert; William Swanson

1999-11-01T23:59:59.000Z

119

Particulate Matter Emissions from a Direct Injection Spark Ignition Engine under Cold Fast Idle Conditions for Ethanol-Gasoline Blends  

E-Print Network (OSTI)

The engine out particular matter number (PN) distributions at engine coolant temperature (ECT) of 0° C to 40° C for ethanol/ gasoline blends (E0 to E85) have been measured for a direct-injection spark ignition engine under ...

Dimou, Iason

120

E-Print Network 3.0 - air particulate analysis Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

air particulate analysis Page: << < 1 2 3 4 5 > >> 1 Statistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter Summary: and the composition of...

Note: This page contains sample records for the topic "fine particulate matter" 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

E-Print Network 3.0 - ambient particulate matterpm10 Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

particulate matterpm10 Page: << < 1 2 3 4 5 > >> 1 Statistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter Summary: Ambient Air Quality Standards...

122

Satellite-based estimates of ground-level fine particulate matter during extreme events: A case study of the Moscow fires in 2010  

E-Print Network (OSTI)

adverse health effects. Large short-term increases in air pollution, or air pollution episodes, in the mid on August 7, 2010 in the Moscow region of the Russian Federation. We estimate that exposure to air pollution, but it is reasonable to assume that these extreme, short-lived excursions in ambient air pollution resulted in serious

Martin, Randall

123

COMPARATIVE EVALUATION OF AMBIENT FINE PARTICULATE MATTER (PM2.5) DATA OBTAINED FROM URBAN AND RURAL MONITORING SITES ALONG THE UPPER OHIO RIVER VALLEY  

SciTech Connect

The report discusses the following conclusions: (1) The TEOM equipment performed as well as the sequential filter samplers in accounting for ambient PM{sub 2.5} levels; however, the FRM-obtained data was consistently lower than the averages from the TEOM/DRI-SFS measurements; (2) The trending in the PM{sub 2.5} levels was similar for Lawrenceville and Holbrook, which represent an urban and a rural site sixty-five miles apart. This implies that the PM{sub 2.5} levels appear to be impacted more by regional than by local effects; (3) The absolute median PM{sub 2.5} levels were slightly higher for Lawrenceville than for Holbrook, implying that local urban environmental contributions had a minor but measurable effect on total PM{sub 2.5} mass concentration; (4) PM{sub 2.5} and PM{sub 10} mass concentration levels were consistently higher in summer than in winter, with intermediate levels observed in the spring and fall; (5) Sulfate levels predominated in the speciation data obtained from both the Holbrook and the Lawrenceville sites during winter and summer intensive sampling. Sulfate level measured at Holbrook were higher than those taken at Lawrenceville regardless of the season; (6) Ammonium levels remained relatively constant between seasons and between sites; (7) Nitrate levels measured at Lawrenceville were higher than those measured at Holbrook during winter intensive sampling. Nitrate levels measured during the summer intensive period were found to be very low at both locations; (8) In general, the predominant inorganic fraction of the samples analyzed could be described as being composed of a mixture of ammonium bisulfate and ammonium sulfate with minor amounts of ammonium nitrate; (9) The PM10 fraction had a larger percentage of geological material and a smaller percentage of condensable material (ammonium bisulfate, ammonium sulfate, ammonium nitrate and total carbon species) than the PM{sub 2.5} fraction for samples collected in winter at Lawrenceville; and (10) Most high PM{sub 2.5} episodes occurred when the predominating wind direction was from the South-West. (11) Plots of ozone vs. NO{sub x} suggest chemical reaction between these molecules since a high concentration of one always results in a low concentration of the other. The analysis of the acquired data has so far addressed three of the four scientific questions originally posed. More data analysis is on-going including the correlation between O{sub 3} and PM{sub 2.5} levels and the correlation of mass data with meteorological observations.

Unknown

2002-04-30T23:59:59.000Z

124

Particulate Matter in Antarctic Snow  

Science Journals Connector (OSTI)

......1 8.0 0.35 7.2 0.080 Camp Century (Greenland 77" N 61"W) 37...1 Amundsen-Scott 1 Plateau 1 Camp Century 1 SeaWater(Na 1.05%) 1 Terrestrial...1-3 4.0 6.9 0.35 7.2 Camp Century 0 4.7 37 21 0.027 10.6 0......

D. W. Parkin; D. R. Phillips

1972-05-01T23:59:59.000Z

125

Particulate Matter in Antarctic Snow  

Science Journals Connector (OSTI)

......blocks being parcelled in precleaned aluminium foil prior to storage in washed-out galvanized iron boxes. These sealed boxes...Roi Baudouin 1 Amundsen-Scott 1 Plateau 1 Camp Century 1 SeaWater(Na 1.05%) 1 Terrestrial (Na 2.83%) 1 Chondritic......

D. W. Parkin; D. R. Phillips

1972-05-01T23:59:59.000Z

126

Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel Consumption, Wins R&D 100 Award  

Office of Energy Efficiency and Renewable Energy (EERE)

Radio Frequency Diesel Particulate Filter Sensor (RF-DPF) is a sensor that uses radio frequencies to measure the amount and distribution of soot and ash in the filters that remove particulate matter from the exhaust of diesel engines.

127

The effect of lubricant derived ash on the catalytic activity of diesel particulate filters  

E-Print Network (OSTI)

A diesel particulate filter (DPF) is an aftertreatment device used to remove hazardous particulate matter (PM) from diesel engine exhaust. Modem emission restrictions have limited the acceptable amount of PM output by ...

Murray, Timothy Quinn

2014-01-01T23:59:59.000Z

128

Diesel particulate filters  

Science Journals Connector (OSTI)

Is the broad market introduction of diesel particulate filters throughout Europe wishful thinking or reality? The challenges facing the introduction of diesel particulate filters with a fuel-borne catalyst...

Pierre Macaudičre; Laurent Rocher; Wolfgang Naschke

2004-04-01T23:59:59.000Z

129

NETL: Control Technology: Advanced Hybrid Particulate Collector  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Hybrid Particulate Collector Advanced Hybrid Particulate Collector Under DOE-NETL sponsorship, the University of North Dakota, Energy and Environmental Research Center (UND-EERC) has developed a new concept in particulate control, called an advanced hybrid particulate collector (AHPC). In addition to DOE and the EERC, the project team includes W.L. Gore & Associates, Inc., Allied Environmental Technologies, Inc., and the Otter Tail Power Company. The AHPC utilizes both electrostatic collection and filtration in a unique geometric configuration that achieves ultrahigh particle collection with much less collection area than conventional particulate control devices. The primary technologies for state-of-the-art particulate control are fabric filters (baghouses) and electrostatic precipitators (ESPs). A major limitation of ESPs is that the fractional penetration of 0.1- to 1.0-µm particles is typically at least an order of magnitude greater than for 10-µm particles, so a situation exists where the particles that are of greatest health concern are collected with the lowest efficiency. Fabric filters are currently considered to be the best available control technology for fine particles, but emissions are dependent on ash properties and typically increase if the air-to-cloth (A/C) ratio is increased. In addition, many fabrics cannot withstand the rigors of high-SO2 flue gases, which are typical for bituminous fuels. Fabric filters may also have problems with bag cleanability and high pressure drop, which has resulted in conservatively designed, large, costly baghouses.

130

E-Print Network 3.0 - airborne particulates european Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

de mathmatiques Collection: Mathematics 12 Statistical Issues in the Study of Air Pollution Involving Airborne Particulate Matter Summary: Statistical Issues in the Study of...

131

E-Print Network 3.0 - airborne particulates impact Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

public health threat of air pollution Summary: . Currently there are six "criteria pollutants" for air pollution: PM10 (defined as particulate matter... a more specific human...

132

Fine Particles in Soils  

NLE Websites -- All DOE Office Websites (Extended Search)

Fine Particles in Soils Fine Particles in Soils Nature Bulletin No. 582 November 28, 1959 Forest Preserve District of Cook County Daniel Ryan, President Roberts Mann, Conservation Editor David H. Thompson, Senior Naturalist FINE PARTICLES IN SOILS If a farmer, while plowing, is visited in the field by another farmer, invariably the visitor will pick up a handful of turned over earth and knead it with his fingers while they talk. The "feel" of it tells him a lot about the texture and structure of that soil. He knows that both are important factors in the growth of plants and determine the crops that may be obtained from the land. Soil is a combination of three different things About half of it is solid matter; the other half consists of air and water The solid portion is composed of organic and inorganic materials.

133

Chemopreventive activity of compounds extracted from Casearia sylvestris (Salicaceae) Sw against DNA damage induced by particulate matter emitted by sugarcane burning near Araraquara, Brazil  

SciTech Connect

Ethanolic extract of Casearia sylvestris is thought to be antimutagenic. In this study, we attempted to determine whether this extract and casearin X (a clerodane diterpene from C. sylvestris) are protective against the harmful effects of airborne pollutants from sugarcane burning. To that end, we used the Tradescantia micronucleus test in meiotic pollen cells of Tradescantia pallida, the micronucleus test in mouse bone marrow cells, and the comet assay in mouse blood cells. The mutagenic compound was total suspended particulate (TSP) from air. For the Tradescantia micronucleus test, T. pallida cuttings were treated with the extract at 0.13, 0.25, or 0.50 mg/ml. Subsequently, TSP was added at 0.3 mg/ml, and tetrads from the inflorescences were examined for micronuclei. For the micronucleus test in mouse bone marrow cells and the comet assay in mouse blood cells, Balb/c mice were treated for 15 days with the extract—3.9, 7.5, or 15.0 mg/kg body weight (BW)—or with casearin X—0.3, 0.25, or 1.2 mg/kg BW—after which they received TSP (3.75 mg/kg BW). In T. pallida and mouse bone marrow cells, the extract was antimutagenic at all concentrations tested. In mouse blood cells, the extract was antigenotoxic at all concentrations, whereas casearin X was not antimutagenic but was antigenotoxic at all concentrations. We conclude that C. sylvestris ethanolic extract and casearin X protect DNA from damage induced by airborne pollutants from sugarcane burning. -- Highlights: ? We assessed DNA protection of C. sylvestris ethanolic extract. ? We assessed DNA protection of casearin X. ? We used Tradescantia pallida micronucleus test as screening. ? We used comet assay and micronucleus test in mice. ? The compounds protected DNA against sugar cane burning pollutants.

Prieto, A.M. [UNESP — Univ. Estadual Paulista, College of Pharmaceutical Sciences, Department of Clinical Analysis, Rua Expedicionários do Brasil, 1621, Araraquara (Brazil)] [UNESP — Univ. Estadual Paulista, College of Pharmaceutical Sciences, Department of Clinical Analysis, Rua Expedicionários do Brasil, 1621, Araraquara (Brazil); Santos, A.G. [UNESP — Univ. Estadual Paulista, College of Pharmaceutical Sciences, Department of Natural Principles and Toxicology, Rodovia Araraquara-Jau, km 01, Araraquara (Brazil)] [UNESP — Univ. Estadual Paulista, College of Pharmaceutical Sciences, Department of Natural Principles and Toxicology, Rodovia Araraquara-Jau, km 01, Araraquara (Brazil); Csipak, A.R.; Caliri, C.M.; Silva, I.C. [UNESP — Univ. Estadual Paulista, College of Pharmaceutical Sciences, Department of Clinical Analysis, Rua Expedicionários do Brasil, 1621, Araraquara (Brazil)] [UNESP — Univ. Estadual Paulista, College of Pharmaceutical Sciences, Department of Clinical Analysis, Rua Expedicionários do Brasil, 1621, Araraquara (Brazil); Arbex, M.A. [UNIFESP — Federal University of Săo Paulo, Paulista College of Medicine, Department of Internal Medicine, Rua Pedro de Toledo, 720, Săo Paulo (Brazil)] [UNIFESP — Federal University of Săo Paulo, Paulista College of Medicine, Department of Internal Medicine, Rua Pedro de Toledo, 720, Săo Paulo (Brazil); Silva, F.S.; Marchi, M.R.R. [UNESP — Univ. Estadual Paulista, Chemistry Institute, Department of Analytical Chemistry, Rua Francisco Degni, S/N, Araraquara (Brazil)] [UNESP — Univ. Estadual Paulista, Chemistry Institute, Department of Analytical Chemistry, Rua Francisco Degni, S/N, Araraquara (Brazil); Cavalheiro, A.J.; Silva, D.H.S.; Bolzani, V.S. [UNESP — Univ. Estadual Paulista, Chemistry Institute, Department of Organic Chemistry, Rua Francisco Degni, S/N, Araraquara (Brazil)] [UNESP — Univ. Estadual Paulista, Chemistry Institute, Department of Organic Chemistry, Rua Francisco Degni, S/N, Araraquara (Brazil); Soares, C.P., E-mail: soarescp@hotmail.com [UNESP — Univ. Estadual Paulista, College of Pharmaceutical Sciences, Department of Clinical Analysis, Rua Expedicionários do Brasil, 1621, Araraquara (Brazil)

2012-12-15T23:59:59.000Z

134

Effect of Diesel Oxidation Catalysts on the Diesel Particulate Filter Regeneration Process  

Science Journals Connector (OSTI)

Effect of Diesel Oxidation Catalysts on the Diesel Particulate Filter Regeneration Process ... A Diesel Particulate Filter (DPF) regeneration process was investigated during aftertreatment exhaust of a simulated diesel engine under the influence of a Diesel Oxidation Catalyst (DOC). ... Diesel particulate matter (PM) significantly contributes to urban air pollution and has often been associated with adverse health effects. ...

Leonardo Lizarraga; Stamatios Souentie; Antoinette Boreave; Christian George; Barbara D’Anna; Philippe Vernoux

2011-11-03T23:59:59.000Z

135

Direct Capillary Gas Chromatography of Filter-Borne Particulate Emissions from Diesel Engines  

Science Journals Connector (OSTI)

......Filter-Borne Particulate Emissions from Diesel Engines R.D. Cuthbertson P.R. Shore...Filter-Borne Particulate Emissions from Diesel Engines R.D. Cuthbertson and P.R...oil-derived material. Introduction Diesel engines emit particulate matter consisting......

R.D. Cuthbertson; P.R. Shore

1988-03-01T23:59:59.000Z

136

Developing an accelerated aging system for gasoline particulate filters and an evaluation test for effects on engine performance  

E-Print Network (OSTI)

Stringent regulations worldwide will limit the level of particulate matter (PM) emitted from gasoline engines equipped with direct fuel injection. Gasoline particulate filters (GPFs) present one strategy for meeting PM ...

Jorgensen, James E. (James Eastman)

2014-01-01T23:59:59.000Z

137

Argonne TTRDC - Engines - Emissions Control - Advanced Diesel Particulate  

NLE Websites -- All DOE Office Websites (Extended Search)

Development of Advanced Diesel Particulate Filtration Systems Development of Advanced Diesel Particulate Filtration Systems The U.S. Environmental Protection Agency regulations require that on-highway diesel vehicles have filtration systems to reduce tail-pipe soot emissions, known as particulate matter (PM). Diesel particulate filtration (DPF) systems are currently the most efficient at directly controlling PM. Argonne researchers, working with Corning, Inc., and Caterpillar, Inc., through a cooperative research and development agreement, are exploiting previously unavailable technology and research results on diesel PM filtration and regeneration processes, aiming to the technology transfer of advanced PM emission control to industry. Argonne's Research In operation of DPF systems, the filtration and regeneration of particulate emissions are the key processes to be controlled for high efficiency. Due to difficulties in accessing the micro-scaled structures of DPF membranes and monitoring particulate filtration and high-temperature thermal processes, however, research has been limited to macroscopic observation for the product.

138

Exploring relationships between outdoor air particulate-associated  

NLE Websites -- All DOE Office Websites (Extended Search)

Exploring relationships between outdoor air particulate-associated Exploring relationships between outdoor air particulate-associated polycyclic aromatic hydrocarbon and PM2.5: A case study of benzo(a)pyrene in California metropolitan regions Title Exploring relationships between outdoor air particulate-associated polycyclic aromatic hydrocarbon and PM2.5: A case study of benzo(a)pyrene in California metropolitan regions Publication Type Journal Article LBNL Report Number LBNL-514E Year of Publication 2008 Authors Lobscheid, Agnes B., Thomas E. McKone, and D. A. Valleroc Journal Atmospheric Environment Volume 41 Start Page Chapter Pagination 5659-5672 Abstract Polycyclic aromatic hydrocarbons (PAHs) and particulate matter (PM) are co-pollutants emitted as by-products of combustion processes. Convincing evidence exists for PAHs as a primary toxic component of fine PM (PM2.5). Because PM2.5 is listed by the US EPA as a "Criteria Pollutant," it is monitored regularly at sites nationwide. In contrast, very limited data is available on measured ambient air concentrations of PAHs. However, between 1999-2001, ambient air concentrations of PM2.5 and benzo(a)pyrene (BaP) are available for California locations. We use multivariate linear regression models (MLRMs) to predict ambient air levels of BaP in four air basins based on reported PM2.5 concentrations and spatial, temporal and meteorological variables as variates. We obtain an R2 ranging from 0.57-0.72 among these basins. Significant variables (p<0.05) include the average daily PM2.5 concentration, wind speed, temperature and relative humidity, and the coastal distance as well as season, and holiday or weekend. Combining the data from all sites and using only these variables to estimate ambient BaP levels, we obtain an R2 of 0.55. These R2-values, combined with analysis of the residual error and cross validation using the PRESS-statistic, demonstrate the potential of our method to estimate reported outdoor air PAH exposure levels in metropolitan regions. These MLRMs provide a first step towards relating outdoor ambient PM2.5 and PAH concentrations for epidemiological studies when PAH measurements are unavailable, or limited in spatial coverage, based on publicly available meteorological and PM2.5 data

139

Particulate hot gas stream cleanup technical issues  

SciTech Connect

The analyses of hot gas stream cleanup particulate samples and descriptions of filter performance studied under this contract were designed to address problems with filter operation that have been linked to characteristics of the collected particulate matter. One objective of this work was to generate an interactive, computerized data bank of the key physical and chemical characteristics of ash and char collected from operating advanced particle filters and to relate these characteristics to the operation and performance of these filters. The interactive data bank summarizes analyses of over 160 ash and char samples from fifteen pressurized fluidized-bed combustion and gasification facilities utilizing high-temperature, high pressure barrier filters.

Pontius, D.H.; Snyder, T.R.

1999-09-30T23:59:59.000Z

140

Pitch based foam with particulate  

DOE Patents (OSTI)

A thermally conductive, pitch based foam composite having a particulate content. The particulate alters the mechanical characteristics of the foam without severely degrading the foam thermal conductivity. The composite is formed by mixing the particulate with pitch prior to foaming.

Klett, James W. (Knoxville, TN)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Method for immobilizing particulate materials in a packed bed  

DOE Patents (OSTI)

The present invention pertains generally to immobilizing particulate matter contained in a "packed" bed reactor so as to prevent powder migration, compaction, coalescence, or the like. More specifically, this invention relates to a technique for immobilizing particulate materials using a microporous foam-like polymer such that a) the particulate retains its essential chemical nature, b) the local movement of the particulate particles is not unduly restricted, c) bulk powder migration and is prevented, d) physical and chemical access to the particulate is unchanged over time, and e) very high particulate densities are achieved. The immobilized bed of the present invention comprises a vessel for holding particulate matter, inlet and an outlet ports or fittings, a loosely packed bed of particulate material contained within the vessel, and a three dimensional porous matrix for surrounding and confining the particles thereby fixing the movement of individual particle to a limited local position. The established matrix is composed of a series of cells or chambers comprising walls surrounding void space, each wall forming the wall of an adjacent cell; each wall containing many holes penetrating through the wall yielding an overall porous structure and allowing useful levels of gas transport.

Even, Jr., William R. (Livermore, CA); Guthrie, Stephen E. (Livermore, CA); Raber, Thomas N. (Livermore, CA); Wally, Karl (Lafayette, CA); Whinnery, LeRoy L. (Livermore, CA); Zifer, Thomas (Manteca, CA)

1999-01-01T23:59:59.000Z

142

Air Pollution Control Regulations: No. 13- Particulate Emissions from Fossil Fuel Fired Steam or Hot Water Generating Units (Rhode Island)  

Energy.gov (U.S. Department of Energy (DOE))

The purpose of this regulation is to limit emissions of particulate matter from fossil fuel fired and wood-fired steam or hot water generating units.

143

Final Report: Particulate Emissions Testing, Unit 1, Potomac River  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Final Report: Particulate Emissions Testing, Unit 1, Potomac River Final Report: Particulate Emissions Testing, Unit 1, Potomac River Generating Station, Alexandria, Virginia Final Report: Particulate Emissions Testing, Unit 1, Potomac River Generating Station, Alexandria, Virginia Docket No. EO-05-01: TRC Environmental Corporation (TRC) of Lowell, Massachusetts was retained by Mirant Potomac River, LLC (Mirant) to provide sampling and analytical support in completing a Particulate Emission Test of Unit 1 of the Potomac River generating facility. The Test Program at the Potomac facility involved the completion of two series of emissions tests for particulate matter (PM), the first during normal unit operation and the second with the injection of TRONA upstream of hot side ESP fields. All tests were completed while Unit 1 was operating at 90% of full load (84MW)

144

Particulate contamination removal from wafers using plasmas and mechanical agitation  

DOE Patents (OSTI)

Particulate contamination removal from wafers is disclosed using plasmas and mechanical agitation. The present invention includes the use of plasmas with mechanical agitation for removing particulate matter from the surface of a wafer. The apparatus hereof comprises a mechanical activator, at least one conducting contact pin for transferring the vibration from the activator to the wafer, clamp fingers that maintain the wafer`s position, and means for generating a plasma in the vicinity of the surface of the wafer, all parts of the cleaning apparatus except the mechanical activator and part of the contact pin being contained inside the processing chamber. By exposing a wafer to a plasma and providing motion thereto in a direction perpendicular to its surface, the bonding between the particulate matter and the surface may be overcome. Once free of the wafer surface, the particulates become charged by electrons from the plasma and are drawn into the plasma by attractive forces which keep them from redepositing. The introduction of a flowing gas through the plasma sweeps the particulates away from the wafer and out of the plasma. The entire surface is cleaned during one cleaning step. The use of an rf plasma to accomplish the particulate removal was found to remove more than 90% of the particulates. 4 figs.

Selwyn, G.S.

1998-12-15T23:59:59.000Z

145

Particulate contamination removal from wafers using plasmas and mechanical agitation  

DOE Patents (OSTI)

Particulate contamination removal from wafers using plasmas and mechanical agitation. The present invention includes the use of plasmas with mechanical agitation for removing particulate matter from the surface of a wafer. The apparatus hereof comprises a mechanical activator, at least one conducting contact pin for transferring the vibration from the activator to the wafer, clamp fingers that maintain the wafer's position, and means for generating a plasma in the vicinity of the surface of the wafer, all parts of the cleaning apparatus except the mechanical activator and part of the contact pin being contained inside the processing chamber. By exposing a wafer to a plasma and providing motion thereto in a direction perpendicular to its surface, the bonding between the particulate matter and the surface may be overcome. Once free of the wafer surface, the particulates become charged by electrons from the plasma and are drawn into the plasma by attractive forces which keep them from redepositing. The introduction of a flowing gas through the plasma sweeps the particulates away from the wafer and out of the plasma. The entire surface is cleaned during one cleaning step. The use of an rf plasma to accomplish the particulate removal was found to remove more than 90% of the particulates.

Selwyn, Gary S. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

146

Automobiles - Particulate matter paradox ... | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

in Oak Ridge National Laboratory's Fuels, Engines and Emissions Research Center. GDI engines inject fuel directly into the cylinder, increasing efficiency and compatibility...

147

Electrically-Assisted Diesel Particulate Filter Regeneration...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

More Documents & Publications Substrate Studies of an Electrically-Assisted Diesel Particulate Filter Electrically-Assisted Diesel Particulate Filter Regeneration...

148

JV Task 95-Particulate Control Consulting for Minnesota Ore Operations  

SciTech Connect

The purpose of the project was to assist U.S. Steel in the evaluation, selection, planning, design, and testing of potential approaches to help meet U.S. Steel's goal for low-particulate matter emissions and regulatory compliance. The energy-intensive process for producing iron pellets includes treating the pellets in high-temperature kilns in which the iron is converted from magnetite to hematite. The kilns can be fired with either natural gas or a combination of gas and coal or biomass fuel and are equipped with wet venturi scrubbers for particulate control. Particulate measurements at the inlet and outlet of the scrubbers and analysis of size-fractionated particulate samples led to an understanding of the effect of process variables on the measured emissions and an approach to meet regulatory compliance.

Stanley Miller

2008-10-31T23:59:59.000Z

149

RETORT WATER PARTICULATES  

E-Print Network (OSTI)

Effluents from In Situ Oil Shale Processing. Proceedings ofDecomposition of Colorado Oil Shale: II, Carbonate Minerals.Suspension of Spent Shale Fines and Oil~ Oil shale becomes

2011-01-01T23:59:59.000Z

150

RETORT WATER PARTICULATES  

E-Print Network (OSTI)

62 (from an inert gas run using Utah shale) produce a highfrom an inert gas run using Antrim shale) produced a highhot combustion gases may release spent shale fines which are

2011-01-01T23:59:59.000Z

151

E-Print Network 3.0 - airborne fungi particulate Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

<< < 1 2 3 4 5 > >> 1 Correlating Bioaerosol Load with PM2.5 and PM10 Concentrations Jordan Peccia1, Ann M. Dillner1,2, Justin Boreson1 Summary: of airborne particulate matter....

152

E-Print Network 3.0 - airborne particulates Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

<< < 1 2 3 4 5 > >> 1 Correlating Bioaerosol Load with PM2.5 and PM10 Concentrations Jordan Peccia1, Ann M. Dillner1,2, Justin Boreson1 Summary: of airborne particulate matter....

153

Electrically heated particulate filter with reduced stress  

DOE Patents (OSTI)

A system comprises a particulate matter (PM) filter comprising an inlet for receiving exhaust gas. A zoned heater is arranged in the inlet and comprises a resistive heater comprising N zones, where N is an integer greater than one. Each of the N zones comprises M sub-zones, where M is an integer greater than one. A control module selectively activates one of the N zones to initiate regeneration in downstream portions of the PM filter from the one of the N zones and deactivates others of the N zones.

Gonze, Eugene V.

2013-03-05T23:59:59.000Z

154

Pleated Ceramic Fiber Diesel Particulate Filter | Department...  

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

Pleated Ceramic Fiber Diesel Particulate Filter Pleated Ceramic Fiber Diesel Particulate Filter 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and Posters...

155

Particle Number & Particulate Mass Emissions Measurements on...  

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

Number & Particulate Mass Emissions Measurements on a 'Euro VI' Heavy-duty Engine using the PMP Methodologies Particle Number & Particulate Mass Emissions Measurements on a 'Euro...

156

Particulate Emissions Control by Advanced Filtration Systems...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Particulate Emissions Control by Advanced Filtration Systems or GDI Engines Particulate Emissions Control by Advanced Filtration Systems or GDI Engines 2013 DOE Hydrogen and Fuel...

157

Analytical solutions for the trajectories and thermal histories of unforced particulates  

Science Journals Connector (OSTI)

Dilute suspensions of finely dispersed particulates are found in many engineering applications. This article shows that the nonlinear equations of motion and heat transfer for the particles may be solved analytically for certain realistic drag and heat transfer functions under idealized conditions. Some applications are discussed.

Lawrence D. Cloutman

1988-01-01T23:59:59.000Z

158

Distribution, mixing behavior, and transformation of dissolved inorganic phosphorus and suspended particulate phosphorus along a salinity gradient in the Changjiang Estuary  

Science Journals Connector (OSTI)

Abstract Surface water and suspended particulate matter (SPM) samples were collected along a salinity gradient in the Changjiang Estuary in June, 2011 to examine the distribution, mixing behavior and transformation of dissolved and particulate phosphorus (P) species. Particulate P was fractionated into five size fractions using a water elutriation method, followed by a sequential extraction procedure (SEDEX). Dissolved inorganic P (DIP) concentrations ranged from 0.53 to 3.02 ?mol L? 1 with a mean of 1.44 ?mol L? 1, while total particulate P (TPP) concentrations ranged from 20.56 to 26.90 ?mol L? 1 (24.21 ?mol L? 1). The variation of DIP and P species in both bulk and size fractionated particles along the salinity gradient indicated a significant transformation between different P phases, especially for labile P such as exchangeable P (Ex-P), organic P (Or-P) and Fe-bound P (Fe-P) in a particulate P pool. Among all P forms, detrital P (De-P) and Or-P in SPM were the most abundant, accounting for 43.9% and 26.1% of TPP in bulk particles. De-P increased with increasing particle grain size, with an average concentration of 8.92 ± 2.20 ?mol g? 1 in the clay fraction ( 63 ?m), whereas Or-P and other P forms decreased gradually with increasing grain size. The average concentration of Or-P in clay fraction was 6.93 ± 1.92 ?mol g? 1 and it decreased to 1.59 ± 0.61 ?mol g? 1 in the sand fraction. The flux of bioavailable P (BAP, sum of Ex-P, Or-P and Fe-P) in clay fraction (< 8 ?m), defined as “truly” suspended particles, was estimated to be 0.21 × 104 t P yr? 1 and accounted for 29% of the bulk BAP flux. The particulate P to specific surface area ratios (P/SSA) was lower in fine suspended particles than in coarse particles, indicating lower preservation of P in these particles. When compared with the bed sediments of the Changjiang Estuary, the P/SSA loadings in fractionated suspended particles were maintained at the same level for De-P and Fe-P, slightly higher for authigenic P (Au-P) and refractory P (Re-P) and obviously higher for labile P such as Ex-P and Or-P, further indicating the differential behavior of P forms during particle settlement in this dynamic estuary.

Jia Meng; Zhigang Yu; Qingzhen Yao; Thomas S. Bianchi; Adina Paytan; Bin Zhao; Huihui Pan; Peng Yao

2014-01-01T23:59:59.000Z

159

High Efficiency Particulate Air Filters  

NLE Websites -- All DOE Office Websites (Extended Search)

High Efficiency Particulate Air (HEPA) Filters High Efficiency Particulate Air (HEPA) Filters Home Standards DOE Workshops Nuclear Air Cleaning Conference Proceedings Qualified Filter List News Items Related Sites HEPA Related Lessons Learned Contact Us HSS Logo High Efficiency Particulate Air Filters The HEPA Filter web site provides a forum for informing and reporting department-wide activities related to filtration and ventilation issues with special reference to the High Efficiency Particulate Air (HEPA) Filters' use, inspection, and testing. This site contains essentials of DOE HEPA filter test program, procedures, requirements and quality assurance aspects applicable to HEPA filters used in DOE facilities. This site contains information about the DOE-accepted Filter Test Facility and its management, operation and quality assuranceprogram.

160

Particulate Contaminant Descriptions and Definitions  

Science Journals Connector (OSTI)

Particulate contaminants can be either solid or liquid. Many of these materials were originally suspended in air or in a process fluid; others derive from nearby sources, such as activities of personnel working i...

Alvin Lieberman

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Investigations of release phenomenon of volatile organic compounds and particulates from residual storage chip piles  

SciTech Connect

This paper outlines the method for estimating Particulate Matter and Volatile Organic Compounds (VOCs) emissions from wood handling and storage operations at a pulp mill. Fugitive particulate matter emissions from wood handling and storage operations are due to material load/dropout operations, wind erosion from storage piles and vehicular traffic on paved roads. The particulate matter emissions are a function of a number of variables like windspeed, surface moisture content, material silt content, and number of days of precipitation. Literature review attributes VOC emissions to biological, microbiological, chemical, and physical processes occurring in wood material storage pile. The VOC emissions are from the surface of these piles and the VOC released during retrieval of chips from the pile. VOC emissions are based on the chip throughput, number of turnovers, moisture content and surface area of the pile. The emission factors with the requisite calculation methodology to be utilized for quantifying VOC emissions from chip piles has been discussed in this paper.

Mohan, S.; Nagarkatti, M. [Trinity Consultants, Inc., Baton Rouge, LA (United States)

1996-12-31T23:59:59.000Z

162

Method for the Removal of Ultrafine Particulates from an Aqueous Suspension  

SciTech Connect

A method of separating ultra-fine particulate from an aqueous suspension such as a process stream or a waste stream. The method involves the addition of alkali silicate and an organic gelling agent to a volume of liquid, from the respective process or waste stream, to form a gel. The gel then undergoes syneresis to remove water and soluble salts from the gel-containing the particulate, thus, forming a silica monolith. The silica monolith is then sintered to form a hard, nonporous waste form.

Chaiko, David J.; Kopasz, John P.; Ellison, Adam J.G.

1999-03-05T23:59:59.000Z

163

Process for particulate removal from coal liquids  

DOE Patents (OSTI)

Suspended solid particulates are removed from liquefied coal products by first subjecting such products to hydroclone action for removal in the underflow of the larger size particulates, and then subjecting the overflow from said hydroclone action, comprising the residual finer particulates, to an electrostatic field in an electrofilter wherein such finer particulates are deposited in the bed of beads of dielectric material on said filter. The beads are periodically cleaned by backwashing to remove the accumulated solids.

Rappe, Gerald C. (Macungie, PA)

1983-01-01T23:59:59.000Z

164

Preserving Diesel Exhaust Ultrafine (Nano-) Particulate Structure...  

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

Preserving Diesel Exhaust Ultrafine (Nano-) Particulate Structure in Genotoxicity Studies to Support Engineering Development of Emission Controls Preserving Diesel Exhaust...

165

Durability of Diesel Particulate Filters - Bench Studies on Cordierite...  

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

& Publications Requirements-Driven Diesel Catalyzed Particulate Trap Design and Optimization Development of Advanced Diesel Particulate Filtration (DPF) Systems fundamental...

166

A Neo-Rumsfeldian Framework for the Thermodynamics of Organic Particulate  

NLE Websites -- All DOE Office Websites (Extended Search)

A Neo-Rumsfeldian Framework for the Thermodynamics of Organic Particulate A Neo-Rumsfeldian Framework for the Thermodynamics of Organic Particulate Matter Formation in the Atmosphere: Successes and Challenges Speaker(s): James F. Pankow Date: March 6, 2008 - 12:00pm Location: 90-3122 James F. Pankow. The thermodynamic principles according to which organic particulate matter (OPM) forms in the atmosphere have become well identified because of research progress made since about the mid 1990s. These are, ahem, known knowns. However, many unknowns exist regarding the concentrations and chemical characteristics of the biogenic and anthropogenic compounds present in the atmosphere that are important in OPM formation. In this context, since we know what we need to know more about, these are, well, known unknowns. Other known important unknowns are

167

Electrically heated particulate filter with zoned exhaust flow control  

DOE Patents (OSTI)

A system includes a particulate matter (PM) filter that includes X zones. An electrical heater includes Y heater segments that are associated with respective ones of the X zones. The electrical heater is arranged upstream from and proximate with the PM filter. A valve assembly includes Z sections that are associated with respective ones of the X zones. A control module adjusts flow through each of the Z sections during regeneration of the PM filter via control of the valve assembly. X, Y and Z are integers.

Gonze, Eugene V [Pinckney, MI

2012-06-26T23:59:59.000Z

168

Diesel particulate filter with zoned resistive heater  

DOE Patents (OSTI)

A diesel particulate filter assembly comprises a diesel particulate filter (DPF) and a heater assembly. The DPF filters a particulate from exhaust produced by an engine. The heater assembly has a first metallic layer that is applied to the DPF, a resistive layer that is applied to the first metallic layer, and a second metallic layer that is applied to the resistive layer. The second metallic layer is etched to form a plurality of zones.

Gonze, Eugene V [Pinckney, MI

2011-03-08T23:59:59.000Z

169

Zone heated diesel particulate filter electrical connection  

DOE Patents (OSTI)

An electrical connection system for a particulate filter is provided. The system includes: a particulate filter (PF) disposed within an outer shell wherein the PF is segmented into a plurality of heating zones; an outer mat disposed between the particulate filter and the outer shell; an electrical connector coupled to the outer shell of the PF; and a plurality of printed circuit connections that extend along the outer surface of the PF from the electrical connector to the plurality of heating zones.

Gonze, Eugene V. (Pinckney, MI); Paratore, Jr., Michael J. (Howell, MI)

2010-03-30T23:59:59.000Z

170

Electrically-Assisted Diesel Particulate Filter Regeneration...  

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

Evaluation pm041lance2011p.pdf More Documents & Publications Electrically-Assisted Diesel Particulate Filter Regeneration Substrate Studies of an Electrically-Assisted Diesel...

171

Electrically heated particulate filter embedded heater design  

DOE Patents (OSTI)

An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine and wherein an upstream surface of the particulate filter includes machined grooves. A grid of electrically resistive material is inserted into the machined grooves of the exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF.

Gonze, Eugene V.; Chapman, Mark R.

2014-07-01T23:59:59.000Z

172

Electrically heated particulate filter using catalyst striping  

DOE Patents (OSTI)

An exhaust system that processes exhaust generated by an engine is provided. The system generally includes a particulate filter (PF) that filters particulates from the exhaust wherein an upstream end of the PF receives exhaust from the engine. A grid of electrically resistive material is applied to an exterior upstream surface of the PF and selectively heats exhaust passing through the grid to initiate combustion of particulates within the PF. A catalyst coating is applied to the PF that increases a temperature of the combustion of the particulates within the PF.

Gonze, Eugene V; Paratore, Jr., Michael J; Ament, Frank

2013-07-16T23:59:59.000Z

173

Methods of separating particulate residue streams  

DOE Patents (OSTI)

A particulate residue separator and a method for separating a particulate residue stream may include an air plenum borne by a harvesting device, and have a first, intake end and a second, exhaust end; first and second particulate residue air streams that are formed by the harvesting device and that travel, at least in part, along the air plenum and in a direction of the second, exhaust end; and a baffle assembly that is located in partially occluding relation relative to the air plenum and that substantially separates the first and second particulate residue air streams.

Hoskinson, Reed L. (Rigby, ID); Kenney, Kevin L. (Idaho Falls, ID); Wright, Christopher T. (Idaho Falls, ID); Hess, J. Richard (Idaho Falls, ID)

2011-04-05T23:59:59.000Z

174

Modeling of Particulate Matter Emissions from Agricultural Operations  

E-Print Network (OSTI)

. In this research, a process was developed to determine distances from emitting sources to where the estimated concentrations were less than the National Ambient Air Quality Standards (NAAQS). These distances are a function of emission rates and meteorological...

Bairy, Jnana 1988-

2013-01-02T23:59:59.000Z

175

Fuel-Neutral Studies of Particulate Matter Transport Emissions  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

80 100 120 HighLoad HighLoadTD HighloadEvch MedLoad MedLoadTD MedLoadEvCh Vacuum Aerodynamic Diameter nm Joint experiments at U of Wisc ERC - Results (4) Only exception was...

176

Fuel-Neutral Studies of Particulate Matter Transport Emissions  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

APM (select by particle mass - new in second round tests) SPLAT-II (measures aerodynamic size, mass spectrum for each particle) Huge number of particles (O10 6 ) Real time...

177

Effects of Advanced Combustion Technologies on Particulate Matter...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1.7 L TDI with full-pass control - HCCI: single cylinder research engine * Light Duty Ad Hoc modes 1-4 for PCCI * HCCI: 1800 RPM, varied fuel rate, intake T - Loads from 1.6 -...

178

THE SURFACE CHARGE OF PARTICULATE MATTER IN SEAWATER  

Science Journals Connector (OSTI)

surface on gas bubbles to become available as a nutrient for ..... strongly hydrated character. The bentonite and ..... bacteria on sand particles. J. Exp. Biol. 411:.

179

Assessing Exposures to Particulate Matter and Manganese in Welding Fumes  

E-Print Network (OSTI)

titanium and zinc; non-metal constituents such as fluorides and silica; and gases such as carbon monoxide

LIU, SA

2010-01-01T23:59:59.000Z

180

Magnetic quantification of urban pollution sources in atmospheric particulate matter  

Science Journals Connector (OSTI)

......with the total air volume V air pumped through...chiARM w tot)/V air. Figure 1 Results...increasing exposure to pollution sources have been...distances from fossil fuel power stations...However, the solution of eq. (2) is......

S. Spassov; R. Egli; F. Heller; D. K. Nourgaliev; J. Hannam

2004-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Fuel-Neutral Studies of Particulate Matter Transport Emissions  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Planned request for FY15 - 200K Barriers addressed for enabling of high-efficiency engine technology: B. Lack of cost-effective emission control C. Lack of modeling capability...

182

Emission factors for ammonia and particulate matter from broiler Houses  

E-Print Network (OSTI)

of ammonia will probably result in the emission of other odorants (e. g. volatile fatty acids. volatile amines, indole, phenol, sulfur-containing compounds). Ammonia is produced from the microbial breakdown of uric acid in poultry manure. The decomposition... sulfate (Barthelmie and Pryor, 1998). Additionally, ammonia is an odorant and conditions conducive to the production of ammonia will probably result in the emission of other odorants (e. g. volatile fatty acids, volatile amines, indole, phenol, sulfur...

Redwine, Jarah Suzanne

2001-01-01T23:59:59.000Z

183

Concentrations and Size Distributions of Particulate Matter Emissions...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Vehicles Home About Vehicle Technologies Office Plug-in Electric Vehicles & Batteries Fuel Efficiency & Emissions Alternative Fuels Modeling, Testing, Data & Results...

184

Fuel-Neutral Studies of Particulate Matter Transport Emissions  

Energy.gov (U.S. Department of Energy (DOE))

2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

185

Fuel-Neutral Studies of Particulate Matter Transport Emissions  

Energy.gov (U.S. Department of Energy (DOE))

2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation

186

Concentrations and Size Distributions of Particulate Matter Emissions...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

& Organic Carbon - PAHs and n-PAHs - Elemental Compounds - Ionic Species - Carbonyls - Dioxins and Furans - Bioassays Sampling System Diluted Exhaust 1 0 11 6 7 8 a 8 b 3 4 BXDX...

187

Particulate Matter Characteristics for Highly Dilute Stoichiometric GDI Engine Operations  

Energy.gov (U.S. Department of Energy (DOE))

The overall goal of this study is to help identify which conditions and potential mechanisms impede soot formation in GDI operations.

188

Fuel-Neutral Studies of Particulate Matter Transport Emissions  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

characterization with single-cylinder test engines, guided by industry Barrier: Lack of cost-effective emission control Objective: Seek to shorten development time of filtration...

189

Edinburgh Research Explorer Pulmonary diesel particulate increases susceptibility to  

E-Print Network (OSTI)

Edinburgh Research Explorer Pulmonary diesel particulate increases susceptibility to myocardial, MR & Gray, GA 2014, 'Pulmonary diesel particulate increases susceptibility to myocardial ischemia. Pulmonary diesel particulate increases susceptibility to myocardial ischemia/reperfusion injury via

Millar, Andrew J.

190

Detailed Assessment of Particulate Characteristics from Low-Temperatur...  

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

Detailed Assessment of Particulate Characteristics from Low-Temperature Combustion Engines Detailed Assessment of Particulate Characteristics from Low-Temperature Combustion...

191

Wiremesh Substrates for Enhanced Particulate Oxidation and Efficient...  

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

Wiremesh Substrates for Enhanced Particulate Oxidation and Efficient Urea SCR NOx Reduction Wiremesh Substrates for Enhanced Particulate Oxidation and Efficient Urea SCR NOx...

192

Development of SCR on Diesel Particulate Filter System for Heavy...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SCR on Diesel Particulate Filter System for Heavy Duty Applications Development of SCR on Diesel Particulate Filter System for Heavy Duty Applications Evaluation of a system...

193

Update on 2007 Diesel Particulate Measurement Research | Department...  

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

2007 Diesel Particulate Measurement Research Update on 2007 Diesel Particulate Measurement Research 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations and...

194

Expanded Capacity Microwave-Cleaned Diesel Particulate Filter...  

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

Expanded Capacity Microwave-Cleaned Diesel Particulate Filter Expanded Capacity Microwave-Cleaned Diesel Particulate Filter 2002 DEER Conference Presentation: Industrial Ceramic...

195

Predicting Thermal Stress in Diesel Particulate Filters | Department...  

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

Thermal Stress in Diesel Particulate Filters Predicting Thermal Stress in Diesel Particulate Filters 2004 Diesel Engine Emissions Reduction (DEER) Conference Presentation: Corning...

196

The State of the Science in Diesel Particulate Control | Department...  

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

The State of the Science in Diesel Particulate Control The State of the Science in Diesel Particulate Control 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations...

197

A New CFD Model for understanding and Managing Diesel Particulate...  

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

& Publications Substrate Studies of an Electrically-Assisted Diesel Particulate Filter Diesel Particulate Filter: A Success for Faurecia Exhaust Systems Vehicle Evaluation of...

198

Ultra-Lite Diesel Particulate Filter Cartridge for Reduced Regeneratio...  

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

Lite Diesel Particulate Filter Cartridge for Reduced Regeneration Time and Fuel Consumption Ultra-Lite Diesel Particulate Filter Cartridge for Reduced Regeneration Time and Fuel...

199

Neutron Imaging of Diesel Particulate Filters | Department of...  

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

Neutron Imaging of Diesel Particulate Filters Neutron Imaging of Diesel Particulate Filters Neutron computed tomography shows soot and ash loading in a cordierite diesel...

200

Local Soot Loading Distribution in Cordierite Diesel Particulate...  

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

Local Soot Loading Distribution in Cordierite Diesel Particulate Filters by Dynamic Neutron Radiography Local Soot Loading Distribution in Cordierite Diesel Particulate Filters by...

Note: This page contains sample records for the topic "fine particulate matter" 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

Non-Destructive Neutron Imaging to Analyze Particulate Filters...  

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

Neutron Imaging to Analyze Particulate Filters Non-Destructive Neutron Imaging to Analyze Particulate Filters Non-destructive, non-invasive imaging is being employed in the...

202

Durability of Diesel Engine Particulate Filters (Agreement ID...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Durability of Diesel Engine Particulate Filters (Agreement ID:10461) Durability of Diesel Engine Particulate Filters (Agreement ID:10461) 2013 DOE Hydrogen and Fuel Cells Program...

203

Improvement and Simplification of Diesel Particulate Filter System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and Simplification of Diesel Particulate Filter System using a Ceria-Based Fuel-Borne Catalyst in Serial Applications Improvement and Simplification of Diesel Particulate Filter...

204

Final Report: Particulate Emissions Testing, Unit 1, Potomac...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Final Report: Particulate Emissions Testing, Unit 1, Potomac River Generating Station, Alexandria, Virginia Final Report: Particulate Emissions Testing, Unit 1, Potomac River...

205

Vehicle Technologies Office Merit Review 2014: Particulate Emissions...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Particulate Emissions Control by Advanced Filtration Systems for GDI Engines Vehicle Technologies Office Merit Review 2014: Particulate Emissions Control by Advanced Filtration...

206

The effect of porosity on the mechanical properties of cordierite diesel particulate filter substrates  

SciTech Connect

Diesel particulate filter (DPF) technology depends on porous ceramic structures that trap the particulate matter in the diesel engine exhaust gas stream. The design of DPFs requires balancing the functional requirement of soot filtration with the mechanical properties and both are influenced by the porosity of the substrate. In addition, increasing the porosity of the substrate can assist with the catalytic washcoating, engine back pressure and engine efficiency. The effect of porosity on the elastic and fracture mechanical properties of cordierite based ceramic particulate filters was examined and will be described. Elastic modulus of DPF substrates was determined using resonant ultrasound spectroscopy while fracture toughness was characterized using the double-torsion test method. The interrelationships among specimen thickness, wall orientation, porosity and mechanical properties of the filter substrates will be discussed. A materials selection procedure to obtain filters with high thermal shock resistance and optimal mechanical properties will be described.

Shyam, Amit [ORNL; Lara-Curzio, Edgar [ORNL; Watkins, Thomas R [ORNL

2009-01-01T23:59:59.000Z

207

Continuous fine ash depressurization system  

DOE Patents (OSTI)

A system for depressurizing and cooling a high pressure, high temperature fine solid particles stream having entrained gas therein. In one aspect, the system has an apparatus for cooling the high pressure, high temperature fine solid particles stream having entrained gas therein and a pressure letdown device for depressurization by separating the cooled fine solid particles from a portion of the fine solid particles stream having entrained gas therein, resulting in a lower temperature, lower pressure outlet of solid particles for disposal or handling by downstream equipment.

Liu, Guohai (Birmingham, AL); Peng, Wan Wang (Birmingham, AL); Vimalchand, Pannalal (Birmingham, AL)

2011-11-29T23:59:59.000Z

208

POC-SCALE TESTING OF OIL AGGLOMERATION TECHNIQUES AND EQUIPMENT FOR FINE COAL PROCESSING  

SciTech Connect

This report covers the technical progress achieved from July 01, 1997 to September 30, 1997 on the POC-Scale Testing Agglomeration Techniques and Equipment for Fine Coal Processing project. Experimental procedures and test data for recovery of fine coal from coal fines streams generated at a commercial coal preparation plant are described. Two coal fines streams, namely Sieve Bend Effluent and Cyclone Overflow were investigated. The test results showed that ash was reduced by more than 50% at combustible matter recovery levels exceeding 95%.

NONE

1998-01-01T23:59:59.000Z

209

Method of producing particulate-reinforced composites and composties produced thereby  

DOE Patents (OSTI)

A process for producing particle-reinforced composite materials through utilization of an in situ reaction to produce a uniform dispersion of a fine particulate reinforcement phase. The process includes forming a melt of a first material, and then introducing particles of a second material into the melt and subjecting the melt to high-intenisty acoustic vibration. A chemical reaction initiates between the first and second materials to produce reaction products in the melt. The reaciton products comprise a solide particulate phase, and the high-intensity acoustic vibration fragments and/or separates the reaction products into solid particles that are dispersed in the melt and are smaller than the particles of the second material. Also encompassed are particles-reinforced composite materials produced by such a process.

Han, Qingyou; Liu, Zhiwei

2013-12-24T23:59:59.000Z

210

Relationship between meteorological variables and total suspended and heavy metal particulates in Little Rock, Arkansas  

E-Print Network (OSTI)

, gases, or a mixture of the three. a. Background Emphasis in the past has been on gaseous pollutants that have a direct and physiological effect on humans (Lave and Seskin, 1970). Natter of solid and liquid in the air constitute a small but important... portion of polluted city air. The solid particulate matter may: affect human health; enhance chemical reactions in the atmosphere; reduce visibility; increase precipitation, fog, and clouds; and cool the atmosphere (Peirson et al. , 1973; TVA, 1983...

Avery, Mary Gwendolyn

2012-06-07T23:59:59.000Z

211

Diesel emission control: Catalytic filters for particulate removal  

Science Journals Connector (OSTI)

The European diesel engine industry represents a vital sector across the Continent, with more than 2 million direct work positions and a turnover of over 400 billion Euro. Diesel engines provide large paybacks to society since they are extensively used to transport goods, services and people. In recent years increasing attention has been paid to the emissions from diesel engines which, like gasoline engine emissions, include carbon monoxide (CO), hydrocarbons (HC) and oxides of nitrogen (NOx). Diesel engines also produce significant levels of particulate matter (PM), which consists mostly of carbonaceous soot and a soluble organic fraction (SOF) of hydrocarbons that have condensed on the soot.Meeting the emission levels imposed for NOx and PM by legislation (Euro IV in 2005 and, in the 2008 perspective, Euro V) requires the development of a number of critical technologies to fulfill these very stringent emission limits (e.g. 0.005 g/km for PM). This review is focused on these innovative technologies with special reference to catalytic traps for diesel particulate removal.

Debora Fino

2007-01-01T23:59:59.000Z

212

Hot Gas Filtration of Fine and Ultra fine Particles with Liquid...  

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

Hot Gas Filtration of Fine and Ultra fine Particles with Liquid Phase Sintered SiC Ceramic DPF Hot Gas Filtration of Fine and Ultra fine Particles with Liquid Phase Sintered SiC...

213

DEVELOPMENT OF FINE PARTICULATE EMISSION FACTORS AND SPECIATION PROFILES FOR OIL AND GAS FIRED COMBUSTION SYSTEMS  

SciTech Connect

This report provides results from the second year of this three-year project to develop dilution measurement technology for characterizing PM2.5 (particles with aerodynamic diameter smaller than 2.5 micrometers) and precursor emissions from stationary combustion sources used in oil, gas and power generation operation. Detailed emission rate and chemical speciation tests results for a gas turbine, a process heater, and a commercial oil/gas fired boiler are presented. Tests were performed using a research dilution sampling apparatus and traditional EPA methods. A series of pilot tests were conducted to identify the constraints to reduce the size of current research dilution sampler for future stack emission tests. Based on the test results, a bench prototype compact dilution sampler developed and characterized in GE EER in August 2002.

Glenn England; Oliver Chang; Stephanie Wien

2002-02-14T23:59:59.000Z

214

When matter matters  

SciTech Connect

We study a recently proposed scenario for the early universe:Subluminal Galilean Genesis. We prove that without any other matter present in the spatially flat Friedmann universe, the perturbations of the Galileon scalar field propagate with a speed at most equal to the speed of light. This proof applies to all cosmological solutions — to the whole phase space. However, in a more realistic situation, when one includes any matter which is not directly coupled to the Galileon, there always exists a region of phase space where these perturbations propagate superluminally, indeed with arbitrarily high speed. We illustrate our analytic proof with numerical computations. We discuss the implications of this result for the possible UV completion of the model.

Easson, Damien A. [Department of Physics and School of Earth and Space Exploration and Beyond Center, Arizona State University, Tempe, AZ, 85287-1504 (United States); Sawicki, Ignacy [Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg Philosophenweg 16, 69120 Heidelberg (Germany); Vikman, Alexander, E-mail: easson@asu.edu, E-mail: ignacy.sawicki@uni-heidelberg.de, E-mail: alexander.vikman@cern.ch [CERN, Theory Division, CH-1211 Genčve 23 (Switzerland)

2013-07-01T23:59:59.000Z

215

Loss of Fine Particle Ammonium from Denuded Nylon Filters  

SciTech Connect

Ammonium is an important constituent of fine particulate mass in the atmosphere, but can be difficult to quantify due to possible sampling artifacts. Losses of semivolatile species such as NH4NO3 can be particularly problematic. In order to evaluate ammonium losses from aerosol particles collected on filters, a series of field experiments was conducted using denuded nylon and Teflon filters at Bondville, Illinois (February 2003), San Gorgonio, California (April 2003 and July 2004), Grand Canyon National Park, Arizona (May, 2003), Brigantine, New Jersey (November 2003), and Great Smoky Mountains National Park (NP), Tennessee (July–August 2004). Samples were collected over 24-hr periods. Losses from denuded nylon filters ranged from 10% (monthly average) in Bondville, Illinois to 28% in San Gorgonio, California in summer. Losses on individual sample days ranged from 1% to 65%. Losses tended to increase with increasing diurnal temperature and relative humidity changes and with the fraction of ambient total N(--III) (particulate NH4+ plus gaseous NH3) present as gaseous NH3. The amount of ammonium lost at most sites could be explained by the amount of NH4NO3 present in the sampled aerosol. Ammonium losses at Great Smoky Mountains NP, however, significantly exceeded the amount of NH4NO3 collected. Ammoniated organic salts are suggested as additional important contributors to observed ammonium loss at this location.

Yu, Xiao-Ying; Lee, Taehyoung; Ayres, Benjamin; Kreidenweis, Sonia M.; Malm, William C.; Collett, Jeffrey L.

2006-08-01T23:59:59.000Z

216

Method of dispersing particulate aerosol tracer  

DOE Patents (OSTI)

A particulate aerosol tracer which comprises a particulate carrier of sheet silicate composition having a particle size up to one micron, and a cationic dopant chemically absorbed in solid solution in the carrier. The carrier is preferably selected from the group consisting of natural mineral clays such as bentonite, and the dopant is selected from the group consisting of rare earth elements and transition elements. The tracers are dispersed by forming an aqueous salt solution with the dopant present as cations, dispersing the carriers in the solution, and then atomizing the solution under heat sufficient to superheat the solution droplets at a level sufficient to prevent reagglomeration of the carrier particles.

O'Holleran, Thomas P. (Belleville, MI)

1988-01-01T23:59:59.000Z

217

In Vitro Genotoxicity of Particulate and Semi-Volatile Organic...  

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

Particulate and Semi-Volatile Organic Compound Exhaust Materails from a Set of Gasoline and a Set of Diesel Engine Vehicles Operated at 30F In Vitro Genotoxicity of Particulate...

218

On field studies of suspended matter that forms in a ship canal under the effect of moving ships  

Science Journals Connector (OSTI)

The results of studies of particulate matter in a navigable channel are given. For the first time, field data on suspension concentration were collected immediately after the passage of ships with different dr...

V. A. Chechko; B. V. Chubarenko; V. Yu. Kurchenko

2011-05-01T23:59:59.000Z

219

Electrically heated particulate filter preparation methods and systems  

DOE Patents (OSTI)

A control system that controls regeneration of a particulate filter is provided. The system generally includes a fuel control module that controls injection of fuel into exhaust that passes through the particulate filter. A regeneration module controls current to the particulate filter to initiate regeneration after the fuel has been injected into the exhaust.

Gonze, Eugene V [Pinckney, MI

2012-01-31T23:59:59.000Z

220

D matter  

Science Journals Connector (OSTI)

We study the properties and phenomenology of particlelike states originating from D branes whose spatial dimensions are all compactified. They are nonperturbative states in string theory and we refer to them as D matter. In contrast to other nonperturbative objects such as ’t Hooft–Polyakov monopoles, D-matter states could have perturbative couplings among themselves and with ordinary matter. The lightest D particle (LDP) could be stable because it is the lightest state carrying certain (integer or discrete) quantum numbers. Depending on the string scale, they could be cold dark matter candidates with properties similar to that of WIMPs or wimpzillas. The spectrum of excited states of D matter exhibits an interesting pattern which could be distinguished from that of Kaluza-Klein modes, winding states, and string resonances. We speculate about possible signatures of D matter from ultrahigh energy cosmic rays and colliders.

Gary Shiu and Lian-Tao Wang

2004-06-29T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Generator powered electrically heated diesel particulate filter  

DOE Patents (OSTI)

A control circuit for a vehicle powertrain includes a switch that selectivity interrupts current flow between a first terminal and a second terminal. A first power source provides power to the first terminal and a second power source provides power to the second terminal and to a heater of a heated diesel particulate filter (DPF). The switch is opened during a DPF regeneration cycle to prevent the first power source from being loaded by the heater while the heater is energized.

Gonze, Eugene V; Paratore, Jr., Michael J

2014-03-18T23:59:59.000Z

222

Dark Matters  

ScienceCinema (OSTI)

One of the greatest mysteries in the cosmos is that it is mostly dark.  Astronomers and particle physicists today are seeking to unravel the nature of this mysterious, but pervasive dark matter which has profoundly influenced the formation of structure in the universe.  I will describe the complex interplay between galaxy formation and dark matter detectability and review recent attempts to measure particle dark matter by direct and indirect means.

Joseph Silk

2010-01-08T23:59:59.000Z

223

Measurement of particulate densities in air  

Science Journals Connector (OSTI)

Clean air is one of the most important issues that govern the health of all live forms. However presently there are not many quick and simple methods for measuring impurities like particulates in air. These impurities have an enormous diversity in their physical and chemical structure. They may be unburned carbon particles from a diesel engine exhaust and chimney pollen grains in the spring air or asbestos in a factory. This paper shows that changes in the composition of the air cause a change in the speed of sound. Therefore by measuring the change in the speed of sound it is possible to monitor the density of particulates in the air. Preliminary tests are conducted on various smoke–air mixtures. The results demonstrate that this methodology is very sensitive to any changes in the composition of the air. Its implementation is very simple and efficient and costs much less than the conventional method currently used in the auto industry. This technique will be used to calculate the mass density of the particulates resulting from a diesel engine and results thus obtained will be compared with those calculated using other methods.

2001-01-01T23:59:59.000Z

224

Dense, finely, grained composite materials  

DOE Patents (OSTI)

Dense, finely grained composite materials comprising one or more ceramic phase or phase and one or more metallic and/or intermetallic phase or phases are produced by combustion synthesis. Spherical ceramic grains are homogeneously dispersed within the matrix. Methods are provided, which include the step of applying mechanical pressure during or immediately after ignition, by which the microstructures in the resulting composites can be controllably selected.

Dunmead, Stephen D. (Davis, CA); Holt, Joseph B. (San Jose, CA); Kingman, Donald D. (Danville, CA); Munir, Zuhair A. (Davis, CA)

1990-01-01T23:59:59.000Z

225

Dark matter  

Science Journals Connector (OSTI)

...just how much dark matter in baryons...have lead to the discovery that a large component of the dark mass in groups...the highest-energy photons and the...to that of the discovery of the microwave...experiments assume the dark matter in the...c) Vacuum energy and the cosmological...

1999-01-01T23:59:59.000Z

226

A Standard Soot Generator for Diesel Particulate Filter Testing  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CAMBUSTION A Standard Soot Generator for Diesel Particulate Filter Testing Poster - P10 Diesel Engine Emission Reduction Conference 2007 Chris Nickolaus ...

227

Non-Destructive Neutron Imaging to Analyze Particulate Filters  

Energy.gov (U.S. Department of Energy (DOE))

Non-destructive, non-invasive imaging is being employed in the laboratory to understand how soot, ash, and catalytic washcoat are deposited within a diesel particulate filter.

228

Requirements-Driven Diesel Catalyzed Particulate Trap Design...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Driven Diesel Catalyzed Particulate Trap (DCPT) Design and Optimization Tom Harris, Donna McConnell and Danan Dou Delphi Catalyst Tulsa, Oklahoma 2 Euro 45 Light Duty...

229

Failure Stress and Apparent Elastic Modulus of Diesel Particulate...  

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

Elastic Modulus of Diesel Particulate Filter Ceramics Three established mechanical test specimen geometries and test methods for brittle materials are adapted to DPF...

230

The constitutive behaviour of strong cohesive particulate gels in compression  

E-Print Network (OSTI)

A simple and popular constitutive model used to describe the compressional strength of a consolidating strongly cohesive particulate gel is tested further with new experimental data.

A. A. Aziz; R. Buscall; R. de Kretzer; M. Kristjansson; P. J. Scales; A. D. Stickland; H-E Teo; S. P. Usher

2014-10-20T23:59:59.000Z

231

Partitioning of Volatile Organics in Diesel Particulate and Exhaust...  

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

and Exhaust Partitioning of Volatile Organics in Diesel Particulate and Exhaust Evaluation of how sampling details affect the measurement of volatile organic compounds in...

232

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...

233

Diesel Particulate Oxidation Model: Combined Effects of Fixed...  

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

Volatile Carbon Diesel Particulate Oxidation Model: Combined Effects of Fixed & Volatile Carbon Poster presented at the 16th Directions in Engine-Efficiency and Emissions Research...

234

Neutron Imaging of Diesel Particulate Filters  

SciTech Connect

This article presents nondestructive neutron computed tomography (nCT) measurements of Diesel Particulate Filters (DPFs) as a method to measure ash and soot loading in the filters. Uncatalyzed and unwashcoated 200cpsi cordierite DPFs exposed to 100% biodiesel (B100) exhaust and conventional ultra low sulfur 2007 certification diesel (ULSD) exhaust at one speed-load point (1500rpm, 2.6bar BMEP) are compared to a brand new (never exposed) filter. Precise structural information about the substrate as well as an attempt to quantify soot and ash loading in the channel of the DPF illustrates the potential strength of the neutron imaging technique.

Strzelec, Andrea [ORNL; Bilheux, Hassina Z [ORNL; FINNEY, Charles E A [ORNL; Daw, C Stuart [ORNL; Foster, Prof. Dave [University of Wisconsin; Rutland, Prof. Christopher J. [University of Wisconsin; Schillinger, Burkhard [FRM-II, Technische Universitaet Munchen; Schulz, Michael [FRM-II, Technische Universitaet Munchen

2009-01-01T23:59:59.000Z

235

Acute cardiovascular effects of exposure to air pollution: components, vascular mechanisms and protecting the public   

E-Print Network (OSTI)

Exposure to air pollution, particularly fine and ultrafine particulate matter derived from combustion sources, has been consistently associated with increased cardiovascular morbidity and mortality. Recent controlled exposure ...

Langrish, Jeremy Patrick

2012-11-30T23:59:59.000Z

236

Quark Matter  

NLE Websites -- All DOE Office Websites (Extended Search)

Quark Quark Matter in Neutron Stars Prashanth Jaikumar Argonne National Laboratory, (PHY) September 7th, 2006 . - p.1/29 Outline * Neutron stars: observations by a theorist . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) * Is quark matter inside neutron stars ruled out? . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) * Is quark matter inside neutron stars ruled out? ------------------------ * Strange Quark stars: Features and "Findings" . - p.2/29 Outline * Neutron stars: observations by a theorist * Mass-Radius constraints on Equation of State (EoS) * Is quark matter inside neutron stars ruled out? ------------------------

237

Gravitational lensing: a unique probe of dark matter and dark energy  

Science Journals Connector (OSTI)

...fine-scale distribution of dark matter will require exquisite...puzzle of resolving the dark matter question were...astronomers, consider the discovery from two studies of distant...gravitating matter (dark and visible), but actually...implies the presence of an energy density with a negative...

2010-01-01T23:59:59.000Z

238

Effects of oxygenated fuel blends on carbonaceous particulate composition and particle size distributions from a stationary diesel engine  

Science Journals Connector (OSTI)

Abstract A systematic study was conducted to evaluate and compare the effects of blending five different oxygenated compounds, diglyme (DGM), palm oil methyl ester (PME), dimethyl carbonate (DMC), diethyl adipate (DEA) and butanol (Bu) with ultralow sulfur diesel (ULSD), on engine performance, particulate mass concentrations, organic (OC) and elemental (EC) carbon fractions of the particles and particle size distributions from a single cylinder, direct injection stationary diesel engine with the engine working at a constant engine speed and at three engine loads. A small increase in the brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE) was observed with the use of oxygenates blended with ULSD. All five oxygenates were found to be effective at reducing particulate mass emissions at medium and high engine loads, with butanol being the most effective and DGM being the least effective. Analysis of the relative contribution of changes in the OC and EC emissions to the reduction of particulate matter indicated that under the same oxygen content, EC made a dominant contribution to the reduction of particulate mass. The results also indicated that reduction in both particle mass and number emissions was affected not only by the oxygen content, but also by the chemical structure and thermophysical properties of oxygenates as well as engine operating conditions.

Zhi-Hui Zhang; Rajasekhar Balasubramanian

2015-01-01T23:59:59.000Z

239

Modeling and interpreting the observed effects of ash on diesel particulate filter performance and regeneration  

E-Print Network (OSTI)

Diesel particulate filters (DPF) are devices that physically capture diesel particulates to prevent their release to the atmosphere. Diesel particulate filters have seen widespread use in on- and off-road applications as ...

Wang, Yujun, Ph. D. Massachusetts Institute of Technology

2014-01-01T23:59:59.000Z

240

Advanced Particulate Filter Technologies for Direct Injection Gasoline Engine Applications  

Energy.gov (U.S. Department of Energy (DOE))

Specific designs and material properties have to be developed for gasoline particulate filters based on the different engine and exhaust gas characteristic of gasoline engines compared to diesel engines, e.g., generally lower levels of engine-out particulate emissions or higher GDI exhaust gas temperatures

Note: This page contains sample records for the topic "fine particulate matter" 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

Process for off-gas particulate removal and apparatus therefor  

DOE Patents (OSTI)

In the event of a breach in the off-gas line of a melter operation requiring closure of the line, a secondary vessel vent line is provided with a particulate collector utilizing atomization for removal of large particulates from the off-gas. The collector receives the gas containing particulates and directs a portion of the gas through outer and inner annular channels. The collector further receives a fluid, such as water, which is directed through the outer channel together with a second portion of the particulate-laden gas. The outer and inner channels have respective ring-like termination apertures concentrically disposed adjacent one another on the outer edge of the downstream side of the particulate collector. Each of the outer and inner channels curves outwardly away from the collector's centerline in proceeding toward the downstream side of the collector. Gasflow in the outer channel maintains the fluid on the channel's wall in the form of a "wavy film," while the gas stream from the inner channel shears the fluid film as it exits the outer channel in reducing the fluid to small droplets. Droplets formed by the collector capture particulates in the gas stream by one of three mechanisms: impaction, interception or Brownian diffusion in removing the particulates. The particulate-laden droplets are removed from the fluid stream by a vessel vent condenser or mist eliminator.

Carl, Daniel E. (Orchard Park, NY)

1997-01-01T23:59:59.000Z

242

Process for off-gas particulate removal and apparatus therefor  

DOE Patents (OSTI)

In the event of a breach in the off-gas line of a melter operation requiring closure of the line, a secondary vessel vent line is provided with a particulate collector utilizing atomization for removal of large particulates from the off-gas. The collector receives the gas containing particulates and directs a portion of the gas through outer and inner annular channels. The collector further receives a fluid, such as water, which is directed through the outer channel together with a second portion of the particulate-laden gas. The outer and inner channels have respective ring-like termination apertures concentrically disposed adjacent one another on the outer edge of the downstream side of the particulate collector. Each of the outer and inner channels curves outwardly away from the collector`s centerline in proceeding toward the downstream side of the collector. Gas flow in the outer channel maintains the fluid on the channel`s wall in the form of a ``wavy film,`` while the gas stream from the inner channel shears the fluid film as it exits the outer channel in reducing the fluid to small droplets. Droplets formed by the collector capture particulates in the gas stream by one of three mechanisms: impaction, interception or Brownian diffusion in removing the particulates. The particulate-laden droplets are removed from the fluid stream by a vessel vent condenser or mist eliminator. 4 figs.

Carl, D.E.

1997-10-21T23:59:59.000Z

243

Liquefaction characteristics of a fine sand  

E-Print Network (OSTI)

LIQUEFACTION CHARACTERISTICS OF A FINE SAND A Thesis by DONALD TIMOTHY BRANDON Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1974 Major Subject...: Civil Engineering LIQUEFACTION CHARACTERISTICS OF A FINE SAND A Thesis by DONALD TIMOTHY BRANDON Approved as to style and content by: airman o Commi ee) ead of Depar ent) (Member) ( ber) ABSTRACT LIQUEFACTION CEARACTERISTICS OF A FINE SAND...

Brandon, Donald Timothy

2012-06-07T23:59:59.000Z

244

E-Print Network 3.0 - air particulate samples Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

search results for: air particulate samples Page: << < 1 2 3 4 5 > >> 1 Prevention of Air Pollution from Ships: Diesel Engine Particulate Emission Reduction via...

245

Impact of Transportation on Cost, Energy and Particulate Emissions for Recycled Concrete Aggregate.  

E-Print Network (OSTI)

??IMPACT OF TRANSPORTATION ON COST, ENERGY AND PARTICULATE EMISSIONS FOR RECYCLED CONCRETE AGGREGATE Transportation distances can have a huge impact on cost, energy, and particulate… (more)

Hameed, Mohamed

2009-01-01T23:59:59.000Z

246

Distribution of size-fractionated particulate trace metals collected by bottles and in-situ pumps in the Gulf of Maine–Scotian Shelf and Labrador Sea  

Science Journals Connector (OSTI)

The distribution of size-fractionated particulate trace metals (Al, Fe, Mn, Pb, Cu, V, and Co) was investigated in the Gulf of Maine–Scotian Shelf and Labrador Sea by collection of particulate matter using water bottles (Go-flo) and large volume in-situ pumps (Challenger Oceanic Systems and Services). Trace metal procedural filter blanks for Poretics membrane filters (0.4- and 10 ?m pore size) and Nitex screens (53 ?m mesh size) were sufficiently low that metal concentrations could be measured reliably. These results validate the use of Challenger Oceanics Systems and Services in-situ pumps for collection of particulate trace metals (Al, Fe, Mn, Pb, Cu, V, and Co) in shelf, slope, and open ocean Atlantic waters. In the Gulf of Maine–Scotian Shelf and Labrador Sea, trace metal concentrations per volume filtered generally decrease with increasing particle size for all metals. In the upper 250 m of slope waters of the Gulf of Maine–Scotian Shelf and in the Labrador Sea, trace metal concentrations in all particle sizes are lower than in shelf waters. Higher particulate metal concentrations in shelf waters are consistent with an increase in the supply of these trace metals with proximity to continental sources. In addition, an increase in particulate trace metal concentrations in shelf waters with depth is attributed to an input from resuspended sediment.

Sarah E. Weinstein; S.Bradley Moran

2004-01-01T23:59:59.000Z

247

Impacts of a Nanosized Ceria Additive on Diesel Engine Emissions of Particulate and Gaseous Pollutants  

E-Print Network (OSTI)

reductions of CO2, CO, total particulate mass, formaldehyde, acetaldehyde, acrolein, and several polycyclic

Garfunkel, Eric

248

Li2O Particulate Flow Concept, APPLE APEX Interim Report November, 1999  

E-Print Network (OSTI)

Li2O Particulate Flow Concept, APPLE APEX Interim Report November, 1999 9-1 CHAPTER 9: Li2O PARTICULATE FLOW CONCEPT ­ APPLE DESIGN Contributors Lead Author: Dai Kai Sze Dai Kai Sze, Zhanhe Wang (ANL Particulate Flow Concept, APPLE APEX Interim Report November, 1999 9-2 9. LI2O PARTICULATE FLOW CONCEPT

California at Los Angeles, University of

249

What is the Evidence for Dark Matter?  

E-Print Network (OSTI)

Newtonian mechanics indicates that galaxies and galaxy clusters are much more massive than we would have guessed from their luminosities, with the discrepancy being generally attributed to dark matter halos. An alternative hypothesis is that accelerations in very weak gravitational fields are larger than predicted by Newton's laws, and there is no need for dark matter. Even though we do not currently have a satisfactory theory associated with this rival hypothesis, we can ask whether any observational tests could rule it out or prefer it over the dark matter hypothesis. Current evidence suggests that neither hypothesis enjoys a decisive advantage over the other. If dark matter turns out to be the correct interpretation however, then theories of galaxy formation face some quite severe fine-tuning problems.

J A Sellwood

2004-01-20T23:59:59.000Z

250

Mesoscale Simulations of Particulate Flows with Parallel Distributed Lagrange Multiplier Technique  

SciTech Connect

Fluid particulate flows are common phenomena in nature and industry. Modeling of such flows at micro and macro levels as well establishing relationships between these approaches are needed to understand properties of the particulate matter. We propose a computational technique based on the direct numerical simulation of the particulate flows. The numerical method is based on the distributed Lagrange multiplier technique following the ideas of Glowinski et al. (1999). Each particle is explicitly resolved on an Eulerian grid as a separate domain, using solid volume fractions. The fluid equations are solved through the entire computational domain, however, Lagrange multiplier constrains are applied inside the particle domain such that the fluid within any volume associated with a solid particle moves as an incompressible rigid body. Mutual forces for the fluid-particle interactions are internal to the system. Particles interact with the fluid via fluid dynamic equations, resulting in implicit fluid-rigid-body coupling relations that produce realistic fluid flow around the particles (i.e., no-slip boundary conditions). The particle-particle interactions are implemented using explicit force-displacement interactions for frictional inelastic particles similar to the DEM method of Cundall et al. (1979) with some modifications using a volume of an overlapping region as an input to the contact forces. The method is flexible enough to handle arbitrary particle shapes and size distributions. A parallel implementation of the method is based on the SAMRAI (Structured Adaptive Mesh Refinement Application Infrastructure) library, which allows handling of large amounts of rigid particles and enables local grid refinement. Accuracy and convergence of the presented method has been tested against known solutions for a falling sphere as well as by examining fluid flows through stationary particle beds (periodic and cubic packing). To evaluate code performance and validate particle contact physics algorithm, we performed simulations of a representative experiment conducted at the University of California at Berkley for pebble flow through a narrow opening.

Kanarska, Y

2010-03-24T23:59:59.000Z

251

Automated particulate sampler field test model operations guide  

SciTech Connect

The Automated Particulate Sampler Field Test Model Operations Guide is a collection of documents which provides a complete picture of the Automated Particulate Sampler (APS) and the Field Test in which it was evaluated. The Pacific Northwest National Laboratory (PNNL) Automated Particulate Sampler was developed for the purpose of radionuclide particulate monitoring for use under the Comprehensive Test Ban Treaty (CTBT). Its design was directed by anticipated requirements of small size, low power consumption, low noise level, fully automatic operation, and most predominantly the sensitivity requirements of the Conference on Disarmament Working Paper 224 (CDWP224). This guide is intended to serve as both a reference document for the APS and to provide detailed instructions on how to operate the sampler. This document provides a complete description of the APS Field Test Model and all the activity related to its evaluation and progression.

Bowyer, S.M.; Miley, H.S.

1996-10-01T23:59:59.000Z

252

Diesel Particulate Filters and NO2 Emission Limits | Department...  

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

Filters and NO2 Emission Limits Diesel Particulate Filters and NO2 Emission Limits EPAs New air quality standards for NO2 will impact future DPF designs deer09ibrahim.pdf More...

253

Comparative study of the performance of conventional and column flotation when treating coking coal fines  

Science Journals Connector (OSTI)

Investigations were carried out on coking coal fines by conventional cell and column flotation techniques. The effects of different operating parameters were evaluated for both conventional and column flotation. The coal fines were collected from Bhojudih washery, India. These coal fines averaged 24.4% ash, 19.8% volatile matter and 53.8% fixed carbon on a dry basis. A commercial grade sodium silicate, light diesel oil and pine oil were used as depressant, collector and frother respectively. The flotation performance was compared with release analysis. The conventional flotation results indicated that a clean coal with 14.4% ash could be obtained at 78.0% yield with 88.4% combustible recovery. The ash of the clean coal could be further reduced to 10.1% at 72.0% yield with 85.6% combustible recovery by using column flotation. The column flotation results were close to those obtained by release analysis.

M.S. Jena; S.K. Biswal; S.P. Das; P.S.R. Reddy

2008-01-01T23:59:59.000Z

254

Zone heated inlet ignited diesel particulate filter regeneration  

SciTech Connect

An exhaust system that processes exhaust generated by an engine is provided. The system includes: a particulate filter (PF) that is disposed downstream of the engine and that filters particulates from the exhaust; and a grid that includes electrically resistive material that is segmented by non-conductive material into a plurality of zones and wherein the grid is applied to an exterior upstream surface of the PF.

Gonze, Eugene V [Pinckney, MI; Ament, Frank [Troy, MI

2012-06-26T23:59:59.000Z

255

PARTICULATE EMISSION ABATEMENT FOR KRAKOW BOILERHOUSES  

SciTech Connect

A U.S./Polish Bilateral Steering Committee (BSC) and the Department of Energy (DOE) selected LSR Technologies, Inc. as a contractor to participate in the Krakow Clean Fuels and Energy Efficiency Program. The objective of this program was the formation of business ventures between U.S. and Polish firms to provide equipment and services to reduce air emissions in the city of Krakow. A cooperative agreement was entered into by DOE and LSR to begin work in April 1994 involving implementation of particulate control technology called a Core Separator{trademark} for coal-fueled boilerhouses in the city. The major work tasks included: (1) conducting a market analysis, (2) completion of a formal marketing plan, (3) obtaining patent protection within Poland, (4) selecting a manufacturing partner, and (5) completing a demonstration unit and commercial installations. In addition to work performed by LSR Technologies, key contributors to this project were (1) the Polish Foundation for Energy Efficiency (FEWE), a non-profit consulting organization specializing in energy and environmental-related technologies, and (2) EcoInstal, a privately held Polish company serving the air pollution control market. As the project concluded in late 1998, five (5) Core Separator{trademark} installations had been implemented in the city of Krakow, while about 40 others were completed in other regions of Poland.

Bruce H. Easom; Leo A, Smolensky; S. Ronald Wysk; Jan Surowka; Miroslaw Litke; Jacek Ginter

1998-09-30T23:59:59.000Z

256

Single Wall Diesel Particulate Filter (DPF) Filtration Efficiency Studies Using Laboratory Generated Particles  

SciTech Connect

Diesel offers higher fuel efficiency, but produces higher exhaust particulate matter. Diesel particulate filters are presently the most efficient means to reduce these emissions. These filters typically trap particles in two basic modes: at the beginning of the exposure cycle the particles are captured in the filter holes, and at longer times the particles form a "cake" on which particles are trapped. Eventually the "cake" removed by oxidation and the cycle is repeated. We have investigated the properties and behavior of two commonly used filters: silicon carbide (SiC) and cordierite (DuraTrap® RC) by exposing them to nearly-spherical ammonium sulfate particles. We show that the transition from deep bed filtration to "cake" filtration can easily be identified by recording the change in pressure across the filters as a function of exposure. We investigated performance of these filters as a function of flow rate and particle size. The filters trap small and large particles more efficiently than particles that are ~80 to 200 nm in aerodynamic diameter. A comparison between the experimental data and a simulation using incompressible lattice-Boltzmann model shows very good qualitative agreement, but the model overpredicts the filter’s trapping efficiency.

Yang, Juan; Stewart, Marc; Maupin, Gary D.; Herling, Darrell R.; Zelenyuk, Alla

2009-04-15T23:59:59.000Z

257

Loading and Regeneration Analysis of a Diesel Particulate Filter with a Radio Frequency-Based Sensor  

SciTech Connect

Accurate knowledge of diesel particulate filter (DPF) loading is critical for robust and efficient operation of the combined engine-exhaust aftertreatment system. Furthermore, upcoming on-board diagnostics regulations require on-board technologies to evaluate the status of the DPF. This work describes the application of radio frequency (RF) based sensing techniques to accurately measure DPF soot levels and the spatial distribution of the accumulated material. A 1.9L GM turbo diesel engine and a DPF with an RF-sensor were studied. Direct comparisons between the RF measurement and conventional pressure-based methods were made. Further analysis of the particulate matter loading rates was obtained with a mass-based soot emission measurement instrument (TEOM). Comparison with pressure drop measurements show the RF technique is unaffected by exhaust flow variations and exhibits a high degree of sensitivity to DPF soot loading and good dynamic response. Additional computational and experimental work further illustrates the spatial resolution of the RF measurements. Based on the experimental results, the RF technique shows significant promise for improving DPF control enabling optimization of the combined engine-aftertreatment system for improved fuel economy and extended DPF service life.

Sappok, Alex [Filter Sensing Technologies] [Filter Sensing Technologies; Prikhodko, Vitaly Y [ORNL] [ORNL; Parks, II, James E [ORNL

2010-01-01T23:59:59.000Z

258

Immobilization of Rocky Flats Graphite Fines Residue  

SciTech Connect

The development of the immobilization process for graphite fines has proceeded through a series of experimental programs. The experimental procedures and results from each series of experiments are discussed in this report.

Rudisill, T.S.

1999-04-06T23:59:59.000Z

259

The biogeochemical fate of organic matter in the ocean is an important issue that must be  

E-Print Network (OSTI)

be considered in order to understand the role of the ocean in climate change. The biological pump involves to the ocean interior, resulting in the temporary or permanent storage of carbon1­3 . The known mechanisms involved in the biological pump include the sedimentation of particulate organic matter (POM) from surface

Hansell, Dennis

260

Temperature-driven decoupling of key phases of organic matter degradation in marine sediments  

E-Print Network (OSTI)

Temperature-driven decoupling of key phases of organic matter degradation in marine sediments for review August 29, 2005) The long-term burial of organic carbon in sediments results in the net and atmosphere. Sediment microbial activity plays a major role in determining whether particulate organic carbon

Weston, Nathaniel B.

Note: This page contains sample records for the topic "fine particulate matter" 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

Experimental investigation of the effect of combined hydrogen and diesel combustion on the particulate size distribution from a high speed direct injection diesel engine  

Science Journals Connector (OSTI)

The effects of hydrogen addition and exhaust gas recirculation (EGR) levels on the exhaust particulate matter size distribution in a diesel engine have been investigated. The experiments were performed on a 2.0 litre, 4-cylinder, direct injection engine equipped with a modern high-pressure common rail. A nano-Micro-Orifice Uniform Deposit Impactor (nano-MOUDI) was used in this work to study the particulate matter size distribution. All tests were conducted at the set operating point of 1,500 rpm. The experimental work showed that the particulate matter size distribution was not dramatically altered by the addition of EGR, but the main peak was shifted towards the nucleation mode with the addition of hydrogen. The addition of hydrogen increases the emissions of nitrogen oxides (NOx), but reduces the emissions of unburnt hydrocarbons (THC). Conversely, the addition of EGR reduces NOx, but can increase THC. Hydrogen addition increases the peak cylinder pressure and the maximum rate of pressure rise.

L. McWilliam; A. Megaritis

2009-01-01T23:59:59.000Z

262

Lanthanides as particulate flow markers in ruminants  

E-Print Network (OSTI)

!er (Langlands e+ al. , 1963; Thompson and Lamming, 1378; Uiyatt and I', acqae, 1974). Som" investigators have concluded that distritoution oi chromic oxide approximated that of t:hc dry matter (Corbett ei al. , 1958; Corbet t et al. , 1959) while others sugg... indicate ei ther adsorption or associ ated flow. For example, chromic oxide would cosediment with digosta solids, solely due to its insolu- b-ility, without being physicaily associated with the feed residues in any mann r. Advancements in analytical...

Conner, Michael Cronan

1977-01-01T23:59:59.000Z

263

Higher modulus compositions incorporating particulate rubber  

DOE Patents (OSTI)

Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles. 2 figs.

Bauman, B.D.; Williams, M.A.; Bagheri, R.

1997-12-02T23:59:59.000Z

264

Higher modulus compositions incorporating particulate rubber  

DOE Patents (OSTI)

Rubber particles, to be used as fillers or extenders for various composite polymer systems, are chlorinated by a gas-solid phase reaction with a chlorine-containing gas. A composite polymer containing the chlorinated rubber fillers or extenders exhibits a higher flexural modulus than if prepared using an unchlorinated rubber filler or extender. Chlorination of the rubber particles is carried out by contacting the finely divided rubber particles with a chlorine-containing gas comprising at least about 5 volume percent chlorine. Advantageously, the chlorine can be diluted with air, nitrogen or other essentially inert gases and may contain minor amounts of fluorine. Improved performance is obtained with nitrogen dilution of the chlorine gas over air dilution. Improved polymer composite systems having higher flexural modulus result from the use of the chlorinated rubber particles as fillers instead of unchlorinated rubber particles.

Bauman, Bernard D. (Emmaus, PA); Williams, Mark A. (Souderton, PA); Bagheri, Reza (Bethlehem, PA)

1997-12-02T23:59:59.000Z

265

Variable power distribution for zoned regeneration of an electrically heated particulate filter  

DOE Patents (OSTI)

A system includes a particulate matter (PM) filter with multiple zones, an electric heater and a control module. The electrical heater includes heater segments, which each correspond with a respective one of the zones. The electrical heater is arranged upstream from and is proximate with the PM filter. The control module selectively applies a first energy level to a first one of the zones via a first one of the heater segments to initiate regeneration in the first zone. The control module also selectively applies a second energy level that is less than the first energy level to a second one of the zones via a second one of the heater segments to initiate regeneration in the second zone.

Bhatia, Garima [Bangalore, IN; Gonze, Eugene V [Pinckney, MI

2012-04-03T23:59:59.000Z

266

Continuous particulate monitoring for emission control  

SciTech Connect

An optical continuous particle monitoring system has been developed to overcome common problems associated with emissions monitoring equipment. Opacity monitors generally use a single- or double-pass system to analyze the presence of dust particles in the flue gas stream. The particles scatter and absorb light as it passes through the stack. As the particle content in the gas stream increases due to bag failure or some other problem, the amount of light that is blocked also increases. The opacity monitor compares the amount of lost light energy to the total energy of the light available and translates the signal to percentage of opacity. Opacity monitors are typically installed to meet the requirements set forth by pollution control agencies. Most opacity monitors are designed to meet all of the requirements of the Environmental Protection Agency (EPA) 40 CFR, Part 60, Appendix B, Performance Specification. The new continuous particle monitor (CPM) increases the accuracy of emission monitoring and overcomes typical problems found in conventional emission monitoring devices. The CPM is an optically based, calibratible, continuous dust monitor that uses a microprocessor, transmitter head, and receiver head. When calibrated with an isokinetic sample, a continuous readout of particulate concentration (in mg/m[sup 3]) in the exhaust gas is provided. The system can be used as a filter bag failure system or a long-term emission trend analyzer. Formal testing was conducted to evaluate the effectiveness of the optically based CPM. The monitor was calibrated using particles of a range of compositions, size distributions, and concentrations. The feasibility of using the instrument to measure particle concentration as low as 10 mg/m[sup 3] was examined.

Bock, A.H. (BHA Group, Inc., Kansas City, MO (United States))

1993-08-01T23:59:59.000Z

267

Particulate control for low rank coals  

SciTech Connect

The power generating system in Victoria currently comprises a total capacity of 6650 MW. Eighty percent of this capacity consists of base load stations in the Latrobe Valley using brown coal. The Latrobe Valley brown coals have unique characteristics with high moisture content ranging from 58 percent to 70 percent and an ash content which is relatively low but very variable in nature. These and other factors associated with the coal have caused special problems in handling and combustion of the coal and the de-dusting of the boiler flue gases. In recent years, this has been the basis for the design parameters adopted for all the plants in the system. With respect to flue gas de-dusting, the SECV has carried out extensive laboratory studies to characterize the different ashes obtained from the Latrobe Valley brown coals, including precipitability and aerodynamic tests. It also carried out full-scale tests on operating plants and pilot tests have been conducted on inertial collectors, precipitators and bag filters. The Environmental Protection Authority of Victoria has established a particulate emission level of 0.150 grams/m{sup 3} n.t.p. dry for recent Latrobe Valley boilers. However, the mandated emission level takes into account wide variations in operating conditions, and the plants normally achieve much lower emission levels. The Latrobe Valley plants presently in operation include Yallourn W (2x350 MW + 2x375 MW), Morwell (170 MW total and briquette factory), Hazelwood (8x200 MW) and Loy Yang (4x500 MW). The Yalloum W boilers are supplied with coal from the Yalloum Open Cut, the Morwell and Hazelwood boilers from the Morwell Open Cut and Loy Yang boilers from the Loy Yang Open Cut. All boilers are pulverized coal fired (PCF) and incorporate special firing equipment to enable the as-mined wet coal to be fired directly into the furnaces. All boilers are fitted with electrostatic precipitators. The locations of the stations and open cuts are shown.

Touzel, R.McD.

1993-12-31T23:59:59.000Z

268

Non-thermal Aftertreatment of Particulates  

SciTech Connect

Modern diesel passenger vehicles employing common rail, high speed direct injection engines are capable of matching the drivability of gasoline powered vehicles with the additional benefit of providing high torque at low engine speed [1]. The diesel engine also offers considerable fuel economy and CO2 emissions advantages. However, future emissions standards [2,3] present a significant challenge for the diesel engine, as its lean exhaust precludes the use of aftertreatment strategies employing 3- way catalytic converters, which operate under stoichiometric conditions. In recent years significant developments by diesel engine manufacturers have greatly reduced emissions of both particulates (PM) and oxides of nitrogen (NOx) [4,5]. However to achieve compliance with future legislative limits it has been suggested that an integrated approach involving a combination of engine modifications and aftertreatment technology [1] will be required. A relatively new approach to exhaust aftertreatment is the application of non-thermal plasma (NTP) or plasma catalyst hybrid systems. These have the potential for treatment of both NOx and PM emissions [6- 8]. The primary focus of recent plasma aftertreatment studies [9-12] has concentrated on the removal of NOx. It has been shown that by combining plasmas with catalysts it is possible to chemically reduce NOx. The most common approach is to use a 2- stage system relying upon the plasma oxidation of hydrocarbons to promote NO to NO2 conversion as a precursor to NO2 reduction over a catalyst. However, relatively little work has yet been published on the oxidation of PM by plasma [ 8,13]. Previous investigations [8] have reported that a suitably designed NTP reactor containing a packing material designed to filter and retain PM can effect the oxidation of PM in diesel exhausts at low temperatures. It has been suggested that the retained PM competes with hydrocarbons for O, and possibly OH, radicals. This is an important consideration in plasma - catalyst hybrid schemes for the removal of NOx employing an NO2 selective catalyst, as the oxidation of PM may deplete the key radicals necessary for NO to NO2 conversion. It was also suggested that where simultaneous NOx and PM removal are required, alternative catalyst formulations may be needed which may be selective to NO rather than NO2.

Thomas, S.E.

2000-08-20T23:59:59.000Z

269

Effect of soil freezing on particulate resuspension  

SciTech Connect

This report presents the results of small scale laboratory tests that were conducted to determine the effect of soil freezing on soil resuspension. Nontransuranic contaminated soil form the Radioactive Waste Management Complex was subjected to a series of test conditions to determine respirable and nonrespirable fractions of airborne dust. A separate fraction of the same soil was spiked with Pu-239 and subjected to the same test conditions. Concentrations of resuspended soil and Pu in air were determined. Test results show that: (a) the largest fraction of soil resuspended is in the nonrespirable size fraction, (b) the concentration of resuspended soil in air is highly dependent on surface air velocity, and (c) freezing is not as effective at reducing resuspension of fine dry soil as it is with coarse soil, and (d) artificially prepared Pu contaminated soil has a high proportion of the total activity distributed on ultrafine material, reacts inversely to the mass movement of soil, and does not adequately imitate Pu movement in an actual contaminated soil. 26 figs., 3 tabs.

Duce, S.W.; Shaw, P.G.; Winberg, M.R.

1988-08-01T23:59:59.000Z

270

Apparatus and method for void/particulate detection  

DOE Patents (OSTI)

Apparatus and method for detecting voids and particulates in a fluid within a containing vessel. A diffuse ultrasonic signal is coupled into the fluid by a first transducer and the portion of the ultrasonic signal transmitted through the fluid is detected by a second transducer. The received signal is analyzed by a processor to determine the void fraction of the fluid responsive to the attenuation of the received ultrasonic signal. In addition, voids and particulates are detected by evaluating the increase in side-band energy of the received signal.

Claytor, Thomas N. (Woodridge, IL); Ockert, Carl E. (Vienna, VA); Randall, Richard (Canoga Park, CA)

1987-01-01T23:59:59.000Z

271

A particulate non-specific alkaline phosphatase in Saccharomyces cerevisiae  

E-Print Network (OSTI)

. Dennis J. Opheim A previously undefined alkaline phosphatase in yeast, which is particulate, has been found. This latter form has no mobil- ity on polyacrylamide gels and can be sedimented after centri- fugation at 200, 000 x g for one hour. Over 90X... of the enzyme activity can be solubilized from the particulate fraction with 100 mM sodium cholate. In the solubilized state this enzyme has been found to migrate in the same position on polyacrylamide gels as the already known soluble repressible alkaline...

Mitchell, James Kent

1980-01-01T23:59:59.000Z

272

Numerous studies have shown that airborne particulate matter (PM) is associated with  

E-Print Network (OSTI)

such as ozone (O3) [Health Effects Institute 2002; National Research Council (NRC) 2004]. Studies have

Dominici, Francesca

273

Back-calculating emission rates for ammonia and particulate matter from area sources using dispersion modeling  

E-Print Network (OSTI)

Engineering directly impacts current and future regulatory policy decisions. The foundation of air pollution control and air pollution dispersion modeling lies in the math, chemistry, and physics of the environment. Therefore, regulatory decision...

Price, Jacqueline Elaine

2004-11-15T23:59:59.000Z

274

Air dispersion modeling of particulate matter from ground-level area sources  

E-Print Network (OSTI)

permit when, in fact, its emissions result in off-property concentrations that would not cause a violation of the National Ambient Air Quality Standard (NAAQS) for PM. To ensure fair and reliable regulation of pollutant sources, dispersion models...

Meister, Michael Todd

2012-06-07T23:59:59.000Z

275

Evaluation of a Partial Flow Dilution System for Transient Particulate Matter Emissions  

Energy.gov (U.S. Department of Energy (DOE))

A commercially available partial flow dilution system was evaluated against a constant volume sampling system over a suite of transient engine dynamometer tests.

276

Why the Brazil nuts are on top: Size segregation of particulate matter by shaking  

Science Journals Connector (OSTI)

When a can containing one large ball and a number of smaller ones is shaken, the large ball rises to the top, even when the larger ball is more dense than the others. Similarly, a mixture of different sized particles will segregate by size when shaken. An adaptation of the Monte Carlo method is used to study this size segregation. The results show the local, geometric mechanism by which the segregation is produced. Segregation by size is to be distinguished from the more obvious sifting process which occurs when tiny grains filter down through the interstices between large particles.

Anthony Rosato; Katherine J. Strandburg; Friedrich Prinz; Robert H. Swendsen

1987-03-09T23:59:59.000Z

277

High-Energy Laser Diagnostics (HELD) for the Measurement of Diesel Particulate Matter  

Energy.gov (U.S. Department of Energy (DOE))

2004 Diesel Engine Emissions Reduction (DEER) Conference Presentation: Sandia National Laboratories, Combustion Research Facility

278

Investigation of Roadside Particulate Matter Concentration Surrounding Major Arterials in Five Southern Californian Cities  

E-Print Network (OSTI)

Figure 1. Mean wind speed and vertical velocity fluctuationsmean wind speed was 1.7 m/sec. However, vertical velocity

Pan, Hansheng; Bartolome, Christian; Princevac, Marko; Edwards, Rufus; Boarnet, Marlon

2010-01-01T23:59:59.000Z

279

Particulate matter (PM) is a major family of atmospheric pollutants (National Center for  

E-Print Network (OSTI)

-related pollutants on intrauterine growth restriction relied on birth weight certificates for the collection of birth pregnancy with offspring birth weight (reviewed by Glinianaia et al. 2004; Srám et al. 2005). Few studies. 2004; Parker et al. 2005). Four of these studies reported a decrease in term birth weight in relation

Paris-Sud XI, Université de

280

Timing and Scope of Emission Reductions for Airborn Particulate Matter: A Simplified Model  

E-Print Network (OSTI)

regulation. The push is toward legislative reforms favoring greater reliance on economic analysis in policy

Washington at Seattle, University of

Note: This page contains sample records for the topic "fine particulate matter" 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

Abatement of Air Pollution: Control of Particulate Matter and Visible Emissions (Connecticut)  

Energy.gov (U.S. Department of Energy (DOE))

These regulations set emissions opacity standards for stationary sources with opacity continuous emissions monitoring equipment, stationary sources without such equipment, and mobile sources. The...

282

Exposure assessment of particulate matter air pollution before, during, and after the 2003 Southern California wildfires  

E-Print Network (OSTI)

1999. Health Impacts of Biomass Air Pollution. In: Healthpublic health impacts of PM air pollution fro m wildfiresAir pollution and emergency room visits for asthma in Santa Clara County, California. Environmental Health

Wu, J; Winer, A M; Delfino, R J

2006-01-01T23:59:59.000Z

283

Particulate matter and atherosclerosis: role of particle size, composition and oxidative stress  

E-Print Network (OSTI)

the APHEA2 (Air Pollution and Health: A European Approach)Series Studies of Air Pollution and Health. Boston, MA:association of air pollution with adverse health effects [1-

Araujo, Jesus A; Nel, Andre E

2009-01-01T23:59:59.000Z

284

Vehicle Technologies Office Merit Review 2014: Fuel-Neutral Studies of Particulate Matter Transport Emissions  

Energy.gov (U.S. Department of Energy (DOE))

Presentation given by Pacific Northwest National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about fuel...

285

Role of Acidity in Mobilizing Colloidal Particulate Matter From Natural Sand Grain Surface  

E-Print Network (OSTI)

of acidity. This study looked at the role of acidity with H? as a chemical agent. Through cyclic elution of a natural sand column with a weak acid and base solution, there was an increase in mobilized clay colloids. It was found that low concentrations...

Hammons, Jessica Lynn

2012-02-14T23:59:59.000Z

286

Magnetic properties and Mössbauer spectra of urban atmospheric particulate matter: a case study from Munich, Germany  

Science Journals Connector (OSTI)

......particular it has been found that diesel- and petrol engines produce high proportions of nanoparticles...o.,1997. Rock Magnetism; Fundamentals and Frontiers, Cambridge University...radical generation in lung by diesel exhaust particles, Free Rad......

A. R. Muxworthy; E. Schmidbauer; N. Petersen

2002-08-01T23:59:59.000Z

287

On-Board Engine Exhaust Particulate Matter Sensor for HCCI and Conventional Diesel Engines  

Energy.gov (U.S. Department of Energy (DOE))

2009 DOE Hydrogen Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C.

288

Variation in the Sensitivity of Predicted Levels of Atmospheric Organic Particulate Matter (OPM)  

Science Journals Connector (OSTI)

Department of Civil and Environmental Engineering, and Department of Chemistry, Portland State University, Portland, Oregon 97207 and Bonneville Power Administration, 905 NE 11th Avenue Portland, Oregon 97232 ... Bonneville Power Administration. ... This work was supported by National Science Foundation Grant ATM-0513492, the Electric Power Research Institute, the Cooley Family Fund for Critical Research of the Oregon Community Foundation, and through the support of Steven T. Huff. ...

James F. Pankow; Elsa I. Chang

2008-09-04T23:59:59.000Z

289

Research papers Time-series measurements of settling particulate matter in Alfonso Basin,  

E-Print Network (OSTI)

Palo de Santa Rita, La Paz, BCS, Mexico b GEOTOP and Department of Earth and Planetary Sciences, Mc del Golfo de California" by the government of Mexico in 1978, was recognized as a UNESCO World. Despite the importance of the ecotourism industry it attracts, very limited monitoring

290

On-Board Engine Exhaust Particulate Matter Sensor for HCCI and Conventional Diesel Engines  

Energy.gov (U.S. Department of Energy (DOE))

Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on February 25, 2008 in Bethesda, Maryland.

291

Active DPF for Off-Road Particulate Matter (PM) Control | Department...  

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

Power Unit A Low-Cost Continuous Emissions Monitoring System for Mobile and Stationary Engine SCRDPF ApplicationsData-Logger for Vehicle Data Acquisition Power Generating...

292

Method Development: Identification of the Soluble Organic Fraction of Particulate Matter on DPF Soot  

Energy.gov (U.S. Department of Energy (DOE))

Poster presentation at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 August, 2007, Detroit, Michigan. Sponsored by the U.S. Department of Energy's (DOE) Office of FreedomCAR and Vehicle Technologies (OFCVT).

293

Heavy Duty Diesel Particulate Matter and Fuel Consumption Modeling for Transportation Analysis  

E-Print Network (OSTI)

of steady state engine fuel consumption and emission maps.affecting engine load and consequently fuel consumption. Theand engine speed which it then relates to fuel consumption

Scora, George Alexander

2011-01-01T23:59:59.000Z

294

DDT RESIDUES IN SEAWATER AND PARTICULATE MATTER IN THE CALIFORNIA CURRENT SYSTEM  

E-Print Network (OSTI)

GFC-glass-fiber filters, ranged from 1.2 to 5.7 X 10-6 gig carbon (with one exception). These values of particle-bearing water into a continuous-flow, internal recycle and recovery, liquid-liquid extracter

295

New Chemical Aerosol Characterization Methods- Examples Using Agricultural and Urban Airborne Particulate Matter  

E-Print Network (OSTI)

quality (Sweeten et al., 1998). However, accurate data for a number of regulated pollutants is lacking, and more measurements of agricultural aerosols are needed. A better understanding of the chemical composition of PM is also necessary for a complete...

Zhou, Lijun

2010-10-12T23:59:59.000Z

296

Evaluation of the TEOM method for the measurement of particulate matter for Texas cattle feedlots  

E-Print Network (OSTI)

The Tapered Element Oscillating Microbalance (TEOM) sampler is an EPA approved Federal Equivalent Method Sampler for measuring PM10 concentrations. The Center for Agricultural Air Quality Engineering and Science (CAAQES) owns two Rupprecht...

Skloss, Stewart James

2009-05-15T23:59:59.000Z

297

Engineering approaches to address erros in measured and predicted particulate matter concentrations  

E-Print Network (OSTI)

to a nominal 10 and 2.5 micrometers (PM10 and PM2.5) respectively. The current Federal Reference Method PM10 and PM2.5 samplers exhibit oversampling errors when sampling dusts with particle size distributions similar to those of agricultural sources...

Wanjura, John David

2006-08-16T23:59:59.000Z

298

Seasonal and Spatial Relationship of Chemistry and Toxicity in Atmospheric Particulate Matter Using Aquatic Bioassays  

Science Journals Connector (OSTI)

One final site, located at Seney National Wildlife Refuge in Michigan's Upper Peninsula, served as a remote site with limited local anthropogenic sources. ... The wind speeds during the first day of this event gusted up to nearly 50 mph, resulting in TSP mass loadings ranging from 30 to 50 ?g/m3 (the October sampling event is reported as a 3 day composite). ...

Rebecca J. Sheesley; James J. Schauer; Jocelyn D. Hemming; Steve Geis; Miel A. Barman

2005-01-13T23:59:59.000Z

299

Method and apparatus for acoustically monitoring the flow of suspended solid particulate matter  

DOE Patents (OSTI)

A method and apparatus for monitoring char flow in a coal gasifier system cludes flow monitor circuits which measure acoustic attenuation caused by the presence of char in a char line and provide a char flow/no flow indication and an indication of relative char density. The flow monitor circuits compute the ratio of signals in two frequency bands, a first frequency band representative of background noise, and a second higher frequency band in which background noise is attenuated by the presence of char. Since the second frequency band contains higher frequencies, the ratio can be used to provide a flow/no flow indication. The second band can also be selected so that attenuation is monotonically related to particle concentration, providing a quantitative measure of char concentration.

Roach, Paul D. (Darien, IL); Raptis, Apostolos C. (Downers Grove, IL)

1982-01-01T23:59:59.000Z

300

Correlation of meteorological variables with total suspended particulate matter in Harris County, Texas  

E-Print Network (OSTI)

in Harris County, Texas (August 1983) G. Anderson White, III, B. S. , The University of North Carolina at Chapel Hill; Chairman of Advisory Committee: Dr. K. C. Brundidge A statistical air pollution prediction model was developed for Harris County..., Texas. Routine and readily available meteorological data from Houston Intercontinental Airport, Lake Charles, Louisiana, and Victoria, Texas provided sufficient information to describe Harris County air pollution. Pollution was expressed as total...

White, G. Anderson

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

The atmospheric chemistry of trace gases and particulate matter emitted by different land uses in Borneo  

Science Journals Connector (OSTI)

...is hilly, having peaks above 500 m a.s...The ground-based oil palm plantation measurements...ToF-MS). The m/z 82 peak is greater over regions of oil palm, which is consistent...nearby Sabahmas oil palm plantation. Peaks are assigned, as...

2011-01-01T23:59:59.000Z

302

Airborne Particulate Matter in HVAC Systems and its Influence on Indoor Air Quality  

E-Print Network (OSTI)

This paper first reviews the mechanisms governing movement of PMs in HVAC systems. Then, the basic equations governing PM deposition in ducts are introduced and investigations on airborne PMs distribution in HVAC systems are reviewed. The influence...

Fu, Z.; Li, N.; Wang, H.

2006-01-01T23:59:59.000Z

303

Reduction of Transient Particulate Matter Spikes with Decision Tree Based Control  

Energy.gov (U.S. Department of Energy (DOE))

Using a non-parametric decision tree to measure transient PM could correctly identify 94% of high opacity spikes and used to take targeted action to reduce PM without affecting NOx.

304

The Effects of Human Activities on Exposure to Particulate Matter and Bioaerosols in Residential Homes  

Science Journals Connector (OSTI)

The between-home GSD of activity strengths was calculated by averaging log-transformed measurements for all sampling periods for each home, and computing the antilog of the standard deviation (SD) of the average for the 10 homes. ... The within-home GSD of activity strengths was calculated by taking the SD for log-transformed measurements for all sampling periods for each home and computing the antilog of the average SD for the 10 homes. ... with levels of airborne endotoxins in 111 Boston, Massachusetts, homes in a cohort study of home exposure and childhood asthma were assessed, and a predictive model to est. ...

Qing Chen; Lynn M. Hildemann

2009-04-06T23:59:59.000Z

305

Development of a size-fractionating stack sampler for collection of particulate matter  

E-Print Network (OSTI)

in the development program. Although attaining the des1red respirable value of 2 5 um for the sampler's cutpoint (aerodynamic diameter for which the collection efficienty is 50 percent) was not very difficult, reducing the wall losses to an acceptable level... in the dichotomous sampler. The final sampler train, which was operated at a flow rate of 16. 6 L/min, consisted of an 8 um cutpoint high capacity preseparator iv upstream of the 2. 5 um cutpoint dichotomous stack sampler. The particle collection filters...

Bertch, Russell William

2012-06-07T23:59:59.000Z

306

Heavy Duty Diesel Particulate Matter and Fuel Consumption Modeling for Transportation Analysis  

E-Print Network (OSTI)

27% of the total US energy consumption and 72% of theof Figures Figure 2-1 U.S. energy consumption by source andU.S. (FHWA, Figure 2-1 U.S. energy consumption by source and

Scora, George Alexander

2011-01-01T23:59:59.000Z

307

The atmospheric chemistry of trace gases and particulate matter emitted by different land uses in Borneo  

Science Journals Connector (OSTI)

...photochemistry and land-system change using measurements...Coupling in the Earth System (OP3/ACES) campaign...guineensis Elaeis oleifera hybrids of the progeny...East Asian land-system change on atmospheric...and land cover: solar radiation is efficiently...based on the vertical wind. There is no consensus...

2011-01-01T23:59:59.000Z

308

Temporal and spatial variation of particulate matter and chlorophyll in the Arabian Sea  

E-Print Network (OSTI)

of approximately 6. 2 * 106 kmz (Burkhill et al. , 1993). Although this makes the Arabian Sea one of the smallest ocean basins in the world, it exhibits tremendous spatial and temporal heterogeneity. The basin contains regions characterized as oligotrophic... by Jerlov (1976) as c=a+b where c, a and b are the attenuation, absorption and scattering coefficients, respectively. The light transmission values (Tr) are dependent upon the pathlength (r) and the attenuation coefficient (c) giving; Tf ? e-cr For a...

Gundersen, Jan Scott

2012-06-07T23:59:59.000Z

309

Emission of inorganic particulate matter during the combustion of biomass, biochar and Collie coal.  

E-Print Network (OSTI)

??Coal is an important part of Australia's energy mix and is expected to continue to play an essential role in supplying cheap and secure energy… (more)

Gao, Xiangpeng

2011-01-01T23:59:59.000Z

310

Modelling agricultural ammonia emissions: impact on particulate matter Hamaoui-Laguel L.1  

E-Print Network (OSTI)

: air/soil temperature, air/soil humidity, wind speed and rainfall are provided to Volt'Air by the outputs of the meteorological mesoscale model WRF (Weather Research and Forecasting; http://www.wrf- model://www.orleans.inra.fr/les_unites/us_infosol) are available at local scale and have been interpolated on the chosen grid scale (0.15° X 0.10°). Data about

Paris-Sud XI, Université de

311

The Role of Particulate Matter in the Development of Hypoxia on the Texas-Louisiana Shelf  

E-Print Network (OSTI)

and Gardner, 2004; Chen et al., 2004; Nelson and Siegel, 2002; Coble, 2007; D?Sa and DiMarco, 2009; Shank and Evans, 2011). CDOM is subject to photo-oxidation, so CDOM is not a completely conservative property of sea water (Coble, 2007; Shank and Evans.... Therefore, the CDOM present was a product of in situ respiration, not from the plume waters, since CDOM is dissolved. CDOM can only be transferred downward by mixing, not settling. D?Sa and DiMarco (2009) also observed concentrations of CDOM that were...

Cochran, Emma Mary

2013-07-31T23:59:59.000Z

312

E-Print Network 3.0 - acidic particulate matter Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

acetic acid, 100% solution... or bottom of the tube). 5) Add 0.5 ml cold acetone, vortex briefly. (This is to remove the acid.) 6) Spin 15 Source: Doering, Tamara - Department...

313

Imaging of Diesel Particulate Filters using a High-Flux Neutron...  

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

Imaging of Diesel Particulate Filters using a High-Flux Neutron Source Imaging of Diesel Particulate Filters using a High-Flux Neutron Source Detailed images of deposits identified...

314

Development of a Sub-Grid Model of a Diesel Particulate Filter...  

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

Sub-Grid Model of a Diesel Particulate Filter: application of the lattice-Boltzmann technique Development of a Sub-Grid Model of a Diesel Particulate Filter: application of the...

315

Macrophage-Mediated Endothelial Inflammatory Responses to Airborne Particulates: Impact of  

E-Print Network (OSTI)

-Fe/F-Al-Si). We have used these particulates, as well as coal fly ash (CFA) and diesel exhaust particulates (DEP remain unresolved. Using a microporous aluminosilicate zeolite Y as a manifold, we have synthesized 1 µm

Dutta, Prabir K.

316

Testing an Active Diesel Particulate Filter on a 2-Cycle Marine...  

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

Testing an Active Diesel Particulate Filter on a 2-Cycle Marine Engine Testing an Active Diesel Particulate Filter on a 2-Cycle Marine Engine Presentation given at DEER 2006,...

317

Moisture Matters | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

Moisture Matters Moisture Matters Cryogenic microscopy methods yield insights to microbial morphology State-of-the-art cryogenic electron microscopy (EM) approaches at EMSL are...

318

Dark Matter Theory  

NLE Websites -- All DOE Office Websites (Extended Search)

Dark Matter Theory Dark Matter Theory Understanding discoveries at the Energy, Intensity, and Cosmic Frontiers Get Expertise Rajan Gupta (505) 667-7664 Email Bruce Carlsten (505)...

319

System for utilizing oil shale fines  

DOE Patents (OSTI)

A system is provided for utilizing fines of carbonaceous materials such as particles or pieces of oil shale of about one-half inch or less diameter which are rejected for use in some conventional or prior surface retorting process, which obtains maximum utilization of the energy content of the fines and which produces a waste which is relatively inert and of a size to facilitate disposal. The system includes a cyclone retort (20) which pyrolyzes the fines in the presence of heated gaseous combustion products, the cyclone retort having a first outlet (30) through which vapors can exit that can be cooled to provide oil, and having a second outlet (32) through which spent shale fines are removed. A burner (36) connected to the spent shale outlet of the cyclone retort, burns the spent shale with air, to provide hot combustion products (24) that are carried back to the cyclone retort to supply gaseous combustion products utilized therein. The burner heats the spent shale to a temperature which forms a molten slag, and the molten slag is removed from the burner into a quencher (48) that suddenly cools the molten slag to form granules that are relatively inert and of a size that is convenient to handle for disposal in the ground or in industrial processes.

Harak, Arnold E. (Laramie, WY)

1982-01-01T23:59:59.000Z

320

Arthur Fine Bohrs Response to EPR: Criticism  

E-Print Network (OSTI)

Arthur Fine Bohrs Response to EPR: Criticism and Defense If a specific question has meaning of focus that Niels Bohr makes in responding to EPR.1 EPR appeal to measurement as sometimes sufficient ("elements of reality"). In his response, Bohr, while paraphrasing thewordsofEPR

Fine, Arthur

Note: This page contains sample records for the topic "fine particulate matter" 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

700:20131001.1211 Fine Sun Sensor  

E-Print Network (OSTI)

700:20131001.1211 Fine Sun Sensor The Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado, Boulder is a world leader in space-based research including measurements of the Sun with respect to sun center. LASP has built sun position sensors for decades beginning with sensors for sub

Mojzsis, Stephen J.

322

Characterization of Particulate Emissions from GDI Engine Combustion with Alcohol-blended Fuels  

Energy.gov (U.S. Department of Energy (DOE))

Analysis showed that gasoline direct injection engine particulates from alcohol-blended fuels are significantly different in morphology and nanostructures

323

Characterization of Pre-Commercial Gasoline Engine Particulates Through Advanced Aerosol Methods  

Energy.gov (U.S. Department of Energy (DOE))

Advanced aerosol analysis methods were used to examine particulates from single cylinder test engines running on gasoline and ethanol blends.

324

Crystal Structure and Characterization of Particulate Methane Monooxygenase from Methylocystis species Strain M  

SciTech Connect

Particulate methane monooxygenase (pMMO) is an integral membrane metalloenzyme that oxidizes methane to methanol in methanotrophic bacteria. Previous biochemical and structural studies of pMMO have focused on preparations from Methylococcus capsulatus (Bath) and Methylosinus trichosporium OB3b. A pMMO from a third organism, Methylocystis species strain M, has been isolated and characterized. Both membrane-bound and solubilized Methylocystis sp. strain M pMMO contain {approx}2 copper ions per 100 kDa protomer and exhibit copper-dependent propylene epoxidation activity. Spectroscopic data indicate that Methylocystis sp. strain M pMMO contains a mixture of Cu{sup I} and Cu{sup II}, of which the latter exhibits two distinct type 2 Cu{sup II} electron paramagnetic resonance (EPR) signals. Extended X-ray absorption fine structure (EXAFS) data are best fit with a mixture of Cu-O/N and Cu-Cu ligand environments with a Cu-Cu interaction at 2.52-2.64 {angstrom}. The crystal structure of Methylocystis sp. strain M pMMO was determined to 2.68 {angstrom} resolution and is the best quality pMMO structure obtained to date. It provides a revised model for the pmoA and pmoC subunits and has led to an improved model of M. capsulatus (Bath) pMMO. In these new structures, the intramembrane zinc/copper binding site has a different coordination environment from that in previous models.

Smith, Stephen M.; Rawat, Swati; Telser, Joshua; Hoffman, Brian M.; Stemmler, Timothy L.; Rosenzweig, Amy C. (WSU-MED); (NWU)

2012-02-08T23:59:59.000Z

325

PII S0016-7037(99)00361-0 Dissolved and particulate carbohydrates in contrasting marine sediments  

E-Print Network (OSTI)

PII S0016-7037(99)00361-0 Dissolved and particulate carbohydrates in contrasting marine sediments D) and mid-Atlantic shelf/slope break (continental margin) sediments. Particulate carbohydrates (PCHOs) rep- resented 5­9% of the total sediment particulate organic carbon (POC), and PCHO remineralization appeared

Burdige, David

326

NUCLEATION PHENOMENON IN SiC PARTICULATE REINFORCED MAGNESIUM COMPOSITE  

E-Print Network (OSTI)

NUCLEATION PHENOMENON IN SiC PARTICULATE REINFORCED MAGNESIUM COMPOSITE Y. Cai, D. Taplin, M.J. Tan performance of matrix metals and alloys. Most magnesium alloy based MMCs are produced via a casting process into the last freezing interdendritic regions. For magnesium based composites, both particle pushing (or capture

Zhou, Wei

327

The distribution of particulate aluminum in the Gulf of Mexico  

E-Print Network (OSTI)

of runoff water in the oceans. Toyota and Okabe (1967) reported vertical distri- butions of particulate aluminum ranging from 1-50 ug Al/L in samples from the Western North Pacific, Indian and Antarctic Oceans. , Stefansson and Atkinson (1969) used...

Feely, Richard Alan

1971-01-01T23:59:59.000Z

328

Achieving progressive fine granularity scalable coding in H.26L  

E-Print Network (OSTI)

Fine granularity scalable (FGS) coding and progressive fine granularity scalable (PFGS) coding are novel scalable video schemes which are ideally suited for streaming multimedia over networks with varying bandwidth, network conditions and receiver...

Shanmugampillai, Muthukumar

2012-06-07T23:59:59.000Z

329

Reproductive Efficiency of Fine-Wool Sheep.  

E-Print Network (OSTI)

B-1050 MAY 1966 REPRODUCTIVE EFFICIENCY OF FIN 'E-WOOL SHEEP TEXAS A&M UNIVERSITY TEXAS AGRICULTURAL EXPERIMENT STATION R. E. Patterson, Director, College Station, Texas CONTENTS... or adverse weather conditions at lambing, Lack of culling for reproductive efficiency. Reproductive Efficiency of Fine-wool Sheep Aiaurice Shelton, John T. Morrow and 0. D. Butler* $pectively, geneticist, Livestock and Forage Research Center, hlc...

Shelton, Maurice; Morrow, John T.; Butler, O. D.

1966-01-01T23:59:59.000Z

330

Synthesis of fine-grained TATB  

DOE Patents (OSTI)

A method for producing fine-grained triamino-trinitrobenzene (TATB) powders having improved detonation-spreading performance and hence increased shock sensitivity when compared with that for ultrafine TATB is described. A single-step, sonochemical amination of trichloro-trinitrobenzene using ammonium hydroxide solution in a sealed vessel yields TATB having approximately 6 .mu.m median particle diameter and increased shock sensitivity.

Lee, Kien-Yin (Santa Fe, NM); Kennedy, James E. (Santa Fe, NM)

2003-04-15T23:59:59.000Z

331

Filtratin and dewatering of fine coal  

SciTech Connect

A fundamental study on filtration and dewatering of fine coal is described. Experiments are being conducted in three areas: (1) the microscopic analysis of filter cakes; (2) the measurement of equilibrium desaturation; and (3) the determination of filtration and dewatering rates. Preliminary experimental results are presented together with some observations on the microstructure of filter cakes. A three dimensional network model has also been developed and is being used to analyze experimental data. 10 figures, 2 tables.

Gala, H.B.; Kakwani, R.; Chiang, S.H.; Tierney, J.W.; Klinzing, G.E.

1981-01-01T23:59:59.000Z

332

Engines - Particulate Studies - Revealing the True Nature of Diesel  

NLE Websites -- All DOE Office Websites (Extended Search)

Engine Nanoparticle Research: Revealing the True Nature of Diesel Particulates Engine Nanoparticle Research: Revealing the True Nature of Diesel Particulates Thermophoretic sampling device Argonne's test engine with the thermophoretic sampling device attached. Nanostructure of graphitic diesel soot under high engine load A transmission electron microscope reveals the nanostructures of graphitic diesel soot sampled under high engine loads. Morphology of particles collected from diesel combustion with iso-paraffin-enriched fuel. Morphology of particles collected from diesel combution with iso-paraffin-enriched fuel. Amorphous soot particle collected from biodiesel combustion undera low-temperature condition. Amorphous soot particle collected from biodiesel combustion under low temperature conditions. Researchers have many ideas about how to reduce the soot produced by diesel

333

Design characteristics for facilities which process hazardous particulate  

SciTech Connect

Los Alamos National Laboratory is establishing a research and processing capability for beryllium. The unique properties of beryllium, including light weight, rigidity, thermal conductivity, heat capacity, and nuclear properties make it critical to a number of US defense and aerospace programs. Concomitant with the unique engineering properties are the health hazards associated with processing beryllium in a particulate form and the potential for worker inhalation of aerosolized beryllium. Beryllium has the lowest airborne standard for worker protection compared to all other nonradioactive metals by more than an order of magnitude. This paper describes the design characteristics of the new beryllium facility at Los Alamos as they relate to protection of the workforce. Design characteristics to be reviewed include; facility layout, support systems to minimize aerosol exposure and spread, and detailed review of the ventilation system design for general room air cleanliness and extraction of particulate at the source.

Abeln, S.P.; Creek, K.; Salisbury, S.

1998-12-01T23:59:59.000Z

334

Fluidizable particulate materials and methods of making same  

DOE Patents (OSTI)

The invention provides fluidizable, substantially spherical particulate material of improved attrition resistance having an average particle size from about 100 to about 400 microns useful as sorbents, catalysts, catalytic supports, specialty ceramics or the like. The particles are prepared by spray drying a slurry comprising inorganic starting materials and an organic binder. Exemplary inorganic starting materials include mixtures of zinc oxide with titanium dioxide, or with iron oxide, alumina or the like. Exemplary organic binders include polyvinyl alcohol, hydroxypropylemethyl cellulose, polyvinyl acetate and the like. The spray dried particles are heat treated at a first temperature wherein organic binder material is removed to thereby provide a porous structure to the particles, and thereafter the particles are calcined at a higher temperature to cause reaction of the inorganic starting materials and to thereby form the final inorganic particulate material.

Gupta, Raghubir P. (Durham, NC)

1999-01-01T23:59:59.000Z

335

High efficiency particulate removal with sintered metal filters  

SciTech Connect

Because of their particle removal efficiencies and durability, sintered metal filters have been chosen for high efficiency particulate air (HEPA) filter protection in the off-gas treatment system for the proposed Idaho National Engineering Laboratory Transuranic Waste Treatment Facility. Process evaluation of sintered metal filters indicated a lack of sufficient process design data to ensure trouble-free operation. Subsequence pilot scale testing was performed with flyash as the test particulate. The test results showed that the sintered metal filters can have an efficiency greater than 0.9999999 for the specific test conditions used. Stable pressure drop characteristics were observed in pulsed and reversed flow blowback modes of operation. Over 4900 hours of operation were obtained with operating conditions ranging up to approximately 90/sup 0/C and 24 vol % water vapor in the gas stream.

Kirstein, B.E.; Paplawsky, W.J.; Pence, D.T.; Hedahl, T.G.

1981-01-01T23:59:59.000Z

336

Advanced hybrid particulate collector and method of operation  

DOE Patents (OSTI)

A device and method for controlling particulate air pollutants of the present invention combines filtration and electrostatic collection devices. The invention includes a chamber housing a plurality of rows of filter elements. Between the rows of filter elements are rows of high voltage discharge electrodes. Between the rows of discharge electrodes and the rows of filter elements are grounded perforated plates for creating electrostatic precipitation zones.

Miller, Stanley J. (Grand Forks, ND)

2003-04-08T23:59:59.000Z

337

RHIC | Why Does Quark Matter Matter?  

NLE Websites -- All DOE Office Websites (Extended Search)

Why Does Quark Matter 'Matter'? Why Does Quark Matter 'Matter'? The history of modern technological development can be viewed as a series of investigations, with ever increasing resolution, into the microscopic structure of matter. Since the days of the early Greek philosophers, science has been on a continual quest to find the smallest piece - the most fundamental building block - forming the substance of the universe. STAR researchers During that journey, many beautiful and exotic properties of the subatomic world have been discovered: particles with wave-like properties the ultimate position of which can never be known; "particles" of light that deliver a fixed amount of energy when they strike the atoms of a material's surface; particles in some types of electrical conductors that

338

in Condensed Matter Physics  

E-Print Network (OSTI)

Master in Condensed Matter Physics ­ Master académique #12;2 #12;3 Students at the University. Condensed matter physics is about explaining and predicting the relationship between the atomic, and broad education in the field of condensed matter physics · introduce you to current research topics

van der Torre, Leon

339

Processing and Protection of Rare Earth Permanent Magnet Particulate for Bonded Magnet Applications  

SciTech Connect

Rapid solidification of novel mixed rare earth-iron-boron, MRE{sub 2}Fe{sub 14}B (MRE = Nd, Y, Dy; currently), magnet alloys via high pressure gas atomization (HPGA) have produced similar properties and structures as closely related alloys produced by melt spinning (MS) at low wheel speeds. Recent additions of titanium carbide and zirconium to the permanent magnet (PM) alloy design in HPGA powder (using He atomization gas) have made it possible to achieve highly refined microstructures with magnetic properties approaching melt spun particulate at cooling rates of 10{sup 5}-10{sup 6}K/s. By producing HPGA powders with the desirable qualities of melt spun ribbon, the need for crushing ribbon was eliminated in bonded magnet fabrication. The spherical geometry of HPGA powders is more ideal for processing of bonded permanent magnets since higher loading fractions can be obtained during compression and injection molding. This increased volume loading of spherical PM powder can be predicted to yield a higher maximum energy product (BH){sub max} for bonded magnets in high performance applications. Passivation of RE-containing powder is warranted for the large-scale manufacturing of bonded magnets in applications with increased temperature and exposure to humidity. Irreversible magnetic losses due to oxidation and corrosion of particulates is a known drawback of RE-Fe-B based alloys during further processing, e.g. injection molding, as well as during use as a bonded magnet. To counteract these effects, a modified gas atomization chamber allowed for a novel approach to in situ passivation of solidified particle surfaces through injection of a reactive gas, nitrogen trifluoride (NF{sub 3}). The ability to control surface chemistry during atomization processing of fine spherical RE-Fe-B powders produced advantages over current processing methodologies. In particular, the capability to coat particles while 'in flight' may eliminate the need for post atomization treatment, otherwise a necessary step for oxidation and corrosion resistance. Stability of these thin films was attributed to the reduction of each RE's respective oxide during processing; recognizing that fluoride compounds exhibit a slightly higher (negative) free energy driving force for formation. Formation of RE-type fluorides on the surface was evidenced through x-ray photoelectron spectroscopy (XPS). Concurrent research with auger electron spectroscopy has been attempted to accurately quantify the depth of fluoride formation in order to grasp the extent of fluorination reactions with spherical and flake particulate. Gas fusion analysis on coated powders (dia. <45 {micro}m) from an optimized experiment indicated an as-atomized oxygen concentration of 343ppm, where typical, nonpassivated RE atomized alloys exhibit an average of 1800ppm oxygen. Thermogravimetric analysis (TGA) on the same powder revealed a decreased rate of oxidation at elevated temperatures up to 300 C, compared to similar uncoated powder.

Peter Kelly Sokolowski

2007-12-01T23:59:59.000Z

340

Immobilization of Rocky Flats Graphite Fines Residues  

SciTech Connect

The Savannah River Technology Center (SRTC) is developing an immobilization process for graphite fines residues generated during nuclear materials production activities at the Rocky Flats Environmental Technology Site (Rocky Flats). The continued storage of this material has been identified as an item of concern. The residue was generated during the cleaning of graphite casting molds and potentially contains reactive plutonium metal. The average residue composition is 73 wt percent graphite, 15 wt percent calcium fluoride (CaF2), and 12 wt percent plutonium oxide (PuO2). Approximately 950 kilograms of this material are currently stored at Rocky Flats. The strategy of the immobilization process is to microencapsulate the residue by mixing with a sodium borosilicate (NBS) glass frit and heating at nominally 700 degrees C. The resulting waste form would be sent to the Waste Isolation Pilot Plant (WIPP) for disposal. Since the PuO2 concentration in the residue averages 12 wt percent, the immobilization process was required to meet the intent of safeguards termination criteria by limiting plutonium recoverability based on a test developed by Rocky Flats. The test required a plutonium recovery of less than 4 g/kg of waste form when a sample was leached using a nitric acid/CaF2 dissolution flowsheet. Immobilization experiments were performed using simulated graphite fines with cerium oxide (CeO2) as a surrogate for PuO2 and with actual graphite fines residues. Small-scale surrogate experiments demonstrated that a 4:1 frit to residue ratio was adequate to prevent recovery of greater than 4 g/kg of cerium from simulated waste forms. Additional experiments investigated the impact of varying concentrations of CaF2 and the temperature/heating time cycle on the cerium recovery. Optimal processing conditions developed during these experiments were subsequently demonstrated at full-scale with surrogate materials and on a smaller scale using actual graphite fines.In general, the recovery of cerium from the full-scale waste forms was higher than for smaller scale experiments. The presence of CaF2 also caused a dramatic increase in cerium recovery not seen in the small-scale experiments. However, the results from experiments with actual graphite fines were encouraging. A 4:1 frit to residue ratio, a temperature of 700 degrees C, and a 2 hr heating time produced waste forms with plutonium recoveries of 4 plus/minus 1 g/kg. With an increase in the frit to residue ratio, waste forms fabricated at this scale should meet the Rocky Flats product specification. The scale-up of the waste form fabrication process to nominally 3 kg is expected to require a 5:1 to 6:1 frit to residue ratio and maintaining the waste form centerline temperature at 700 degrees C for 2 hr.

Rudisill, T. S.

1998-11-06T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Oxygen Reactivity of Devolatilized Diesel Engine Particulates from Conventional and Biodiesel Fuels  

Science Journals Connector (OSTI)

Oxygen Reactivity of Devolatilized Diesel Engine Particulates from Conventional and Biodiesel Fuels ... Abatement of diesel particulates has led to an overall decrease in the fuel efficiency of diesel engines, and overcoming these losses has been one of the more challenging problems in exhaust aftertreatment. ... (16-18) Establishing a general physical basis for modeling diesel particulate oxidation is especially challenging because of the large variations in microscopic structure that it can have. ...

Andrea Strzelec; Todd J. Toops; C. Stuart Daw

2013-06-10T23:59:59.000Z

342

Big Questions: Dark Matter  

ScienceCinema (OSTI)

Carl Sagan's oft-quoted statement that there are "billions and billions" of stars in the cosmos gives an idea of just how much "stuff" is in the universe. However scientists now think that in addition to the type of matter with which we are familiar, there is another kind of matter out there. This new kind of matter is called "dark matter" and there seems to be five times as much as ordinary matter. Dark matter interacts only with gravity, thus light simply zips right by it. Scientists are searching through their data, trying to prove that the dark matter idea is real. Fermilab's Dr. Don Lincoln tells us why we think this seemingly-crazy idea might not be so crazy after all.

Lincoln, Don

2014-08-07T23:59:59.000Z

343

Using rare earth elements to constrain particulate organic carbon flux in marginal seas.  

E-Print Network (OSTI)

??Fluxes of particulate organic carbon (POC) in the East China Sea (ECS) have been reported to decrease from the inner continental shelf towards the outer… (more)

Chen, Ya-Feng

2014-01-01T23:59:59.000Z

344

Measuring PM Distribution in a Catalyzed Particulate Filter using a Terahertz Wave Scanner  

Energy.gov (U.S. Department of Energy (DOE))

Terahertz scanning system produced 3-dimensional image of local PM density in catatalyzed particulate filters tested under loading and oxidizing conditions

345

Real-Time Particulate Mass Measurements Pre and Post Diesel Particulat...  

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

2005deeranderson.pdf More Documents & Publications Advanced Radio Frequency-Based Sensors for Monitoring Diesel Particulate Filter Loading and Regeneration Real-Time...

346

Vehicle Technologies Office Merit Review 2014: Particulate Emissions Control by Advanced Filtration Systems for GDI Engines  

Energy.gov (U.S. Department of Energy (DOE))

Presentation given by Argonne National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about particulate...

347

Development of particulate-based EPR oximetry for regional, temporal, and rapid measurements in tissue.  

E-Print Network (OSTI)

??Electron paramagnetic resonance (EPR) oximetry is a useful research technique and a potential clinical tool. The goal of this dissertation was to establish particulate-based EPR… (more)

Vikram, Deepti S.

2008-01-01T23:59:59.000Z

348

E-Print Network 3.0 - air pollution particulate Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: air pollution particulate Page: << < 1 2 3 4 5 > >> 1 COLUMBIA UNIVERSITY Department of...

349

E-Print Network 3.0 - assisted particulate filter Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

University of Nebraska-Lincoln Collection: Engineering 3 Prevention of Air Pollution from Ships: Diesel Engine Particulate Emission Reduction via Lube-Oil-Consumption...

350

Characterization of organic matter in the Oligocene (Chattian) turbiditic fine grained deposits, offshore Angola  

E-Print Network (OSTI)

a particular interest for hydrocarbon production, as deep water sandy facies may be potential oil reservoirs Angola were explored with Rock-Eval pyrolysis of 216 core samples from 4 wells. The study revealed analysis and pyrolysis-gas chromatography- mass spectrometry. Although individually the various

Boyer, Edmond

351

Variation of the fine-structure constant in QSO spectra from coherent dark matter oscillations  

Science Journals Connector (OSTI)

......solvable for other functions Q() (Dick 1999; Chabab, Markazi Saidi 2000; Slusarczyk Wereszczynski 2001, 2003), and with mass...Phys. Rev. D, 66, 123514. Chabab M. , Markazi R., Saidi E. H.,2000, Eur. Phys. J. C, 13, 543. Copeland E......

M. G. Barnett; R. Dick; K. E. Wunderle

2004-04-21T23:59:59.000Z

352

Calcination and pyroprocessing of mineral fines  

Science Journals Connector (OSTI)

ABSTRACT During the past 40 years we have witnessed an interesting development in technologies for calcination and pyroprocessing of fine-grained material. This has led to the gas suspension principles now being widely used in the cement industry and in chemical processing systems for solids. The present paper deals with the dilute-phase systems and summarises the developments over the past 10 years illustrating the importance of raw material properties and product specifications in the selection and design of GSC systems. Methods for the characterisation of raw materials, such as crushed rock, flotation concentrates and hydrates, are illustrated with examples from industrial plants operating on dolomite, limestone and alumina hydrate. KEY WORDS GSC Gas Suspension Calcination Lime, Dolime, Alumina, Minerals Processing

E.A. Neubert

1988-01-01T23:59:59.000Z

353

Prospecting by sampling and analysis of airborne particulates and gases  

DOE Patents (OSTI)

A method is claimed for prospecting by sampling airborne particulates or gases at a ground position and recording wind direction values at the time of sampling. The samples are subsequently analyzed to determine the concentrations of a desired material or the ratios of the desired material to other identifiable materials in the collected samples. By comparing the measured concentrations or ratios to expected background data in the vicinity sampled, one can select recorded wind directions indicative of the upwind position of the land-based source of the desired material.

Sehmel, G.A.

1984-05-01T23:59:59.000Z

354

X-ray absorption fine structure and magnetization characterization...  

NLE Websites -- All DOE Office Websites (Extended Search)

characterization of the metallic Co component in Co-doped ZnO thin films . X-ray absorption fine structure and magnetization characterization of the metallic Co...

355

Cooler and particulate separator for an off-gas stack  

DOE Patents (OSTI)

This report describes an off-gas stack for a melter, furnace or reaction vessel comprising an air conduit leading to two sets of holes, one set injecting air into the off-gas stack near the melter plenum and the second set injecting air downstream of the first set. The first set injects air at a compound angle, having both downward and tangential components, to create a reverse vortex flow, counter to the direction of flow of gas through the stack and also along the periphery of the stack interior surface. Air from the first set of holes prevents recirculation zones from forming and the attendant accumulation of particulate deposits on the wall of the stack and will also return to the plenum any particulate swept up in the gas entering the stack. The second set of holes injects air in the same direction as the gas in the stack to compensate for the pressure drop and to prevent the concentration of condensate in the stack. A set of sprayers, receiving water from a second conduit, is located downstream of the second set of holes and sprays water into the gas to further cool it.

Wright, G.T.

1991-04-08T23:59:59.000Z

356

Characterization and modification of particulate properties to enhance filtration performance  

SciTech Connect

The specific objectives of this project are to characterize the particulate properties that determine the filtration performance of fabric filters, and to investigate methods for modifying these particulate properties to enhance filtration performance. Inherent in these objectives is the development of an experimental approach that will lead to full-scale implementation of beneficial conditioning processes identified during the project. The general approach has included a large number of laboratory evaluations to be followed by optional field tests of a new successful conditioning processes performed on a sidestream device. This project was divided into five tasks. The schedule followed for these tasks is shown in Figure 4. Tasks 2 and 3 each focus on one of the two complementary parts of the project. Task 2 Parametric Tests of Ashes and Fabrics, evaluates the degree to which ash properties and fabric design determine filtration performance. Task 3 Survey of Methods to Modify the Particle Filtration Properties, provides a literature review and laboratory study of techniques to modify ash properties. The results of these two tasks were used in Task 4 Proof-of-Concept Tests of Methods to Modify Particle Filtration Properties to demonstrate the effects on filtration performance of modifying ash properties. The findings of all the tasks are summarized in this Final Report. 13 refs.

Snyder, T.R.; Vann Bush, P.; Robinson, M.S.

1990-06-01T23:59:59.000Z

357

Cooler and particulate separator for an off-gas stack  

DOE Patents (OSTI)

An off-gas stack for a melter comprising an air conduit leading to two sets of holes, one set injecting air into the off-gas stack near the melter plenum and the second set injecting air downstream of the first set. The first set injects air at a compound angle, having both downward and tangential components, to create a reverse vortex flow, counter to the direction of flow of gas through the stack and also along the periphery of the stack interior surface. Air from the first set of holes pervents recirculation zones from forming and the attendant accumulation of particulate deposits on the wall of the stack and will also return to the plenum any particulate swept up in the gas entering the stack. The second set of holes injects air in the same direction as the gas in the stack to compensate for the pressure drop and to prevent the concentration of condensate in the stack. A set of sprayers, receiving water from a second conduit, is located downstream of the second set of holes and sprays water into the gas to further cool it.

Wright, George T. (15 Cherry Hills Dr., Aiken, SC 29803)

1992-01-01T23:59:59.000Z

358

The Matter of Detailing  

Science Journals Connector (OSTI)

Project success is truly a “matter of detailing”! So, it is imperative that the strongest of cases must be made for the process of detailing!

Ralph W. Liebing RA; CSI; CPCA; CBO

2011-01-01T23:59:59.000Z

359

EMSL - soil organic matter  

NLE Websites -- All DOE Office Websites (Extended Search)

soil-organic-matter en Structures and Stabilities of (MgO)n Nanoclusters. http:www.emsl.pnl.govemslwebpublicationsstructures-and-stabilities-mgon-nanoclusters

360

Dark matter at colliders  

SciTech Connect

We show that colliders can impose strong constraints on dark matter. We take an effective field theory approach where dark matter couples to quarks and gluons through high dimensional operators. We discuss limits on interactions of dark matter and hadronic matter from the ATLAS experiment at the Large Hadron Collider (LHC). For spin-independent scattering, the LHC limits are stronger than those from direct detection experiments for light WIMPs. For spin-dependent scattering, the LHC sets better limits over much of parameter space.

Yu Haibo [Department of Physics, University of Michigan, Ann Arbor, MI, 48109 (United States)

2013-05-23T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Enrichment and Association of Bacteria and Particulates in Salt Marsh Surface Water  

Science Journals Connector (OSTI)

...Bacteria and Particulates in Salt Marsh Surface Water R. W. Harvey L. Y. Young Environmental...Bacteria and Particulates in Salt Marsh Surface Water R. W. HARVEY AND L. Y. YOUNG...surface. (A) Sippewissett marsh, n = 23, r = 0.91. (B) Palo Alto marsh...

R. W. Harvey; L. Y. Young

1980-04-01T23:59:59.000Z

362

Seasonality and Interaction of Biogenic and Lithogenic Particulate Flux at the Panama Basin  

Science Journals Connector (OSTI)

...particulate flux at the Panama Basin Honjo Susumu Author Woods Hole...Particulate Flux at the Panama Basin Abstract. Time-series sediment...3860 meters) in the Panama Basin. The amount ofhorizontal and...to deep water in the Panama Bight. During January through March...

SUSUMU HONJO

1982-11-26T23:59:59.000Z

363

Tensor Detection Severely Constrains Axion Dark Matter  

E-Print Network (OSTI)

The recent detection of tensor modes by BICEP2 has non-trivial implications for axion dark matter implied by combining the tensor detection with isocurvature constraints from Planck. In this paper the measurement is taken as fact, and its implications considered, though further experimental verification is required. In the simplest inflation models $r=0.2$ implies $H_I=1.1\\times 10^{14}\\text{ GeV}$. If the axion decay constant $f_a>H_I$ then isocurvature constraints effectively rule out the QCD axion as dark matter for $m_a \\lesssim 0.06\\mu$ eV, contributing only a fraction $\\Omega_a/\\Omega_d\\lesssim 10^{-11}(f_a/10^{16}\\text{ GeV})^{5/6}$ (where $\\Omega_i$ is the fraction of the critical density), with misalignment angle $\\theta_i\\lesssim 3.1 \\times 10^{-8}(f_a/10^{16}\\text{ GeV})^{-1/6}$ . Implications of this fine tuning are discussed. Constraints on axion-like particles, as a function of their mass and dark matter fraction are also considered. For heavy axions with $m_a\\gtrsim 10^{-22}\\text{ eV}$ we find ...

Marsh, David J E; Hlozek, Renee; Ferreira, Pedro G

2014-01-01T23:59:59.000Z

364

Money Matters Parent Presentation  

E-Print Network (OSTI)

Money Matters Parent Presentation Presented by Becky Lore June 7, 2014 #12;Money Matters · Dates.fcac-acfc.gc.ca · Gail Vaz-Oxlade My Money, My Choices www.gailvazoxlade.com · Money Mentors www.moneymentors.ca/ · Money

Seldin, Jonathan P.

365

Dynamical 3-Space: Alternative Explanation of the `Dark Matter Ring'  

E-Print Network (OSTI)

NASA has claimed the discovery of a `Ring of Dark Matter' in the galaxy cluster CL 0024+17, see Jee M.J. et al. arXiv:0705.2171, based upon gravitational lensing data. Here we show that the lensing can be given an alternative explanation that does not involve `dark matter'. This explanation comes from the new dynamics of 3-space. This dynamics involves two constant G and alpha - the fine structure constant. This dynamics has explained the bore hole anomaly, spiral galaxy flat rotation speeds, the masses of black holes in spherical galaxies, gravitational light bending and lensing, all without invoking `dark matter', and also the supernova redshift data without the need for `dark energy'.

Reginald T Cahill

2007-05-20T23:59:59.000Z

366

Direct and quantitative photothermal absorption spectroscopy of individual particulates  

SciTech Connect

Photonic structures can exhibit significant absorption enhancement when an object's length scale is comparable to or smaller than the wavelength of light. This property has enabled photonic structures to be an integral component in many applications such as solar cells, light emitting diodes, and photothermal therapy. To characterize this enhancement at the single particulate level, conventional methods have consisted of indirect or qualitative approaches which are often limited to certain sample types. To overcome these limitations, we used a bilayer cantilever to directly and quantitatively measure the spectral absorption efficiency of a single silicon microwire in the visible wavelength range. We demonstrate an absorption enhancement on a per unit volume basis compared to a thin film, which shows good agreement with Mie theory calculations. This approach offers a quantitative approach for broadband absorption measurements on a wide range of photonic structures of different geometric and material compositions.

Tong, Jonathan K.; Hsu, Wei-Chun; Eon Han, Sang; Burg, Brian R.; Chen, Gang, E-mail: gchen2@mit.edu [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)] [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Zheng, Ruiting [Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China)] [Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Shen, Sheng [Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)] [Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

2013-12-23T23:59:59.000Z

367

Air pollution and early deaths in the United States : attribution of PM?.? exposure to emissions species, time, location and sector  

E-Print Network (OSTI)

Combustion emissions constitute the largest source of anthropogenic emissions in the US. They lead to the degradation of air quality and human health, by contributing to the formation of fine particulate matter (PM2 .5 ), ...

Dedoussi, Irene Constantina

2014-01-01T23:59:59.000Z

368

Healthy Air Act (Maryland)  

Energy.gov (U.S. Department of Energy (DOE))

The Maryland Healthy Air Act was developed with the purpose of bringing Maryland into attainment with the National Ambient Air Quality Standards (NAAQS) for ozone and fine particulate matter by the...

369

E-Print Network 3.0 - airborne high energy Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Science 11 Learn More: www.arl.noaa.gov A Breath of Fresh Air: Improving Air Summary: for the Nation Whether it's ground-level ozone, fine particulate matter, or...

370

Effects of particulate air pollution and ozone on lung function in non-asthmatic children  

Science Journals Connector (OSTI)

AbstractIntroduction Information on the long-term effects of different air pollutant levels on lung function is relatively lacking in Asia and still inconclusive in the world. Age differential effects of air pollution are not known. Objectives To assess the acute and subchronic effects of ambient air pollution on lung function and compared among children of different ages. Methods From April to May 2011, a nationwide study was conducted on schoolchildren aged 6–15 years in 44 schools of 24 districts in Taiwan. Spirograms were obtained from 1494 non-asthmatic children. Air pollution data were retrieved from air monitoring stations within one kilometre of the schools. Using three-level hierarchical linear models, individual lung function was fitted to air pollution, with adjustments for demographics, indoor exposures, outdoor activity, and districts. Results Lung function changes per inter-quartile increase of the past two-months average levels of particulate matter <2.5 ?m (PM2.5) and ozone (12 ?g/m3, 32–44 and 6.7 ppb, 32–38, respectively) were ?103 and ?142 ml on FVC, ?86 and ?131 on FEV1, and ?102 and ?188 ml/s on MMEF, respectively. Lag-1-day ozone exposure was associated with decreased MMEF. In children aged 6–10, PM2.5 was associated with decreased FEV1/FVC and MMEF/FVC ratios. Conclusions In children aged 6–15 years, sub-chronic exposure to ambient PM2.5 and ozone leads to reduced lung capacity, whereas acute exposure to ozone decreases mid-expiratory flow. In children aged 6–10 years, additional airway obstructive patterns in lung function may be associated with PM2.5 exposure.

Chi-Hsien Chen; Chang-Chuan Chan; Bing-Yu Chen; Tsun-Jen Cheng; Yue Leon Guo

2015-01-01T23:59:59.000Z

371

MSSM inflation, dark matter, and the LHC  

Science Journals Connector (OSTI)

Inflation can occur near a point of inflection in the potential of flat directions of the minimal supersymmetric standard model (MSSM). In this paper we elaborate on the complementarity between the bounds from cosmic microwave background measurements, dark matter, and particle physics phenomenology in determining the underlying parameters of MSSM inflation by specializing to the minimal supergravity scenario. We show that the future measurements from the Large Hadron Collider in tandem with all these constraints will significantly restrict the allowed parameter space. We also suggest a new perspective on the fine tuning issue of MSSM inflation. With quantum corrections taken into account, the necessary condition between the soft supersymmetry breaking parameters in the inflaton potential can be satisfied at scales of interest without a fine tuning of their boundary values at a high scale. The requirement that this happens at the inflection point determines a dimensionless coupling, which is associated with a nonrenormalizable interaction term in the Lagrangian and has no bearing for phenomenology, to very high accuracy.

Rouzbeh Allahverdi; Bhaskar Dutta; Yudi Santoso

2010-08-17T23:59:59.000Z

372

Matter Waves and Electricity  

Science Journals Connector (OSTI)

Classical four-dimensional relativity gives a most natural and harmonious interpretation of the three basic phenomena of nature: gravity, electricity, and the wave structure of matter, provided that the basic assumptions of the Einsteinian theory are modified in two respects: (1) the fundamental invariant of the action principle is chosen as a quadratic instead of a linear function of the curvature components; (2) the static equilibrium of the world is replaced by a dynamic equilibrium. Electricity comes out as a second-order resonance effect of the matter waves. The matter waves are gravitational waves but superposed not on an empty Euclidean space but on a space of high average curvature.

Cornelius Lanczos

1942-06-01T23:59:59.000Z

373

Nature of airborne particulates at tropic exposure sites. Final report, November 1982-September 1984  

SciTech Connect

Airborne particulates were collected at five exposure sites in Panama using cascade impactor air samplers. Scanning electron microscopy, energy dispersive x-ray analysis, and culture identification techniques were used to analyze the particulates. Analysis revealed that the particulates consist of silicates, chlorides, and sulfur-rich and phosphorus-rich particles. Atmospheric particle levels were higher in the dry season than in the rainy season, and the predominant fungal species varied at each exposure site. The open direct exposure of culture plates served as a simple, appropriate method for monitoring atmospheric fungal spores.

Chen, F.; Dement, W.A.

1984-09-01T23:59:59.000Z

374

Hot and dark matter  

E-Print Network (OSTI)

In this thesis, we build new Effective Field Theory tools to describe the propagation of energetic partons in hot and dense media, and we propose two new reactions for dark matter in the early universe. In the first part, ...

D'Eramo, Francesco

2012-01-01T23:59:59.000Z

375

The Heart of Matter  

E-Print Network (OSTI)

In this article I trace the development of the human understanding of the "Heart of Matter" from early concepts of "elements" (or alternatively "Panchmahabhootas") to the current status of "quarks" and "leptons" as the fundamental constituents of matter, interacting together via exchange of the various force carrier particles called "gauge bosons" such as the photon, W/Z-boson etc. I would like to show how our understanding of the fundamental constituents of matter has gone hand in hand with our understanding of the fundamental forces in nature. I will also outline how the knowledge of particle physics at the "micro" scale of less than a Fermi(one millionth of a nanometer), enables us to offer explanations of Cosmological observations at the "macro" scale. Consequently these observations, may in turn, help us address some very fundamental questions of the Physics at the "Heart of the Matter".

Godbole, Rohini M

2010-01-01T23:59:59.000Z

376

The Heart of Matter  

E-Print Network (OSTI)

In this article I trace the development of the human understanding of the "Heart of Matter" from early concepts of "elements" (or alternatively "Panchmahabhootas") to the current status of "quarks" and "leptons" as the fundamental constituents of matter, interacting together via exchange of the various force carrier particles called "gauge bosons" such as the photon, W/Z-boson etc. I would like to show how our understanding of the fundamental constituents of matter has gone hand in hand with our understanding of the fundamental forces in nature. I will also outline how the knowledge of particle physics at the "micro" scale of less than a Fermi(one millionth of a nanometer), enables us to offer explanations of Cosmological observations at the "macro" scale. Consequently these observations, may in turn, help us address some very fundamental questions of the Physics at the "Heart of the Matter".

Rohini M. Godbole

2010-06-30T23:59:59.000Z

377

Atomic dark matter  

SciTech Connect

We propose that dark matter is dominantly comprised of atomic bound states. We build a simple model and map the parameter space that results in the early universe formation of hydrogen-like dark atoms. We find that atomic dark matter has interesting implications for cosmology as well as direct detection: Weak-scale dark atoms can accommodate hyperfine splittings of order 100 keV, consistent with the inelastic dark matter interpretation of the DAMA data while naturally evading direct detection bounds. Moreover, protohalo formation can be suppressed below M{sub proto} ? 10{sup 3}–10{sup 6}M{sub s}un for weak scale dark matter due to Ion-Radiation and Ion-Atom interactions in the dark sector.

Kaplan, David E.; Krnjaic, Gordan Z.; Rehermann, Keith R.; Wells, Christopher M., E-mail: dkaplan@pha.jhu.edu, E-mail: gordan@pha.jhu.edu, E-mail: keith@pha.jhu.edu, E-mail: cwells13@pha.jhu.edu [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686 (United States)

2010-05-01T23:59:59.000Z

378

Synchrotron x-ray fluorescence and extended x-ray absorption fine structure analysis  

SciTech Connect

The advent of dedicated synchrotron radiation sources has led to a significant increase in activity in many areas of science dealing with the interaction of x-rays with matter. Synchrotron radiation provides intense, linearly polarized, naturally collimated, continuously tunable photon beams, which are used to determine not only the elemental composition of a complex, polyatomic, dilute material but also the chemical form of the elements with improved accuracy. Examples of the application of synchrotron radiation include experiments in synchrotron x-ray fluorescence (SXRF) analysis and extended x-ray absorption fine structure (EXAFS) analysis. New synchrotron radiation x-ray microprobes for elemental analysis in the parts per billion range are under construction at several laboratories. 76 references, 24 figures.

Chen, J.R.; Gordon, B.M.; Hanson, A.L.; Jones, K.W.; Kraner, H.W.; Chao, E.C.T.; Minkin, J.A.

1984-01-01T23:59:59.000Z

379

FINE VARIATION AND FRACTAL MEASURES G. A. Edgar  

E-Print Network (OSTI)

FINE VARIATION AND FRACTAL MEASURES G. A October, 1994 Abstract. Thomson noted that (in the line) the Hausdorff measures can be * *consid of the "centered ball" basis yields an alternate description o* *f the cover- ing measures of Saint Raymond

Edgar, Gerald

380

Modified approaches for high pressure filtration of fine clean coal  

SciTech Connect

Removal of moisture from fine (minus 28 mesh) clean coal to 20% or lower level is difficult using the conventional vacuum dewatering technique. High pressure filtration technique provides an avenue for obtaining low moisture in fine clean coal. This paper describes a couple of novel approaches for dewatering of fine clean coal using pressure filtration which provides much lower moisture in fine clean coal than that obtained using conventional pressure filter. The approaches involve (a) split stream dewatering and (b) addition of paper pulp to the coal slurry. For Pittsburgh No. 8 coal slurry, split stream dewatering at 400 mesh provided filter cake containing 12.9% moisture compared to 24.9% obtained on the feed material. The addition of paper pulp to the slurry provided filter cake containing about 17% moisture.

Yang, J.; Groppo, J.G.; Parekh, B.K. [Center for Applied Energy Research, Lexington, KY (United States)

1995-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

PSH-13-0052 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2 - In the Matter of Personnel Security Hearing 2 - In the Matter of Personnel Security Hearing PSH-13-0052 - In the Matter of Personnel Security Hearing On July 9, 2013, an OHA Hearing Officer issued a decision in which he determined that an individual's DOE access authorization should be restored. A DOE Psychiatrist had found that the individual suffered from alcohol abuse. The Hearing Officer found that the Individual mitigated these security concerns at the hearing by presenting evidence that he had more than fully complied with the DOE Psychiatrist's treatment recommendations and the treatment has been effective. Steven Fine - Hearing Officer PSH-13-0052.pdf More Documents & Publications PSH-13-0083 - In the Matter of Personnel Security Hearing PSH-12-0014 - In the Matter of Personnel Security Hearing

382

PSH-12-0068 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2-0068 - In the Matter of Personnel Security Hearing 2-0068 - In the Matter of Personnel Security Hearing PSH-12-0068 - In the Matter of Personnel Security Hearing On September 24, 2012, an OHA Hearing Officer issued a decision in which he determined that an individual's DOE access authorization should not be restored. The Individual had a history of four arrests, one of which was alcohol-related. A DOE Psychologist diagnosed the individual with Alcohol-Related Disorder, Not Otherwise Specified. The Hearing Officer found that the Individual had not mitigated any of these security concerns at the hearing. OHA Case No. PSH-12-0068 Steven L. Fine - Hearing Officer PSH-12-0068.pdf More Documents & Publications PSH-12-0129 - In the Matter of Personnel Security Hearing PSH-12-0131 - In the Matter of: Personnel Security Hearing

383

PSH-12-0068 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8 - In the Matter of Personnel Security Hearing 8 - In the Matter of Personnel Security Hearing PSH-12-0068 - In the Matter of Personnel Security Hearing On September 24, 2012, an OHA Hearing Officer issued a decision in which he determined that an individual's DOE access authorization should not be restored. The Individual had a history of four arrests, one of which was alcohol-related. A DOE Psychologist diagnosed the individual with Alcohol-Related Disorder, Not Otherwise Specified. The Hearing Officer found that the Individual had not mitigated any of these security concerns at the hearing. OHA Case No. PSH-12-0068 Steven L. Fine - Hearing Officer PSH-12-0068.pdf More Documents & Publications PSH-12-0129 - In the Matter of Personnel Security Hearing PSH-11-0035 - In the Matter of Personnel Security Hearing

384

Air Pollution Control Regulations: No. 3- Particulate Emissions from Industrial Processes (Rhode Island)  

Energy.gov (U.S. Department of Energy (DOE))

These regulations limit particulate emissions into the atmosphere by process weight per hour, where process weight is the total weight of all materials introduced into any specific process which...

385

Engine-External HC-Dosing for Regeneration of Diesel Particulate...  

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

for Heavy Duty and NRMM According to Annex XXVII StVZO This presentation discusses how a diesel particulate filter can be integrated in the exhaust piping of a heavy-duty engine....

386

fundamental Modeling and Experimental Studies of Acicular Mullite Diesel Particulate Filters  

Energy.gov (U.S. Department of Energy (DOE))

Pore-scale simulations of filtration and regeneration in acicular muillite diesel particulate filters have suggested underlying mechanisms that contribute to lower back pressures compared to other common DPF substrates.

387

Determination of particulate lead using aerosol mass spectrometry: MILAGRO/MCMA-2006 observations  

E-Print Network (OSTI)

We report the first measurements of particulate lead (Pb) from Aerodyne Aerosol Mass Spectrometers, which were deployed in and around Mexico City during the Megacity Initiative: Local and Global Research Observations ...

Salcedo, D.

388

Astrophysical constraints on millicharged atomic dark matter  

E-Print Network (OSTI)

Some models of inelastic dark matter posit the existence of bound states under some new $U(1)'$ gauge symmetry. If this new dark photon kinetically mixes with the standard model photon, then the constituent particles in these bound states can acquire a fractional electric charge. This electric charge renders a dark-matter medium dispersive. We compute this frequency-dependent index of refraction for such a medium and use the frequency-dependent arrival time of light from astrophysical sources to constrain the properties of dark atoms in the medium. Using optical-wavelength observations from the Crab Pulsar, we find the electric millicharge of dark (electrons) protons to be smaller than the electric charge $e$ for dark atom masses below 100 keV, assuming a dark fine structure constant $\\boldsymbol{\\alpha}=1$. We estimate that future broadband observations of gamma-ray bursts can produce constraints on the millicharge of dark atoms with masses in the keV range that are competitive with existing collider constra...

Kvam, Audrey K

2014-01-01T23:59:59.000Z

389

Astrophysical constraints on millicharged atomic dark matter  

E-Print Network (OSTI)

Some models of inelastic dark matter posit the existence of bound states under some new $U(1)'$ gauge symmetry. If this new dark photon kinetically mixes with the standard model photon, then the constituent particles in these bound states can acquire a fractional electric charge. This electric charge renders a dark-matter medium dispersive. We compute this frequency-dependent index of refraction for such a medium and use the frequency-dependent arrival time of light from astrophysical sources to constrain the properties of dark atoms in the medium. Using optical-wavelength observations from the Crab Pulsar, we find the electric millicharge of dark (electrons) protons to be smaller than the electric charge $e$ for dark atom masses below 100 keV, assuming a dark fine structure constant $\\boldsymbol{\\alpha}=1$. We estimate that future broadband observations of gamma-ray bursts can produce constraints on the millicharge of dark atoms with masses in the keV range that are competitive with existing collider constraints.

Audrey K. Kvam; David C. Latimer

2014-12-01T23:59:59.000Z

390

Optical backscatter probe for sensing particulate in a combustion gas stream  

DOE Patents (OSTI)

A system for sensing particulate in a combustion gas stream is disclosed. The system transmits light into a combustion gas stream, and thereafter detects a portion of the transmitted light as scattered light in an amount corresponding to the amount of particulates in the emissions. Purge gas may be supplied adjacent the light supply and the detector to reduce particles in the emissions from coating or otherwise compromising the transmission of light into the emissions and recovery of scattered light from the emissions.

Parks, James E; Partridge, William P

2013-05-28T23:59:59.000Z

391

Flocking at a distance in active granular matter  

E-Print Network (OSTI)

The self-organised motion of vast numbers of creatures in a single direction is a spectacular example of emergent order. We recreate this phenomenon using actuated non-living components. We report here that millimetre-sized tapered rods, rendered motile by contact with an underlying vibrated surface and interacting through a medium of spherical beads, undergo a phase transition to a state of spontaneous alignment of velocities and orientations above a threshold bead area fraction. Guided by a detailed simulation model, we construct an analytical theory of this flocking transition, with two ingredients: a moving rod drags beads; neighbouring rods reorient in the resulting flow like a weathercock in the wind. Theory and experiment agree on the structure of our phase diagram in the plane of rod and bead concentrations and power-law spatial correlations near the phase boundary. Our discovery suggests possible new mechanisms for the collective transport of particulate or cellular matter.

Nitin Kumar; Harsh Soni; Sriram Ramaswamy; A. K. Sood

2014-02-18T23:59:59.000Z

392

Materials/Condensed Matter  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials/Condensed Matter Print Materials/Condensed Matter Print Materials research provides the foundation on which the economic well being of our high-tech society rests. The impact of advanced materials ranges dramatically over every aspect of our modern world from the minutiae of daily life to the grand scale of our national economy. Invariably, however, breakthroughs to new technologies trace their origin both to fundamental research in the basic properties of condensed matter and to applied research aimed at manipulating properties (structural, physical, chemical, electrical, magnetic, optical, etc.). Increasingly, the frontiers of materials research include materials that are "strongly correlated," characterized by strong coupling between a material's electrons with other electrons, magnetism, or the material lattice itself. This coupling often results in novel behavior, such as superconductivity, that may lead to technologically important applications.

393

Thermodynamics of clusterized matter  

E-Print Network (OSTI)

Thermodynamics of clusterized matter is studied in the framework of statistical models with non-interacting cluster degrees of freedom. At variance with the analytical Fisher model, exact Metropolis simulation results indicate that the transition from homogeneous to clusterized matter lies along the $\\rho=\\rho_0$ axis at all temperatures and the limiting point of the phase diagram is not a critical point even if the surface energy vanishes at this point. Sensitivity of the inferred phase diagram to the employed statistical framework in the case of finite systems is discussed by considering the grand-canonical and constant-pressure canonical ensembles. A Wigner-Seitz formalism in which the fragment charge is neutralized by an uniform electron distribution allows to build the phase diagram of neutron star matter.

Ad. R. Raduta; F. Gulminelli

2009-02-28T23:59:59.000Z

394

Hierarchical Bivariate Time Series Models: A Combined Analysis of the Effects of Particulate Matter on Morbidity and  

E-Print Network (OSTI)

manufacturers. Funding for Francesca Dominici was provided by a grant from the Health Effects Institute (Walter Effects Institute (HEI), an organization jointly funded by the Environmental Protection Agency (EPA R@jhsph.edu. Acknowledgments: Research described in this article was partially supported by a contract and grant from Health

Dominici, Francesca

395

Evaluating point and process fugitive emission sources of particulate matter from feed mills associated with cattle feed yards  

E-Print Network (OSTI)

.e. by emitting more than 90.7 tonnes (100 tons) of a regulated pollutant annually) to obtain from its state air pollution regulatory agency (SAPRA) a federal operating permit (FOP). The results from this study will be used to develop scientifically based emission...

Demny, Michael Alan

2012-06-07T23:59:59.000Z

396

Exposure information in environmental health research: Current opportunities and future directions for particulate matter, ozone, and toxic air pollutants  

E-Print Network (OSTI)

urban analysis of air pollution health effects, remainsderived from community air pollution health studies. Recentused to link them, in air pollution health studies including

McKone, Thomas E.

2008-01-01T23:59:59.000Z

397

Development and Demonstration of an Electronic Particulate Matter Sensor for Both Engine-Out and Post-DPF Exhaust Monitoring  

Energy.gov (U.S. Department of Energy (DOE))

Demanding emission legislation has created a need for low-cost, sensitive, accurate, and robust PM sensors for OBD

398

SURFACE OXIDATION OF DIESEL PARTICULATE MATTER IN PRESENCE OF O3 +NOX: NEW TD/GC/MS ANALYSIS METHOD  

E-Print Network (OSTI)

in the atmosphere. TD-GC-MS ANALYSIS METHODOLOGY A thermal desorption (TD) injection device (M. Ezrin, 1991. Valve Spindle 10. Carrier Gas Inlet 11. Inlet Assembly 12. Injection Port Insert PAH standard Solution, 1ppm, 1µL injection Alkanes Standard Solution, 0.1ppm, 1µL injection FUTURE EXPERIMENTS Verify PM

Holmén, Britt A.

399

A refined biomonitoring study of airborne particulate matter pollution in Rome, with magnetic measurements on Quercus Ilex tree leaves  

Science Journals Connector (OSTI)

......in cities both in space and time. We report...industry, domestic heating or vehicles, as...such as building constructions or natural fires...developed an industrial sector and it has little...favoured domestic heating or long-range...holder during the heating run. In this study......

Michael Szönyi; Leonardo Sagnotti; Ann M. Hirt

2008-04-01T23:59:59.000Z

400

Global Emissions of Trace Gases, Particulate Matter, and Hazardous Air Pollutants from Open Burning of Domestic Waste  

Science Journals Connector (OSTI)

For each country, the amount of waste burned (WB) is estimated using the general guidelines from section 5.3.2 in the 2006 IPCC Guidelines for National GHG Inventories:(4)(2)where P is the national population, Pfrac is the fraction of the population assumed to burn some of their waste, MSWP is the mass of annual per capita waste production, and Bfrac is the fraction of waste available to be burned that is actually burned. ... In urban areas, waste that is not collected is assumed to be burnable. ... Among the most important sources, open fires in agriculture/forests as well as open burning of wastes have been identified as the major sources of PCDD/PCDF. ...

Christine Wiedinmyer; Robert J. Yokelson; Brian K. Gullett

2014-07-14T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

A refined biomonitoring study of airborne particulate matter pollution in Rome, with magnetic measurements on Quercus Ilex tree leaves  

Science Journals Connector (OSTI)

......delineate spatial airborne anthropogenic PM...the PM magnetic fraction which can then be...constructions or natural fires. This study has...particles in the airborne PM by means of standard...idling cars do not release an equally high...of the magnetic fraction. In this study......

Michael Szönyi; Leonardo Sagnotti; Ann M. Hirt

2008-04-01T23:59:59.000Z

402

Identification of Lubrication Oil in the Particulate Matter Emissions from Engine Exhaust of In-Service Commercial Aircraft  

Science Journals Connector (OSTI)

This material is available free of charge via the Internet at http://pubs.acs.org. ... We are also grateful for the assistance and logistical support offered by John Jayne, Bill Brooks, and Tim Onasch at ARI during instrument preparation activities and laboratory studies. ... The characterization of volatile and nonvolatile particle materials present in gas turbine exhaust is crit. ...

Zhenhong Yu; Scott C. Herndon; Luke D. Ziemba; Michael T. Timko; David S. Liscinsky; Bruce E. Anderson; Richard C. Miake-Lye

2012-08-07T23:59:59.000Z

403

A refined biomonitoring study of airborne particulate matter pollution in Rome, with magnetic measurements on Quercus Ilex tree leaves  

Science Journals Connector (OSTI)

......distance from fossil fuel power stations...quantification of pollution in Kathmandu...screening of a pollution hotspot in the...quantification of urban pollution sources in atmospheric...Biomonitoring of air quality in Cologne...spinel solid solutions, Phys. Chem......

Michael Szönyi; Leonardo Sagnotti; Ann M. Hirt

2008-04-01T23:59:59.000Z

404

A refined biomonitoring study of airborne particulate matter pollution in Rome, with magnetic measurements on Quercus Ilex tree leaves  

Science Journals Connector (OSTI)

......causes adverse effects to human health. Specific magnetic susceptibility...proposing guidelines concerning human health and the exposure of the population...iron-bearing magnetic PM is dangerous to the human health due to its aggressively reacting......

Michael Szönyi; Leonardo Sagnotti; Ann M. Hirt

2008-04-01T23:59:59.000Z

405

Hydrogen Peroxide Formation in a Surrogate Lung Fluid by Transition Metals and Quinones Present in Particulate Matter  

Science Journals Connector (OSTI)

To address this, we use a cell-free, surrogate lung fluid (SLF) to quantify the initial rate of HOOH formation from 10 transition metals and 4 quinones commonly identified in PM. ... Copper, 1,2-naphthoquinone, 1,4-naphthoquinone, and phenanthrenequinone all form HOOH in a SLF, but only copper and 1,2-naphthoquinone are likely important at ambient concentrations. ... Given the uncertainties in our understanding of HOOH production from ambient PM, our purpose is to quantify HOOH formation from transition metals and quinones (both individually and in mixtures) in a more representative (though still cell-free) surrogate lung fluid (SLF). ...

Jessica G. Charrier; Alexander S. McFall; Nicole K. Richards-Henderson; Cort Anastasio

2014-05-23T23:59:59.000Z

406

Barium in Twilight Zone suspended matter as a potential proxy for particulate organic carbon remineralization: Results for the North Pacific  

E-Print Network (OSTI)

considering TdR conversion factors 1 and 2 x 10 18 cellsrates using TdR conversion factors of 1 - 2 x 10 18mol -1 and a carbon conversion factor of 15 fg C cell -1 ;

Dehairs, F.

2008-01-01T23:59:59.000Z

407

Antihelium from Dark Matter  

E-Print Network (OSTI)

Cosmic-ray anti-nuclei provide a promising discovery channel for the indirect detection of particle dark matter. Hadron showers produced by the pair-annihilation or decay of Galactic dark matter generate anti-nucleons which can in turn form light anti-nuclei. Previous studies have only focused on the spectrum and flux of low energy antideuterons which, although very rarely, are occasionally also produced by cosmic-ray spallation. Heavier elements ($A\\geq3$) have instead entirely negligible astrophysical background and a primary yield from dark matter which could be detectable by future experiments. Using a Monte Carlo event generator and an event-by-event phase space analysis, we compute, for the first time, the production spectrum of \\antihe and \\antiT for dark matter annihilating or decaying to $b\\bar{b}$ and ${W^+}{W^-}$ final states. We then employ a semi-analytic model of interstellar and heliospheric propagation to calculate the \\antihe flux as well as to provide tools to relate the anti-helium spectrum...

Carlson, Eric; Linden, Tim; Profumo, Stefano; Ibarra, Alejandro; Wild, Sebastian

2014-01-01T23:59:59.000Z

408

Antihelium from dark matter  

Science Journals Connector (OSTI)

Cosmic-ray antinuclei provide a promising discovery channel for the indirect detection of particle dark matter. Hadron showers produced by the pair annihilation or decay of Galactic dark matter generate antinucleons which can in turn form light antinuclei. Previous studies have only focused on the spectrum and flux of low energy antideuterons which, although very rarely, are occasionally also produced by cosmic-ray spallation. Heavier elements (A?3) have instead entirely negligible astrophysical background and a primary yield from dark matter which could be detectable by future experiments. Using a Monte Carlo event generator and an event-by-event phase space analysis, we compute, for the first time, the production spectrum of HeŻ3 and HŻ3 for dark matter annihilating or decaying to bbŻ and W+W? final states. We then employ a semianalytic model of interstellar and heliospheric propagation to calculate the HeŻ3 flux as well as to provide tools to relate the antihelium spectrum corresponding to an arbitrary antideuteron spectrum. Finally, we discuss prospects for current and future experiments, including GAPS and AMS-02.

Eric Carlson; Adam Coogan; Tim Linden; Stefano Profumo; Alejandro Ibarra; Sebastian Wild

2014-04-08T23:59:59.000Z

409

Tunguska Dark Matter Ball  

E-Print Network (OSTI)

It is suggested that the Tunguska event in June 1908 cm-large was due to a cm-large ball of a condensate of bound states of 6 top and 6 anti-top quarks containing highly compressed ordinary matter. Such balls are supposed to make up the dark matter as we earlier proposed. The expected rate of impact of this kind of dark matter ball with the earth seems to crudely match a time scale of 200 years between the impacts. The main explosion of the Tunguska event is explained in our picture as material coming out from deep within the earth, where it has been heated and compressed by the ball penetrating to a depth of several thousand km. Thus the effect has some similarity with volcanic activity as suggested by Kundt. We discuss the possible identification of kimberlite pipes with earlier Tunguska-like events. A discussion of how the dark matter balls may have formed in the early universe is also given.

C. D. Froggatt; H. B. Nielsen

2014-03-27T23:59:59.000Z

410

Tunguska Dark Matter Ball  

E-Print Network (OSTI)

It is suggested that the Tunguska event in June 1908 cm-large was due to a cm-large ball of a condensate of bound states of 6 top and 6 anti-top quarks containing highly compressed ordinary matter. Such balls are supposed to make up the dark matter as we earlier proposed. The expected rate of impact of this kind of dark matter ball with the earth seems to crudely match a time scale of 200 years between the impacts. The main explosion of the Tunguska event is explained in our picture as material coming out from deep within the earth, where it has been heated and compressed by the ball penetrating to a depth of several thousand km. Thus the effect has some similarity with volcanic activity as suggested by Kundt. We discuss the possible identification of kimberlite pipes with earlier Tunguska-like events. A discussion of how the dark matter balls may have formed in the early universe is also given.

Froggatt, C D

2014-01-01T23:59:59.000Z

411

Matter & Energy Nanotechnology  

E-Print Network (OSTI)

to electrical energy in order to power electronic devices, these results point to an advantage in reducingSee Also: Matter & Energy Nanotechnology Materials Science Technology Energy Technology Civil of potential functionalities, ranging from single-nanowire lasers and LEDs to more complex devices

Espinosa, Horacio D.

412

Matter & Energy Nanotechnology  

E-Print Network (OSTI)

See also: Matter & Energy Nanotechnology Civil Engineering Chemistry Computers & Math Computer www.carbodeon.com Nanotechnology afm Perform better live cell research! Non-invasive, in-liquid AFM cures Had flu? You m Science News Share Blog Cite Health & Medicine Mind & Brain Plants & Animals Earth

Espinosa, Horacio D.

413

Matter & Energy Wind Energy  

E-Print Network (OSTI)

See Also: Matter & Energy Wind Energy Energy Technology Physics Nuclear Energy Petroleum 27, 2012) -- Energy flowing from large-scale to small-scale places may be prevented from flowing, indicating that there are energy flows from large to small scale in confined space. Indeed, under a specific

Shepelyansky, Dima

414

Matter & Energy Solar Energy  

E-Print Network (OSTI)

See Also: Matter & Energy Solar Energy· Electronics· Materials Science· Earth & Climate Energy and the Environment · Renewable Energy· Environmental Science · Reference Chemical compound· Semiconductor· Gallium at the University of Illinois, the future of solar energy just got brighter. Although silicon is the industry

Rogers, John A.

415

Matter & Energy Engineering  

E-Print Network (OSTI)

. AmericanEnergyProperties.com Related Stories New Facility BoostsGasHydrates Research (June 2, 2008) --A new & Climate Global Warming Environmental Issues Climate Reference Natural gas Hydrocarbon Automobile emissionsLike 6 0 | More APA MLA See Also: Matter & Energy Petroleum Engineering Fossil Fuels Earth

Sóbester, András

416

Dark matter, not magnetism  

Science Journals Connector (OSTI)

......Astronomical Society. Provided by the NASA Astrophysics Data System 1 March 1993 research-article Letters Dark matter, not magnetism Massimo Persic 1 2 Paolo Salucci 1 1 Notice that most optical rotation curves, coming from the gas-emitted H alpha line......

Massimo Persic; Paolo Salucci

1993-03-01T23:59:59.000Z

417

Microsoft Word - Finely_NorthValley_CX.docx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Cecilia Brown Cecilia Brown Project Manager - KEWM-4 Proposed Action: Finely Creek and North Valley Creek property funding Fish and Wildlife Project No. and Contract No.: 2002-003-00, BPA-58888 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.25 Real property transfers for cultural resources protection, habitat preservation, and wildlife management Location: Finely Creek: Township 16 North, Range 20 West, Section 24; Missoula County, MT. North Valley Creek: Township 17 North, Range 20 West, Section 19; Lake County, MT. Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to fund the Confederated Salish and Kootenai Tribes (CSKT) for the purchase of 9 acres of property, referred to as the Finely Creek Property,

418

Fine root dynamics in a developing Populus deltoides plantation.  

SciTech Connect

A closely spaced (1 x 1 m) cottonwood (Populus deltoides Bartr.) platation was established to evaluate the effects of nutrient availability on fine root dynamics. Slow-release fertilizer (17:6:12 N,P,K plus micronutrients) was applied to 225-m2 plots at 0, 50, 100, 200 kg N ha-1, and plots were monitored for two growing seasons. Fine root production, mortality, live root standing crop and life span were analyzed based on monthly minirhizotron observations. Fine root biomass was measured in soil cores. Fine root dynamics were controlled more by temporal, depth and root diameter factors than by fertilization. Cumulative fine root production and mortality showed strong seasonal patterns; production was greatest in the middle of the growing season and mortality was greatest after the grwoing season. Small diameter roots at shallow soil depths cycled more rapidly than large or deeper roots. The strongest trearment effects were found in the most rapidly cycling roots. The standing crop of live roots increased with fertilizer treatment according to both minirhizotron and soil coring methods. However, production and mortality had unique treatment response patterns. Although cumulative mortality decreased in response to increased fertilization, cumulative production was intermediate at 0 kg N ha-1, lowest with 50 kg N ha-1, and highest with 200 kg N ha-1. Above ground growth responded positively to fertilization up to an application rate of 50 kg N ha-1 but no further increase in application rate. Median fine root life span varied from 307 to over 700 day and increased with depth, diameter and nutrient availability.

Kern, Christel C.; Friend, Alexander L.; Johnson, Jane M.; Coleman, Mark D.

2004-07-01T23:59:59.000Z

419

Dark Matter Gravitational Interactions  

E-Print Network (OSTI)

We argue that the conjectured dark mater in the Universe may be endowed with a new kind of gravitational charge that couples to a short range gravitational interaction mediated by a massive vector field. A model is constructed that assimilates this concept into ideas of current inflationary cosmology. The model is also consistent with the observed behaviour of galactic rotation curves according to Newtonian dynamics. The essential idea is that stars composed of ordinary (as opposed to dark matter) experience Newtonian forces due to the presence of an all pervading background of massive gravitationally charged cold dark matter. The novel gravitational interactions are predicted to have a significant influence on pre-inflationary cosmology. The precise details depend on the nature of a gravitational Proca interaction and the description of matter. A gravitational Proca field configuration that gives rise to attractive forces between dark matter charges of like polarity exhibits homogeneous isotropic eternal cosmologies that are free of cosmological curvature singularities thus eliminating the horizon problem associated with the standard big-bang scenario. Such solutions do however admit dense hot pre-inflationary epochs each with a characteristic scale factor that may be correlated with the dark matter density in the current era of expansion. The model is based on a theory in which a modification of Einsteinian gravity at very short distances can be expressed in terms of the gradient of the Einstein metric and the torsion of a non-Riemannian connection on the bundle of linear frames over spacetime. Indeed we demonstrate that the genesis of the model resides in a remarkable simplification that occurs when one analyses the variational equations associated with a broad class of non-Riemannian actions.

R. W. Tucker; C. Wang

1996-12-09T23:59:59.000Z

420

Energy Matters in Washington State Page 1 Energy Matters  

E-Print Network (OSTI)

Energy Matters in Washington State ­ Page 1 Energy Matters in Washington State June 2008 Updated November 2009 Updated and Revised October 2013 Grand Coulee Dam #12;Energy Matters in Washington State ­ Page 2 Copyright © 2013 Washington State University Energy Program. 905 Plum Street SE, P.O. Box 43169

Collins, Gary S.

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


421

The Search for Dark Matter  

ScienceCinema (OSTI)

More than 25 years ago, PNNL scientists began the first underground measurements searching for dark matter using specialized radiation detector technology. Dark matter is yet to be discovered says Physicist John L. Orrell.

Orrell, John

2014-07-24T23:59:59.000Z

422

The Search for Dark Matter  

SciTech Connect

More than 25 years ago, PNNL scientists began the first underground measurements searching for dark matter using specialized radiation detector technology. Dark matter is yet to be discovered says Physicist John L. Orrell.

Orrell, John

2013-11-20T23:59:59.000Z

423

Quantum Condensed Matter | More Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Quantum Condensed Matter SHARE Quantum Condensed Matter Neutron scattering is a uniquely powerful probe for measuring the structure and dynamics of condensed matter. As such it is...

424

Quantum Condensed Matter | Neutron Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Quantum Condensed Matter SHARE Quantum Condensed Matter Neutron scattering is a uniquely powerful probe for measuring the structure and dynamics of condensed matter. As such it is...

425

Direct search for dark matter  

SciTech Connect

Dark matter is hypothetical matter which does not interact with electromagnetic radiation. The existence of dark matter is only inferred from gravitational effects of astrophysical observations to explain the missing mass component of the Universe. Weakly Interacting Massive Particles are currently the most popular candidate to explain the missing mass component. I review the current status of experimental searches of dark matter through direct detection using terrestrial detectors.

Yoo, Jonghee; /Fermilab

2009-12-01T23:59:59.000Z

426

DEMONSTRATION OF A FULL-SCALE RETROFIT OF THE ADVANCED HYBRID PARTICULATE COLLECTOR TECHNOLOGY  

SciTech Connect

The Advanced Hybrid Particulate Collector (AHPC), developed in cooperation between W.L. Gore & Associates and the Energy & Environmental Research Center (EERC), is an innovative approach to removing particulates from power plant flue gas. The AHPC combines the elements of a traditional baghouse and electrostatic precipitator (ESP) into one device to achieve increased particulate collection efficiency. As part of the Power Plant Improvement Initiative (PPII), this project was demonstrated under joint sponsorship from the U.S. Department of Energy and Otter Tail Power Company. The EERC is the patent holder for the technology, and W.L. Gore & Associates was the exclusive licensee for this project. The project objective was to demonstrate the improved particulate collection efficiency obtained by a full-scale retrofit of the AHPC to an existing electrostatic precipitator. The full-scale retrofit was installed on an electric power plant burning Powder River Basin (PRB) coal, Otter Tail Power Company's Big Stone Plant, in Big Stone City, South Dakota. The $13.4 million project was installed in October 2002. Project related testing concluded in December 2005. The following Final Technical Report has been prepared for the project entitled ''Demonstration of a Full-Scale Retrofit of the Advanced Hybrid Particulate Collector Technology'' as described in DOE Award No. DE-FC26-02NT41420. The report presents the operation and performance results of the system.

Tom Hrdlicka; William Swanson

2005-12-01T23:59:59.000Z

427

PSH-12-0033 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

33 - In the Matter of Personnel Security Hearing 33 - In the Matter of Personnel Security Hearing PSH-12-0033 - In the Matter of Personnel Security Hearing On June 27, 2012, an OHA Hearing Officer issued a decision in which he determined that an individual's DOE access authorization should not be restored. The Individual had a history of nine arrests, seven of which were alcohol-related. In addition, the Individual had provided inaccurate and incomplete information to security officials during his background investigation. The Hearing Officer found that the Individual's credibility was suspect and therefore concluded that the Individual had not mitigated any of these security concerns at the hearing. Steven L. Fine - Hearing Officer PSH-12-0033.pdf More Documents & Publications PSH-13-0071 - In the Matter of Personnel Security Hearing

428

'Dark Matter' as a Quantum Foam In-Flow Effect  

E-Print Network (OSTI)

The galactic `dark matter' effect is regarded as one of the major problems in fundamental physics. Here it is explained as a self-interaction dynamical effect of space itself, and so is not caused by an unknown form of matter. Because it was based on Kepler's Laws for the motion of the planets in the solar system the Newtonian theory of gravity was too restricted. A reformulation and generalisation of the Newtonian theory of gravity in terms of a velocity in-flow field, representing at a classical level the relative motion of a quantum-foam substructure to space, reveals a key dynamical feature of the phenomenon of gravity, namely the so called `dark matter' effect, which manifests not only in spiral galaxy rotation curves, but also in the borehole g anomaly, globular and galactic black holes, and in ongoing problems in improving the accuracy with which Newton's gravitational constant G is measured. The new theory of gravity involves an additional new dimensionless gravitational constant, and experimental data reveals this to be the fine structure constant. The new theory correctly predicts the globular cluster black hole masses, and that the `frame-dragging' effect is caused by vorticity in the in-flow. The relationship of the new theory of gravity to General Relativity which, like Newtonian gravity, does not have the `dark matter' dynamics, is explained.

Reginald T. Cahill

2005-08-25T23:59:59.000Z

429

09-10 Catalog Date ________________________ FINE ARTS: STUDIO  

E-Print Network (OSTI)

include 12 hours of social sciences [at least 2 different areas; 6 hours above freshman level]) 3000 2650 2750 ("C" or better necessary to move to next level of studio work in a given area.) 9 Fine Arts Option (one area) __________ __________ __________ __________* *Senior project in area of concentration

Kulp, Mark

430

BWR ATWS mitigation by Fine Motion Control Rod  

SciTech Connect

Two main methods of ATWS mitigation in a SBWR are: fine Motion control Rods (FMCRD) and Boron injection via the Standby Liquid control System (SLCS). This study has demonstrated that the use of FMCRD along with feedwater runback mitigated the conditions due to reactivity insertion and possible ATWS in a BWR which is similar to SBWR.

Rohatgi, U.S.; Cheng, H.S.; Khan, H.; Mallen, A.; Diamond, D.

1994-03-01T23:59:59.000Z

431

WASHLOAD AND FINE SEDIMENT LOAD By Hyoseop S. Woo,1  

E-Print Network (OSTI)

WASHLOAD AND FINE SEDIMENT LOAD By Hyoseop S. Woo,1 Pierre Y. Julien,2 M. ASCE, and Everett V describes it very distinctly. He stated that if the sediment is added to the upstream end of a concrete channel and the channel is swept clean, and the sediment has not left any trace in the channel, its rate

Julien, Pierre Y.

432

Fine tuning of graphene-metal adhesion by surface alloying  

E-Print Network (OSTI)

Fine tuning of graphene-metal adhesion by surface alloying D. Alfe`1,2 , M. Pozzo1 , E. Miniussi3 route for governing the interaction between graphene and metal through the selective choice characterization of the properties of graphene on a model PtRu surface alloy on Ru(0001), with a concentration

Alfè, Dario

433

Evaluation of fine-granular GPS tracking on smartphones  

Science Journals Connector (OSTI)

Smartphones with their GPS capabilities allow tracking in numerous scenarios at low costs. Whereas most scenarios need only coarse tracking, real-time tracking of competitors in sport events require fine-granular localization with high refresh frequencies. ... Keywords: GPS performance, evaluation, mobile localization and tracking, smartphone application for GIS

Basil Hess; Armin Zamani Farahani; Fabian Tschirschnitz; Felix von Reischach

2012-11-01T23:59:59.000Z

434

Fine and coarse components in surface sediments from Bikini Lagoon  

SciTech Connect

In 1979, 21 years after the moratorium on nuclear testing in the Marshall Islands, surface sediment samples (to depths of 2 and 4 cm) were collected from 87 locations in the lagoon of Bikini Atoll, one of the two sites in the Marshall Islands used by the United States to test nuclear devices from 1946 through 1958. The main purpose for the collections was to map the distribution of long-lived man-made radionuclides associated with the bottom material. In addition the samples were processed to estimate the fraction of fine and coarse components to show, by comparison, what modifications occurred in the composition since the sediments were first described in samples collected before testing in 1946. Nuclear testing produced more finely divided material that is now found in the surface sediment layer over large areas of the lagoon and especially in regions of the lagoon and reef adjacent to test sites. The 5 cratering events alone at Bikini Atoll redistributed sufficient material to account for the higher inventory of fine material found over the surface 4 cm of the sediment of the lagoon. Although the fraction of fine material in the bottom sediments was altered by the nuclear events, the combined processes of formation, transport and deposition were not sufficiently dynamic to greatly change the general geographical features of the major sedimentary components over most of the lagoon floor.

Noshkin, V. E., LLNL

1997-01-01T23:59:59.000Z

435

Brookhaven Condensed Matter Physics  

NLE Websites -- All DOE Office Websites (Extended Search)

Condensed Matter Physics Condensed Matter Physics Condensed matter physicists study the properties of bulk matter-solids and liquids-as well as the properties exhibited at surfaces and interfaces, with a view to obtaining a fundamental understanding of the unusual properties that materials can exhibit. These problems are some of the most challenging in physics today, but have the huge pay-off in that such an understanding may ultimately lead to improved materials for use in applications as diverse as computing, memory storage, electric motors, and energy storage and transport. At Brookhaven Lab, this work includes both experimental and theoretical studies. Much of the experimental work carried out today uses the National Synchrotron Light Source (NSLS, shown at right)-one of the premiere synchrotron light sources of the last two decades. Commissioned in the 1980s, the NSLS is host to more than 2,200 users per year and produces copious amounts of light, from the infrared to the ultraviolet to the x-ray. By using this light as a probe, scientists can learn about the arrangement of the atoms and electrons in the materials and how they behave under various conditions. Among other projects, BNL scientists have played leading roles in the development and application of resonant and inelastic x-ray scattering techniques to the study of magnetic and other materials, have pioneered the use of photoemission techniques (based on the photoelectric effect that Einstein first understood 100 years ago) for looking at electronic and magnetic materials, and have carried out some of the seminal experiments to understand the atomic and magnetic structure at surfaces.

436

Comparative Study on Physicochemical Properties and Combustion Behaviors of Diesel Particulates and Model Soot  

Science Journals Connector (OSTI)

In the IR spectra of real diesel particulates, the absorption peaks at around 2928 and 3048 cm?1 are corresponding to the C?H vibration of the aromatic cycle, the peak at around 764 cm?1 is due to the vibration of substituted aromatic carbon, and the absorption peaks at around 1600 and 1724 cm?1 are assigned to the ?C?O? vibration. ... In general, it can be concluded that Printex U is a suitable model soot for the study on the combustion performances of the soot fraction of diesel particulates. ...

Jian Liu; Zhen Zhao; Chunming Xu; Aijun Duan; Guiyuan Jiang

2010-01-14T23:59:59.000Z

437

Fine, New York: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Fine, New York: Energy Resources Fine, New York: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 44.2478396°, -75.1377015° 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":44.2478396,"lon":-75.1377015,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

438

Development of an Advanced Fine Coal Suspension Dewatering Process  

SciTech Connect

With the advancement in fine coal cleaning technology, recovery of fine coal (minus 28 mesh) has become an attractive route for the U.S. coal industry. The clean coal recovered using the advanced flotation technology i.e. column flotation, contains on average 20% solids and 80% water, with an average particle size of 35 microns. Fine coal slurry is usually dewatered using a vacuum dewatering technique, providing a material with about 25 to 30 percent moisture. The process developed in this project will improve dewatering of fine (0.6mm) coal slurry to less than 20 percent moisture. Thus, thermal drying of dewatered wet coal will be eliminated. This will provide significant energy savings for the coal industry along with some environmental benefits. A 1% increase in recovery of coal and producing a filter cake material of less than 20 % moisture will amount to energy savings of 1900 trillion Btu/yr/unit. In terms of the amount of coal it will be about 0.8% of the total coal being used in the USA for electric power generation. It is difficult to dewater the fine clean coal slurry to about 20% moisture level using the conventional dewatering techniques. The finer the particle, the larger the surface area and thus, it retains large amounts of moisture on the surface. The coal industry has shown some reluctance in using the advanced coal recovery techniques, because of unavailability of an economical dewatering technique which can provide a product containing less than 20% moisture. The U.S.DOE and Industry has identified the dewatering of coal fines as a high priority problem. The goal of the proposed program is to develop and evaluate a novel two stage dewatering process developed at the University of Kentucky, which involves utilization of two forces, namely, vacuum and pressure for dewatering of fine coal slurries. It has been observed that a fine coal filter cake formed under vacuum has a porous structure with water trapped in the capillaries. When this porous cake is subjected to pressure for a short time, the free water present is released from the filter cake. Laboratory studies have shown that depending on the coal type a filter cake containing about 15% moisture could be obtained using the two-stage filtration technique. It was also noted that applying intermittent breaks in vacuum force during cake formation, which disturbed the cake structure, helped in removing moisture from the filter cakes. In this project a novel approach of cleaning coal using column flotation was also developed. With this approach the feed capacity of the column is increased significantly, and the column was also able to recover coarser size coal which usually gets lost in the process. The outcome of the research benefits the coal industry, utility industry, and indirectly the general public. The benefits can be counted in terms of clean energy, cleaner environment, and lower cost power.

B. K. Parekh; D. P. Patil

2008-04-30T23:59:59.000Z

439

The Speed of Light and the Fine Structure Constant  

E-Print Network (OSTI)

The fine structure constant $\\alpha $ includes the speed of light as given by $\\alpha =\\frac{e^{2}}{4\\pi \\epsilon_{0}c\\hbar}$. It is shown here that, following a $TH\\epsilon \\mu $ formalism, interpreting the permittivity $\\epsilon_{0}$ and permeabiliy $\\mu_{0}$ of free space under Lorentz local and position invariance, this is not the case. The result is a new expression as $\\alpha =\\frac{e^{2}}{4\\pi \\hbar}$ in a new system of units for the charge that preserves local and position invariance. Hence, the speed of light does not explicitly enter in the constitution of the fine structure constant. The new expressions for the Maxwell's equations are derived and some cosmological implications discussed.

Antonio Alfonso-Faus

2000-08-04T23:59:59.000Z

440

Dissolved and particulate aluminum in the Columbia River and coastal waters of Oregon and Washington: behavior in near-field and far-field plumes  

E-Print Network (OSTI)

1 Dissolved and particulate aluminum in the Columbia River and coastal waters of Oregon) and particulate (leachable and total) aluminum was examined in the Columbia River and estuary, in near Influence on Shelf Ecosystems (RISE) cruise of May/June 2006. Dissolved and particulate aluminum (Al

Hickey, Barbara

Note: This page contains sample records for the topic "fine particulate matter" 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

Dual Fuel Diesel Engine Operation Using H2. Effect on Particulate Emissions  

Science Journals Connector (OSTI)

Dual Fuel Diesel Engine Operation Using H2. ... School of Engineering, Mechanical and Manufacturing Engineering, The University of Birmingham, Birmingham B15 2TT, United Kingdom, Universidad de Castilla?La Mancha, Edificio Politecnico, Escuela Tecnica Superior de Ingenieros Industriales, Avda. ... In diesel engines, the reduction of particulate emissions must be achieved in conjunction with the reduction of NOx emissions. ...

A. Tsolakis; J. J. Hernandez; A. Megaritis; M. Crampton

2005-01-11T23:59:59.000Z

442

Next Generation Non-particulate Dry Nonwoven Pad for Chemical Warfare Agent Decontamination  

SciTech Connect

New, non-particulate decontamination materials promise to reduce both military and civilian casualties by enabling individuals to decontaminate themselves and their equipment within minutes of exposure to chemical warfare agents or other toxic materials. One of the most promising new materials has been developed using a needlepunching nonwoven process to construct a novel and non-particulate composite fabric of multiple layers, including an inner layer of activated carbon fabric, which is well-suited for the decontamination of both personnel and equipment. This paper describes the development of a composite nonwoven pad and compares efficacy test results for this pad with results from testing other decontamination systems. The efficacy of the dry nonwoven fabric pad was demonstrated specifically for decontamination of the chemical warfare blister agent bis(2-chloroethyl)sulfide (H or sulfur mustard). GC/MS results indicate that the composite fabric was capable of significantly reducing the vapor hazard from mustard liquid absorbed into the nonwoven dry fabric pad. The mustard adsorption efficiency of the nonwoven pad was significantly higher than particulate activated carbon (p=0.041) and was similar to the currently fielded US military M291 kit (p=0.952). The nonwoven pad has several advantages over other materials, especially its non-particulate, yet flexible, construction. This composite fabric was also shown to be chemically compatible with potential toxic and hazardous liquids, which span a range of hydrophilic and hydrophobic chemicals, including a concentrated acid, an organic solvent and a mild oxidant, bleach.

Ramkumar, S S; Love, A; Sata, U R; Koester, C J; Smith, W J; Keating, G A; Hobbs, L; Cox, S B; Lagna, W M; Kendall, R J

2008-05-01T23:59:59.000Z

443

Z .Marine Chemistry 67 1999 3342 Differences in seawater particulate organic carbon concentration  

E-Print Network (OSTI)

of the organic carbon retained by a glass-fiber filter against the volume filtered. The interceptZ .Marine Chemistry 67 1999 33­42 Differences in seawater particulate organic carbon concentration August 1998; accepted 11 May 1999 Abstract Z . Z . ZParticulate organic carbon POC data collected

444

Radionuclide concentrations in air particulate at Palermo (Italy) following Fukushima accident  

Science Journals Connector (OSTI)

......Ethernet environment. Data analysis was performed using...evaluation of the burnup of a reactor, but it is also capable...confirms with sufficient reliability the origin of the radioactive...particulate by multi-spectra analysis. (1990) Quaderni D...Spectrometric analysis of the filters highlights......

S. Rizzo; E. Tomarchio

2013-03-01T23:59:59.000Z

445

Direct Capillary Gas Chromatography of Filter-Borne Particulate Emissions from Diesel Engines  

Science Journals Connector (OSTI)

......core (13). The hydrocarbons, which typically...products of the diesel combustion process (49...from incomplete combustion of fuel. Techniques...particulate- bound hydrocarbons have most often...analysis in individual heat-sealed plastic...Chromatograms and associated data were obtained via......

R.D. Cuthbertson; P.R. Shore

1988-03-01T23:59:59.000Z

446

Deep-Sea Research II 50 (2003) 655674 Determining true particulate organic carbon: bottles, pumps  

E-Print Network (OSTI)

Deep-Sea Research II 50 (2003) 655­674 Determining true particulate organic carbon: bottles, pumps or by in situ filtration with pumps and analyzing the filters. The concentrations measured by these two methods-latitude waters. Here we report that the ratio of bottle POC to pump POC ranged between 20 and 200 in the Ross Sea

Hansell, Dennis

447

Conduction in Multiphase ParticulateFibrous Networks Simulations and Experiments on Li-ion Anodes  

E-Print Network (OSTI)

promising Li-ion battery technologies incorporate nanoarchitectured carbon networks, typically in the form electronically February 7, 2003. Several promising Li-ion battery technologies incorporate nanoarchitecturedConduction in Multiphase ParticulateĂ?Fibrous Networks Simulations and Experiments on Li-ion Anodes

Sastry, Ann Marie

448

Ecological Effects and In-situ Detection of Particulate Contaminants in Aqueous Environments  

E-Print Network (OSTI)

investigates crude oil toxicity as a particulate suspension, suitability of in-situ instrumentation to measure crude oil suspensions, and the applicability of using acoustic backscatter to measure suspended solids and sub-surface oil droplet suspension... and Discussion................................................................... 132 x CHAPTER Page Suspended solids characterization......................................... 132 Acoustic backscatter depth profiles...

Fuller, Christopher Byron

2012-07-16T23:59:59.000Z

449

Physics 250 -Measurements of the Fine Structure Constant Derek Kimball January 2000 1  

E-Print Network (OSTI)

Physics 250 - Measurements of the Fine Structure Constant Derek Kimball January 2000 1 #12;Physics 250 - Measurements of the Fine Structure Constant Derek Kimball January 2000 2 #12;Physics 250 - Measurements of the Fine Structure Constant Derek Kimball January 2000 3 #12;Physics 250 - Measurements

Budker, Dmitry

450

Estimate of fine sediment deposit dynamics on a gravel bar using photography analysis  

E-Print Network (OSTI)

Estimate of fine sediment deposit dynamics on a gravel bar using photography analysis B. CAMENEN1 , M. JODEAU2 , and M. JABALLAH3 Abstract Three different methods to analyse fine sediment deposits the ground. These methods were used to estimate the surface of fine sediment deposits before and after

Paris-Sud XI, Université de

451

Nuclear Matter and Nuclear Dynamics  

E-Print Network (OSTI)

Highlights on the recent research activity, carried out by the Italian Community involved in the "Nuclear Matter and Nuclear Dynamics" field, will be presented.

M Colonna

2009-02-26T23:59:59.000Z

452

Characteristics of fine particle growth events observed above a forested  

NLE Websites -- All DOE Office Websites (Extended Search)

Characteristics of fine particle growth events observed above a forested Characteristics of fine particle growth events observed above a forested ecosystem in the Sierra Nevada Mountains of California Title Characteristics of fine particle growth events observed above a forested ecosystem in the Sierra Nevada Mountains of California Publication Type Journal Article Year of Publication 2006 Authors Lunden, Melissa M., Douglas R. Black, Megan McKay, Kenneth L. Revzan, Allen H. Goldstein, and Nancy J. Brown Journal Aerosol Science and Technology Volume 40 Start Page 373 Issue 5 Pagination 373-388 Date Published 02/2006 ISSN 0278-6826 (Print), 1521-7388 (Online) Abstract Atmospheric aerosols from natural and anthropogenic processes have both primary and secondary origins, and can influence human health, visibility, and climate. One key process affecting atmospheric concentrations of aerosols is the formation of new particles and their subsequent growth to larger particle sizes. A field study was conducted at the Blodgett Forest Research Station in the Sierra Nevada Mountains of California from May through September of 2002 to examine the effect of biogenic volatile organic compounds on aerosol formation and processing. The study included in-situ measurements of concentration and biosphere-atmosphere flux of VOCs, ozone, aerosol size distribution, aerosol physical and optical properties, and meteorological variables. Fine particle growth events were observed on approximately 30 percent of the 107 days with complete size distribution data. Average particle growth rates measured during these events were 3.8 ± 1.9 nm hr-1. Correlations between aerosol properties, trace gas concentrations, and meteorological measurements were analyzed to determine conditions conducive to fine particle growth events. Growth events were typically observed on days with a lesser degree of anthropogenic influence, as indicated by lower concentrations of black carbon, carbon monoxide, and total aerosol volume. Days with growth events also had lower temperatures, increased wind speeds, and larger momentum flux. Measurements of ozone concentrations and ozone flux indicate that gas phase oxidation of biogenic volatile organic compounds occur in the canopy, strongly suggesting that a significant portion of the material responsible for the observed particle growth are oxidation products of naturally emitted very reactive organic compounds.

453

Stabilisation of biodried municipal solid waste fine fraction in landfill bioreactor  

Science Journals Connector (OSTI)

The biodrying process of solid waste is a pre-treatment for the bio-stabilisation of the municipal solid waste. This study aims to investigate the fate of the municipal solid waste fine fraction (MSWFF) resulting from a biodrying treatment when disposed in landfills that are operated as bioreactors. Biodried MSWFF was apparently stable due to its low moisture content that slows down the microbial activity. The lab-scale anaerobic bioreactors demonstrated that a proper moisture content leads to a complete biodegradation of the organic matter contained in the biodried MSWFF. Using a pilot-scale landfill bioreactor (LBR), MSWFF stabilisation was achieved, suggesting that the leachate recirculation could be an effective approach to accomplish the anaerobic biodegradation and biostabilisation of biodried MSWFF after landfilling. The biostabilisation of the material resulting from the LBR treatment was confirmed using anaerobic and aerobic stability indices. All anaerobic and aerobic indices showed a stability increase of approximately 80% of the MSWFF after treatment in the LBR. The similar values of OD7 and BMP stability indices well agree with the relationship between the aerobic and anaerobic indices reported in literature.

Selene Grilli; Andrea Giordano; Alessandro Spagni

2012-01-01T23:59:59.000Z

454

Secluded WIMP Dark Matter  

E-Print Network (OSTI)

We consider a generic mechanism via which thermal relic WIMP dark matter may be decoupled from the Standard Model, namely through a combination of WIMP annihilation to metastable mediators with subsequent delayed decay to Standard Model states. We illustrate this with explicit examples of WIMPs connected to the Standard Model by metastable bosons or fermions. In all models, provided the WIMP mass is greater than that of the mediator, it can be secluded from the Standard Model with an extremely small elastic scattering cross-section on nuclei and rate for direct collider production. In contrast, indirect signatures from WIMP annihilation are consistent with a weak scale cross-section and provide potentially observable \\gamma-ray signals. We also point out that \\gamma-ray constraints and flavor physics impose severe restrictions on MeV-scale variants of secluded models, and identify limited classes that pass all the observational constraints.

Maxim Pospelov; Adam Ritz; Mikhail B. Voloshin

2007-11-30T23:59:59.000Z

455

Field Theory of Matter  

Science Journals Connector (OSTI)

A speculative field theory of matter is developed. Simple computational methods are used in a preliminary survey of its consequences. The theory exploits the known properties of leptons by means of a principle of symmetry between electrical and nucleonic charge. There are fundamental fields with spins 0, ˝, 1. The spinless field is neutral. Spin ˝ and 1 fields can carry both electrical and nucleonic charge. The multiplicity of any nonzero charge is 3. Explicit dynamical mechanisms for the breakdown of unitary symmetry and for the muon-electron mass difference are given. A more general view of lepton properties is proposed. Mass relations for baryon and meson multiplets are derived, together with approximate couplings among the multiplets. The weakness of ? production in ?-N collisions and the suppression of the ???+? decay is explained.

Julian Schwinger

1964-08-10T23:59:59.000Z

456

Dark Matter Searches with GLAST  

E-Print Network (OSTI)

Indirect detection of particle dark matter relies upon pair annihilation of Weakly Interaction Massive Particles (WIMPs), which is complementary to the well known techniques of direct detection (WIMP-nucleus scattering) and collider production (WIMP pair production). Pair annihilation of WIMPs results in the production of gamma-rays, neutrinos, and anti-matter. Of the various experiments sensitive to indirect detection of dark matter, the Gamma-ray Large Area Space Telescope (GLAST) may play the most crucial role in the next few years. After launch in late 2007, The GLAST Large Area Telescope (LAT) will survey the gamma-ray sky in the energy range of 20MeV-300GeV. By eliminating charged particle background above 100 MeV, GLAST may be sensitive to as yet to be observed Milky Way dark matter subhalos, as well as WIMP pair annihilation spectral lines from the Milky Way halo. Discovery of gamma-ray signals from dark matter in the Milky Way would not only demonstrate the particle nature of dark matter; it would also open a new observational window on galactic dark matter substructure. Location of new dark matter sources by GLAST would dramatically alter the experimental landscape; ground based gamma ray telescopes could follow up on the new GLAST sources with precision measurements of the WIMP pair annihilation spectrum.

Lawrence Wai; GLAST LAT Collaboration

2007-01-31T23:59:59.000Z

457

dark matter dark energy inflation  

E-Print Network (OSTI)

theory dark matter dark energy inflation The National Science Foundation The Kavli Foundation NSF Site Review November 28-29, 2005 #12;dark matter dark energy inflation NSF Site Visit ­ November 28 - 29, 2005The National Science Foundation The Kavli Foundation The Theoretical Web UHE cosmic rays B

Hu, Wayne

458

Organic matter in ancient meteorites  

Science Journals Connector (OSTI)

......asteroids. 3: Organic matter in...lead to the production of hydroxy...useful in cell membranes...a part in cell membranes...meteorite organic matter because...form the solar system bequeathed...the early solar system and organic-inorganic......

Mark A Sephton

2004-04-01T23:59:59.000Z

459

Energy Matters in Washington State  

E-Print Network (OSTI)

Energy Matters in Washington State Energy Matters in Washington State www.energy.wsu.edu/library/ November 2009 #12;905 Plum Street SE, Building 3 P.O. Box 43169 Olympia, Washington 98504-3169 Energy University Extension Energy Program. 905 Plum Street SE, Building 3, P.O. Box 43169, Olympia, Washington

Collins, Gary S.

460

A Reconsideration of Matter Waves  

E-Print Network (OSTI)

Matter waves were discovered in the early 20th century from their wavelength, predicted by DeBroglie, Planck's constant divided by the particle's momentum, that is, lmw = h/mv. But, the failure to obtain a reasonable theory for the matter wave frequency resulted somewhat in loss of further interest. It was expected that the frequency of the matter wave should correspond to the particle kinetic energy, that is, fmw = 1/2mv^2/h but the resulting velocity of the matter of the particle, v = fmw x lmw, is that the matter wave moves at one half the speed of the particle, obviously absurd as the particle and its wave must move together. If relativistic mass is used (as it should in any case) the problem remains, the same mass appearing in numerator and denominator and canceling. It is no help to hypothesize that the total energy, not just the kinetic energy, yields the matter wave. That attributes a matter wave to a particle at rest. It also gives the resulting velocity as c^2/v, the wave racing ahead of its particle. A reinterpretation of Einstein's derivation of relativistic kinetic energy (which produced his famous E = mc^2) leads to a valid matter wave frequency and a new understanding of particle kinetics and of the atom's stable orbits.

Roger Ellman

2005-05-16T23:59:59.000Z

Note: This page contains sample records for the topic "fine particulate matter" 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

Energy Gap in Nuclear Matter  

Science Journals Connector (OSTI)

......research-article Articles Energy Gap in Nuclear Matter Takeshi Ishihara a...Research, Kokubunji, Tokyo An energy gap in nuclear matter is studied. The nucleon-nucleon...1966) pp. 1026-1042 Nuclear Force and Energy Gap in Finite Nuclei Hiroharu......

Takeshi Ishihara; Ryozo Tamagaki; Hajime Tanaka; Masaru Yasuno

1963-11-01T23:59:59.000Z

462

PSH-12-0131 - In the Matter of: Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1 - In the Matter of: Personnel Security Hearing 1 - In the Matter of: Personnel Security Hearing PSH-12-0131 - In the Matter of: Personnel Security Hearing On March 5, 2013, an OHA Hearing Officer issued a decision in which he determined that an individual's DOE access authorization should be restored. The Individual had a history of two alcohol-related arrests and an alcohol-related incident at work. A DOE Psychologist found that the individual habitually used alcohol to excess. The Hearing Officer found that the Individual these security concerns at the hearing by presenting evidence that he had more than fully complied with the DOE Psychologist's treatment recommendations and the compelling testimony of his treating counselor. Steven Fine - Hearing Officer PSH-12-0131.pdf More Documents & Publications

463

PSH-12-0045 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5 - In the Matter of Personnel Security Hearing 5 - In the Matter of Personnel Security Hearing PSH-12-0045 - In the Matter of Personnel Security Hearing On August 22, 2012, an OHA Hearing Officer issued a decision in which he determined that an Individual's DOE security clearance should be restored. The Individual had been caught viewing pornography on a DOE workplace computer. The Individual was examined by a DOE Consultant Psychologist who diagnosed the Individual with an Impulse-Control Disorder NOS. The Individual was, however, able to show that, as a result of therapy, his Impulse-Control Disorder is in remission with a low to low-moderate chance of relapse. For these reasons, the Hearing Officer concluded that the Individual had mitigated the security concerns at the hearing. Steven L. Fine - Hearing Officer

464

PSH-13-0083 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3 - In the Matter of Personnel Security Hearing 3 - In the Matter of Personnel Security Hearing PSH-13-0083 - In the Matter of Personnel Security Hearing On October 21, 2013, an OHA Hearing Officer issued a decision in which he determined that an individual's DOE access authorization should not be restored. The Record showed that the individual had a history of three alcohol-related arrests. A DOE Psychologist also diagnosed the individual with Alcohol-Abuse. The Hearing Officer found that the Individual had not shown that he was reformed or rehabilitated from his Alcohol-Abuse. Nor had the individual mitigated the security concerns raised by his criminal activity since that activity was symptomatic of his Alcohol Abuse. Steven Fine - Hearing Officer PSH-13-0083.pdf More Documents & Publications

465

PSH-12-0092 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2 - In the Matter of Personnel Security Hearing 2 - In the Matter of Personnel Security Hearing PSH-12-0092 - In the Matter of Personnel Security Hearing On September 24, 2012, an OHA Hearing Officer issued a decision in which he determined that an individual's DOE access authorization should not be restored. The Individual had a history of five arrests, two of which were alcohol-related. The Individual's pattern of criminal activity included a sex offense against a minor, for which he was incarcerated for a period of over one year. In addition, A DOE Psychologist diagnosed the individual with Alcohol Dependence. The Hearing Officer found that the Individual had not mitigated any of these security concerns at the hearing. Steven Fine - Hearing Officer PSH-12-0092.pdf More Documents & Publications

466

A comparison of fine particle and aerosol strong acidity at the interface zone (1540 m) and within (452 m) the planetary boundary layer of the Great Gulf and Presidential-Dry River Class I Wildernesses on the Presidential Range, New Hampshire USA  

Science Journals Connector (OSTI)

Mount Washington, NH in the White Mountain National Forest, is flanked to the north-northeast and south by two Class I Wilderness areas, the Great Gulf and Presidential Range-Dry River Wildernesses, respectively. The Clean Air Act protects Class I Area natural resource values from air pollution. Aerosol sulfate, a fine particulate component that is often transported long distances, is a known contributor to visibility degradation and acidic deposition. We examined summertime fine particulate aerosol mass and sulfate, strong acidity and ammonium concentrations from 1988 to 2007 on Mount Washington at two elevations, 452 and 1540 m (msl). The former site is often within, and the latter at the interface of, the planetary boundary layer. Comparisons of sampling interval durations (10 and 24 h) and site vs. site are made. We also examine the extent to which aerosol sulfate is neutralized. Ten hour (daytime) compared to 24 h samples have higher mass and aerosol sulfate concentrations, however paired samples are well correlated. Fine mass concentrations compared between the 452 m and 1540 m sites (standard temperature and pressure corrected) show a weak positive linear relationship with the later being approximately 32% lower. We attribute the lack of a strong correlation to the facts that the 1540 m site is commonly at the interface of and even above the regional planetary boundary layer in summer and that it can intercept different air masses relative to the 452 m site. Sulfate is ?18% lower at the higher elevation site, but comprises a greater percentage of total fine mass; 42% compared to 37% for the high and low elevation site, respectively. Aerosol strong acidity was found to increase with increasing sulfate concentrations at both sites. Further the ratio of hydrogen to sulfate ion was greater in 24 h than 10 h samples at the higher elevation site likely due to overnight transport of fresh acidic aerosols.

Georgia L.D. Murray; Kenneth Kimball; L. Bruce Hill; George A. Allen; Jack M. Wolfson; Alex Pszenny; Thomas Seidel; Bruce G. Doddridge; Alexandra Boris

2009-01-01T23:59:59.000Z

467

Process for preparing fine grain titanium carbide powder  

DOE Patents (OSTI)

A method for preparing finely divided titanium carbide powder in which an organotitanate is reacted with a carbon precursor polymer to provide an admixture of the titanium and the polymer at a molecular-level due to a crosslinking reaction between the organotitanate and the polymer. The resulting gel is dried, pyrolyzed to drive off volatile components and provide carbon. The resulting solids are then heated at an elevated temperature to convert the titanium and carbon to high-purity titanium carbide powder in a submicron size range.

Janey, Mark A. (Concord, TN)

1986-01-01T23:59:59.000Z

468

Fine structure transitions of C+ in collisions with H2  

E-Print Network (OSTI)

Hr' If s specifies the orientation of the internuclear axis with respect to axes fixed in space, the eigenfunc­ tions YJ m (8) of Hr satisfy the equation b Jb (2) YlbmJb is a spherical harmonic. The Hamiltonian of the carbon ion C+ can be written... dissociate asymp­ totically to a product of the states C+(2P) and Hz(X1:E;). For perpendicular approach, the symmetry is CZv and there are three adiabatic molecular states, zA 1 , zBl> and zB2 • Simultaneous excitation of fine-structure and molecu­ lar...

Chu, Shih-I; Dalgarno, A.

1975-01-01T23:59:59.000Z

469

Dark energy, dark matter and fermion families in the two measures theory  

E-Print Network (OSTI)

A field theory is proposed where the regular fermionic matter and the dark fermionic matter are different states of the same "primordial" fermion fields. In regime of the fermion densities typical for normal particle physics, each of the primordial fermions splits into three generations identified with regular fermions. In a simple model, this fermion families birth effect is accompanied with the right lepton numbers conservation laws. It is possible to fit the muon to electron mass ratio without fine tuning of the Yukawa coupling constants. When fermion energy density becomes comparable with dark energy density, the theory allows new type of states - Cosmo-Low Energy Physics (CLEP) states. Neutrinos in CLEP state can be both a good candidate for dark matter and responsible for a new type of dark energy. In the latter case the total energy density of the universe is less than it would be in the universe free of fermionic matter at all. The (quintessence) scalar field is coupled to dark matter but its coupling to regular fermionic matter appears to be extremely suppressed.

E. I. Guendelman; A. B. Kaganovich

2004-08-10T23:59:59.000Z

470

Robocasting of Ceramics and Composites Using Fine Particle Suspensions  

SciTech Connect

Solid freeform fabrication is the near-net-shape manufacturing of components by sequentially stacking thin layers of material until complicated three dimensional shapes are produced. The operation is computer controlled and requires no molds. This exciting new field of technology provides engineers with the ability to rapidly produce prototype parts directly from CAD drawings and oftentimes little or no machining is necessary after fabrication. Techniques for freeform fabrication with several types of plastics and metals are already quite advanced and maybe reviewed in references 1 and 2. Very complicated plastic models can be fabricated by stereolithography, selective laser sintering, fused deposition modeling, or three-dimensional ink jet printing. Metals may be freeformed by the LENS{trademark} technique and porous ceramic bodies by three dimensional printing into a porous powder bed. However, methods for freeform fabrication that utilize particulate slurries to build dense ceramics and composites are not as well developed. The techniques that are being developed for the freeform fabrication of dense structural ceramics primarily revolve around the sequential layering of ceramic loaded polymers or waxes. Laminated Object Manufacturing and CAM-LEM processing use controlled stacking and laser cutting of ceramic tapes [2,3]. Similar to fused deposition modeling, ceramic loaded polymer/wax filaments are being used for the fused deposition of ceramics [2,4]. Extrusion freeform fabrication uses high pressure extrusion to deposit layers of ceramic loaded polymer/wax systems[1]. Modified stereolithographic techniques are also being developed using ceramic loaded ultraviolet curable resins [2]. Pre-sintered parts made with any of these techniques typically have 40-55 vol.% polymeric binder. In this regard, these techniques are analogous to powder injection molding of ceramics. Very long and complicated burnout heat treatments are necessary to produce a dense ceramic, free of organics. Heating rates of 0.2 degrees Celsius per minute are common. [5] Thus, while a part maybe rapidly prototype within a few hours, it takes several days to densify. In contrast, robocasting is a freeform fabrication technique developed at Sandia National Labs that utilizes particulate slurries but does not require organic binders. Since binder burnout is not an issue, a dense ceramic part maybe freeformed, dried, and sintered in less than 24 hours. In some regards, robocasting is analogous to the ceramic near-net-shape processing techniques, slip casting and gel casting [6]; however, robocasting is moldless and fabrication times can be quicker.

CESARANO III,JOSEPH

1999-10-28T23:59:59.000Z

471

Solar Radio Bursts with Spectral Fine Structures in Preflares  

E-Print Network (OSTI)

A good observation of preflare activities is important for us to understand the origin and triggering mechanism of solar flares, and to predict the occurrence of solar flares. This work presents the characteristics of microwave spectral fine structures as preflare activities of four solar flares observed by Ond\\v{r}ejov radio spectrograph in the frequency range of 0.8--2.0 GHz. We found that these microwave bursts which occurred 1--4 minutes before the onset of flares have spectral fine structures with relatively weak intensities and very short timescales. They include microwave quasi-periodic pulsations (QPP) with very short period of 0.1-0.3 s and dot bursts with millisecond timescales and narrow frequency bandwidths. Accompanying these microwave bursts, there are filament motions, plasma ejection or loop brightening on the EUV imaging observations and non-thermal hard X-ray emission enhancements observed by RHESSI. These facts may reveal certain independent non-thermal energy releasing processes and partic...

Zhang, Yin; Karlický, Marian; Mészárosová, Hana; Huang, Jing; Tan, Chengming; Simőes, Paulo

2014-01-01T23:59:59.000Z

472

Hydrogen Atom and Time Variation of Fine-Structure Constant  

E-Print Network (OSTI)

In this paper, we have solved the de Sitter special relativistic ($\\mathcal{SR}_{cR}$-) Dirac equation of hydrogen in the earth-QSO(quasar) framework reference by means of the adiabatic approach. The aspects of geometry effects of de Sitter space-time described by Beltrami metric are explored and taken into account. It is found that the $\\mathcal{SR}_{cR}$-Dirac equation of hydrogen is a time dependent quantum Hamiltonian system. We provide an explicit calculation to justify the adiabatic approach in dealing with this time-dependent system. Since the radius of de Sitter sphere $R$ is cosmologically large, the evolution of the system is very slow so that the adiabatic approximation legitimately works with high accuracy. We conclude that the electromagnetic fine-structure constant, the electron mass and the Planck constant are time variations. This prediction of fine-structure constant is consistent with the presently available observation data. For confirming it further, experiments/observations are required.

Mu-Lin Yan

2009-11-21T23:59:59.000Z

473

Fine structure changing collisions between ultra-cold lithium atoms  

SciTech Connect

The authors have designed and assembled an experiment to determine the rate of fine structure changing collisions between ultra-cold ({approximately} 1 mK) laser cooled Li atoms. The atoms are confined by a magneto-optical trap which consists of six polarized orthogonal laser beams tuned slightly below the 2S{sub 1/2}-2P{sub 3/2} resonance frequency of lithium. Measurements show that about 2 x 10{sup 7} atoms are confined to a roughly spherical region of about 1 mm in diameter. Fine structure changing collisions occur when an atom in the 2S{sub 1/2} state and an atom in the 2P{sub 3/2} state collide, and yield an atom in the 2S{sub 1/2} state and an atom in the 2P{sub 1/2} state, with an energy release corresponding to about 10 GHz. This energy adds kinetic energy to the atoms in the trap, and knocks atoms out of the trap. The authors have devised a method to measure the rate of this collisional loss mechanism. The method uses a laser diode and a dye laser to selectively photo-ionize the 2P{sub 1/2} atoms, and a channeltron particle multipiler measures the rate of ion formation. We will report the progress of this experiment.

Anderson, B.P.; Ritchie, N.W.M.; Xiao, Y.Y. [and others

1992-12-01T23:59:59.000Z

474

Coal surface control for advanced physical fine coal cleaning technologies  

SciTech Connect

This final report presents the research work carried out on the Coal Surface Control for Advanced Physical Fine Coal Cleaning Technologies project, sponsored by the US Department of Energy, Pittsburgh Energy Technology Center (DOE/PETC). The project was to support the engineering development of the selective agglomeration technology in order to reduce the sulfur content of US coals for controlling SO[sub 2] emissions (i.e., acid rain precursors). The overall effort was a part of the DOE/PETCs Acid Rain Control Initiative (ARCI). The overall objective of the project is to develop techniques for coal surface control prior to the advanced physical fine coal cleaning process of selective agglomeration in order to achieve 85% pyrite sulfur rejection at an energy recovery greater than 85% based on run-of-mine coal. The surface control is meant to encompass surface modification during grinding and laboratory beneficiation testing. The project includes the following tasks: Project planning; methods for analysis of samples; development of standard beneficiation test; grinding studies; modification of particle surface; and exploratory R D and support. The coal samples used in this project include three base coals, Upper Freeport - Indiana County, PA, Pittsburgh NO. 8 - Belmont County, OH, and Illinois No. 6 - Randolph County, IL, and three additional coals, Upper Freeport - Grant County- WV, Kentucky No. 9 Hopkins County, KY, and Wyodak - Campbell County, WY. A total of 149 drums of coal were received.

Morsi, B.I.; Chiang, S.H.; Sharkey, A.; Blachere, J.; Klinzing, G.; Araujo, G.; Cheng, Y.S.; Gray, R.; Streeter, R.; Bi, H.; Campbell, P.; Chiarlli, P.; Ciocco, M.; Hittle, L.; Kim, S.; Kim, Y.; Perez, L.; Venkatadri, R.

1992-01-01T23:59:59.000Z

475

Using Factor Analysis to Attribute Health Impacts to Particulate Pollution Sources1  

NLE Websites -- All DOE Office Websites (Extended Search)

Factor Analysis to Attribute Health Impacts to Particulate Factor Analysis to Attribute Health Impacts to Particulate Pollution Sources 1 Thomas Grahame U. S. Department of Energy Washington, DC George Hidy Envair/Aerochem Placitas, NM ABSTRACT Laden et al. (2000) recently reported results of applying factor analysis to data taken in six cities from1979 to1988, identifying airborne particle sources potentially affecting daily mortality. These authors sought relationships between source groups and risk measures using source tracer elements, Se (coal combustion), Pb (light duty motor vehicle sources), and Si (crustal--soil dispersion). Combined data analyses of this kind may overlook the complexity of source contributions, which have common tracer elements. In one of the cities, Boston for example, the authors found coal combustion

476

Particulate immersed boundary method for complex fluid-particle interaction problems with heat transfer  

E-Print Network (OSTI)

In our recent work [H. Zhang, F.X. Trias, A. Oliva, D. Yang, Y. Tan, Y. Sheng. PIBM: Particulate immersed boundary method for fluid-particle interaction problems. Powder Technology. 272(2015), 1-13.], a particulate immersed boundary method (PIBM) for simulating fluid-particle multiphase flow was proposed and assessed in both two- and three-dimensional applications. In this study, the PIBM was extended to solve thermal interaction problems between spherical particles and fluid. The Lattice Boltzmann Method (LBM) was adopted to solve the fluid flow and temperature fields, the PIBM was responsible for the non-slip velocity and temperature boundary conditions at the particle surface, and the kinematics and trajectory of the solid particles were evaluated by the Discrete Element Method (DEM). Four case studies were implemented to demonstrate the capability of the current coupling scheme. Firstly, numerical simulation of natural convection in a two-dimensional square cavity with an isothermal concentric annulus was...

Zhang, Hao; Trias, F Xavier; Yu, Aibing; Tan, Yuanqiang; Oliva, Assensi

2015-01-01T23:59:59.000Z

477

Apparatus and method for removing particulate deposits from high temperature filters  

DOE Patents (OSTI)

A combustion of a fuel-air mixture is used to provide a high-temperature and high-pressure pulse of gaseous combustion products for the back-flush cleaning of ceramic filter elements contained in a barrier filter system and utilized to separate particulates from particulate-laden process gases at high temperature and high pressure. The volume of gaseous combustion products provided by the combustion of the fuel-air mixture is preferably divided into a plurality of streams each passing through a sonic orifice and conveyed to the open end of each filter element as a high pressure pulse which passes through the filter elements and dislodges dust cake supported on a surface of the filter element.

Nakaishi, Curtis V. (Morgantown, WV); Holcombe, Norman T. (McMurray, PA); Micheli, Paul L. (Morgantown, WV)

1992-01-01T23:59:59.000Z

478

Process for the conversion of carbonaceous feedstocks to particulate carbon and methanol  

DOE Patents (OSTI)

A process is described for the production of a pollutant-free particulate carbon (i.e., a substantially ash-, sulfur- and nitrogen-free carbon) from carbonaceous feedstocks. The basic process involves de-oxygenating one of the gas streams formed in a cyclic hydropyrolysis-methane pyrolysis process in order to improve conversion of the initial carbonaceous feedstock. De-oxygenation is effected by catalytically converting carbon monoxide, carbon dioxide, and hydrogen contained in one of the pyrolysis gas streams, preferably the latter, to a methanol co-product. There are thus produced two products whose use is known per se, viz., a substantially pollutant-free particulate carbon black and methanol. These products may be admixed in the form of a liquid slurry of carbon black in methanol. 3 figs.

Steinberg, M.; Grohse, E.W.

1995-06-27T23:59:59.000Z

479

Process for the conversion of carbonaceous feedstocks to particulate carbon and methanol  

DOE Patents (OSTI)

A process for the production of a pollutant-free particulate carbon (i.e., a substantially ash-, sulfur- and nitrogen-free carbon) from carbonaceous feedstocks. The basic process involves de-oxygenating one of the gas streams formed in a cyclic hydropyrolysis-methane pyrolysis process in order to improve conversion of the initial carbonaceous feedstock. De-oxygenation is effected by catalytically converting carbon monoxide, carbon dioxide, and hydrogen contained in one of the pyrolysis gas streams, preferably the latter, to a methanol co-product. There are thus produced two products whose use is known per se, viz., a substantially pollutant-free particulate carbon black and methanol. These products may be admixed in the form of a liquid slurry of carbon black in methanol.

Steinberg, Meyer (Melville, NY); Grohse, Edward W. (Port Jefferson, NY)

1995-01-01T23:59:59.000Z

480

Use of time- and chemically resolved particulate data to characterize the  

NLE Websites -- All DOE Office Websites (Extended Search)

Use of time- and chemically resolved particulate data to characterize the Use of time- and chemically resolved particulate data to characterize the infiltration of outdoor PM2.5 into a residence in the San Joaquin Valley Title Use of time- and chemically resolved particulate data to characterize the infiltration of outdoor PM2.5 into a residence in the San Joaquin Valley Publication Type Journal Article Year of Publication 2003 Authors Lunden, Melissa M., Tracy L. Thatcher, Susanne V. Hering, and Nancy J. Brown Journal Environmental Science and Technology Volume 37 Start Page Chapter Pagination 4724-4732 Date Published October 15, 2003 Abstract Recent studies associate particulate air pollution with adverse health effects. The indoor exposure to particles of outdoor origin is not well characterized, particularly for individual chemical species. In response to this, a field study in an unoccupied, single-story residence in Clovis, California was conducted. Real-time particle monitors were used both outdoors and indoors to quantity PM2.5 nitrate, sulfate, and carbon. The aggregate of the highly time-resolved sulfate data, as well as averages of these data, was fit using a time-averaged form of the infiltration equation, resulting in reasonable values for the penetration coefficient and deposition velocity. In contrast, individual values of the indoor/outdoor ratio can vary significantly from that predicted by the model for time scales ranging from a few minutes to several hours. Measured indoor ammonium nitrate levels were typically significantly lower than expected based solely on penetration and deposition losses. The additional reduction is due to the transformation of ammonium nitrate into ammonia and nitric acid gases indoors, which are subsequently lost by deposition and sorption to indoor surfaces. This result illustrates that exposure assessments based on total outdoor particle mass can obscure the actual causal relationships for indoor exposures

Note: This page contains sample records for the topic "fine particulate matter" 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

MiniCLEAN Dark Matter Experiment  

NLE Websites -- All DOE Office Websites (Extended Search)

MiniCLEAN MiniCLEAN Dark Matter Experiment Investigating the field of high energy physics through experiments that strengthen our fundamental understanding of matter, energy,...

482

In situ optical sensing of diesel exhaust particulates using a polychromatic  

Science Journals Connector (OSTI)

A novel optical probe for in situ monitoring of diesel exhaust particulates has been developed and is demonstrated. The probe uses a transmissive configuration to interrogate a particulate stream using polychromatic (white) light from an electroluminescent LED, the probe being mounted transversely to the exhaust flow in the tailpipe. Consequently the effects of scattering and absorption are measured on the transmission spectrum. The optical signal is relayed via an optical fibre bundle to a remote detection and data logging unit. Photodetector signals representing red, green and blue spectral information are monitored using detectors having overlapping spectral responsivities. Data collection is by red–green–blue (RGB) tristimulus detection and spectral analysis uses the hue–lightness–saturation (HLS) algorithms. It is shown that changes in spectral width may be used to represent particulate bursts (scattering) via the saturation parameter with a compensation algorithm being used to compensate for shifts in the operating point due to contamination of the optics. As polychromatic light is used it is demonstrated that variation in the mean particle size may be represented in terms of the ratios of polydisperse extinction for adjacent spectral bands. The potential advantages of chromatic sensing for signal processing in terms of reduced susceptibility to vapour content and optical contamination is demonstrated by comparison with an intensity based sensor.

R A Aspey; K J Brazier

2003-01-01T23:59:59.000Z

483

Development of a Criticality Evaluation Method Considering the Particulate Behavior of Nuclear Fuel  

SciTech Connect

In conventional criticality evaluations of nuclear powder systems, effects of particulate behavior were not considered. In other words, it is difficult to take into account the particle motion in the criticality evaluations. We have developed a novel criticality evaluation code to resolve this problem. The criticality evaluation code, coupling a discrete element method simulation code with a continuous-energy Monte Carlo transport code, makes it possible to study the effects of the particulate dynamics on criticality. This criticality evaluation code is applied to the mixed-oxide (MOX) fuel powder agitation process. The criticality evaluations are performed while mixing the MOX fuel powder and an additive powder in a stirred vessel to investigate the effects of the powder free surface deformation and the particulate mixture state on the effective multiplication factor. The evaluation results reveal that the effective multiplication factor decreases due to the powder boundary deformation while it increases as the mixture condition of MOX powder and Zn-St powder is close to homogeneous.

Sakai, Mikio; Yamamoto, Toshihiro; Murazaki, Minoru; Miyoshi, Yoshinori [Japan Atomic Energy Research Institute (Japan)

2005-02-15T23:59:59.000Z

484

Hot and Dense QCD Matter  

NLE Websites -- All DOE Office Websites (Extended Search)

QCD Matter QCD Matter A Community White Paper on the Future of Relativistic Heavy-Ion Physics in the US Unraveling the Mysteries of the Strongly Interacting Quark-Gluon-Plasma Executive Summary This document presents the response of the US relativistic heavy-ion community to the request for comments by the NSAC Subcommittee, chaired by Robert Tribble, that is tasked to recommend optimizations to the US Nuclear Science Program over the next five years. The study of the properties of hot and dense QCD matter is one of the four main areas of nuclear physics research described in the 2007 NSAC Long Range Plan. The US nuclear physics community plays a leading role in this research area and has been instrumental in its most important discovery made over the past decade, namely that hot and dense QCD matter acts as a strongly interacting system with unique and previously unexpected

485

Suprathermal viscosity of dense matter  

SciTech Connect

Motivated by the existence of unstable modes of compact stars that eventually grow large, we study the bulk viscosity of dense matter, taking into account non-linear effects arising in the large amplitude regime, where the deviation {mu}{sub {Delta}} of the chemical potentials from chemical equilibrium fulfills {mu}{sub {Delta}} > or approx. T. We find that this supra-thermal bulk viscosity can provide a potential mechanism for saturating unstable modes in compact stars since the viscosity is strongly enhanced. Our study confirms previous results on strange quark matter and shows that the suprathermal enhancement is even stronger in the case of hadronic matter. We also comment on the competition of different weak channels and the presence of suprathermal effects in various color superconducting phases of dense quark matter.

Alford, Mark; Mahmoodifar, Simin; Schwenzer, Kai [Department of Physics, Washington University in St. Louis, Missouri, 63130 (United States)

2010-12-22T23:59:59.000Z

486

Physical Protection of Classified Matter  

Directives, Delegations, and Requirements

The order establishes policy and objectives for physical protection of classified matter. This directive does not cancel another directive. Chg 1, 7-30-93. Canceled by 5632.1C.

1988-02-03T23:59:59.000Z

487

What's the matter at RHIC?  

E-Print Network (OSTI)

I present here a concise review of the experimental results obtained at the Relativistic Heavy Ion Collider (RHIC), which shed light on the hot and dense quark gluon matter produced at these high temperature and density conditions.

Raphael Granier de Cassagnac

2007-07-03T23:59:59.000Z

488

Shear viscosity of nuclear matter  

E-Print Network (OSTI)

In this talk I report my recent study on the shear viscosity of neutron-rich nuclear matter from a relaxation time approach. An isospin- and momentum-dependent interaction is used in the study. Effects of density, temperature, and isospin asymmetry of nuclear matter on its shear viscosity have been discussed. Similar to the symmetry energy, the symmetry shear viscosity is defined and its density and temperature dependence are studied.

Jun Xu

2013-02-01T23:59:59.000Z

489

Lorentz-violating dark matter  

E-Print Network (OSTI)

LORENTZ-VIOLATING DARK MATTER A Dissertation by ANTONIO R. MONDRAGON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY May 2007 Major Subject...: Physics LORENTZ-VIOLATING DARK MATTER A Dissertation by ANTONIO R. MONDRAGON Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair...

Mondragon, Antonio Richard

2009-05-15T23:59:59.000Z

490

Cosmology, Thermodynamics and Matter Creation  

E-Print Network (OSTI)

Several approaches to the matter creation problem in the context of cosmological models are summarily reviewed. A covariant formulation of the general relativistic imperfect simple fluid endowed with a process of matter creation is presented. By considering the standard big bang model, it is shown how the recent results of Prigogine et alii \\cite{1} can be recovered and, at the same time their limits of validity are explicited.

J. A. S. Lima; M. O. Calvao; I. Waga

2007-08-24T23:59:59.000Z

491

Fine tracking system for balloon-borne telescopes  

E-Print Network (OSTI)

We present the results of a study along with a first prototype of a high precision system (? 1 arcsec) for pointing and tracking light (near-infrared) telescopes on board stratospheric balloons. Such a system is essentially composed by a star sensor and by a star tracker, able to recognize the field and to adequately track the telescope, respectively. We present the software aimed at processing the star sensor image and the predictive algorithm that allows the fine tracking of the source at a sub-pixel level. The laboratory tests of the system are described and its performance is analyzed. We demonstrate how such a device, when used at the focal plane of enough large telescopes (2-4m, F/10), is capable to provide (sub-)arcsec diffraction limited images in the near infrared bands.

Ricci, M; Lorenzetti, D

2011-01-01T23:59:59.000Z

492

Interlaboratory comparison of advanced fine-coal beneficiation processes  

SciTech Connect

The Pittsburgh Energy Technology Center (PETC) recently completed three interlaboratory test programs involving 21 developers of advanced fine-coal-cleaning processes. The processes consisted of specific gravity separation (aqueous or heavy-liquid), electrostatic separation (dry), advanced froth flotation, selective agglomeration, and surface modification (gas). The participating organizations received representative samples of Illinois No. 6, Pittsburgh, and Upper Freeport bed coals. They ground them to a size appropriate for their particular process and then treated each coal. Their goal was to produce a clean coal with 2--3{percent} ash while recovering maximum energy. The products were returned to the PETC for analysis and performance evaluation. This paper will discuss the processes involved in the three test programs and present the results of the beneficiation tests. 4 refs., 4 figs., 3 tabs.

Jacobsen, P.S. (Burns and Roe Services Corp., Pittsburgh, PA (USA)); Killmeyer, R.P.; Hucko, R.E. (USDOE Pittsburgh Energy Technology Center, PA (USA))

1989-12-01T23:59:59.000Z

493

DEVELOPMENT OF A NOVEL FINE COAL CLEANING SYSTEM  

SciTech Connect

The goal of the proposed project was to develop a novel fine coal separator having the ability to clean 1 mm x 0 size coal in a single processing unit. The novel fine coal separator, named as EG(Enhanced Gravity) Float Cell, utilizes a centrifugal field to clean 1 mm x 250 micron size coal, whereas a flotation environment to clean minus 250 micron coal size fraction. Unlike a conventional enhanced gravity concentrator, which rotates to produce a centrifugal field requiring more energy, the EG Float Cell is fed with a tangential feed slurry to generate an enhanced gravity field without any rotating part. A prototype EG Float Cell unit having a maximum diameter of 60 cm (24 inch) was fabricated during the first-half of the project period followed by a series of exploratory tests to make suitable design modification. Test data indicated that there was a significant concentration of coarse heavy materials in the coarse tailings discharge of the EG Float Cell. The increase in weight (%) of 1 mm x 250 micron (16 x 60 mesh) size fraction from 48.9% in the feed to 72.2% in the coarse tailings discharge and the corresponding increase in the ash content from 56.9% to 87.0% is indicative of the effectiveness of the enhanced gravity section of the EG Float Cell. However, the performance of the flotation section needs to be improved. Some of the possible design modifications may include more effective air sparging system for the flotation section to produce finer bubbles and a better wash water distributor.

Manoj K. Mohanty

2005-06-01T23:59:59.000Z

494

Fine Structure of the Hydrogen Atom. Part I  

Science Journals Connector (OSTI)

The fine structure of the hydrogen atom is studied by a microwave method. A beam of atoms in the metastable 2S122 state is produced by bombarding atomic hydrogen. The metastable atoms are detected when they fall on a metal surface and eject electrons. If the metastable atoms are subjected to radiofrequency power of the proper frequency, they undergo transitions to the non-metastable states 2P122 and 2P322 and decay to the ground state 1S122 in which they are not detected. In this way it is determined that contrary to the predictions of the Dirac theory, the 2S122 state does not have the same energy as the 2P122 state, but lies higher by an amount corresponding to a frequency of about 1000 Mc/sec. Within the accuracy of the measurements, the separation of the 2P122 and 2P322 levels is in agreement with the Dirac theory. No differences in either level shift or doublet separation were observed between hydrogen and deuterium. These results were obtained with the first working apparatus. Much more accurate measurements will be reported in subsequent papers as well as a detailed comparison with the quantum electrodynamic explanation of the level shift by Bethe.Among the topics discussed in connection with this work are (1) spectroscopic observations of the H? line, (2) early attempts to use microwaves to study the hydrogen fine structure, (3) existence of metastable hydrogen atoms, their properties and methods for their production and detection, (4) estimates of yield and r-f power requirements, (5) Zeeman and hyperfine structure effects, (6) quenching of metastable hydrogen atoms by electric and motional electric fields, (7) production of a polarized beam of metastable hydrogen atoms.

Willis E. Lamb; Jr. and Robert C. Retherford

1950-08-15T23:59:59.000Z

495

Lignin as Both Fuel and Fusing Binder in Briquetted Anthracite Fines for Foundry Coke Substitute.  

E-Print Network (OSTI)

??Lignin that had been extracted from Kraft black liquor was investigated as a fusing binder in briquetted anthracite fines for a foundry coke substitute. Cupola… (more)

Lumadue, Matthew

2012-01-01T23:59:59.000Z

496

Development Of Reclamation Substrates For Alberta Oil Sands Using Mature Fine Tailings And Coke.  

E-Print Network (OSTI)

??Mature fine tailings and coke are waste products of the oil sands industry with potential for reclamation. A greenhouse study assessed whether substrates of various… (more)

Luna-Wolter, Gabriela L.

2012-01-01T23:59:59.000Z

497

Double-Disk Dark Matter  

Science Journals Connector (OSTI)

Abstract Based on observational tests of large scale structure and constraints on halo structure, dark matter is generally taken to be cold and essentially collisionless. On the other hand, given the large number of particles and forces in the visible world, a more complex dark sector could be a reasonable or even likely possibility. This hypothesis leads to testable consequences, perhaps portending the discovery of a rich hidden world neighboring our own. We consider a scenario that readily satisfies current bounds that we call Partially Interacting Dark Matter (PIDM). This scenario contains self-interacting dark matter, but it is not the dominant component. Even if PIDM contains only a fraction of the net dark matter density, comparable to the baryonic fraction, the subdominant component’s interactions can lead to interesting and potentially observable consequences. Our primary focus will be the special case of Double-Disk Dark Matter (DDDM), in which self-interactions allow the dark matter to lose enough energy to lead to dynamics similar to those in the baryonic sector. We explore a simple model in which DDDM can cool efficiently and form a disk within galaxies, and we evaluate some of the possible observational signatures. The most prominent signal of such a scenario could be an enhanced indirect detection signature with a distinctive spatial distribution. Even though subdominant, the enhanced density at the center of the galaxy and possibly throughout the plane of the galaxy (depending on precise alignment) can lead to large boost factors, and could even explain a signature as large as the 130 GeV Fermi line. Such scenarios also predict additional dark radiation degrees of freedom that could soon be detectable and would influence the interpretation of future data, such as that from Planck and from the Gaia satellite. We consider this to be the first step toward exploring a rich array of new possibilities for dark matter dynamics.

JiJi Fan; Andrey Katz; Lisa Randall; Matthew Reece

2013-01-01T23:59:59.000Z

498

Cryogenic Dark Matter Search (CDMS): The Hunt for Dark Matter  

SciTech Connect

Deciphering the nature of dark matter has great scientific importance. A leading hypothesis is that dark matter is made of Weakly Interactive Massive Particles (WIMPs), which may result from supersymmetry or additional spatial dimensions. The underground search for elastic scattering of WIMPs on suitable targets (the so-called 'direct detection') is currently led by the Cryogenic Dark Matter Search II (CDMS II) experiment. Its sensitivity is ten times better than any other experiment and we hope to obtain another factor ten in the coming two years. After a brief recall of our recent results, I will describe the complementarity between direct detection experiments, the LHC and the ILC and I will outline the role that SLAC could play in this SuperCDMS program.

Sadoulet, Bernard (UC Berkeley) [UC Berkeley

2006-03-06T23:59:59.000Z

499

Matter Non-conservation in the Universe and Dynamical Dark Energy  

E-Print Network (OSTI)

In an expanding universe the vacuum energy density \\rho_{\\Lambda} is expected to be a dynamical quantity. In quantum field theory in curved space-time \\rho_{\\Lambda} should exhibit a slow evolution, determined by the expansion rate of the universe H. Recent measurements on the time variation of the fine structure constant and of the proton-electron mass ratio suggest that basic quantities of the Standard Model, such as the QCD scale parameter \\Lambda_{QCD}, may not be conserved in the course of the cosmological evolution. The masses of the nucleons m_N and of the atomic nuclei would also be affected. Matter is not conserved in such a universe. These measurements can be interpreted as a leakage of matter into vacuum or vice versa. We point out that the amount of leakage necessary to explain the measured value of \\dot{m}_N/m_N could be of the same order of magnitude as the observationally allowed value of \\dot{\\rho}_{\\Lambda}/\\rho_{\\Lambda}, with a possible contribution from the dark matter particles. The dark energy in our universe could be the dynamical vacuum energy in interaction with ordinary baryonic matter as well as with dark matter.

Harald Fritzsch; Joan Sola

2012-08-30T23:59:59.000Z

500

Engine-External HC-Dosing for Regeneration of Diesel Particulate Filters for Heavy Duty and NRMM According to Annex XXVII StVZO  

Energy.gov (U.S. Department of Energy (DOE))

This presentation discusses how a diesel particulate filter can be integrated in the exhaust piping of a heavy-duty engine.