Sample records for fresh-mined anthracite gener

  1. Calendari CLUC a la UPF Dijous 15 de gener, 2015

    E-Print Network [OSTI]

    Calendari CLUC a la UPF Dijous 15 de gener, 2015: 8.30 a 10.00 h: Gramàtica i vocabulari i'hi poden presentar membres de la UPF, de qualsevol altra universitat catalana i també públic extern. Com inscriure't a la UPF? Termini d'inscripció: 1-12 de desembre, 2014 Forma d'inscripció: Cal enviar un

  2. Fine Anthracite Coal Washing Using Spirals

    SciTech Connect (OSTI)

    R.P. Killmeyer; P.H. Zandhuis; M.V. Ciocco; W. Weldon; T. West; D. Petrunak

    2001-05-31T23:59:59.000Z

    The spiral performed well in cleaning the coarse 8 x 16 mesh size fraction, as demonstrated by the Ep ranging from 0.091 to 0.177. This is in line with typical spiral performance. In addition, the presence of the coarser size fraction did not significantly affect spiral performance on the typical 16 x 100 mesh fraction, in which the Ep ranged from 0.144 to 0.250. Changes in solids concentration and flow rate did not show a clear correlation with spiral performance. However, for difficult-to-clean coals with high near-gravity material, such as this anthracite, a single-stage spiral cleaning such a wide size fraction may not be able to achieve the clean coal ash and yield specifications required. In the first place, while the performance of the spiral on the coarse 8 x 16 mesh fraction is good with regard to Ep, the cutpoints (SG50s) are high (1.87 to 1.92), which may result in a clean coal with a higher-than-desired ash content. And second, the combination of the spiral's higher overall cutpoint (1.80) with the high near-gravity anthracite results in significant misplaced material that increases the clean coal ash error. In a case such as this, one solution may be to reclean the clean coal and middlings from the first-stage spiral in a second stage spiral.

  3. Examen `Algebra lineal Enginyeria Quimica. Gener 2003 TEST Temps: 1 hora. Puntuacio: 10 punts.

    E-Print Network [OSTI]

    Casanellas, Marta

    Examen `Algebra lineal Enginyeria Qu´imica. Gener 2003 TEST Temps: 1 hora. Puntuaci´o: 10 punts. 1)]. (e) Cap de les anteriors. 6. Per quants R ´es compatible el seg¨uent sistema lineal? 2 -1 1 0 3 4 producte per escalar habituals, el conjunt de les aplica- cions lineals f : R3 R2 tals que Im f [(2, -1

  4. Influence of the degree of metamorphism and reduction of the anthracites of the Donbas on the properties of the products of their thermal treatment

    SciTech Connect (OSTI)

    Eremin, I.V.; Ivanov, V.P.; Maloletnev, A.S.; Danilova, R.A.

    1981-01-01T23:59:59.000Z

    In the reported experiments, the influence of high-temperature treatment on the structure and properties of anthracites of the Donbas of different degrees of metamorphism and reduction has been studied. It has been shown that on thermal treatment up to 1250/degree/C feebly metamorphosed anthracites achieve structural orderedness to a considerable degree and their use in the electrode industry is possible. The predominating influence of the degree of metamorphism of the initial anthracites on the physicochemical properties of the products of their thermal treatment, as compared with that of the degree of reduction, has been established. 5 refs.

  5. Courses: Physics (PHYS) Page 375Sonoma State University 2013-2014 Catalog pHyS 210B generAL pHySiCS (3)

    E-Print Network [OSTI]

    Ravikumar, B.

    Courses: Physics (PHYS) Page 375Sonoma State University 2013-2014 Catalog pHyS 210B generAL pHySiCS (3) Lecture, 3 hours. A basic course in physics for students majoring in Biology, Geology, electromagnetic waves, and optics. Registration by Mathematics majors requires Physics and Astronomy Department

  6. Hg and Se capture and fly ash carbons from combustion of complex pulverized feed blends mainly of anthracitic coal rank in Spanish power plants

    SciTech Connect (OSTI)

    I. Surez-Ruiz; J.C. Hower; G.A. Thomas [Instituto Nacional del Carbon (INCAR-CSIC), Oviedo (Spain)

    2007-01-15T23:59:59.000Z

    In this work, the petrology and chemistry of fly ashes produced in a Spanish power plant from the combustion of complex pulverized feed blends made up of anthracitic/meta-anthracitic coals, petroleum, and natural coke are investigated. It was found that the behavior of fly ash carbons derived from anthracitic coals follows relatively similar patterns to those established for the carbons from the combustion of bituminous coals. Fly ashes were sampled in eight hoppers from two electrostatic precipitator (ESP) rows. The characterization of the raw ashes and their five sieved fractions (from {gt}150 to {lt}25 {mu}m) showed that glassy material, quartz, oxides, and spinels in different proportions are the main inorganic components. As for the organic fraction, the dominant fly ash carbons are anisotropic carbons, mainly unburned carbons derived from anthracitic vitrinite. The concentration of Se and Hg increased in ashes of the second ESP row, this increase being related to the higher proportion of anisotropic unburned carbons, particularly those largely derived from anthracitic vitrinite in the cooler ashes of the ESP (second row) and also related to the decrease in the flue gas temperature. This suggests that the flue gas temperature plays a major role in the concentration of mercury for similar ratios of unburned carbons. It was also found that Hg is highly concentrated in the medium-coarser fractions of the fly ashes ({gt} 45 {mu}m), there being a positive relationship between the amount of these carbons, which are apparently little modified during the combustion process, in the medium-coarse fractions of the ashes and the Hg retention. According to the results obtained, further research on this type of fly ash could be highly productive. 28 refs., 10 figs., 8 tabs.

  7. Operation of the NRCh constriction of boilers in 300 MW energy units during combustion of anthracite dust

    SciTech Connect (OSTI)

    Kaminskii, V.P.; Mironov, S.N.

    1982-03-01T23:59:59.000Z

    Operation of the furnace constriction of boilers in 300 MW units during combustion of anthracite dust with liquid slag removal now requires special attention on the part of both operating personnel at thermal power plants and designers. The reason behind this is charring of the studs and carborundum mass on the roof portion of the constriction with subsequent exposure of the tubes; external high-temperature corrosion of the tubes on the roof portion and on the upper incline of the constriction with subsequent tapering of the tube walls to 1.5 mm and their breaking; the presence of corrosion-fatigue destruction of the tube walls in the upper incline of the constriction with formation of scale, transverse deep grooves and fissures on the front side of the tubes. Overall, at the present time the constriction is a point of failure that requires intensified control and greater repair costs to replace damaged sections of the heating surfaces. In conjunction with this, complex analysis of operation of the constriction has been carried out.

  8. Anthracite-Crested butte folio, Colorado 

    E-Print Network [OSTI]

    Cross, Whitman, 1854-1949.; Eldridge, George Homans, 1854-1905.; Emmons, Samuel Franklin, 1841-1911.

    1894-01-01T23:59:59.000Z

    intake relationship to offspring age for black-tailed deer, elk, and white-tailed deer. 61 20 Scalar adjustment to milk energy concentration throughout lactation. 62 21 Scalar adjustment to milk production due to the milk requirement ratio. Milk... and likelihood of return at recreational areas (Swanson et al. 1989, Hastings 1986). Income from hunting operations is a major source of compensatory income for traditional farmers and ranchers (Haney 1983, Hill 1994). While deer are obviously an important...

  9. Anthracite Power & Light | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources JumpAnaconda, Montana:Information

  10. power generAtion College of Rural and Community Development

    E-Print Network [OSTI]

    Hartman, Chris

    to Power Generation: Maintenance.......4 PGEN F104--Gas and Steam Turbines; Co-Generation and Combined

  11. THE 3R ANTHRACITE CLEAN COAL TECHNOLOGY Economical Conversion of Browncoal to Anthracite Type Clean

    E-Print Network [OSTI]

    Edward Someus

    pac i ties. The 3R An thra cite Clean Coal end prod uct and tech nol ogy may ad van ta geously be in

  12. anthracite coal gasification: Topics by E-print Network

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

    Technology Demonstrations (5050) Clear Skies Reduced Carbon Intensity Clean Coal First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23...

  13. abandoned anthracite mines: Topics by E-print Network

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

    Coal Combustion By-Products Engineering Websites Summary: subject headings: Remedial action; Acid mine water; Mines; Coals; Recycling; Maryland; Fly ashRemediation of...

  14. anthracite mines mines: Topics by E-print Network

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

    Mines Using Coal Combustion By-Products Engineering Websites Summary: subject headings: Remedial action; Acid mine water; Mines; Coals; Recycling; Maryland; Fly ashRemediation of...

  15. La agricultura de California es grande, diversa, compleja y dinmica. Gener cerca

    E-Print Network [OSTI]

    Schladow, S. Geoffrey

    , plagas invasivas y enfermedades, el valor de la investigación y desarrollo agrícolas, la política agrícola y el ambiente rural, entre otros. Los asuntos son con frecuencia de tipo global, pero nos

  16. s e c t i o n reinventing energy | white Paper www.generAtinginsights.com

    E-Print Network [OSTI]

    , self-critical industries in the world. Various organizations, such as the Institute of Nuclear Power of the nuclear Business maturity model (nBmm) The nuclear power industry is one of the most globally sharing Operators (INPO), the World Association of Nuclear Operators (WANO), the Nuclear Energy Institute (NEI

  17. THE 3R ANTHRACITE CLEAN COAL TECHNOLOGY Economical Conversion of Browncoal to Anthracite Type Clean Coal by Low Temperature Carbonization Pre-Treatment Process

    E-Print Network [OSTI]

    Edward Someus

    The pre ven tive pre-treat ment of low grade solid fu els is safer, faster, better, and less costly vs. the “end-of-the-pipe ” post treat ment so lu tions. The “3R ” (Re cy cle-Re duce-Re use) in te grated en vi ron-ment con trol tech nol ogy pro vides pre ven tive pre-treat ment of low grade solid fu els, such as brown coal and con tam i nated solid fu els to achieve high grade cleansed fu els with an thra cite and coke com-pa ra ble qual ity. The goal of the 3R tech nol ogy is to pro vide cost ef fi cient and en vi ron men tally sus-tain able so lu tions by pre ven tive pre-treat ment means for ex tended op er a tions of the solid fuel com-bus tion power plants with ca pac ity up to 300 MWe power ca pac i ties. The 3R An thra cite Clean Coal end prod uct and tech nol ogy may ad van ta geously be in te grated to the oxyfuel – oxy-fir ing, Fos ter Wheeler an thra cite arc-fired util ity type boiler and Heat Pipe Re former tech nol o gies in com bi na tion with CO2 cap ture and stor age pro grams. The 3R tech nol ogy is pat ented orig i nal so lu tion. Ad van tages. Feedstock flex i bil ity: ap pli ca tion of pre-treated multi fu els from wider fuel se lec tion and avail abil ity. Im proved burn ing ef fi ciency. Tech nol ogy flex i bil ity: ef fi cient and ad van ta geous inter-link to proven boiler tech nol o gies, such as oxyfuel and arc-fired boil ers. Near zero pol lut ants for haz ard ous-air-pol lut ants: pre ven tive sep a ra tion of halo gens and heavy met als into small vol ume streams prior uti li za tion of cleansed fu els. ?97 % or ganic sul phur re moval achieved by the 3R ther-

  18. NEWS FEATURE NATURE|Vol 436|21 July 2005 that the reactor will probably be able to gener-

    E-Print Network [OSTI]

    ). Throughout the 1970s, tokamak technology advanced rapidly, leading many to believe on the sidelines, watching helplessly as France and Japan fought over which of them would host the machine -- China, the European Union, Japan, South Korea, Russia and the United States -- could be in place

  19. s e c t i o n Building the new grid | white Paper www.generAtinginsights.com

    E-Print Network [OSTI]

    grid: it challenges for energy Distribution grid operators the e-energy moma project addresses of an increased demand for energy, while traditional energy generation resources are diminishing. Therefore, global policy makers have begun crafting roadmaps to increase energy efficiency and sustainable, "green

  20. s e c t i o n Building the new grid | white Paper www.generAtinginsights.com

    E-Print Network [OSTI]

    Smart grid means automation of the electric power grid, and automation often means computerization: In the event of a cyber security threat to the electric power system, what is at stake? The first risk is serious disruption to the electric grid, which the North American Electric Reliability Corporation (NERC

  1. Val'osz'in"us'egi feladatok Szerepelt a k"uvetkez"o feladat a gener'atorf"uggv'eny m'odszer seg'its'eg'*

    E-Print Network [OSTI]

    Major, Péter

    "ovetkez"o szita formul'at: Ha A1, . .,.An tetsz"oleges esem* *'enyek egy val'osz'in"us'egi mez"on, akkor'osz'in"us'egi mez"on, B1 = B1(A1 . .,.An), . .,.Bm = Bm (A1 . .,.An), ezen esem'enyek f

  2. Toronto Telegraph http://www.torontotelegraph.com 10:45 AM Thursday 06 June 2013 Toronto News Breaking Business News Breaking International News Breaking Financial Markets News Gener

    E-Print Network [OSTI]

    Fung, Benjamin C. M.

    to help fight child porn, catch cyber thieves | Toronto Researchers develop new search tool to help fight child porn, catch cyber... http://www.torontotelegraph.com/index.php/sid/215016007/scat/03cb86... 1 of 6 a comment... Post to Facebook 0 0 New Researchers develop new search tool to help fight child porn, catch

  3. 1 Entomol,,Gener. 1 15(2): 121-125 1 Stuttgart 1990-06 1 ISSN: 0171-8177 1 Courtship, Pheromone Titre and Determination

    E-Print Network [OSTI]

    and the wind generated by wing vibration have been shown to be the main factors attracting the Q to the cf

  4. China Energy Primer

    E-Print Network [OSTI]

    Ni, Chun Chun

    2010-01-01T23:59:59.000Z

    anthracite, and lignite and brown coal make up the remainingCoal Anthracite Lignite and Brown Coal Source: China Energyof Coal in 2006 Lignite and Brown Coal Anthracite Bituminous

  5. Isotope study on organic nitrogen of Westphalian anthracites from the Western Middle field of Pennsylvania (U.S.A.) and from the Bramsche

    E-Print Network [OSTI]

    that nitrogen is released by sedimentary organic matter during diagenesis and metamorphism. Improvements of our

  6. Reply: Davies et al. (2012), Hydraulic fractures: How far can they go? Richard J. Davies a,*, Gillian R. Foulger a

    E-Print Network [OSTI]

    Foulger, G. R.

    2012-01-01T23:59:59.000Z

    propagating stimulated hydraulic fractures, gener- ated by fracking operations for gas and oil exploitation

  7. Using Bitmap Indexing Technology for Combined Numerical and Text Queries

    E-Print Network [OSTI]

    Stockinger, Kurt; Cieslewicz, John; Wu, Kesheng; Rotem, Doron; Shoshani, Arie

    2006-01-01T23:59:59.000Z

    while a compression scheme for an inverted index gener- allyor a compression method for the in- verted index to compress

  8. Finding Diverse Solutions of High Quality to Binary Integer Programs

    E-Print Network [OSTI]

    2013-10-31T23:59:59.000Z

    exists given contemporary computational capabilities and industrial-strength solvers. ...... Supporting 3PL decisions in the automotive industry by gener-.

  9. proteinsSTRUCTURE O FUNCTION O BIOINFORMATICS Docking with PIPER and refinement

    E-Print Network [OSTI]

    Vajda, Sandor

    of near-native structures gener- ated. The interaction potential is also new, based on the DARS (Decoys

  10. China's Coal: Demand, Constraints, and Externalities

    E-Print Network [OSTI]

    Aden, Nathaniel

    2010-01-01T23:59:59.000Z

    anthracite, lignite and brown coal. While bituminous coal isproduction of lignite and brown coal, which also increasedtonnes. Whereas lignite and brown coal accounted for 4% of

  11. Quantification of black carbon in marine systems using the benzene polycarboxylic acid method: a mechanistic and yield study

    E-Print Network [OSTI]

    Ziolkowski, Lori A; Chamberlin, A.R.; Greaves, John; Druffel, Ellen R.M.

    2011-01-01T23:59:59.000Z

    GC/MS and NMR as 100% anthraquinone. Oxidation of anthracenehas been found to produce anthraquinone (Cho 1995).We hypothesize that the anthraquinone gener- ated was then

  12. Emerging Trends in Heart Valve Engineering: Part I. Solutions for Future

    E-Print Network [OSTI]

    2015-01-01T23:59:59.000Z

    Controlled cyclic stretch bioreactor for tissue-engineeredin vitro, often in a bioreactor applying exogenous chemicalconditioned in a bioreactor to gener- ate a mechanically

  13. EMBench: Generating Entity-Related Benchmark Data Ekaterini Ioannou1

    E-Print Network [OSTI]

    Velegrakis, Yannis

    are expected to support. EMBench is fully configurable and allows the dynamic (i.e., on-the-fly) gener- ation

  14. E-Print Network 3.0 - auxiliary feedwater isolation Sample Search...

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

    Systems Evaluation of Refuse as a Low Sulfur Fuel Summary: auxiliary equipment to district heating and power generation 9 . In considering steam gener ating power... of the...

  15. The impact of wind uncertainty on the strategic valuation of ...

    E-Print Network [OSTI]

    2015-01-14T23:59:59.000Z

    Abstract The intermittent nature of wind energy generation has introduced ... has the potential to alleviate the intermittency problem posed by wind gener-.

  16. ITP Mining: Energy and Environmental Profile of the U.S. Mining...

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

    1 Combustion Engineering, Combustion-Fossil Power, Chapter 2-7, 1991. Coal 2-1 Energy and Environmental Profile of the U.S. Mining Industry Anthracite - Hard and very...

  17. United States - U.S. Energy Information Administration (EIA)

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    of primary coal (includes anthracite, bituminous, lignite, and for Estonia, oil shale). 829.7000 , 823.7750 , 838.1120 , 782.0910 , 895.9208 , 883.6381 , 890.3147 ,...

  18. applying two-photon excitation: Topics by E-print Network

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

    of Kansas - KU ScholarWorks Summary: or gener- ate dangerous amounts of hydrogen gas in radioactive waste storage tanks.1 Radiolysis and photolysis experiments pro- vide a window...

  19. NOTES DEL SEMINARI MONOGRFIC SOBRE TREBALLS

    E-Print Network [OSTI]

    Travesa, Artur

    -UAB-UPC), celebrada a l'Esco- la Polit`ecnica Superior d'Enginyeria de Vilanova i la Geltr´u, del 28 de gener a l'1 de

  20. Distributed Energy Systems in California's Future: A Preliminary Report Volume 2

    E-Print Network [OSTI]

    Balderston, F.

    2010-01-01T23:59:59.000Z

    Slightly Less Desirable Solar Process Heat Solar Co-gener~LESS DESIRABLE Solar industrial process heat Solar totalOrga. 'lics) Backup for Solar Grid Process Heat Natural Gas

  1. Unharnessing the power of Schrijver's permanental inequality (The ...

    E-Print Network [OSTI]

    2011-06-16T23:59:59.000Z

    Jun 16, 2011 ... Zametki 29, 6: 931-938, 957, 1981, (in Russian). [13] L. Gurvits, A proof of hyperbolic van der Waerden conjecture : the right gener- alization is ...

  2. Using Interactive Evolutionary Computation (IEC) with Validated Surrogate Fitness Functions for Redistricting

    E-Print Network [OSTI]

    Kimbrough, Steven Orla

    Using Interactive Evolutionary Computation (IEC) with Validated Surrogate Fitness Functions Evolu- tionary Computation (IEC) is a natural approach here, if practicable. The paper proposes development of Validated Surrogate Fitness (VSF) functions as a workable and gener- alizable form of IEC

  3. on man, nature & air pollution

    E-Print Network [OSTI]

    Finlayson-Pitts, Barbara J

    2008-01-01T23:59:59.000Z

    activities, par- ticularly fossil-fuel combustion, are theThe combustion of fossil fuels gener- ates nitrogen oxides (those from incomplete fossil-fuel com- bustion, solvent use,

  4. Acquisition Costs and Nutritional Data on Great Basin Resources

    E-Print Network [OSTI]

    Simms, Steven R

    1985-01-01T23:59:59.000Z

    parching. Animals Handling-cost data for animals were gener-Presentation of search-cost data and examples are beyond theACQUISITION COST AND NUTRITIONAL DATA Minor, Rick, and Ruth

  5. The Seductive Allure of Neuroscience Explanations Deena Skolnick Weisberg, Frank C. Keil, Joshua Goodstein,

    E-Print Network [OSTI]

    Weisberg, Deena Skolnick

    The Seductive Allure of Neuroscience Explanations Deena Skolnick Weisberg, Frank C. Keil, Joshua to gener- ate more public interest when they contain neuroscientific information. Even irrelevant neuroscience information in an explanation of a psychological phenomenon may interfere with people's abilities

  6. A DERIVATIVE-FREE ALGORITHM FOR THE LEAST-SQUARE ...

    E-Print Network [OSTI]

    ship. Lemma 3.5. Under Assumptions 2.2 and 2.3, for any subsequence {xki } gener- ated by the DFLS algorithm ...... Notes in Eco. and Math. Systems 187, 1981.

  7. Formation and Evolution of Galaxy Bulges Proceedings IAU Symposium No. 245, 2007

    E-Print Network [OSTI]

    Bureau, Martin

    type functions, Gauss­Hermite polynomials, and the canonical exponential and sech type functions the results for the shape parameters of a Sersic type (), a gener- alized sech type (2/n), and a Gauss

  8. High-Speed Real-Time Digital Emulation for Hardware-in-the-Loop Testing of Power Electronics: A New Paradigm in the Field of

    E-Print Network [OSTI]

    Sanders, Seth

    , Novi Sad, Serbia. Abstract This paper details the design and application of a new ultra-high speed real wider proliferation of renewable energy gener- ation and realization of the smart grid vision. Power

  9. Potential for Coal-to-Liquids Conversion in the U.S.-Resource Base

    E-Print Network [OSTI]

    Patzek, Tadeusz W.

    Potential for Coal-to-Liquids Conversion in the U.S.-Resource Base Gregory D. Croft1 and Tad W the multi-Hubbert curve analysis to coal production in the United States, we demonstrate that anthracite production of this highest-rank coal. The pro- duction of bituminous coal from existing mines is about 80

  10. Vitrinite reflectance anisotropy as a tectonic fabric element

    SciTech Connect (OSTI)

    Hower, J.C. (Univ. of Kentucky, Lexington); Davis, A.

    1981-04-01T23:59:59.000Z

    The anisotropy of the coal maceral vitrinite was analyzed in relation to the tectonic setting of a coal from the Southern Anthracite Field in Pennsylvania. For the coal studied, the maximum-intermediate reflectance plane essentially paralleled the axial plane of the synclinorium (N66/sup 0/E strike, 64/sup 0/SE dip).

  11. Coal liquefaction process using pretreatment with a binary solvent mixture

    DOE Patents [OSTI]

    Miller, Robert N. (Allentown, PA)

    1986-01-01T23:59:59.000Z

    An improved process for thermal solvent refining or hydroliquefaction of non-anthracitic coal at elevated temperatures under hydrogen pressure in a hydrogen donor solvent comprises pretreating the coal with a binary mixture of an aromatic hydrocarbon and an aliphatic alcohol at a temperature below 300.degree. C. before the hydroliquefaction step. This treatment generally increases both conversion of coal and yields of oil.

  12. Carbon Vol. 28, Nos. 213. pp. 261-279, 1990 Printed in Great Britain.

    E-Print Network [OSTI]

    : carbon formation from catalyzed CO decomposition over iron and from liquid phase coking of hydrocarbons. preparation of carbons via catalytic cracking of CO and coking processes, 2. carbon active sites of concern. In par- ticular. we envisioned gasifying plentiful anthracite coal, with its attendant mineral matter

  13. Lamh Foisdineach An Uachtar Eleventh Night

    E-Print Network [OSTI]

    Oxford, University of

    , Men with metal arms, men with no face on. #12;Lamh Foisdineach An Uachtar Poem for Charlotte Slow of a heavy, ready ewe, and the anthracite mounds of heavy-lidded cows snorting in their hide. We're lulled, quarreling gulls trawl in the downpour, my feet crunch the brittle shingle on the ground. I have tried

  14. Catalysts for coal liquefaction processes

    DOE Patents [OSTI]

    Garg, D.

    1986-10-14T23:59:59.000Z

    Improved catalysts for catalytic solvent refining or hydroliquefaction of non-anthracitic coal at elevated temperatures under hydrogen pressure in a hydrogen donor solvent comprise a combination of zinc or copper, or a compound thereof, and a Group VI or non-ferrous Group VIII metal, or a compound thereof.

  15. Catalytic coal liquefaction process

    DOE Patents [OSTI]

    Garg, D.; Sunder, S.

    1986-12-02T23:59:59.000Z

    An improved process for catalytic solvent refining or hydroliquefaction of non-anthracitic coal at elevated temperatures under hydrogen pressure in a solvent comprises using as catalyst a mixture of a 1,2- or 1,4-quinone and an alkaline compound, selected from ammonium, alkali metal, and alkaline earth metal oxides, hydroxides or salts of weak acids. 1 fig.

  16. Reducing 68Ge Background in Dark Matter Experiments

    SciTech Connect (OSTI)

    Kouzes, Richard T.; Orrell, John L.

    2011-03-01T23:59:59.000Z

    Experimental searches for dark matter include experiments with sub-0.5 keV-energy threshold high purity germanium detectors. Experimental efforts, in partnership with the CoGeNT Collaboration operating at the Soudan Underground Laboratory, are focusing on energy threshold reduction via noise abatement, reduction of backgrounds from cosmic ray generated isotopes, and ubiquitous environmental radioactive sources. The most significant cosmic ray produced radionuclide is 68Ge. This paper evaluates reducing this background by freshly mining and processing germanium ore. The most probable outcome is a reduction of the background by a factor of two, and at most a factor of four. A very cost effective alternative is to obtain processed Ge as soon as possible and store it underground for 18 months.

  17. High-temperature high-pressure phases of lithium from electron force field (eFF) quantum

    E-Print Network [OSTI]

    Goddard III, William A.

    University), Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea; and b Materials and Process Simulation Center, California Institute of Technology, Pasadena, CA 91125 Contributed National Laboratory, Z-Pinch at Sandia National Laboratory) that gener- ate data about materials under

  18. The Minimum Constraint Removal Problem with Three Robotics Applications

    E-Print Network [OSTI]

    Indiana University

    The Minimum Constraint Removal Problem with Three Robotics Applications Kris Hauser September 13 strategies. It is demonstrated on three example applications: gener- ating human-interpretable excuses, then they provide no explanation for the failure. For several applications, it would be useful for planners

  19. Cosmic Ray Pitch Angle Scattering Through 90 o

    E-Print Network [OSTI]

    anisotropy and the amplitude of hydro­magnetic waves gener­ ated by this streaming instability is limited rise to the dominant form of wave dissipation). We also account for ion­cyclotron damping of small wave the quasi­linear scattering with the adiabatic mir­ roring in a small boundary layer in momentum space close

  20. INCREASED LEAD ABSORPTION AND LEAD POISONING

    E-Print Network [OSTI]

    INCREASED LEAD ABSORPTION AND LEAD POISONING IN YOUNG CHILDREN A STATDIE:"IT BY THE CEJde slnt:t! the Surgeon GenerJi's Statement. "~edicJI Aspects of Childhood Lead POisoning," was issued:ld absorption Jnd lead poisoning. Such JCtivities for children will continue to be necessary until sources

  1. An economic study of farm enterprises and enterprise combinations on part-time farms in Northeast Texas with reference to suitability for part-time farm operation

    E-Print Network [OSTI]

    Burton, Wayne E

    1960-01-01T23:59:59.000Z

    , classiftcacion in 1995 ChaC classified parC~Cime farmers as chose wich 50 co 1SO productive msn work units (days of labor) in chair farming oPeraCions, when combined with off-farm workou lee gener- el Cype of classificaCion ha? noC been enxirely discarded...

  2. [1] J. H. Ahrens. Paving the chessboard. Journal of Combinatorial Theory, Series A, 31:277--288, 1981.

    E-Print Network [OSTI]

    Merlini, Donatella

    . Petreschi. LEONARDO: a soft­ ware visualization system. Proceedings of the 1­st Workshop on Algorithm¨utzenberger methodology and solving for A; we get the following gener­ ating function: Hol(t; w) = wt 2 (2 + t + 2w 2 t 2

  3. Sun's Network File System (NFS) One of the first uses of distributed client/server computing was

    E-Print Network [OSTI]

    Sheridan, Jennifer

    34 Sun's Network File System (NFS) One of the first uses of distributed client/server computing of data across clients. Thus, if 1 #12;2 SUN'S NETWORK FILE SYSTEM (NFS) you access a file on one machine-DUSSEAU #12;SUN'S NETWORK FILE SYSTEM (NFS) 3 even; in the best such case, no network traffic need be gener

  4. Engineering Options for the U.S. Fusion Demo* M.S. Tillack1, M. Billone2, L. El-Guebaly3, D.K. Sze2, L. M. Waganer4, C. Wong5,

    E-Print Network [OSTI]

    Tillack, Mark

    power producer will choose to purchase one as its next electric gener- ating plant. A fusion power plant for an attractive tokamak fusion power core is not unlimited; previous studies have shown that advanced low with them. I. INTRODUCTION The Starlite project has assembled a set of requirements for commercial power

  5. 2006 IEEE International Conference on Systems, Man, and Cybernetics

    E-Print Network [OSTI]

    Ryu, Jee-Hwan

    energy with each other. The time-domain passivity controller has the landing force as input and controls studies in walking trajectory gener- ation [7],[8] and online (real-time) balance control [9],[10] during Engineering, Korea University of Technology and Education, Cheoan-city, 330-708, Republic of Korea j hryu

  6. Smart Energy Case Study Christof Baumann

    E-Print Network [OSTI]

    renewable energy produc- tion, the importance of involving energy-consumers into the process of scheduling consumption to match what is gener- ated from renewable energies like wind or solar needs a way to regulateSmart Energy Case Study Christof Baumann ETH Zurich, Switzerland christof@boumann.ch Stephan Holzer

  7. Toward a robust 2D spatio-temporal self-organization

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    connections in the brain saves energy; the neighborhood property is robust to noise and makes easier commu that gener- ates neighborhood in representation derives from a spatial distance, the choice of which is often on which stimuli are displayed is fully connected to a layer of neurons. TOM integrates time with inter

  8. Journal of Nuclear and Radiochemical Sciences, Vol. 6, No.1, pp. 17-20, 2005 2005 The Japan Society of Nuclear and Radiochemical Sciences

    E-Print Network [OSTI]

    Burke, Ian

    allied to the genera- tion of nuclear power. The inventory of radionuclides gener- ated during the last during uranium mining to the intensely radioactive plant, fuel and liquid wastes produced from reactor operation and fuel reprocessing. All wastes pose a potential threat to the environment and require (1

  9. FIRST-ORDER DEFINITIONS IN FUNCTION FIELDS OVER ANTI-MORDELLIC FIELDS

    E-Print Network [OSTI]

    Pop, Florian

    . A function #12;eld over k is a #12;nitely generated extension K of k with trdeg(Kjk) > 0. De#12;nition 1 AND FLORIAN POP Theorem 1.8. Let k be a 2-cohomologically well behaved #12;eld. Let Kjk be a #12;nitely gener

  10. THE GROWTH OF LIMITS OF VERTEX REPLACEMENT RULES

    E-Print Network [OSTI]

    Previte, Joseph P.

    THE GROWTH OF LIMITS OF VERTEX REPLACEMENT RULES JOSEPH PREVITE, MICHELLE PREVITE, AND MARY a vertex replacement rule given by exactly one replacement graph generates an infinite graph for the growth degree of infinite graphs with polynomial growth that are gener- ated by vertex replacement rules

  11. 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim722 wileyonlinelibrary.com

    E-Print Network [OSTI]

    Chen, Sow-Hsin

    of nanostructures lead to the conclusion that electrochemical reaction and mechanical degradation are material' effect. In oxide nanowires, discrete cracks in ZnO nanowires are gener- ated near the lithiation reaction front, leading to leapfrog cracking, while a mobile dislocation cloud at the reaction front is observed

  12. Atmos. Chem. Phys., 10, 20532061, 2010 www.atmos-chem-phys.net/10/2053/2010/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    requires large-scale deployment of low or zero greenhouse gas (GHG) emission technologies such as wind-powered gener- ators over vast areas of land or coastal ocean. Using wind turbines to meet 10% or more of global the impacts of wind turbines by simply increasing the ocean surface drag needs further study. Significant warm

  13. A Web Site Navigation Engine Mark Levene

    E-Print Network [OSTI]

    Levene, Mark

    A Web Site Navigation Engine Mark Levene Department of Computer Science Birkbeck College site-specific search engines is that they are not able to pick up the "scent of information" [5 is looking for. Moreover, Hearst [2] argues that next gener- ation site-specific search engines should

  14. Oceanography Vol.19, No. 4, Dec. 2006104 the Subduction

    E-Print Network [OSTI]

    Stern, Robert J.

    and Technology Center, Yokosuka, Japan. Robert J. Stern (rjstern@utdallas.edu) is Professor, Department, leading to gener- ation of chemically distinct arc magmas that differentiate, solidify, and produce Director, Geochemical Evolution, Institute for Frontier Research on Earth Evolution, Japan Marine Science

  15. ADVANCES IN GEOPHYSICS, VOL. 39 LOCAL TSUNAMIS AND EARTHQUAKE

    E-Print Network [OSTI]

    equations describe the evolution of tsunamis during run-up in such a way that the shoreline is fixed in (ADVANCES IN GEOPHYSICS, VOL. 39 LOCAL TSUNAMIS AND EARTHQUAKE SOURCE PARAMETERS ERIC L. GEIST u in estimating the severity of local tsunamis gener- ated by earthquakes is explaining the great event

  16. Signal Processing 81 (2001) 24032418 www.elsevier.com/locate/sigpro

    E-Print Network [OSTI]

    Cohen, Israel

    Signal Processing 81 (2001) 2403­2418 www.elsevier.com/locate/sigpro Speech enhancement for non controlled recursive averaging (MCRA) noise estimation approach for robust speech enhancement. The spectral. Introduction A practical speech enhancement system gener- ally consists of two major components: the estima

  17. 2005 Conference on Information Sciences and Systems, The Johns Hopkins University, March 1618, 2005 Maximizing the Lifetime of Sensor Network Using

    E-Print Network [OSTI]

    Islam, M. Saif

    Energy Yunxia Chen and Qing Zhao Department of Electrical and Computer Engineering University and the average wasted energy, we propose a new distributed transmission scheme which utilizes the local sensors, each powered by a battery with Ein initial energy. Without loss of gener- ality, we assume

  18. Changes in Selenium, Copper, Cadmium, and Zinc Concentrations in Mullet (Mugil cephalus) from the Southern Basin of Lake Macquarie, Australia, in

    E-Print Network [OSTI]

    Canberra, University of

    attributed to power gener- ation activities and the production of selenium-contaminated fly ash. Two coal not been established but are believed to be partly from the activities of the coal-fired power station the Southern Basin of Lake Macquarie, Australia, in Response to Alteration of Coal-Fired Power Station Fly Ash

  19. For permission to copy, contact editing@geosociety.org 2005 Geological Society of America 1033

    E-Print Network [OSTI]

    Ingólfsson, Ólafur

    -long Norwegian shelf from the North Sea (57°N) to Svalbard (80°N) has revealed a dynamic ice-flow pattern along the Norwegian Channel Ice Stream and Bear Island Trough Ice Stream, each 150­200 km wide at the mouth. The onset of MSGL and, hence, fast ice flow is gener- ally close to the outer coast, at the border zone

  20. GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 22, PAGES 2615-3618, NOVEMBER 15, 2000 Geodetic network optimization for geophysical parameters

    E-Print Network [OSTI]

    Tingley, Joseph V.

    GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 22, PAGES 2615-3618, NOVEMBER 15, 2000 3615 Geodetic network optimization for geophysical parameters Geoffrey Blewitt Nevada Bureau of Mines and Geology is gener- alized here, to seek the network configuration that optimizes the precision of geophysical

  1. Exploring the Effects of Lamarckian and Baldwinian Learning in Evolving Recurrent Neural Networks

    E-Print Network [OSTI]

    Mak, Man-Wai

    ­ winian learning mechanism''. discuss the results of the simulations. Finally, we conclude our findings1 Exploring the Effects of Lamarckian and Baldwinian Learning in Evolving Recurrent Neural Networks solution. In order to reduce the number of gener­ ations taken, the Lamarckian learning mechanism

  2. APPLIED AND ENVIRONMENTAL MICROBIOLOGY, June 2009, p. 36733678 Vol. 75, No. 11 0099-2240/09/$08.00 0 doi:10.1128/AEM.02600-08

    E-Print Network [OSTI]

    Geobacter sulfurreducens to gener- ate electricity in an MFC fed with cellulose. Analysis of the anode. Simultaneous Cellulose Degradation and Electricity Production by Enterobacter cloacae in a Microbial Fuel Cell/Accepted 25 March 2009 Electricity can be directly generated by bacteria in microbial fuel cells (MFCs

  3. EMILI GARCA-BERTHOU Departament de Cincies Ambientals and Institut d'Ecologia Aqutica, Universitat de Girona,

    E-Print Network [OSTI]

    García-Berthou, Emili

    , Centrarchidae, fish, Lake Banyoles, Spain Abstract The ecology of largemouth bass (Micropterus salmoides) is one of the fish assemblage. A review of the literature suggests that piscivory by largemouth bass might be gener-of-the-year (YOY) bass prey on zooplankton, typically shifting to insects as they grow and then to fish very early

  4. Online Submission ID: 236 Cable Route Planning in Complex Environments Using Constrained Sampling

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    algorithm precomputes a global roadmap of the environment by using a variant of the probabilistic roadmap configurations, we compute an approximate path using the initial roadmap gener- ated on the contact space. We shooting approach. The resulting global roadmap com- puted this way lies near the C

  5. Aharonov-Bohm effect in the non-Abelian quantum Hall fluid Lachezar S. Georgiev1 and Michael R. Geller2

    E-Print Network [OSTI]

    Geller, Michael R.

    N = z1 z2 ¯ zN 2 of charge-1 fermion fields :ei 2 : M, where is a u 1 boson15 and M a neutral Majorana anyon braiding for fault-tolerant quantum computation.20 Unfortunately, the braiding matrices gener

  6. hal-00193955,version1-5Dec2007 Submitted to the Annals of Statistics

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    (for instance univariate or multivari- ate GARCH, ARCH, ARMA-GARCH processes) the assumptions required; Asymptotic normality; Multidimensional causal processes; Multivariate GARCH processes 1 hal-00193955,version1 GARCH(q, q) de- fined by Engle and Kroner [13], see also Bollerslev [4]. Their natural gener- alization

  7. University of Illinois Department of Economics Econ 472 Fall 2001

    E-Print Network [OSTI]

    Chen, Yiling

    Perrelli Introduction to ARCH & GARCH models Recent developments in financial econometrics suggest the use) proposed a Gener- alized Autorregressive Conditional Heteroskedasticity (GARCH) model, 2 t = + (L)2 t-1) and GARCH processes: a GARCH (p, q) has a polynomial (L) of order "p" - the autorregressive term

  8. The application of clustering to Web search engine tech-nology is a novel approach that offers structure to the

    E-Print Network [OSTI]

    Jansen, James

    by the search. Similar to Vivisimo, Clusterizer technology gener- ates clusters in real time and uses a cluster environments is not well understood. This article reports on results from a transaction log analysis of Vivisimo.com, which is a Web meta-search engine that dynamically clusters users' search results

  9. Inside this edition Cyberinfrastructure and the Brave

    E-Print Network [OSTI]

    de Lijser, Peter

    phones, mp3 players, PDAs and other mobile devices as technology. Net Geners have never known a world are realizing that the pedagogies of the past are no longer appropriate for students of the present. Technology been hardwired by their technology- rich environments. If we as professors are to reach this generation

  10. Infrastructure Infrastructure for Research & Development

    E-Print Network [OSTI]

    automatischen 1.2-m-Teleskope STELLA-I und STELLA-II und das 80-cm-RoboTel, das Spec- tropolarimeter PEPSI sowie PEPSI, and the solar telescope GREGOR. Possible participation is considered in RAVE and 2nd Gener- ation Glasfasertechnik: Sortierhilfe Ummantelte Glasfaser zum Einsatz unter variabler mechanischer Belastung bei PEPSI

  11. 1674 IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 25, NO. 3, AUGUST 2010 Security-Constrained Generation and Transmission

    E-Print Network [OSTI]

    Fu, Yong

    -Constrained Generation and Transmission Outage Scheduling With Uncertainties Lei Wu, Member, IEEE, Mohammad Shahidehpour systems including forced outages of generation units and transmission lines, load forecast errors-and-cut method using CPLEX. The outcome of this study includes the hourly scheduling of outages of gener- ation

  12. MATH 101A: ALGEBRA I PART B: RINGS AND MODULES 35 9. Modules over a PID

    E-Print Network [OSTI]

    Igusa, Kiyoshi

    MATH 101A: ALGEBRA I PART B: RINGS AND MODULES 35 9. Modules over a PID This week we are proving the fundamental theorem for finitely gener- ated modules over a PID, namely that they are all direct sums in correct logical order. 9.1. torsion and torsion-free. Suppose that R is a PID and M is a finitely

  13. UnitWalk: A new SAT solver that uses local search guided by unit clause elimination

    E-Print Network [OSTI]

    Hirsch, Edward A.

    of a Boolean formula in conjunctive normal form (CNF )) is one of the most well-studied NP-complete problems good performance in practice both on randomly gener- ated instances and on structured instances formulas in conjunctive normal form. Despite its simplicity, this algorithm performs well on many common

  14. PEOPLE RESEARCH NEWS Faculty named Sloan fellows

    E-Print Network [OSTI]

    Entekhabi, Dara

    to solve global problems Researchers harness bacteria to produce energy, clean up environment In the search and yeast to make bread, wine and cheese, and more recently discovered antibiotics that help fight disease's unique abilities in order to help gener- ate energy and clean up Earth's atmosphere. MIT chemical

  15. Redox Shuttles DOI: 10.1002/anie.201002181

    E-Print Network [OSTI]

    (dicarbollide) Redox Shuttles in Dye-Sensitized Solar Cells** Alexander M. Spokoyny, Tina C. Li, Omar K. Farha, Charles* Dye-sensitized solar cells (DSCs) are potential next-gener- ation solar electricity sources since molecular dyes to increase light absorption,[3] evaluation of alternative semiconducting photoanodes

  16. Microwave Characterization of Josephson Junction Arrays: Implementing a Low Loss Superinductance

    E-Print Network [OSTI]

    Devoret, Michel H.

    the simplest case of a dissipationless LC oscillator, where the charge Q on the capacitor plates and the gener and capacitors, the characteristic impedance of the oscillator Z0 cannot exceed the vacuum impedance Zvac at DC, and extremely low dissipation. These attributes define the so-called ``super- inductance'' [4

  17. Characterization and Control of Biological Microrobots

    E-Print Network [OSTI]

    magnetic system is five orders-of-magnitude less than the propulsion force gener- ated by the flagellum proposed for propulsion: extracting energy from an ex- ternal magnetic field [4], or extracting energy from of Magnetotactic Bacterium (MTB) which can be considered as a biological microrobot. Magnetic dipole moment

  18. [The Journal of Geology, 2002, volume 110, p. 649669] 2002 by The University of Chicago. All rights reserved. 0022-1376/2002/11006-0002$15.00 Ireteba Pluton, Eldorado Mountains, Nevada: Late, Deep-Source,

    E-Print Network [OSTI]

    but with a less mature component as well: either Jurassic igneous rock, as suggested by sparse 150­170 Ma zircon Strongly peraluminous granitoid rocks are gener- ally interpreted to have been derived from mature the western margin of North Amer- ica. The importance of chemically mature sedi- mentary source material

  19. Minimalist Representations and the Importance of Nearest Neighbor Effects in Protein Folding Simulations

    E-Print Network [OSTI]

    Berry, R. Stephen

    Minimalist Representations and the Importance of Nearest Neighbor Effects in Protein Folding First principle models of protein folding gener- ally are preferred over statistical approaches because a knowledge-based approach and a more funda- mental methodology. Our present focus is on whether protein

  20. Speeding up protein folding: mutations that increase the rate at which Rop folds and unfolds by over four orders of magnitude

    E-Print Network [OSTI]

    Mochrie, Simon

    Speeding up protein folding: mutations that increase the rate at which Rop folds and unfolds. Introduction When a protein folds, the backbone and sidechain atoms organize from the extensive number protein folding usually occurs on the order of milliseconds to seconds, it is gener- ally accepted

  1. It was a hot summer night in New York in 1894, and the reporter had decided that it was time to meet the Wizard.

    E-Print Network [OSTI]

    Rowley, Clarence W.

    - ventor, Nikola Tesla. His name was on everyone's lips: "Every scientist knows his work and every foolish without prior written permission of the publisher. #12;Dinner at Delmonico's © 3 Nikola Tesla is almost to gener- ate electricity at the new plant under construction at Niagara Falls, but Tesla had taken 250

  2. 10 PERVASIVE computing Published by the IEEE Computer Society 1536-1268/07/$25.00 2007 IEEE Data Management

    E-Print Network [OSTI]

    Deshpande, Amol

    Hopkins University Vincent Tao Microsoft #12;Managing sensor web data The worldwide sensor web will gener- ate too much data to visualize or analyze manually. The popular tools of the trade, such as Matlab, R that can shield users from the complexities of the underlying se

  3. NUCLEOTIDE SUBSTITUTIONS AND THE EVOLUTION OF DUPLICATE GENES

    E-Print Network [OSTI]

    Oregon, University of

    167 NUCLEOTIDE SUBSTITUTIONS AND THE EVOLUTION OF DUPLICATE GENES JOHN S. CONERY Computational to gener- ate a corresponding alignment of the underlying nucleotide sequences and perform a codon by codon comparison of the nucleotides. Observed numbers of nucleotide substitutions can be used to make inferences

  4. Drug-induced toxicity on mitochondria and lipid metabolism: Mechanistic diversity and deleterious consequences for the liver

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Drug-induced toxicity on mitochondria and lipid metabolism: Mechanistic diversity and deleterious Numerous investigations have shown that mitochondrial dys- function is a major mechanism of drug-induced liver injury, which involves the parent drug or a reactive metabolite gener- ated through cytochromes P

  5. Restoration and Management of the Inner Mongolia Grassland

    E-Print Network [OSTI]

    Wu, Jianguo "Jingle"

    Synopsis Restoration and Management of the Inner Mongolia Grassland Require a Sustainable Strategy, anthropogenic activities have led to large-scale land degradation across the vast Inner Mongolia grassland for gener- ations (1, 2). Inner Mongolia covers an area of 1.1 million km2 and has a population of 20

  6. SMT-Based Bounded Model Checking for Embedded ANSI-C Software Lucas Cordeiro

    E-Print Network [OSTI]

    SMT-Based Bounded Model Checking for Embedded ANSI-C Software Lucas Cordeiro University by encoding word-level information in theories richer than propositional logic and using SMT solvers for the gener- ated verification conditions. Here, we investigate the application of different SMT solvers

  7. 240 IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY, VOL. 5, NO. 2, JUNE 2010 Information-Theoretically Secret Key Generation for

    E-Print Network [OSTI]

    Mandayam, Narayan

    -Theoretically Secret Key Generation for Fading Wireless Channels Chunxuan Ye, Suhas Mathur, Alex Reznik, Yogendra Shah as the basis for building practical secret key gener- ation protocols between two entities. We begin boundaries and a heuristic log likelihood ratio estimate to achieve an improved secret key generation rate

  8. IEEE COMMUNICATIONS LETTERS, TO APPEAR 1 Soft-Decision COVQ for Turbo-Coded AWGN

    E-Print Network [OSTI]

    Linder, Tamás

    IEEE COMMUNICATIONS LETTERS, TO APPEAR 1 Soft-Decision COVQ for Turbo-Coded AWGN and Rayleigh-decision channel-optimized vec- tor quantization (COVQ) scheme for Turbo-coded additive white Gaussian noise (AWGN) and Rayleigh fading chan- nels is proposed. The log likelihood ratio (LLR) gener- ated by the Turbo decoder

  9. Original Article Initial Effects of Woody Biomass Removal

    E-Print Network [OSTI]

    Chalcraft, David R.

    to government mandates and incentives for gener- ating alternatives to fossil fuels. For example, the Renewable renewable sources by certain dates (U.S. Department of Energy 2011). Biofuels may address concerns Fuels Standards mandates that 36 billion gallons of renew- able fuels be blended into liquid

  10. U N I V E R S I T Y O F A L A S K A F A I R B A N K S Admissions and the Registrar P.O. Box 757480 Fairbanks, AK 99775-7480 admissions@uaf.edu www.uaf.edu

    E-Print Network [OSTI]

    Ickert-Bond, Steffi

    absorption spectrometer, UV-VIS di- ode array spectrometers, two gas chromatographs interfaced with mass and analytical chemistry, and biochemistry. Undergraduate research leading to publications is strongly encouraged working on advanced topics that are gener- ally outside of the scope of an undergraduate curriculum. See

  11. INTRODUCTION The power industry is at the dawn of a new era

    E-Print Network [OSTI]

    Shihada, Basem

    that there may be almost 81 percent drop in output power over the span of just five minutes in a solar photoINTRODUCTION The power industry is at the dawn of a new era of transformation, triggered witnessed an increasing focus on the next gener- ation power grid from both industry and research. The goals

  12. Code Coverage Testing Using Hardware Performance Monitoring Support

    E-Print Network [OSTI]

    Colorado at Boulder, University of

    attempt to lower overhead by leveraging exist- ing Hardware Performance Monitoring (HPM) support complete cov- erage information. This paper extends the HPM approach in two ways. First, it utilizes. This paper shows that although HPM is gener- ally used to guide performance improvement efforts

  13. 5782 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 55, NO. 12, DECEMBER 2007 Max-SINR ISI/ICI-Shaping Multicarrier

    E-Print Network [OSTI]

    Schniter, Philip

    5782 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 55, NO. 12, DECEMBER 2007 Max-SINR ISI-symbol/inter-car- rier interference (ISI/ICI) subject to orthogonal or biorthogonal constraints. In doubly dispersive channels, however, complete sup- pression of ISI/ICI is impossible, and the ISI/ICI pattern gener- ated

  14. A Meshing Pipeline for Biomedical Computing Michael Callahan1

    E-Print Network [OSTI]

    Utah, University of

    , will incorporate a flexible suite of tools that will offer some gener- ality to mesh generation of biomedical, mesh generation, and numerical simulations. An impor- tant requirement of the numerical approximation of the resulting visualizations. Historically, the generation of these meshes has been a significant bottleneck

  15. Coal liquefaction process using pretreatment with a binary solvent mixture

    DOE Patents [OSTI]

    Miller, R.N.

    1986-10-14T23:59:59.000Z

    An improved process for thermal solvent refining or hydroliquefaction of non-anthracitic coal at elevated temperatures under hydrogen pressure in a hydrogen donor solvent comprises pretreating the coal with a binary mixture of an aromatic hydrocarbon and an aliphatic alcohol at a temperature below 300 C before the hydroliquefaction step. This treatment generally increases both conversion of coal and yields of oil. 1 fig.

  16. Water filtration optimization by geometric programming

    E-Print Network [OSTI]

    Wray, Duane Jimmy

    1970-01-01T23:59:59.000Z

    important as a means of removing suspended and colloidal matter. Sand is the most commonly used filter media but is rapidly being replaced by a combination of anthracite, sand, and garnet for faster filtration rates. Due to the complexity... of the filtering process, the design of these filters has remained an art without ever progressing to a science. Filters are in general designed from experience and rules of thumb without any assurance that maximum efficiency is attained at minimum cost. A...

  17. Coal desulfurization in a rotary kiln combustor. Final report, March 15, 1990--July 31, 1991

    SciTech Connect (OSTI)

    Cobb, J.T. Jr.

    1992-09-11T23:59:59.000Z

    The purpose of this project was to demonstrate the combustion of coal and coal wastes in a rotary kiln reactor with limestone addition for sulfur control. The rationale for the project was the perception that rotary systems could bring several advantages to combustion of these fuels, and may thus offer an alternative to fluid-bed boilers. Towards this end, an existing wood pyrolysis kiln (the Humphrey Charcoal kiln) was to be suitably refurbished and retrofitted with a specially designed version of a patented air distributor provided by Universal Energy, Inc. (UEI). As the project progressed beyond the initial stages, a number of issues were raised regarding the feasibility and the possible advantages of burning coals in a rotary kiln combustor and, in particular, the suitability of the Humphrey Charcoal kiln as a combustor. Instead, an opportunity arose to conduct combustion tests in the PEDCO Rotary Cascading-Bed Boiler (RCBB) commercial demonstration unit at the North American Rayon CO. (NARCO) in Elizabethton, TN. The tests focused on anthracite culm and had two objectives: (a) determine the feasibility of burning anthracite culms in a rotary kiln boiler and (b) obtain input for any further work involving the Humphrey Charcoal kiln combustor. A number of tests were conducted at the PEDCO unit. The last one was conducted on anthracite culm procured directly from the feed bin of a commercial circulating fluid-bed boiler. The results were disappointing; it was difficult to maintain sustained combustion even when large quantities of supplemental fuel were used. Combustion efficiency was poor, around 60 percent. The results suggest that the rotary kiln boiler, as designed, is ill-suited with respect to low-grade, hard to burn solid fuels, such as anthracite culm. Indeed, data from combustion of bituminous coal in the PEDCO unit suggest that with respect to coal in general, the rotary kiln boiler appears inferior to the circulating fluid bed boiler.

  18. Coal desulfurization in a rotary kiln combustor

    SciTech Connect (OSTI)

    Cobb, J.T. Jr.

    1992-09-11T23:59:59.000Z

    The purpose of this project was to demonstrate the combustion of coal and coal wastes in a rotary kiln reactor with limestone addition for sulfur control. The rationale for the project was the perception that rotary systems could bring several advantages to combustion of these fuels, and may thus offer an alternative to fluid-bed boilers. Towards this end, an existing wood pyrolysis kiln (the Humphrey Charcoal kiln) was to be suitably refurbished and retrofitted with a specially designed version of a patented air distributor provided by Universal Energy, Inc. (UEI). As the project progressed beyond the initial stages, a number of issues were raised regarding the feasibility and the possible advantages of burning coals in a rotary kiln combustor and, in particular, the suitability of the Humphrey Charcoal kiln as a combustor. Instead, an opportunity arose to conduct combustion tests in the PEDCO Rotary Cascading-Bed Boiler (RCBB) commercial demonstration unit at the North American Rayon CO. (NARCO) in Elizabethton, TN. The tests focused on anthracite culm and had two objectives: (a) determine the feasibility of burning anthracite culms in a rotary kiln boiler and (b) obtain input for any further work involving the Humphrey Charcoal kiln combustor. A number of tests were conducted at the PEDCO unit. The last one was conducted on anthracite culm procured directly from the feed bin of a commercial circulating fluid-bed boiler. The results were disappointing; it was difficult to maintain sustained combustion even when large quantities of supplemental fuel were used. Combustion efficiency was poor, around 60 percent. The results suggest that the rotary kiln boiler, as designed, is ill-suited with respect to low-grade, hard to burn solid fuels, such as anthracite culm. Indeed, data from combustion of bituminous coal in the PEDCO unit suggest that with respect to coal in general, the rotary kiln boiler appears inferior to the circulating fluid bed boiler.

  19. Superheat Control: A Hybrid Approach

    E-Print Network [OSTI]

    Elliot, M.S.; Rasmussen, B.P.; Walton, Z.; Bolding, B.

    temperature. This is generally referred to as 5°C (9°F) of superheat. The metering of refrigerant in air conditioning, refrigeration, or heat-pump systems is gener- ally achieved by a number of different valve types, which vary in expense and design sophistica.... The proposed valve has the potential for widespread use throughout the air-conditioning, refrigeration, and heat-pump industry as an alternative to other actively controlled valves, while preserving sufficient flexibility to allow for passive flow control...

  20. MAE 4263 Vapor Power Systems Problem 2-17

    E-Print Network [OSTI]

    .6 BTU/lbm thermal $ wnet P qboiler = 0.4794 = 48% Combining the boiler efficiency of 87%, the cycle efficiency of 48%, the gener- ator efficiency of 90%, and the plant auxiliaries at 8%, the gross station efficiency is = 0.87 × 0.4794 × 0.90 × 0.92 = 0.3453 and the net station heat rate is HR = 3412 0

  1. Pedigree evaluation of four decades of quarter horse breeding

    E-Print Network [OSTI]

    Tunnell, Jo Ann

    1981-01-01T23:59:59.000Z

    to be influential ancestors, and those that appeared as influential in more than one of the samples were King, Zantanon, Old Sorrel~ Little Joe, 1'~d. dnight, Hickory Bill, and Peter NcCue, Average coefficients of inbreeding and inter se relationship were... evident until many gener- ations have passed which or how many of the original foundation animals were in reality the influential foundation sires (Rhoad, 196lb) ~ Peter McCue and Traveler have been identified as the most prominent ancestors...

  2. Working Towards 100% Electronic Transactions on the Shop Floor

    E-Print Network [OSTI]

    Terwilliger, M.

    amounts of money on various automation projects in portfolio management technique. a piecemeal fashion. Many companies have made an 3. Building a strategy that art form out of developing short-sighted ROI's. the company would like to be in five ,nd ten... of strategic alternatives are now a necessity. END OF THE ERA OF PORTFOLIO ANALYSIS Shortly after Jack? Welch became Chairman of Gener al Electric, he made a number of interesting statements about corporate strategy. The single point that impressed us...

  3. doi:10.1016/S0016-7037(03)00495-2 Carbonate Complexation of Yttrium and the Rare Earth Elements in Natural Waters

    E-Print Network [OSTI]

    Meyers, Steven D.

    1 [MCO3 ][H ][M3 ] 1 [HCO3 ] 1 and CO3 H 2 [M(CO3)2 ][H ]2 [M3 ] 1 [HCO3 ] 2 , have very similar dependencies on ionic strength because the reaction MCO3 HCO3 ºM(CO3)2 H is isocoulombic. Potentiometric complexation is gener- ally dominated by the formation of carbonate complexes MCO3 and M(CO3)2 (Byrne

  4. Dry deposition of gaseous elemental iodine on water

    E-Print Network [OSTI]

    Allen, Michael Dana

    1974-01-01T23:59:59.000Z

    after they strike the surface. Aerodynamic mechanisms of mass transport have previously been listed; processes by which particles or gases "stick" to a collection medium are vagueIy reported as impaction, adsorption, electrostatic forces, snd... and vapors. The height at which the (4) volumetric concentration is measured should 'be reported in conJunction with an experimental value of V, but, in geners1, except for very close to the surface, the concentration does not change appreciably...

  5. Combined performance of coding and equalization for data transmitted over a fading channel

    E-Print Network [OSTI]

    Inayatullah, Azfar

    1997-01-01T23:59:59.000Z

    . , Hewlett Pacl'ard Inc. , Feb. 1996. [12] Hewlett Packard, "HP11759C, RF Channel Simulator, Operations and Service tVIanual, " Santa. Clara, California, Hewlett Packard Inc. , Aug. 1994. [13] Hewlett Packard, "HP8782B, Vector Signal Generator Operating i.... Johnson and Robert I. Desourdis, Advanced High Frequency Radio Communications, Boston: Artech House Publishers 1997, chap. 2, pp. 114 ? 120. [11] Hewlett Packard, "HP33120A, Function Generator/Arbitrary Waveform Gener- ator" Santa Clara, California...

  6. Universidad de Puerto Rico Recinto de Mayagez

    E-Print Network [OSTI]

    Gilbes, Fernando

    . Este sismo generó una secuencia de réplicas para la cual la RSPR ha localizado un total de 72 temblores Información detallada sobre los sismos que ocurrieron en este mes. Informe especial de campo de Guayama 2007 de Italia Informe sísmico para el mes de abril de 2009 Información detallada sobre los sismos que

  7. Quantum Field Effects in Stationary Electron Spin Resonance Spectroscopy

    E-Print Network [OSTI]

    Dmitri Yerchuck; Vyacheslav Stelmakh; Yauhen Yerchak; Alla Dovlatova

    2015-01-28T23:59:59.000Z

    It is proved on the example of electron spin resonance (ESR) studies of anthracites, that by strong electron-photon and electron-phonon interactions the formation of the coherent system of the resonance phonons takes place. The acoustic quantum Rabi oscillations were observed for the first time in ESR-spectroscopy. Its Rabi frequency value on the first damping stage was found to be equal 920.6 kHz, being to be independent on the microwave power level in the range 20 - 6 dB [0 dB corresponds to 100 mW]. By the subsequent increase of the microwave power the stepwise transition to the phenomenon of nonlinear quantum Rabi oscillations, characterised by splitting of the oscillation group of lines into two subgroups with doubling of the total lines' number takes place. Linewidth of an individual oscillation line becomes approximately the twofold narrower, being to be equal the only to $0.004 \\pm 0.001$ G. Along with the absorption process of EM-field energy the emission process was observed. It was found, that the emission process is the realization of the acoustic spin resonance, the source of acoustic wave power in which is the system of resonance phonons, accumulated in the samples by the registration with AFC. It has been found, that the lifetime of coherent state of a collective subsystem of resonance phonons in anthracites is very long and even by room temperature it is evaluated by the value exceeding 4.6 minutes. The model of new kinds of instantons was proposed. They are considered to be similar in the mathematical structure to Su-Schrieffer-Heeger solitons with "propagation" direction along time $t$-axis instead of space $z$-axis. The proof, that the superconductivity state in the anthracite samples studied is produced at the room temperature in ESR conditions in the accordance with the theory of the quantised acoustic field, has experimentally been obtained.

  8. The current state of CCS: Ongoing research at the University of Cambridge with application to the UK policy framework

    E-Print Network [OSTI]

    Daniels, K.A.; Huppert, H.E.; Neufeld, J.A.; Reiner, D.

    2012-12-14T23:59:59.000Z

    of crushed rock, reactive rock formations and un- derground reservoirs such as depleted oil and gas reservoirs or saline aquifers [3]. CO2 can 12Mainly bituminous coal, with some anthracite, is combusted for electricity in the UK. Bituminous coal is higher... Roadmap, Electricity Market Reform, carbon capture technologies, carbon sequestration, storage reservoir processes. JEL Classification O13 Q40 Q41 Q42 Q48 Q51 Q54 Q55 Q58 Contact K.A.Daniels@damtp.cam.ac.uk Publication December, 2012 Financial...

  9. Create a Consortium and Develop Premium Carbon Products from Coal

    SciTech Connect (OSTI)

    Frank Rusinko; John Andresen; Jennifer E. Hill; Harold H. Schobert; Bruce G. Miller

    2006-01-01T23:59:59.000Z

    The objective of these projects was to investigate alternative technologies for non-fuel uses of coal. Special emphasis was placed on developing premium carbon products from coal-derived feedstocks. A total of 14 projects, which are the 2003 Research Projects, are reported herein. These projects were categorized into three overall objectives. They are: (1) To explore new applications for the use of anthracite in order to improve its marketability; (2) To effectively minimize environmental damage caused by mercury emissions, CO{sub 2} emissions, and coal impounds; and (3) To continue to increase our understanding of coal properties and establish coal usage in non-fuel industries. Research was completed in laboratories throughout the United States. Most research was performed on a bench-scale level with the intent of scaling up if preliminary tests proved successful. These projects resulted in many potential applications for coal-derived feedstocks. These include: (1) Use of anthracite as a sorbent to capture CO{sub 2} emissions; (2) Use of anthracite-based carbon as a catalyst; (3) Use of processed anthracite in carbon electrodes and carbon black; (4) Use of raw coal refuse for producing activated carbon; (5) Reusable PACs to recycle captured mercury; (6) Use of combustion and gasification chars to capture mercury from coal-fired power plants; (7) Development of a synthetic coal tar enamel; (8) Use of alternative binder pitches in aluminum anodes; (9) Use of Solvent Extracted Carbon Ore (SECO) to fuel a carbon fuel cell; (10) Production of a low cost coal-derived turbostratic carbon powder for structural applications; (11) Production of high-value carbon fibers and foams via the co-processing of a low-cost coal extract pitch with well-dispersed carbon nanotubes; (12) Use of carbon from fly ash as metallurgical carbon; (13) Production of bulk carbon fiber for concrete reinforcement; and (14) Characterizing coal solvent extraction processes. Although some of the projects funded did not meet their original goals, the overall objectives of the CPCPC were completed as many new applications for coal-derived feedstocks have been researched. Future research in many of these areas is necessary before implementation into industry.

  10. EIS-0357- Gilberton Coal-to-Clean Fuels and Power Project in Giberton, PA

    Broader source: Energy.gov [DOE]

    This Environmental Impact Statement (EIS) assesses the potential environmental impacts that would result from a proposed Department of Energy (DOE) action to provide cost-shared funding for construction and operation of facilities near Gilberton, Pennsylvania, which have been proposed by WMPI PTY, LLC, for producing electricity, steam, and liquid fuels from anthracite coal waste (culm). The project was selected by DOE under the Clean Coal Power Initiative (CCPI) to demonstrate the integration of coal waste gasification and Fischer-Tropsch (F-T) synthesis of liquid hydrocarbon fuels at commercial scale.

  11. Coal desulfurization in a rotary kiln combustor. Quarterly report No. 1, April 16, 1990--July 15, 1990

    SciTech Connect (OSTI)

    Cobb, J.T. Jr.

    1990-08-15T23:59:59.000Z

    BCR National Laboratory (BCRNL) has initiated a project aimed at evaluating the technical and economic feasibility of using a rotary kiln, suitably modified, to burn Pennsylvania anthracite wastes, co-fired with high-sulfur bituminous coal. Limestone will be injected into the kiln for sulfur control, to determine whether high sulfur capture levels can be achieved with high sorbent utilization. The principal objectives of this work are: (1) to prove the feasibility of burning anthracite refuse, with co-firing of high-sulfur bituminous coal and with limestone injection for sulfur emissions control, in a rotary kiln fitted with a Universal Energy International (UEI) air injector system; (2) to determine the emissions levels of SO{sub x} and NO{sub x} and specifically to identify the Ca/S ratios that are required to meet New Source Performance Standards; (3) to evaluate the technical and economic merits of a commercial rotary kiln combustor in comparison to fluidized bed combustors; and, (4) to ascertain the need for further work, including additional combustion tests, prior to commercial application, and to recommend accordingly a detailed program towards this end.

  12. Coal desulfurization in a rotary kiln combustor

    SciTech Connect (OSTI)

    Cobb, J.T. Jr.

    1990-08-15T23:59:59.000Z

    BCR National Laboratory (BCRNL) has initiated a project aimed at evaluating the technical and economic feasibility of using a rotary kiln, suitably modified, to burn Pennsylvania anthracite wastes, co-fired with high-sulfur bituminous coal. Limestone will be injected into the kiln for sulfur control, to determine whether high sulfur capture levels can be achieved with high sorbent utilization. The principal objectives of this work are: (1) to prove the feasibility of burning anthracite refuse, with co-firing of high-sulfur bituminous coal and with limestone injection for sulfur emissions control, in a rotary kiln fitted with a Universal Energy International (UEI) air injector system; (2) to determine the emissions levels of SO{sub x} and NO{sub x} and specifically to identify the Ca/S ratios that are required to meet New Source Performance Standards; (3) to evaluate the technical and economic merits of a commercial rotary kiln combustor in comparison to fluidized bed combustors; and, (4) to ascertain the need for further work, including additional combustion tests, prior to commercial application, and to recommend accordingly a detailed program towards this end.

  13. A study of the Antilles Current using moored current meter arrays

    E-Print Network [OSTI]

    Maloney, William Everett

    1967-01-01T23:59:59.000Z

    characteristics of the Savcnius rotor have been reported previously by Gaul (1962). The output from the current meter is a ro11 of 16 mm photographic film containing current direction and speed data, data on case inclination, and timing pulses. An example... the summer npeia ions, wind directions and speeds were typical for this subtropical latitude being gener;illy out of the east at Table 2. Mooring nositioning data. oorlpg; I I IFix No. !:Date, " Time I !I, " L'ST :I ~L*'- 0. ! I ILongitude Il...

  14. Pollution error in the h-version of the finite-element method and the local quality of a-posteriori error estimators

    E-Print Network [OSTI]

    Mathur, Anuj

    1994-01-01T23:59:59.000Z

    in the L-shaped domain shown in Figs. la-ld. We applied boundary condi- 1 tions consistent with the singular solution u(r, 8) = rr sin(-) in the infinite wedge (see also Chapter II) and we assumed that we are interested only in the solution in the hol...-element solution in the subdomain. In Fig. l. la we show an adaptive finite-element mesh which was gener- ated using remeshing and linear elements, over the L-shaped domain fl. For this mesh an accuracy of 1. 09% for the relative error in the energy-norm over...

  15. The existence of metrics of nonpositive curvature on the Brady-Krammer complexes for finite-type Artin groups

    E-Print Network [OSTI]

    Choi, Woonjung

    2005-08-29T23:59:59.000Z

    ]. This construction was subsequently gener- alized to arbitrary Artin groups of finite-type by David Bessis [4] and by Tom Brady and Colum Watt [9]. In this chapter, I review the construction of these complexes, describe their symmetries, and discuss the previously...-Krammer complex for the braid group Braidn is an Eilenberg-Maclane space of type K(Braidn,1). Theorem A.2 (D.Bessis, T.Brady-C.Watt). For each finite-type Artin group A, the Brady-Krammer complex K for A is an Eilenberg-Maclane space of type K(A,1). Recently...

  16. Excitation-energy dependence of the mechanism for two-photon ionization of liquid H2O and D2O from 8.3to12.4eV

    E-Print Network [OSTI]

    Elles, Christopher G.; Jailaubekov, Askat E.; Crowell, Robert A.; Bradforth, Stephen E.

    2006-07-28T23:59:59.000Z

    or gener- ate dangerous amounts of hydrogen gas in radioactive waste storage tanks.1 Radiolysis and photolysis experiments pro- vide a window on the underlying chemistry in such systems by revealing information about the important reactions that occur... following ionization in a controlled environment. Each ionization event produces a hydroxyl radical, a hydronium ion, and a solvated electron within the first few picoseconds, as in the case of two-photon ionization. H2O#1;aq#2; + 2h#2;? OH#1;aq#2; + H3O #1...

  17. Information Effects in Valuation of Electricity and Water Service Attributes Using Contingent Valuation

    E-Print Network [OSTI]

    Akcura, Elcin

    and duration of power outages had a highly signi?cant negative impact on WTP. Willingness to pay for water attributes has mostly been analysed in devel- oping countries, mainly in Latin America and Asia. Casey et. al. (2005) use a CVM survey in the Amazon Basin... . In addition, the electricity industry will face the challenge of signi?cantly increasing the share of renewable energy in electricity gener- ation in order to meet the EU and government?s target of generating 20 per cent of energy from renewables by 2020...

  18. Process for solvent refining of coal using a denitrogenated and dephenolated solvent

    DOE Patents [OSTI]

    Garg, Diwakar (Macungie, PA); Givens, Edwin N. (Bethlehem, PA); Schweighardt, Frank K. (Allentown, PA)

    1984-01-01T23:59:59.000Z

    A process is disclosed for the solvent refining of non-anthracitic coal at elevated temperatures and pressure in a hydrogen atmosphere using a hydrocarbon solvent which before being recycled in the solvent refining process is subjected to chemical treatment to extract substantially all nitrogenous and phenolic constituents from the solvent so as to improve the conversion of coal and the production of oil in the solvent refining process. The solvent refining process can be either thermal or catalytic. The extraction of nitrogenous compounds can be performed by acid contact such as hydrogen chloride or fluoride treatment, while phenolic extraction can be performed by caustic contact or contact with a mixture of silica and alumina.

  19. Enhancement of pulverized coal combustion by plasma technology

    SciTech Connect (OSTI)

    Gorokhovski, M.A.; Jankoski, Z.; Lockwood, F.C.; Karpenko, E.I.; Messerle, V.E.; Ustimenko, A.B. [University of Rouen, Rouen (France)

    2007-07-01T23:59:59.000Z

    Plasma-assisted pulverized coal combustion is a promising technology for thermal power plants (TPP). This article reports one- and three- dimensional numerical simulations, as well as laboratory and industrial measurements of coal combustion using a plasma-fuel system (PFS). The chemical kinetic and fluid mechanics involved in this technology are analysed. The results show that a PFS, can be used to promote early ignition and enhanced stabilization of a pulverized coal flame. It is shown that this technology, in addition to enhancing the combustion efficiency of the flame, reduces harmful emissions from power coals of all ranks (brown, bituminous, anthracite and their mixtures). Data summarising the experience of 27 pulverized coal boilers in 16 thermal power plants in several countries (Russia, Kazakhstan, Korea, Ukraine, Slovakia, Mongolia and China), embracing steam productivities from 75 to 670 tons per hour (TPH), are presented. Finally, the practical computation of the characteristics of the PFS, as function of coal properties, is discussed.

  20. The role of coal in industrialization: A case study of Nigeria

    SciTech Connect (OSTI)

    Akarakiri, J.B. (Obafemi Awolowo Univ., Ile-Ife (Nigeria))

    1989-01-01T23:59:59.000Z

    Coal is a mineral matter found in layers or beds in sedimentary rocks. It is a very highly variable substance. In addition to the variations from lignite to bituminous and anthracite, there are vast differences in its heating value, amount of volatiles, sulfur, moisture and so on. The chemical and physical properties of coal make it an important industrial raw material. There is proven 639 million tonnes of coal reserves in Nigeria. This paper examines the potential and current role of coal in the industrialization of Nigeria. Industries are now dependent on fuel oil as a source of fuel because of its economic and technological advantages over coal. Coal is a source of industrial energy for the future after the known oil reserves might have been exhausted. In the short term, coal can be used as a material for chemicals, iron and steel production as well as a substitute for wood energy in the process of industrialization.

  1. A study of the volatile matter of coal as a function of the heating rate

    SciTech Connect (OSTI)

    Yanes, E.; Wilhite, D.; Riley, J.M. Jr. [Western Kentucky Univ., Bowling Green, KY (United States)] [and others

    1996-12-31T23:59:59.000Z

    A study of the volatile matter yields as a function of the heating rate was conducted. A suite of 21 coal and coke samples varying in rank from anthracitic to lignitic and heating rates from 10{degrees}C/min to about 450{degrees}C/min were used in the study. Heating rates up to 60{degrees}C per minute, which are typically used in ASTM Test Method 5142 (instrumental Proximate Analysis), were achieved in a macro thermogravimetric analysis (TGA) system. Heating rates of 50-200{degrees}C/min were obtained in a micro TGA system. All measurements were made in a nitrogen atmosphere. The results of the study illustrate the dependence of the volatile matter yield on the heating rate. For most coals and cokes the optimum heating rate for determining volatile matter values that agree with those obtained by ASTM Method D 3175 appears to be in the 100-150{degrees}C range.

  2. Applications and experiences with super duplex stainless steel in wet FGD scrubber systems

    SciTech Connect (OSTI)

    Francis, R.; Byrne, G.; Warburton, G.; Hebdon, S. [Weir Materials Ltd., Manchester (United Kingdom)

    1998-12-31T23:59:59.000Z

    The paper presents the properties of the author`s company`s proprietary super duplex stainless steel. Work is presented showing the development of a more realistic laboratory solution representing typical limestone slurries found in real flue gas desulfurization (FGD) systems. The importance of additions of metal ions such as Fe{sup 3+} and Mn{sup 2+} as well as partially oxidized sulfur species is demonstrated. Results are presented comparing the crevice corrosion resistance of super duplex stainless steel in these slurries with other commonly used wrought and cast stainless steels, for both simulated anthracite and lignite type slurries. Data from loop tests on the erosion resistance of a range of alloys in simulated FGD slurries is presented. The results clearly show the superior resistance of super duplex stainless steel to both crevice corrosion and erosion in FGD slurries. Finally the experiences in UK FGD systems with both cast and wrought super duplex stainless steel are presented.

  3. The relationship between the thermoplastic behavior of blends and their component coals

    SciTech Connect (OSTI)

    Sakurovs, R.

    1999-07-01T23:59:59.000Z

    The thermoplastic behaviors of a number of coking coal blends were measured using proton magnetic resonance thermal analysis (PMRTA) to determine to what extent they were affected by interactions between the component coals. Most blends showed evidence that at temperatures near their temperatures of maximum fluidity the extent to which they fused was different to that expected if the coals did not interact. Only blends of coking coals of different rank fused to a greater extent than expected in the absence of interactions. Semi-anthracite, low rank coals and charcoal reduced the extent of fusion of coking coals to values below those expected if they were acting as inert diluents. These interactions are interpreted as being mediated by transfer of volatile material between the coals on heating.

  4. Development of biological coal gasification (MicGAS process). Final report, May 1, 1990--May 31, 1995

    SciTech Connect (OSTI)

    NONE

    1998-12-31T23:59:59.000Z

    ARCTECH has developed a novel process (MicGAS) for direct, anaerobic biomethanation of coals. Biomethanation potential of coals of different ranks (Anthracite, bitumious, sub-bitumious, and lignites of different types), by various microbial consortia, was investigated. Studies on biogasification of Texas Lignite (TxL) were conducted with a proprietary microbial consortium, Mic-1, isolated from hind guts of soil eating termites (Zootermopsis and Nasutitermes sp.) and further improved at ARCTECH. Various microbial populations of the Mic-1 consortium carry out the multi-step MicGAS Process. First, the primary coal degraders, or hydrolytic microbes, degrade the coal to high molecular weight (MW) compounds. Then acedogens ferment the high MW compounds to low MW volatile fatty acids. The volatile fatty acids are converted to acetate by acetogens, and the methanogens complete the biomethanation by converting acetate and CO{sub 2} to methane.

  5. Determination of the effect of different additives in coking blends using a combination of in situ high-temperature {sup 1}H NMR and rheometry

    SciTech Connect (OSTI)

    Miguel C. Diaz; Karen M. Steel; Trevor C. Drage; John W. Patrick; Colin E. Snape [Nottingham University, Nottingham (United Kingdom). Nottingham Fuel and Energy Centre, School of Chemical, Environmental and Mining Engineering

    2005-12-01T23:59:59.000Z

    High-temperature {sup 1}H NMR and rheometry measurements were carried out on 4:1 wt/wt blends of a medium volatile bituminous coal with two anthracites, two petroleum cokes, charcoal, wood, a low-temperature coke breeze, tyre crumb, and active carbon to determine the effects on fluidity development to identify the parameters responsible for these effects during pyrolysis and to study possible relationships among the parameters derived from these techniques. Positive, negative, and neutral effects were identified on the concentration of fluid material. Small positive effects (ca. 5-6%) were caused by blending the coal with petroleum cokes. Charcoal, wood, and active carbon all exerted negative effects on concentration (18-27% reduction) and mobility (12-25% reduction in T2) of the fluid phase, which have been associated with the inert character and high surface areas of these additives that adsorb the fluid phase of the coal. One of the anthracites and the low-temperature coke breeze caused deleterious effects to a lesser extent on the concentration (7-12%) and mobility (13-17%) of the fluid material, possibly due to the high concentration of metals in these additives (ca. 11% ash). Despite the high fluid character of tyre crumb at the temperature of maximum fluidity of the coal (73%), the mobility of the fluid phase of the blend was lower than expected. The comparison of {sup 1}H NMR and rheometry results indicated that to account for the variations in minimum complex viscosity for all the blends, both the maximum concentration of fluid phase and the maximum mobility of the fluid material had to be considered. For individual blends, two exponential relationships have been found between the complex viscosity and the concentration of solid phase in both the softening and resolidification stages but the parameters are different for each blend. 30 refs., 8 figs., 5 tabs.

  6. Biofuel alternatives to ethanol: pumping the microbial well

    SciTech Connect (OSTI)

    Fortman, J. L.; Chhabra, Swapnil; Mukhopadhyay, Aindrila; Chou, Howard; Lee, Taek Soon; Steen, Eric; Keasling, Jay D.

    2009-12-02T23:59:59.000Z

    Engineered microorganisms are currently used for the production of food products, pharmaceuticals, ethanol fuel and more. Even so, the enormous potential of this technology has yet to be fully exploited. The need for sustainable sources of transportation fuels has gener-ated a tremendous interest in technologies that enable biofuel production. Decades of work have produced a considerable knowledge-base for the physiology and pathway engineering of microbes, making microbial engineering an ideal strategy for producing biofuel. Although ethanol currently dominates the biofuel mar-ket, some of its inherent physical properties make it a less than ideal product. To highlight additional options, we review advances in microbial engineering for the production of other potential fuel molecules, using a variety of biosynthetic pathways.

  7. Post-Nonlinear Sparse Component Analysis Using Single-Source Zones and Functional Data Clustering

    E-Print Network [OSTI]

    Puigt, Matthieu; Mouchtaris, Athanasios

    2012-01-01T23:59:59.000Z

    In this paper, we introduce a general extension of linear sparse component analysis (SCA) approaches to postnonlinear (PNL) mixtures. In particular, and contrary to the state-of-art methods, our approaches use a weak sparsity source assumption: we look for tiny temporal zones where only one source is active. We investigate two nonlinear single-source confidence measures, using the mutual information and a local linear tangent space approximation (LTSA). For this latter measure, we derive two extensions of linear single-source measures, respectively based on correlation (LTSA-correlation) and eigenvalues (LTSA-PCA). A second novelty of our approach consists of applying functional data clustering techniques to the scattered observations in the above single-source zones, thus allowing us to accurately estimate them.We first study a classical approach using a B-spline approximation, and then two approaches which locally approximate the nonlinear functions as lines. Finally, we extend our PNL methods to more gener...

  8. Upgrading low rank coal using the Koppelman Series C process

    SciTech Connect (OSTI)

    Merriam, N.W., Western Research Institute

    1998-01-01T23:59:59.000Z

    Development of the K-Fuel technology began after the energy shortage of the early 1970s in the United States led energy producers to develop the huge deposits of low-sulfur coal in the Powder River Basin (PRB) of Wyoming. PRB coal is a subbituminous C coal containing about 30 wt % moisture and having heating values of about 18.6 megajoules/kg (8150 Btu/lb). PRB coal contains from 0.3 to 0.5 wt % sulfur, which is nearly all combined with the organic matrix in the coal. It is in much demand for boiler fuel because of the low-sulfur content and the low price. However, the low-heating value limits the markets for PRB coal to boilers specially designed for the high- moisture coal. Thus, the advantages of the low-sulfur content are not available to many potential customers having boilers that were designed for bituminous coal. This year about 250 million tons of coal is shipped from the Powder River Basin of Wyoming. The high- moisture content and, consequently, the low-heating value of this coal causes the transportation and combustion of the coal to be inefficient. When the moisture is removed and the heating value increased the same bundle of energy can be shipped using one- third less train loads. Also, the dried product can be burned much more efficiently in boiler systems. This increase in efficiency reduces the carbon dioxide emissions caused by use of the low-heating value coal. Also, the processing used to remove water and restructure the coal removes sulfur, nitrogen, mercury, and chlorides from the coal. This precombustion cleaning is much less costly than stack scrubbing. PRB coal, and other low-rank coals, tend to be highly reactive when freshly mined. These reactive coals must be mixed regularly (every week or two) when fresh, but become somewhat more stable after they have aged for several weeks. PRB coal is relatively dusty and subject to self-ignition compared to bituminous coals. When dried using conventional technology, PRB coal is even more dusty and more susceptible to spontaneous combustion than the raw coal. Also, PRB coal, if dried at low temperature, typically readsorbs about two- thirds of the moisture removed by drying. This readsorption of moisture releases the heat of adsorption of the water which is a major cause of self- heating of low-rank coals at low temperature.

  9. Data base for the analysis of compositional characteristics of coal seams and macerals. Final report. Part 2. A multivariate study of the interrelationships among selected variables of the organic fraction of samples of United States' coals

    SciTech Connect (OSTI)

    Gerencher, J.J. Jr.

    1983-01-01T23:59:59.000Z

    Multivariate statistical techniques have been applied to study interrelationships among 12 variables within a set of 277 coals representing whole-seam channel, column, and core samples obtained from each of the 6 coal provinces of the United States, and varying in rank from lignite through anthracite. The data are maintained in computerized data base at The Pennsylvania State University Coal Research Section. The variables selected are components of the elemental analysis (carbon, oxygen, organic sulfur, hydrogen, and nitrogen), selected components of the proximate analysis (volatile matter and moisture), calorific value, reflectance of vitrinite, and the relative proportions of the 3 maceral groups (total vitrinite, inertinite, and liptinite group macerals). Faactor analyses performed on the entire data set and on subsets separated on the basis of rank, geographic location, and by cluster analysis indicated that rank is the most important factor in determining the amount of variation of each data set. The rank-dependent variables for the entire data set are carbon, reflectance, oxygen, volatile matter, calorific value, and moisture. The maceral groups account for the next greatest source of variation. Organic sulfur is independent of the first 2 factors and is the third most important source of variation. Cluster analyses indicated that the most significant partitioning produces 4 groups which are differentiated primarily on the basis of rank, maceral composition, and organic sulfur content. Factor analyses of the individual groups provide insights into the coalification processes of these more homogeneous coal associations.

  10. Role of microbial iron reduction in the dissolution of iron hydroxysulfate minerals - article no. G01012

    SciTech Connect (OSTI)

    Jones, E.J.P.; Nadeau, T.L.; Voytek, M.A.; Landa, E.R. [US Geological Survey, Reston, VA (United States)

    2006-03-28T23:59:59.000Z

    Reduction of structural sulfate in the iron-hydroxysulfate mineral jarosite by sulfate-reducing bacteria has previously been demonstrated. The primary objective of this work was to evaluate the potential for anaerobic dissolution of the iron-hydroxysulfate minerals jarosite and schwertmannite at neutral pH by iron-reducing bacteria. Mineral dissolution was tested using a long-term cultivar, Geobacter metallireducens strain GS-15, and a fresh isolate Geobacter sp. strain ENN1, previously undescribed. ENN1 was isolated from the discharge site of Shadle Mine, in the southern anthracite coalfield of Pennsylvania, where schwertmannite was the predominant iron-hydroxysulfate mineral. When jarosite from Elizabeth Mine (Vermont) was provided as the sole terminal electron acceptor, resting cells of both G. metallireducens and ENN1 were able to reduce structural Fe(III), releasing Fe{sup +2}, SO{sub 4}{sup -2}, and K{sup +} ions. A lithified jarosite sample from Utah was more resistant to microbial attack, but slow release of Fe{sup +2} was observed. Neither bacterium released Fe{sup +2} from poorly crystalline synthetic schwertmannite. Our results indicate that exposure of jarosite to iron-reducing conditions at neutral pH is likely to promote the mobility of hazardous constituents and should therefore be considered in evaluating waste disposal and/or reclamation options involving jarosite-bearing materials.

  11. Technical support to the Solvent Refined Coal (SRC) demonstration projects: assessment of current research and development

    SciTech Connect (OSTI)

    Edwards, M.S.; Rodgers, B.R.; Brown, C.H.; Carlson, P.K.; Gambill, W.R.; Gilliam, T.M.; Holmes, J.M.; Krishnan, R.P.; Parsly, L.F.

    1980-12-01T23:59:59.000Z

    A program to demonstrate Solvent Refined Coal (SRC) technology has been initiated by the US Department of Energy (DOE) in partnership with two industrial groups. Project management responsibility has been assigned to the Oak Ridge Operations Office (ORO) of DOE. ORO requested that the Oak Ridge National Laboratory assess current research and development (R and D) activities and develop recommendations for those activities that might contribute to successful completion of the SRC demonstration plant projects. The objectives of this final report are to discuss in detail the problem areas in SRC; to discuss the current and planned R and D investigations relevant to the problems identified; and to suggest appropriate R and D activities in support of designs for the SRC demonstration plants. Four types of R and D activities are suggested: continuation of present and planned activities; coordination of activities and results, present and proposed; extension/redirection of activities not involving major equipment purchase or modifications; and new activities. Important examples of the first type of activity include continuation of fired heater, slurry rheology, and slurry mixing studies at Ft. Lewis. Among the second type of activity, coordination of data acquisition and interpretation is recommended in the areas of heat transfer, vapor/liquid equilibria, and physical properties. Principal examples of recommendations for extension/redirection include screening studies at laboratory scale on the use of carbonaceous precoat (e.g., anthracite) infiltration, and 15- to 30-day continuous tests of the Texaco gasifier at the Texaco Montebello facility (using SRC residues).

  12. Feasible experimental study on the utilization of a 300 MW CFB boiler desulfurizating bottom ash for construction applications

    SciTech Connect (OSTI)

    Lu, X.F.; Amano, R.S. [University of Wisconsin, Milwaukee, WI (United States). Dept. of Mechanical Engineering

    2006-12-15T23:59:59.000Z

    CFB boiler ash cannot be used as a cement replacement in concrete due to its unacceptably high sulfur content. The disposal in landfills has been the most common means of handling ash in circulating fluidized bed boiler power plants. However for a 300 MW CFB boiler power plant, there will be 600,000 tons of ash discharged per year and will result in great volumes and disposal cost of ash byproduct. It was very necessary to solve the utilization of CFB ash and to decrease the disposal cost of CFB ash. The feasible experimental study results on the utilization of the bottom ashes of a 300 MW CFB boiler in Baima power plant in China were reported in this paper. The bottom ashes used for test came from the discharged bottom ashes in a 100 MW CFB boiler in which the anthracite and limestone designed for the 300 MW CFB project was burned. The results of this study showed that the bottom ash could be used for cementitious material, road concrete, and road base material. The masonry cements, road concrete with 30 MPa compressive strength and 4.0 MPa flexural strength, and the road base material used for base courses of the expressway, the main road and the minor lane were all prepared with milled CFB bottom ashes in the lab. The better methods of utilization of the bottom ashes were discussed in this paper.

  13. Sulfur and ash reduction potential and selected chemical and physical properties of United States coals. [Contains glossary

    SciTech Connect (OSTI)

    Cavallaro, J.A.; Deurbrouck, A.W.; Killmeyer, R.P.; Fuchs, W. (USDOE Pittsburgh Energy Technology Center, PA (USA). Coal Preparation Div.); Jacobsen, P.S. (Burns and Roe Services Corp., Pittsburgh, PA (USA))

    1991-02-01T23:59:59.000Z

    This report presents the washability and comprehensive characterization results of 184 raw coal channel samples, including anthracite, bituminous and lignite coals, collected from the Central Region of the United States. This is the second of a three volume report on the coals of the United States. All the data are presented in six appendices. Statistical techniques and definitions are presented in Appendix A, and a glossary of terms is presented in Appendix B. The complete washability data and an in-depth characterization of each sample are presented alphabetically by state in Appendix C. In Appendix D, a statistical evaluation is given for the composited washability data, selected chemical and physical properties and washability data interpolated at various levels of Btu recovery. This presentation is shown by state, section, and region where four or more samples were collected. Appendix E presents coalbed codes and names for the Central Region coals. Graphical summations are presented by state, section and region showing the effects of crushing on impurity reductions, and the distribution of raw and clean coal samples meeting various levels of SO{sub 2} emissions. 35 figs., 5 tabs.

  14. Characterizing and modeling combustion of mild-gasification chars in pressurized fluidized beds

    SciTech Connect (OSTI)

    Daw, C.S.

    1993-03-01T23:59:59.000Z

    Performance estimates for the UCC2, IGTP1, and IGTP2 chars were made for a typical utility PFBC boiler having nominal characteristics similar to those of the American Electric Power 75 MW(e) Tidd PFBC demonstration facility. Table 2 summarizes the assumed boiler operating conditions input to the PFBC simulation code. Input fuel parameters for the chars and reference fuels were determined from their standard ASTM analyses (Table 1) and the results of the bench-scale characterization tests at B&W`s Alliance Research Center. The required characterization information for the reference fuels was available from the B&W data base, and the combustion reactivity information for the mild-gasification chars was generated in the pressurized bench-scale reactor as described earlier. Note that the combustion reactivity parameters for Beulah lignite are those previously measured at low-pressure conditions. It was necessary to use the previous values as the new parameters could not be accurately measured in the pressurized bench-scale facility. Based on very limited measurements of particle size attrition in paste-type feed systems, it was assumed that all of the fuels (including the chars) would have a very small (essentially negligible) degree of attrition in the feed system. Char devolatilization parameters were assumed to be equal to those of anthracite because of the very low levels of volatiles present in UCC2, IGTP1, and IGTP2. Major fuel input parameters and higher heating values are summarized in Table 3.

  15. Characterizing and modeling combustion of mild-gasification chars in pressurized fluidized beds

    SciTech Connect (OSTI)

    Daw, C.S.

    1993-01-01T23:59:59.000Z

    Performance estimates for the UCC2, IGTP1, and IGTP2 chars were made for a typical utility PFBC boiler having nominal characteristics similar to those of the American Electric Power 75 MW(e) Tidd PFBC demonstration facility. Table 2 summarizes the assumed boiler operating conditions input to the PFBC simulation code. Input fuel parameters for the chars and reference fuels were determined from their standard ASTM analyses (Table 1) and the results of the bench-scale characterization tests at B W's Alliance Research Center. The required characterization information for the reference fuels was available from the B W data base, and the combustion reactivity information for the mild-gasification chars was generated in the pressurized bench-scale reactor as described earlier. Note that the combustion reactivity parameters for Beulah lignite are those previously measured at low-pressure conditions. It was necessary to use the previous values as the new parameters could not be accurately measured in the pressurized bench-scale facility. Based on very limited measurements of particle size attrition in paste-type feed systems, it was assumed that all of the fuels (including the chars) would have a very small (essentially negligible) degree of attrition in the feed system. Char devolatilization parameters were assumed to be equal to those of anthracite because of the very low levels of volatiles present in UCC2, IGTP1, and IGTP2. Major fuel input parameters and higher heating values are summarized in Table 3.

  16. Far- and mid-infrared spectroscopy of complex organic matter of astrochemical interest: coal, heavy petroleum fractions, and asphaltenes

    E-Print Network [OSTI]

    Cataldo, F; Manchado, A

    2012-01-01T23:59:59.000Z

    The coexistence of a large variety of molecular species (i.e., aromatic, cycloaliphatic and aliphatic) in several astrophysical environments suggests that unidentified IR emission (UIE) occurs from small solid particles containing a mix of aromatic and aliphatic structures (e.g., coal, petroleum, etc.), renewing the astronomical interest on this type of materials. A series of heavy petroleum fractions namely DAE, RAE, BQ-1, and asphaltenes derived from BQ-1 were used together with anthracite coal and bitumen as model compounds in matching the band pattern of the emission features of proto-planetary nebulae (PPNe). All the model materials were examined in the mid-infrared (2.5-16.7 um) and for the first time in the far-infrared (16.7-200 um), and the IR bands were compared with the UIE from PPNe. The best match of the PPNe band pattern is offered by the BQ-1 heavy aromatic oil fraction and by its asphaltenes fraction. Particularly interesting is the ability of BQ-1 to match the band pattern of the aromatic-ali...

  17. Pressurized pyrolysis and gasification of Chinese typical coal samples

    SciTech Connect (OSTI)

    Hanping Chen; Zhiwu Luo; Haiping Yang; Fudong Ju; Shihong Zhang [Huazhong University of Science and Technology, Wuhan (China). State Key Laboratory of Coal Combustion

    2008-03-15T23:59:59.000Z

    This paper aims to understand the pyrolysis and gasification behavior of different Chinese coal samples at different pressures. First, the pyrolysis of four typical Chinese coals samples (Xiaolongtan brown coal, Shenfu bituminous coal, Pingzhai anthracite coal, and Heshan lean coal) were carried out using a pressurized thermogravimetric analyzer at ambient pressure and 3 MPa, respectively. The surface structure and elemental component of the resultant char were measured with an automated gas adsorption apparatus and element analyzer. It was observed that higher pressure suppressed the primary pyrolysis, while the secondary pyrolysis of coal particles was promoted. With respect to the resultant solid char, the carbon content increased while H content decreased; however, the pore structure varied greatly with increasing pressure for different coal samples. For Xiaolongtan brown coal (XLT) char, it decreased greatly, while it increased obviously for the other three char types. Then, the isothermal gasification behavior of solid char particles was investigated using an ambient thermal analyzer with CO{sub 2} as the gasifying agent at 1000{sup o}C. The gasification reactivity of solid char was decreased greatly with increasing pyrolysis pressure. However, the extent of change displayed a vital relation with the characteristics of the original coal sample. 26 refs., 5 figs., 5 tabs.

  18. Low-rank-coal study national needs for resource development. Volume 1. Executive summary

    SciTech Connect (OSTI)

    Elliot, Dr., Martin A.; Hill, George R.; Jonakin, James; Crutchfield, Paul W.; Severson, Donald E.; White, David M.; Yeager, Kurt

    1980-11-01T23:59:59.000Z

    Low-rank coals - lignite and subbituminous - are those which have been subjected to the least amount of metamorphic change during the coal-forming process. As such, they retain greater fractions of moisture and volatile matter from the original peat material, and contain less fixed carbon, than the high-rank coals - bituminous and anthracite. The primary measure used to classify the lower ranks of coal is heating value. Other important characteristics which distinguish the low-rank coals from high-rank coals are discussed in this report. Low-rank coals represent a major, and largely untapped, energy resource for this country. Very extensive deposits of lignite and subbituminous coal exist in the western states, the Gulf coast, and Alaska. Major deposits of low-rank coal are also found in many other countries, most notably the USSR, Australia, Canada, and the central and eastern European nations. Worldwide coal statistics indicate that low-rank coals account for roughly one-third of the total resource and current production tonnages. This report recommends a comprehensive national research, development, and demonstration (RD and D) program to enhance the development of low-rank coals. The major conclusion of this study is that the unique properties of these coals affect the technologies for their extraction, preparation, direct use, and conversion and justify a separate focus on low-rank coals in the national RD and D efforts.

  19. Injury experience in coal mining, 1991

    SciTech Connect (OSTI)

    Not Available

    1991-12-31T23:59:59.000Z

    This Mine Safety and Health Administration (MSHA) informational report reviews in detail the occupational injury and illness experience of coal mining in the United States for 1991. Data reported by operators of mining establishments concerning work injuries are summarized by work location, accident classification, part of body injured, nature of injury, occupation, and anthracite or bituminous coal. Related information on employment, worktime, and operating activity also is presented. Data reported by independent contractors performing certain work at mining locations are depicted separately in this report. For ease of comparison between coal mining and the metal and nonmetal mineral mining industries, summary reference tabulations are included at the end of both the operator and the contractor sections of this report. Data used in compiling this report were reported by operators of coal mines and preparation plants on a mandatory basis as required under the Federal Mine Safety and Health Act of 1977, Public Law 91-173,as amended by Public Law 95-164. Since January 1, 1978, operators of mines or preparation plants or both which are subject to the Act have been required under 30 CFR, Part 50, to submit reports of injuries, occupational illnesses, and related data.

  20. Prospects for coal briquettes as a substitute fuel for wood and charcoal in US Agency for International Development Assisted countries

    SciTech Connect (OSTI)

    Perlack, R.D.; Stevenson, G.G.; Shelton, R.B.

    1986-02-01T23:59:59.000Z

    Fuelwood shortages and potential shortages are widespread throughout the developing world, and are becoming increasingly more prevalent because of the clearing of land for subsistence and plantation agriculture, excessive and inefficient commercial timber harvesting for domestic and export construction, and charcoal production to meet rising urban demands. Further, the environmental and socioeconomic consequences of the resulting deforestation are both pervasive and complex. This report focuses on the substitution of coal briquettes for fuelwood. Although substantial adverse health effects could be expected from burning non-anthracite coal or coal briquettes, a well-developed technique, carbonization, exists to convert coal to a safer form for combustion. The costs associated with briquetting and carbonizing coal indicate that ''smokeless'' coal briquettes can be produced at costs competitive with fuelwood and charcoal. The US Agency for International Development (USAID) is working on implementing this energy option in Haiti and Pakistan by (1) evaluating resources, (2) assessing markets, (3) analyzing technologies, (4) studying government policy and planning, and (5) packaging the idea for the private sector to implement. 26 refs., 2 figs., 12 tabs.

  1. Emissions of airborne toxics from coal-fired boilers: Mercury

    SciTech Connect (OSTI)

    Huang, H.S.; Livengood, C.D.; Zaromb, S.

    1991-09-01T23:59:59.000Z

    Concerns over emissions of hazardous air Pollutants (air toxics) have emerged as a major environmental issue, and the authority of the US Environmental Protection Agency to regulate such pollutants was greatly expanded through the Clean Air Act Amendments of 1990. Mercury has been singled out for particular attention because of concerns over possible effects of emissions on human health. This report evaluates available published information on the mercury content of coals mined in the United States, on mercury emitted in coal combustion, and on the efficacy of various environmental control technologies for controlling airborne emissions. Anthracite and bituminous coals have the highest mean-mercury concentrations, with subbituminous coals having the lowest. However, all coal types show very significant variations in mercury concentrations. Mercury emissions from coal combustion are not well-characterized, particularly with regard to determination of specific mercury compounds. Variations in emission rates of more than an order of magnitude have been reported for some boiler types. Data on the capture of mercury by environmental control technologies are available primarily for systems with electrostatic precipitators, where removals of approximately 20% to over 50% have been reported. Reported removals for wet flue-gas-desulfurization systems range between 35 and 95%, while spray-dryer/fabric-filter systems have given removals of 75 to 99% on municipal incinerators. In all cases, better data are needed before any definitive judgments can be made. This report briefly reviews several areas of research that may lead to improvements in mercury control for existing flue-gas-clean-up technologies and summarizes the status of techniques for measuring mercury emissions from combustion sources.

  2. Characterization and fate of vapor-phase organic constituents from atmospheric pressure fluidized bed combustors (AFBC): East Stroudsburg University AFBC

    SciTech Connect (OSTI)

    Yeh, Hsu-Chi; Newton, G.J.; Henderson, T.R.; Hobbs, C.H.

    1987-08-01T23:59:59.000Z

    Very little research has been devoted to the characterization of vapor-phase organic compounds in gaseous streams. Because of the concerns that gaseous organic compounds from FBCs may include potentially toxic and/or mutagenic materials. We will measure vapor-phase hydrocarbon concentrations in the process streams of operating FBCs. This report describes our field sampling results on the atmospheric pressure fluidized bed combustor (AFBC) at the East Stroudsburg University during its normal operation for supplying heat and hot water to the campus. This AFBC has a bed size of 36 ft/sup 2/ and was burning anthracite culm. The culm consumption rates during the week of our sampling period were 1600 to 3000 lb/hr. Emphasis was placed on characterization of process stream effluents, including particles and vapor-phase organic constituents. Results indicated that the mass concentration (or loading) of particulate matter within the effluent stream was similar to other FBCs that have been studied. The particulate mass concentration measured after the baghouse location was 0.0048 g/m/sup 3/ (0.0047 lb/10/sup 6/ Btu). This was equivalent to a total of 35 g/hr of particulate emissions. The fraction of particulate material presented as organics (extractable fraction) was, on the average, less than 2% of total mass of particulate emissions. The vapor-phase organic contents indicated that the quantities of individual polycyclic aromatic hydrocarbons (PAHs) were low, being less than 2.5 ..mu..g/m/sup 3/ for any individual sample. Most of the PAHs detected were low boiling compounds such as naphthalene or phenanthrene, with trace amounts of pyrene. 22 refs., 13 figs., 11 tabs.

  3. Update on use of mine pool water for power generation.

    SciTech Connect (OSTI)

    Veil, J. A.; Puder, M. G.; Environmental Science Division

    2006-09-30T23:59:59.000Z

    In 2004, nearly 90 percent of the country's electricity was generated at power plants using steam-based systems (EIA 2005). Electricity generation at steam electric plants requires a cooling system to condense the steam. With the exception of a few plants using air-cooled condensers, most U.S. steam electric power plants use water for cooling. Water usage occurs through once-through cooling or as make-up water in a closed-cycle system (generally involving one or more cooling towers). According to a U.S. Geological Survey report, the steam electric power industry withdrew about 136 billion gallons per day of fresh water in 2000 (USGS 2005). This is almost the identical volume withdrawn for irrigation purposes. In addition to fresh water withdrawals, the steam electric power industry withdrew about 60 billion gallons per day of saline water. Many parts of the United States are facing fresh water shortages. Even areas that traditionally have had adequate water supplies are reaching capacity limits. New or expanded steam electric power plants frequently need to turn to non-traditional alternate sources of water for cooling. This report examines one type of alternate water source-groundwater collected in underground pools associated with coal mines (referred to as mine pool water in this report). In 2003, the U.S. Department of Energy's (DOE's) National Energy Technology Laboratory (NETL) funded Argonne National Laboratory (Argonne) to evaluate the feasibility of using mine pool water in Pennsylvania and West Virginia. That report (Veil et al. 2003) identified six small power plants in northeastern Pennsylvania (the Anthracite region) that had been using mine pool water for over a decade. It also reported on a pilot study underway at Exelon's Limerick Generating Station in southeastern Pennsylvania that involved release of water from a mine located about 70 miles upstream from the plant. The water flowed down the Schuylkill River and augmented the natural flow so that the Limerick plant could withdraw a larger volume of river water. The report also included a description of several other proposed facilities that were planning to use mine pool water. In early 2006, NETL directed Argonne to revisit the sites that had previously been using mine pool water and update the information offered in the previous report. This report describes the status of mine pool water use as of summer 2006. Information was collected by telephone interviews, electronic mail, literature review, and site visits.

  4. Analysis of HLA-DP association with beryllium disease susceptibility in pooled exposed populations

    SciTech Connect (OSTI)

    Cesare Saltini, Massimo Amicosante

    2009-12-19T23:59:59.000Z

    Berylliosis or Chronic Beryllium Disease is a chronic granulomatous disorder primarily involving the lung associated with the exposition to low doses of Beryllium (Be) in the workplace. Berylliosis risk has been associated with the presence of a glutamate at position 69 of the HLA-DP beta chain (HLA-DPbetaGlu69) that is expressed in about 97% of disease cases and in 27% of the unaffected Be-exposed controls (p<0.0001) (Richeldi et al. Science 1993; 262: 242-244.12). Since this first observation of an immunogenetic association between berylliosis and HLA-DPbetaGlu69 a number of studies have confirmed the role of this marker as the primary gene of susceptibility of berylliosis (Richeldi et al Am J Ind Med. 1997; 32:337-40; Wang et al J. Immunol. 1999; 163: 1647-53; Saltini et al Eur Respir J. 2001 18:677-84; Rossman et al Am J Respir Crit Care Med. 2002 165:788-94). Moreover, a structure/function interaction between HLA-DP molecules carrying Glu69 and beryllium in driving and developing the immune response against beryllium itself has been observed as: (1) Be-specific T-cells clones obtained from berylliosis patients recognize beryllium as antigen only when presented in the context of the HLA-DP{beta}Glu69 molecules but not in the context of HLA-DP allelic variants carrying Lys69 (Lombardi G et al. J Immunol 2001; 166: 3549-3555), and (2) beryllium presents an affinity for the HLA-DP2, carrying the berylliosis marker of susceptibility HLA-DPGlu69, from 40 to 100 times higher that the HLA-DP molecule carrying Lys69 (Amicosante M. et al Hum. Immunol. 2001; 62: 686-93). However, although the immunogenetic studies performed have been addressed a number of different questions about the genetic association between berylliosis and/or beryllium sensitization, exposure levels to beryllium and HLA markers, a number of questions are still open in the field mainly due to the limitation imposed by the low number of subjects carrying berylliosis or beryllium sensitization enrolled in each immunogenetic study. In this context, the populations of the study already performed in this field by the University of Modena and Rome (by Prof. C. Saltini) and the University of Pennsylvania (by Prof. M. Rossman) have been evaluated by using similar HLA molecular typing methodologies and that both populations have now been followed up for a period of 4 to 7 years. The general objective of this study has to generate a larger data base comprising the two population with which analyze gene disease association with greater statistical power and ascertain the effect of lesser common gener variants which may be missed when analyzing associations on small populations. In particular addressing the role suggested in previous study such as: (1) the role of HLA-DP rare alleles and polymorphisms, and (2) the role of the HLA markers in disease progression from sensitization. The two populations from the already published studies (Saltini et al Eur Respir J. 2001 18:677-84; Rossman et al Am J Respir Crit Care Med. 2002 165:788-94) present similar aspects about: ethnicity, type and length of exposure to Be dust, a broadly similar association between beryllium related abnormalities and HLA. The two population have been pooled and evaluated using common criteria of diagnosis (Sensitized subject: at least 2 positive BeLPT tests each with 2 positive wells; CBD-affected subject: identification of well formed non-caseating granulomas on biopsy), follow up and HLA typing technique (complete HLA-DRB, DQB, DPB high resolution typing using amplification with sequence specific primers or sequence based typing). The two populations included 137 subjects with Beryllium hypersensitized (BH) and 155 Be-exposed controls. Inclusion criteria were met by one hundred and six subjects with Be-hypersensitivity of whom 55 were affected by CBD (age 52 {+-} 11 years; 50 caucasians, 2 African-Americans 2 Hispanics and 1 Asian; 46 males and 9 females; mean duration of Be-exposure 15 {+-} 9 years) and 51 showed Be-sensitization without lung granulomas detected by trans-bronchial biopsy (ag