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Adventures in maceral separation

Description: Progress has been made in recent years in the science of maceral separation. However, there are many areas that can be improved and new areas investigated. Power of density gradient centrifugation to physically resolve macerals and submaceral species coupled with other instrumental techniques is attractive for defining the limits of coal heterogeneity as well as investigating the ability of other separation methods.
Date: February 1, 1994
Creator: Dyrkacz, G. R.
Item Type: Refine your search to only Article
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.
Item Type: Refine your search to only Report
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.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A perspective on the status of coal research from shipments of samples

Description: Research on all aspects of coal research, at least for more small scale work, involves the use of samples at the beginning of experimental work. Most research workers for smaller scale work do not collect their own coal samples, but rather order them from a group of sample suppliers. The number of suppliers meeting the major needs in the US, as well as for the world, is not very large. An examination of the shipments of samples from each of these suppliers will give an interesting insight into … more
Date: December 31, 1993
Creator: Vorres, K. S.; Kruse, C. W.; Nater, K. A.; Glick, D. C. & Davis, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Biodegradation of naphthalene from coal tar. Research progress report

Description: Biodegradation experiments were conducted to evaluate the mineralization of naphthalene released from coal tar entrapped in microporous silica media. Tests were performed with two coal tars recovered from former manufactured gas plant sites. Results from these tests showed that the degradation end point for naphthalene was significantly lower than the total amount of naphthalene present in coal tar. The role of physico-chemical and biological processes on the rate of biotransformation of naphth… more
Date: February 7, 1994
Creator: Ghoshal, S.; Ramaswami, A. & Luthy, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Maintenance of the coal sample bank and database. Quarterly technical progress report, September 29, 1993--December 28, 1993

Description: This five year project is intended to ensure the availability of well-characterized, high-quality coal samples for public and private coal research. It continues support of the DOE Coal Sample Bank and Database at The Pennsylvania State University. Thirty coal samples will be collected, processed, packaged, and analyzed, and a resulting database will be maintained. These samples and data, as well as 26 samples collected under previous contracts, will be distributed to DOE contractors and others… more
Date: February 24, 1994
Creator: Davis, A. & Glick, D. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of coal structure. Quarterly report, July 1, 1993--September 30, 1993

Description: The objective of this project is to investigate the physical structure of coal: the extent to which coal molecules may be covalently cross-linked and/or physically associated. Coal structure should be well understood for its effective utilization, and better understanding of physical structure of coal is the first step for the development of coal utilization. Solvent swelling of coal and multistep sequences of extraction are the two main probes of investigation. No single solvent appears to dis… more
Date: October 1, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of coal particles using rule base on-line image analysis. Technical report, March 1, 1994--May 31, 1994

Description: In the past, an in-depth database of the light reflectance characteristics of different materials in coal has been established. This process is still being continued to extend the database of coal images. Based on the grey level database of the ultrafine coal particles under microscope, a C-language computer program has been developed. This program reads an image and analyzes it according to the database and decision-making criteria developed for differentiating coal particles. The earlier vers… more
Date: September 1, 1994
Creator: Yen, S. C. M. & Chu, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of coal particles using rule base on-line image analysis. [Quarterly] technical report, December 1, 1993--February 28, 1994

Description: Different materials in coal reflect light in a different manner and, therefore, can be identified based on their image of light reflectance characteristics (i.e. shade of gray). Furthermore, liberated and nonliberated pyrite particles are surrounded by media of different shades of gray. With these two pieces of information, the degree of pyrite liberation and the degree of purity of coal macerals can be analyzed through a computer program. Ultimately, this image analysis computer program will a… more
Date: June 1, 1994
Creator: Yen, S. C. M. & Chu, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Vapor pressures and heats of vaporization of primary coal tars. Quarterly technical progress report, January 1, 1994--March 31, 1994

Description: The vapor pressure correlations that exist at present for coal tars are very crude and they are not considered reliable to even an order of magnitude when applied to tars. Sophisticated general correlative approaches are slowly being developed, based upon group contribution methods, or based upon some key functional features of the molecules. These are as yet difficult to apply to coal tars. The detailed group contribution methods, in which fairly precise structural information is needed, do no… more
Date: June 1, 1994
Creator: Suuberg, E. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gas evolution from coal in sealed glass ampoules

Description: Higher rank coals evolve methane, and lower rank coals evolve carbon dioxide with some evolution of both gases for the intermediate ranks. The evolution proceeds over time of years for pulverized coals in sealed ampoules. Gas concentrations are higher above {minus}20 mesh samples than above {minus}100 mesh material. Carbon monoxide is not evolved. The Wyodak sample evolves carbon dioxide approximately linearly with time. The gas evolution sample evolves carbon dioxide approximately linearly wit… more
Date: December 31, 1992
Creator: Vorres, K. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Surface properties of photo-oxidized bituminous coals. Technical progress report, December 1993--March 1994

Description: During the report period, channel and block samples of the Pittsburgh seam (DECS-23) were collected from Consolidation Coal Company`s Bailey Mine and were subsequently processed and partly analyzed. Powdered vitrinite concentrates were prepared from the block samples in a nitrogen-filled glovebox, and small coal blocks containing {approximately}5 mm thick vitrain bands were cut from the larger sections. Results of proximate, ultimate and petrographic analyses showed that the concentrate contain… more
Date: April 1, 1994
Creator: Mitchell, G. & Davis, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Two dimensional NMR and NMR relaxation studies of coal structure. Progress report, July 1, 1992--September 30, 1992

Description: This report covers the progress made on the title project for the project period. Four major areas of inquiry are being pursued. Advanced solid state NMR methods are being developed to assay the distribution of the various important functional groups that determine the reactivity of coals. Special attention is being paid to methods that are compatible with the very high magic angle sample spinning rates needed for operation at the high magnetic field strengths available today. Polarization inve… more
Date: November 25, 1992
Creator: Zilm, K. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The single electron chemistry of coals. [Quarterly], April 1--June 30, 1992

Description: Depolymerization of coals at low temperatures may offer advantages over thermal bond cleavage. Because bond cleavage energies of radical cations are lower than the corresponding homolytic bond cleavage energies of the same bond, generation of radical cations in coal may make possible depolymerization at lower temperatures. We seek to investigate the above possibility using single molecules containing functional groups common in coals. Since the generation of a radical cation requires the remova… more
Date: October 1, 1992
Creator: Larsen, John W. & Eskay, T. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Configurational diffusion of asphaltenes in fresh and aged catalyst extrudates. Quarterly progress report, September 20, 1991--December 20, 1991

Description: The objective of this research is to determine the relationship between the size and shape of coal and petroleum macromolecules and their diffusion rates i.e., effective diffusivities, in catalyst pore structures. That is, how do the effective intrapore diffusivities depend on molecule configuration and pore geometry.
Date: January 21, 1992
Creator: Guin, J. A. & Tarrer, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The role of pore structure on char reactivity. Quarterly progress report, [January--March 1993]

Description: Studies will be conducted on coal chars in the electrodynamic balance to examine the role of mesopore structure on reactivity. Larger particles will also be examined using a fluidized bed to examine diffusion control reactions. Soots will also be investigated to examine the role of meso- and micro-pores without macro-pore interference. These studies will allow a full range of particles sizes and temperatures to be investigated and eventually modelled.
Date: April 1, 1993
Creator: Sarofim, A. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Two dimensional NMR and NMR relaxation studies of coal structure. Progress report, April 1, 1992--June 30, 1992

Description: This report covers the progress made on the title project for the project period. Four major areas of inquiry are being pursued. Advanced solid state NMR methods are being developed to assay the distribution of the various important functional groups that determine the reactivity of coals. Special attention is being paid to methods that are compatible with the very high magic angle sample spinning rates needed for operation at the high magnetic field strengths available today. Polarization inve… more
Date: September 1, 1992
Creator: Zilm, K. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Organic structure components within the Argonne premium coal samples

Description: Several key features are evident from examining the data (desorption electron impact high resolution mass spectrometry) from the Argonne coals. First, the aromatic clusters are not very large. Second, heteroatoms are associated with a majority of the clusters. Finally, we need more quantitative information on the links between clusters.
Date: February 1, 1994
Creator: Winans, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Liquid chromatographic analysis of coal surface properties. Quarterly progress report, July--September 1993

Description: Flotation was carried out on 60-200 mesh Illinois 6 coal, Adaville 1 coal, Wyodak coal, and Pittsburgh 8 coal. (The coals were treated with steam, N{sub 2}, and air at 1 atm, 125-225 C for 24 h.) Flotation of Wyodak coal (N{sub 2} treated) is higher than that of untreated coal. Flotation of Adaville 1 coal (air treated) is slightly higher than untreated, whereas flotation of Adaville 1 coal (air treated) is slightly lower. Flotation of Illinois 6 coal (N{sub 2} treated) is higher than untreated… more
Date: November 1, 1993
Creator: Kwon, K. C. & Rigby, R. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mass spectrometric analytical services and research activities to support coal-liquid characterization research. Quarterly report, June 9, 1976--October 5, 1976. [10 refs]

Description: Low-resolution field ionization and high-resolution 70-eV electron-impact mass spectra data were obtained for 28 GPC fractions acquired from Bartlett, Kansas, heavy petroleum by members of the Separation and Characterization group at the Bartlesville Energy Research Center. This group was supplied with most-probable empirical formulas deduced from the high resolution electron-impact data. Analysis of the qualitative and quantitative analytical data previously obtained for GPC fractions from a S… more
Date: October 19, 1976
Creator: Scheppele, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A new model of coal-water interaction and relevance for dewatering. Quarterly technical progress report, 1 June--31 August, 1992

Description: This project is concerned with a basic scientific question concerning the properties of coal -- to what extent is the ability of coal to hold moisture a manifestation of the well-known ability of coal to swell, when exposed to good solvents? The question implies that the long-held belief that coal holds a significant portion of its moisture by classical capillary condensation processes, is possibly in error. This seems to be a very real possibility for low rank coals- i.e. lignites. To explore … more
Date: December 31, 1992
Creator: Suuberg, E. M.; Yun, Y.; Lilly, W. D.; Leung, K. & Gates, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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