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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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Advanced thermally stable jet fuels. Technical progress report, February 1993--March 1993

Description: This project was initiated on August 1, 1992. The starting date resulted in this project being one month out of synchronization with the normal quarterly calendar (i.e., January, April, July, and October). On advice of Mr. John Augustine, DOE/PETC, the present report is prepared to cover only two months work, so that future quarterly reports will be aligned with the conventional reporting schedule. A significant pressure dependence was observed for the pyrolysis of n-tetradecane at 450{degree}C… more
Date: July 1, 1993
Creator: Schobert, H. H.; Eser, S.; Song, C.; Hatcher, P. G.; Walsh, P. M. & Coleman, M. M.
Partner: UNT Libraries Government Documents Department
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Establishment and maintenance of a Coal Sample Bank and data base. Project status report, July 9, 1992--October 8, 1992

Description: During the period 7/9/92-10/8/92 a total of 80 samples (30 DOE Sample Bank samples and 50 other Penn State samples) of various sizes, not including DECS-17, were distributed. Fifteen of these samples were provided to DOE contractors. Six orders for a total of 80 30-gram bags of DECS-17 have been filled. All of these bags have been distributed to DOE dispersed catalyst contractors or those approved by DOE to receive the samples. A total of 188 data printouts were distributed. In addition, 15 spe… more
Date: November 23, 1992
Creator: Davis, A.
Partner: UNT Libraries Government Documents Department
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Chemistry of coal-related microparticles. [Quarterly report], 1 July 1991--31 September 1991

Description: The objective of this research is to develop and apply novel single microparticle techniques to perform simultaneously thermogravimetric analysis and Raman/fluorescence spectroscopies on microparticles of coal (macerals) and sorbents (CaO) used for coal desulfurization. The combination electrodynamic balance/spectrometer system is being used to chemically characterize macerals from different ranks of coal and to explore the chemistry and chemical reaction rates associated with processes involvi… more
Date: December 31, 1991
Creator: Davis, E. J. & Krieger-Brockett, B.
Partner: UNT Libraries Government Documents Department
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Thermal conductivity of coal ashes and slags

Description: Generally, heat in solids is conducted by the free electrons in metals and alloys at low temperatures, by thermal vibrations of atoms that are observed in the stoichiometric dielectrics, by the free electrons and holes as well as lattice vibrations at the sufficiently high temperatures recorded in semiconductors, and also by ions in amorphous materials at high temperatures. In our case, the linear variations of both thermal and electrical conductivities suggest also that ionization of point def… more
Date: December 1, 1992
Creator: Steadman, E. N.; Benson, S. A. & Nowok, J. W.
Partner: UNT Libraries Government Documents Department
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Mulled coal---A beneficiated coal form for use as a fuel or fuel intermediate. Final technical progress report No. 3, October 1, 1990--December 31, 1990

Description: The storage, transport and handling of beneficiated coals in the form of a modified wet cake (``mulled coal``) to yield a coal water fuel having acceptable properties for atomization and combustion on industrial, commercial and/or residential scales, have been investigated. The Mulled Coal project is divided into a series of tasks designed to produce formulations and system designs suitable to convert fine coal ``wet cakes`` into a material that can be stored, handled, and transported to a site… more
Date: May 1, 1991
Partner: UNT Libraries Government Documents Department
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Changes in Organic Sulfur Compounds in Coal Macerals During Liquefaction

Description: Several general trends were observed in reactivity patterns of sulfur compounds in macerals. Sulfur is reduced in the asphaltene fraction compared to initial maceral. Aliphatics are removed and polycyclic aromatic compounds are both stable and probably formed under these conditions. Molecules containing two sulfur atoms are formed. The preasphaltenes are now being analyzed by DEIHRMS.
Date: February 1, 1994
Creator: Winans, R. E.; Joseph, J. T. & Fisher, R. B.
Partner: UNT Libraries Government Documents Department
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Multiple-use marketing of lignite

Description: Marketing of lignite faces difficulties due to moisture and sulfur contents, as well as the sodium content, of the ash. The purpose of this study is to determine the economic viability of multiple-use marketing of lignite as a method to increase the use of North Dakota lignite by recapturing lost niche markets. Multiple-use marketing means using lignite and sulfur-capturing additives to clean agricultural wastewater followed by either direct steam and power generation or briquetting to produce … more
Date: September 1, 1993
Creator: Knudson, C. L.
Partner: UNT Libraries Government Documents Department
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Fundamental Studies of Water Pretreatment of Coal. Seventh Quarterly Report, April 1, 1991--June 30, 1991

Description: During the seventh quarter, water pretreatment experiments were done at lower pressures (1000 psig), with early H{sub 2}O injection or continuous H{sub 2}O injection, and with demineralized coals. In addition, a set of blank experiments was done with all four coals in helium at the following conditions: 350{degrees}C; 4000 psig; 20 minutes. An additional experiment was done with the Zap lignite at atmospheric pressure. Helium was used instead of nitrogen since it can be obtained in highly pure … more
Date: October 25, 1991
Creator: Serio, M. A.; Solomon, P. R.; Kroo, E.; Charpenay, S. & Bassilakis, R.
Partner: UNT Libraries Government Documents Department
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New generation of group contribution and equation-of-state models. Annual report, 1992

Description: A major activity of the past year was research on equation of state parameter mixing rules in order to be applicable to complex mixtures which heretofore could only be described by activity coefficient models. Work on the UNIFAC/association model (group contribution methods) and on chain molecules and polymers is described. A new viscosity model was developed for hydrocarbons and petroleum reservoir fluids.
Date: December 31, 1992
Creator: Sandler, S. I.
Partner: UNT Libraries Government Documents Department
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Advanced Nmr Approaches in the Characterization of Coal. [Quarterly] Report No. 8

Description: The paper submitted earlier on the use of (bicyclo[3.2.1]4pyrrolidino-N-methyl-octan-8-one triflate) ({sup 13}CO-123) as a {sup 13}C intensity standard was accepted for publication. Subsequently, {sup 13}CO-321 was used in this manner for quantitative {sup 13}C CP-MAS NMR analysis (including spin counting) of Argonne Premium coals. The cross-polarization time constants, T{sub CH}, and the rotating-frame proton spin-lattice relaxation times, T{sub 1p}{sup H}, were determined for each major peak … more
Date: December 31, 1992
Creator: Maciel, G. E.
Partner: UNT Libraries Government Documents Department
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VHF EPR determination of the chemical forms of organic sulfur in coal. Final technical report, September 1, 1990--August 31, 1991

Description: This program addresses the need for innovative approaches to characterize the organic sulfur in Illinois Basin coals. We have developed a very high frequency electron paramagnetic resonance (EPR) spectrometer operating at the W-band of microwave frequencies (96 GHz). This instrument has shown unique sensitivity to heteroatoms in coal, and we believe the technique can be successfully applied for the non-destructive, direct determination of organic sulfur in coal. Preliminary data from Illinois c… more
Date: December 31, 1991
Creator: Clarkson, R. B.
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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Coal liquefaction process streams characterization and evaluation: The application of {sup 252}Cf-plasma desorption mass spectrometry to analysis of direct coal liquefaction heavy products

Description: This study demonstrated the feasibility of using {sup 252}Cf PDMS, GPC, and MPLC for the examination of the tetrahydrofuran (THF)-soluble portion of distillation resid materials derived from direct coal liquefaction. The {sup 252}Cf-PDMS technique was used to determine molecular weight distributions of twenty-five THF-soluble resids. In order to detemine if {sup 252}Cf-PDMS responds differently to different chemical classes of compounds, Lehigh separated five of the samples into chemically dist… more
Date: October 1, 1992
Creator: Larsen, J. W. & Lapucha, A. R.
Partner: UNT Libraries Government Documents Department
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Fundamental mechanisms in flue gas conditioning. Quarterly report, July 1992--September 1993

Description: As suggested by our literature review, our data indicate that water adsorption depends on particle morphology and surface chemistry. Our recent laboratory efforts were directed primarily toward the determination of the effects of adsorbed water on the tensile and cohesive strengths of powders, and the conditioning of powders and ashes with SO{sub 3} and organosiloxane. Details of these conditioning methods are discussed under section 3.5.
Date: October 26, 1993
Creator: Snyder, T. R.
Partner: UNT Libraries Government Documents Department
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Cooperative research on the combustion characteristics of cofired desulfurized Illinois coal and char with natural gas. Final technical report, September 1, 1991--August 31, 1992

Description: The DTFF is extended to larger sample collecting capability and higher temperatures, resulting in the establishment of the Ash Characterization Facility and the High Temperature Drop Tube Furnace. The Ash Characterization Facility enables continuous coal injection and sampling under controlled conditions. Several hundred milligrams of char or ash can be collected in one-half hour. The High Temperature Drop Tube Furnace uses a plasma torch to preheat the gas to over 2000 K and inject it into a c… more
Date: December 31, 1992
Creator: Buckius, R. O.; Wu, Cheng-Kang; Krier, H. & Peters, J. E.
Partner: UNT Libraries Government Documents Department
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High temperature alkali corrosion of ceramics in coal gas. Quarterly progress report {number_sign}9: September 1--December 1, 1993

Description: High temperature alkali corrosion has been known to cause premature failure of ceramic components used in advanced high temperature coal combustion systems such as coal gasification and clean-up, coal fired gas turbines, and high efficiency heat engines. The objective of this research is to systematically evaluate the alkali corrosion resistance of the most commonly used structural ceramics including silicon carbide, silicon nitride, cordierite, mullite, alumina, aluminum titanate, zirconia, an… more
Date: December 1, 1993
Creator: Pickrell, G. R.; Sun, T. & Brown, J. J.
Partner: UNT Libraries Government Documents Department
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Coal liquefaction process streams characterization and evaluation. Quarterly technical progress report, October 1--December 31, 1992

Description: The Research and Development Department of CONSOL Inc. is conducted a program to characterize process and product streams from direct coal liquefaction process development projects sponsored by the Department of Energy. In this program, CONSOL obtains samples from current process development activities in coal liquefaction and coal-oil coprocessing, and characterizes them using established analytical techniques. In addition, selected samples are characterized by other analytical techniques to e… more
Date: October 1, 1993
Creator: Brandes, S. D.; Winschel, R. A.; Burke, F. P. & Robbins, G. A.
Partner: UNT Libraries Government Documents Department
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Measurement and Modeling of Advanced Coal Conversion Processes. 23rd Quarterly Report, April 1, 1992--June 30, 1992

Description: The overall objective of this program is the development of predictive capability for the design, scale up, simulation, control and feedstock evaluation in advanced coal conversion devices. This technology is important to reduce the technical and economic risks inherent in utilizing coal, a feedstock whose variable and often unexpected behavior presents a significant challenge. This program will merge significant advances made at Advanced Fuel Research, Inc. (AFR) in measuring and quantitativel… more
Date: December 31, 1992
Creator: Solomon, P. R.; Serio, M. A.; Hamblen, D. G.; Smoot, L. D. & Brewster, B. S.
Partner: UNT Libraries Government Documents Department
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Hydrothermal Pretreatment of Coal. Quarterly Report No. 4, July 16--October 15, 1990

Description: During this period we studied the effects of 350{degrees}C treatment on Argonne-supplied Wyodak coal with n-alkane undecane in place of water in both 30 min. and 5 hr. experiments. Undecane was chosen because it has a critical temperature of 363{degrees}C (calculated), similar to that for water, and is present as a liquid phase at conditions. We anticipated results little different from those from the simple thermal treatment (coal under N{sub 2}) at the same conditions. In that case we had fou… more
Date: January 3, 1991
Creator: Loo, Bock & Ross, David S.
Partner: UNT Libraries Government Documents Department
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Oil shale, tar sand, coal research, advanced exploratory process technology jointly sponsored research. Quarterly technical progress report, April--June 1992

Description: Accomplishments for the quarter are presented for the following areas of research: oil shale, tar sand, coal, advanced exploratory process technology, and jointly sponsored research. Oil shale research includes; oil shale process studies, environmental base studies for oil shale, and miscellaneous basic concept studies. Tar sand research covers process development. Coal research includes; underground coal gasification, coal combustion, integrated coal processing concepts, and solid waste manage… more
Date: December 1, 1992
Partner: UNT Libraries Government Documents Department
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Analysis of organic sulfur and nitrogen in coal via tandem degradation methods. Final technical report, 1 September 1991--31 October 1992

Description: With the recent increase in concern for environmental issues and the implication of sulfur and nitrogen in coal combustion preducts as prime causes of acid rain, it has become clear that there is an urgent need for alternative methods for determining the nature of organic sulfur and nitrogen compounds in coal. The principal impediment to the molecular characterization of organic sulfur and nitrogen forms in coal is the polymeric nature of coal`s molecular structure, rendering coal insoluble and… more
Date: December 31, 1992
Creator: Kruge, M. A. & Palmer, S. R.
Partner: UNT Libraries Government Documents Department
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Comparison of several contemporary ionization/mass analyzer techniques for large components of complex fossil-derived materials

Description: Coals and coal-derived samples provide a unique mixture for development and comparison of mass spectrometric techniques for high molecular weight analyses. The Argonne Premium Coal samples (APCS) are convenient for assessing classical and novel mass spectrometric techniques. Vacuum pyrolysis mass spectrometry of APCS 4 (Pittsburgh No. 8) has been reported. Alkyl-substituted aromatic compounds and hydroxy- and dihydroxy-substituted aromatic compounds were observed. Newer techniques such as laser… more
Date: February 1, 1995
Creator: Hunt, J. E. & Winans, R. E.
Partner: UNT Libraries Government Documents Department
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Protocols for the selective cleavage of carbon-sulfur bonds in coal. Final technical report, September 1, 1991--August 31, 1992

Description: Summarized in the final technical report for our project ``Protocols for the Selective Cleavage of Carbon-Sulfur Bonds in Coal`` are results of research pertaining to chemical reactions that aim to selectively cleave C-S bonds in model compounds as well as Illinois coal. Removal of the organic sulfur in coal constitutes one of the major challenges facing fossil fuel scientists today. A cost-effective means of desulfurizing Illinois coal is, at present, non-existent. Research in our group aims t… more
Date: December 31, 1992
Creator: Bausch, M.
Partner: UNT Libraries Government Documents Department
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