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Further studies of the effects of oxidation on the surface properties of coal and coal pyrite

Description: The objective of this research was to investigate the oxidation behavior of coal and coal pyrite and to correlate the changes in the surface properties induced by oxidation, along with the intrinsic physical and chemical properties of these organic and inorganic materials, with the behavior in physical coal cleaning processes. This provide more fundamental knowledge for understanding the way in which different factors interact in a medium as heterogeneous as coal. Fourteen coal samples of diffe… more
Date: December 31, 1994
Creator: Herrera, Miguel Nicholas
Partner: UNT Libraries Government Documents Department
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Healy Clean Coal Project: Healy coal firing at TRW Cleveland Test Facility. Final report

Description: A test burn of two Alaskan coals was conducted at TRW`s Cleveland test facility in support of the Healy Clean Coal Project, as part of Clean Coal Technology III Program in which a new power plant will be constructed using a TRW Coal Combustion System. This system features ash slagging technology combined with NO{sub x} and SO{sub x} control. The tests, funded by the Alaska Industrial Development and Export Authority (AIDEA) and TRW, were conducted to verify that the candidate Healy station coal… more
Date: August 1, 1991
Creator: Koyama, T.; Petrill, E. & Sheppard, D.
Partner: UNT Libraries Government Documents Department
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CFBC evaluation of fuels processed from Illinois coals. Technical report, September 1, 1991--November 30, 1991

Description: The overall objectives for this one-year project are: (1) to demonstrate that new fuels derived from Illinois high sulfur coal, namely (a) coal-sorbent pellets and (b) coal-water slurry produced from froth flotation feed can be effectively utilized in a circulating fluidized bed combustor, (2) to compare the carbon conversion efficiencies, SO{sub 2} and NO{sub x} emission levels and Ca/S ratios needed to meet EPA regulations from the above fuels with those measured under similar operating condi… more
Date: December 31, 1991
Creator: Rajan, S.
Partner: UNT Libraries Government Documents Department
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Coal-Log Pipeline System Development. Fifth Quarterly Report, August 25, 1991--November 25, 1991

Description: Project tasks include: (1) Perform the necessary testing and development to demonstrate that the amount of binder in coal logs can be reduced to 8% or lower to produce logs with adequate strength to eliminate breakage during pipeline transportation, under conditions experienced in long distance pipeline systems. Prior to conducting any testing and demonstration, grantee shall perform an information search and make full determination of all previous attempts to extrude or briquette coal, upon wh… more
Date: December 1, 1991
Creator: Liu, Henry
Partner: UNT Libraries Government Documents Department
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Development of a Coal Quality Expert. Final technical progress report No. 12, [January 1--March 31, 1993]

Description: During the past quarter, Tasks 3, 4, 5, and 6 were active. Task 3 Pilot Scale Combustion Testing activity included data analysis of pilot- and bench-scale combustion samples in support of the development of CQE slogging and fouling models. Under Task 4, field testing at the fifth host utility site -- New England Power Service Company`s Brayton Point Unit 3 -- was completed in March with the testing of the alternate coal. Test plans were finalized for the sixth and final field test to be perform… more
Date: August 12, 1993
Partner: UNT Libraries Government Documents Department
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Integrated methods for production of clean char and its combustion properties. Technical report, September 1, 1991--November 30, 1991

Description: The overall objective of this two-year program is to produce clean char using an integrated process scheme which combines physical coal cleaning, mild gasification and char oxydesulfurization. Low sulfur chars which could be used in utility boilers to meet 1995 emission standards of 2.5 lbs DO{sub 2}/MMBtu are produced from Illinois coals having emissions of >5 lbs SO{sub 2}/MMBtu. Mild gasification and low temperature oxidation studies for sulfur removal are conducted with selected coals from … more
Date: December 31, 1991
Creator: DeBarr, J. A.
Partner: UNT Libraries Government Documents Department
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Clean coal technology: Export finance programs

Description: Participation by US firms in the development of Clean Coal. Technology (CCT) projects in foreign countries will help the United States achieve multiple national objectives simultaneously--addressing critical goals related to energy, environmental technology, industrial competitiveness and international trade. US participation in these projects will result in an improved global environment, an improvement in the balance of payments and an increase in US jobs. Meanwhile, host countries will benef… more
Date: September 30, 1993
Partner: UNT Libraries Government Documents Department
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Semiconductor electrochemistry of coal pyrite. Technical progress report, July--September 1992

Description: The kinetics of the formation of Fe(HS){sup 2}-n{sub n,} the intermediate in the formation of FeS (from the reaction between aqueous sulfide ions and dissolved FE(II) salts) was studied with a stopped-flow spectrophotometric technique. As described in the previous report, the absorbance-time curve indicated that a black substance formed within the first few seconds of the reaction; this material subsequently decomposed gradually to give a lighter dark product within the following several minute… more
Date: December 31, 1992
Creator: Osseo-Asare, K. & Wei, D.
Partner: UNT Libraries Government Documents Department
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Graphic values for some organic constituents of beneficiated coal samples. [Final] technical report, September 1, 1991--August 31, 1992

Description: Graphic techniques exist which can accurately predict values for calorific value, organic sulfur, and several other constituents of the organic portion of beneficiated coal sample fractions. These techniques also permit a determination of coal rank to be made without the use of approximations required in the standard procedure. In beneficiation studies, plots of the calorific value of each fraction vs its ash content invariably produce straight lines. The Y axis intercept is the mineral-matter-… more
Date: December 31, 1992
Creator: Kohlenberger, L. B.; Lytle, J. M.; Kruse, C. W. & Chaven, C.
Partner: UNT Libraries Government Documents Department
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Characterization of the surface properties of Illinois Basin Coals. Technical report, September 1--November 30, 1991

Description: The overall objective of this research project is to provide fundamental data on the physical and chemical surface properties of Illinois coals, specifically those of the Illinois Basin Coal Sample Program (IBCSP). This will help coal researchers achieve an optimal match between Illinois Basin coals and potential coal cleaning and conversion processes (or at least reduce the number of coals suitable for a particular process) and may lead to improved desulfurization and increased utilization of … more
Date: December 31, 1991
Creator: Demir, I.
Partner: UNT Libraries Government Documents Department
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Rheology of coal-water slurries prepared by the HP roll mill grinding of coal. Quarterly technical progress report No. 4, June 1--August 1993

Description: During the Fourth Quarter, we studied the effect of the initial mixing procedure in the preparation of coal-water slurries, the storage time of ground coal samples, and the addition of anionic surfactants such as 2-TEPA on the rheology of coal-water slurries. The details of these studies are presented in the following paragraphs.
Date: September 1, 1993
Creator: Fuerstenau, D. W.
Partner: UNT Libraries Government Documents Department
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Development of the chemical and electrochemical coal cleaning process. First quarterly technical progress report, April 1, 1988--June 30, 1988

Description: The objectives of this effort are (a) to learn the mechanisms by which the Chemical and Electrochemical Coal Cleaning (CECC) process removes pyritic sulfur and ash from coal, (b) to learn more about the operating parameters of the process, (c) to collect engineering information for scale-up of the process, and (d) to test the CECC process on a bench-scale continuous operation.
Date: December 31, 1988
Creator: Yoon, R. H.
Partner: UNT Libraries Government Documents Department
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Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants. Technical Progress Report, [Period Ending December 31, 1987]

Description: This is the first quarterly report of DOE/PETC Contract No. DE-AC22-87PC79864, entitled, ``Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants.`` Refining, creating, and documenting of computer models concerning coal/flue gas cleaning and desulfurization are discussed. (VC)
Date: January 1, 1988
Creator: Rubin, E. S.
Partner: UNT Libraries Government Documents Department
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Refining of fossil resin flotation concentrate from Western coal. Second quarterly final report, April 1, 1993--June 30, 1993

Description: Ultimate analysis was conducted for the fossil resin concentrate and results obtained are given in Table 2. Based on these results and other results from spectroscopic analysis it appears that the fossil resin from the Wasatch Plateau coal field consists mainly of aliphatic components and partially aromatized multicyclic terpenoids with a few oxygen functional groups. As compared with the parent high volatile bituminous coal, the resin has higher hydrogen and carbon content, low oxygen, nitroge… more
Date: July 10, 1993
Creator: Jensen, G. F. & Miller, J. D.
Partner: UNT Libraries Government Documents Department
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Combustion characterization of the blend of plant coal and recovered coal fines. Technical report, September 1--November 30, 1991

Description: The overall objective of this proposed research program is to determine the combustion characteristics of the blend derived from mixing a plant coal and recovered and clean coal fines from the pond. During this study, one plant coal and three blend samples will be prepared and utilized. The blend samples will be of a mixture of 90% plant coal + 10% fines, 85% plant coal + 15% fines, 80% plant coal + 20% fines having particle size distribution of 70% passing through {minus}200 mesh size. These s… more
Date: December 31, 1991
Creator: Singh, Shyam
Partner: UNT Libraries Government Documents Department
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Clean, premium-quality chars: Demineralized and carbon enriched. Final technical report, 1 September, 1992--31 August, 1993

Description: The overall objective of this two-year project was to evaluate methods of preparing demineralized and carbon enriched chars from Illinois Basin coals. The two processing steps, physical cleaning and devolatilization under different environments, led to the following results. Cleaning coal incompletely removes mineral matter which decreases catalytic activity and increases micropore structure. Water forms hydrogen bonds to oxygen functional groups in coal, and during drying, coals undergo struct… more
Date: December 31, 1993
Creator: Smith, G. V.; Malhotra, V. M. & Wiltowski, T.
Partner: UNT Libraries Government Documents Department
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Improved maceral separation method using a continuous flow centrifuge

Description: A new procedure was developed to provide gram to kilogram amounts of highly enriched coal macerals using continuous flow centrifuges. Ninefold enrichments were routinely obtained for various macerals. In addition to the development of a practical technique for large bench-top maceral separations, this work, funded by the DOE Division of Chemical Sciences, has enabled a richer insight into the dynamics of continuous flow centrifuges. At the same time, Dr. Gary R. Dyrkacz and Carol A. A. Bloomqui… more
Date: March 1, 1994
Creator: Dyrkacz, G. R. & Bloomquist, C. A. A.
Partner: UNT Libraries Government Documents Department
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Selective flotation of fossil resin from Western coal. Final report, July 1, 1990--May 25, 1992

Description: The proof-of-concept test program was designed to clarify a number of concerns that have been raised by coal companies who own the valuable resin resource. First, from laboratory bench-scale flotation experiments, a froth product from cleaner flotation containing more than 80% hexane-extractable resin at higher than 80% recovery can be produced. Pilot-plant testing was initiated to demonstrate the selective flotation of fossil resin and to establish a better confidence level in the new technolo… more
Date: May 25, 1992
Creator: Jensen, G. F. & Miller, J. D.
Partner: UNT Libraries Government Documents Department
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PETC Review, Issue 1, March 1990

Description: This issue of PETC Review contains short discussion on the following topics: (1)``SO{sub 2} Control and Duct Injection: A Solution to Acid Rain``--research on duct injection; (2)``Acid Rain Abatement and Advanced Coal Cleaning: A Precombustion Option``--research on selective agglomeration and advanced froth flotation; (3)``Two-Stage Liquefaction of Coal``--PETC`s efforts to further the viability of this technology; (4)``Clean Coal Technology: Energy and the Environment``--the Clean Coal Technol… more
Date: March 1, 1990
Creator: Blaustein, B.; Reiss, J.; Martin, G.; Hammer, D. & Mills, J.
Partner: UNT Libraries Government Documents Department
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CE IGCC repowering project: Controls & instrumentation. Topical report, June 1993

Description: The IGCC Control System is used to provide operator interface and controls for manual and auto operation of the IGCC Repowering Project Located at Springfield, Illinois. A Distributed Control System (DCS) is provided for analog (process control) loop functions and to provide the operator interface. A Data Acquisition System (DAS) is provided for gathering performance data and optimization. Programmable Logic Controllers will be provided for the following digital control systems: (a) GSSS (Gasif… more
Date: December 1, 1993
Partner: UNT Libraries Government Documents Department
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Development of an on-line image analysis for assessment of pyrite liberation. Technical report, December 1, 1992--February 28, 1993

Description: An automation procedure based on the principles of image processing is proposed to perform the analysis of pyrite/minerals liberation of coal. To make the automated image analysis system possible, a data base of the light reflectance characteristics of different coal constituents must be established. Characterization of coal images through the analysis of their histogram was conducted. In general, it was found that the distinction of coal particles or particle groups may be accomplished by dete… more
Date: May 1, 1993
Creator: Yen, M. S. C.; Chu, P. T. C. & Ho, K.
Partner: UNT Libraries Government Documents Department
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Low-rank coal research semiannual report, January 1992--June 1992

Description: This semiannual report is a compilation of seventeen reports on ongoing coal research at the University of North Dakota. The following research areas are covered: control technology and coal preparation; advanced research and technology development; combustion; liquefaction and gasification. Individual papers have been processed separately for inclusion in the Energy Science and Technology Database.
Date: December 31, 1992
Partner: UNT Libraries Government Documents Department
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Fossil energy: From laboratory to marketplace. Part 2, The role of advanced research

Description: The purpose of this work is to provide a summary description of the role of advanced research in the overall Fossil Energy R&D program successes. It presents the specific Fossil Energy advanced research products that have been adopted commercially or fed into other R&D programs as part of the crosscutting enabling technology base upon which advanced systems are based.
Date: March 1, 1992
Partner: UNT Libraries Government Documents Department
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Catalytic Two-Stage Liquefaction (CTSL) process bench studies with bituminous coal. Final report, [October 1, 1988--December 31, 1992]

Description: Reported herein are the details and results of Laboratory and Bench-Scale experiments using bituminous coal concluded at Hydrocarbon Research, Inc., under DOE contract during the period October 1, 1988 to December 31, 1992. The work described is primarily concerned with the application of coal cleaning methods and solids separation methods to the Catalytic Two-Stage Liquefaction (CTSL) Process. Additionally a predispersed catalyst was evaluated in a thermal/catalytic configuration, and an alter… more
Date: March 1, 1993
Creator: Comolli, A. G.; Johanson, E. S.; Karolkiewicz, W. F.; Lee, L. K.; Stalzer, R. H. & Smith, T. O.
Partner: UNT Libraries Government Documents Department
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