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Exploratory coprocessing research

Description: The objectives of this project were to (1) study the scope of the beneficial effects of hydrothermal pretreatment of coal on subsequent conversion, (2) identify and study the chemical or physical causes of this effect, and (3) attempt to elucidate the chemistry responsible for any coal-resid synergisms.
Date: September 5, 1991
Creator: Hirschon, A. S.; Tse, D. S.; Malhotra, R.; McMillen, D. F. & Ross, D. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mild pyrolysis of selectively oxidized coals

Description: The primary objective of this study is to investigate the removal organic sulfur from selectively oxidized Illinois coals using mild thermal/chemical processes. Work completed this quarter includes the investigation of the mild pyrolysis of unoxidized coals plus a selection of selectively oxidized coals. In addition the effect of particle size and extent of oxidation on pyrolysis was investigated. Some preliminary data concerning pyrolysis under vacuum and ambient pressure was also obtained. Wo… more
Date: January 1, 1991
Creator: Hippo, E. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mass spectral study of organic sulfur in the polymeric matrix of coal

Description: These experiments will examine the chemical environment of organic sulfur in the polymeric matrix of Illinois coal by novel mass spectrometric techniques: High molecular weight ions from the polymeric coal matrix will be formed by laser desorption and photoionization of powdered coal samples. These ions will be subsequently injected into an ion trap mass spectrometer for single and multiple mass analysis for the identification of sulfur containing moieties in the polymeric matrix. Furthermore, … more
Date: January 1, 1991
Creator: Hanley, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Combustion of Illinois coals and chars with natural gas

Description: There are applications where the combined combustion of coal and natural gas offers potential advantages over the use of either coal or natural gas alone. For example, low volatile coals or low volatile chars derived from treatment or gasification processes can be of limited use during to their poor flammability characteristics. However, the use of natural gas in conjunction with the solid fuel can provide the necessary volatiles'' to enhance the combustion. In addition, natural gas provides a … more
Date: January 1, 1991
Creator: Buckius, R.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The use of FBC wastes in the reclamation of coal slurry solids

Description: Fluidized bed combustion (FBC) is a relatively new technology that is used commercially for the combustion of coal. In Illinois, this technology is valuable because it allows the combustion of Illinois high sulfur coal without pollution of the atmosphere with vast quantities of sulfur oxides. In FBC, coal is mixed with limestone or dolomite either before injection into the combustion chamber or in the combustion chamber. As the coal burns, sulfur in the coal is oxidized to SO{sub 2} and this is… more
Date: January 1, 1991
Creator: Dreher, G.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Two-stage, close coupled catalytic liquefaction of coal. [Catalyst used: Presulfided Shell S-317]

Description: The first calendar quarter of 1991 was a productive period with two bench-scale studies, microautoclave support studies, mini-Process Development Unit (PDU) preparations, and process modelling. Several catalyst presulfiding agents and CO{sub 2} effects upon liquefaction were evaluated in microautoclave scale tests. Dimethyl disulfide will be used for the PDU scale-up based on the results of these tests and prior data. Carbon dioxide appears to enhance coal conversion; however, gas and water yie… more
Date: August 1, 1991
Creator: Comolli, A. G.; Johanson, E. S.; Panvelker, S. V.; Popper, G. A. & Stalzer, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Storage, transportation and atomization of CWF for residential applications

Description: Under a contract with the Department of Energy, Pittsburgh Energy Technology Center (PETC), Tecogen Inc. is developing a coal-water fuel (CWF)-fired advanced combustor for residential applications. In order to bring the technology to the point of commercial readiness expeditiously, it is important to develop components and systems for storage, transportation, and handling of these fuels for end use. This research and development effort is designed to augment the data base on the use of CWF for … more
Date: July 1, 1990
Creator: Breault, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Predictors of plasticity in bituminous coals. Final technical report

Description: A group of 40 hvb coals, mostly from western Kentucky fields, has been examined with regard to ASTM Gieseler plastometric properties. Twenty-nine of these coals have also been studied over a range of temperatures by isothermal Gieseler plastometry. Raw Gieseler data provide melting and coking slopes and readily calculable fluidity spans. Maximum fluidity by slope intersection is a more consistent measure than observed maximum fluidity. Isothermal slopes and maximum fluidities follow Arrhenius t… more
Date: February 1, 1984
Creator: Lloyd, W. G.; Reasoner, J. W.; Hower, J. C.; Yates, L. P.; Clark, C. P.; Davis, E. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Surface electrochemical control for fine coal and pyrite separation

Description: Ongoing work includes the characterization of coal pyrites, the floatability evaluation of typical US coal samples, the flotation behavior of coal pyrites, the electrochemical measurement of the surface properties of coal pyrites, and the characterization of species produced at pyrite surfaces.
Date: January 1, 1990
Creator: Chen, Wanxiong; Hu, Weibai; Wann, Jyi-Perng; Zhu, Ximeng; Bodily, D. M. & Wadsworth, M. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Prediction and Measurement of Entrained Flow Coal Gasification Processes. Interim Report, September 8, 1981-September 7, 1983

Description: This volume reports interim experimental and theoretical results of the first two years of a three year study of entrained coal gasification with steam and oxygen. The gasifier facility and testing methods were revised and improved. The gasifier was also modified for high pressure operation. Six successful check-out tests at elevated pressure were performed (55, 75, 100, 130, 170, and 215 psig), and 8 successful mapping tests were performed with the Utah bituminous coal at an elevated pressure … more
Date: January 31, 1984
Creator: Hedman, P. O.; Smoot, L. D.; Fletcher, T. H.; Smith, P. J. & Blackham, A. U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Surface magnetic enhancement for coal cleaning

Description: The fundamental chemistry for selective adsorption of magnetizing reagent on coal-associated minerals to enhance the magnetic susceptibilities of minerals have been established in Phase I study. The application of the results on coal cleaning is in progress in the Phase II study. Illinois No. 6, Ohio Lower Kittanning, and West Virginia Pocahontas coals have been prepared(simulating the industrial operations) and characterized. The adsorption conditions for {minus}48 mesh ROM coals and flotation… more
Date: January 1, 1989
Creator: Hwang, J. Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Surface magnetic enhancement for coal cleaning

Description: The fundamental chemistry for selective adsorption of magnetizing reagent on coal-associated minerals to enhance the magnetic susceptibilities of minerals have been established in Phase I study. The application of the results to study the feasibility for coal cleaning has been completed in the Phase II study. The most effective approach to clean Illinois No. 6, Ohio Lower Kittanning, and West Virginia Pocahontas coals using the magnetizing method has been determined. Phase III study is in progr… more
Date: January 1, 1990
Creator: Hwang, J. Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of coal hydrogasification processes. Final report

Description: Bechtel Corporation has conducted a program to investigate the operability potential and scaleup feasibility of the Cities Service, Rocketdyne, Pittsburgh Energy Research Center (PERC), and Brookhaven National Laboratory coal hydrogasification processes. A reactor model study has been performed for each of the processes, and a conceptual, full-scale hydrogasification reactor design has been generated. The entrained-downflow reactor systems operate at temperatures up to 2,000/sup 0/F and pressur… more
Date: August 1, 1978
Creator: Epstein, Michael; Chen, Tan-Ping & Ghaly, Mohamed A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of coal oxidation by charged particle activation analysis

Description: The technique of Charged Particle Activation Analysis (CPAA) was applied to study the characteristics of low temperature oxidation of coal. The following parameters were investigated: the kinetics of the adsorption of oxygen containing species; the elemental composition of the oxide layer and how deeply it extends into the particle; and the number of reactive sites on or in the surface. The results of this study are in agreement with those of other laboratories. These are summarized as follows:… more
Date: January 1, 1980
Creator: Schlyer, D. J. & Wolf, A. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Kinetics of coal pyrolysis and devolatilization

Description: Research continued an coal pyrolysis and devolatilization. An experimentally based, conceptual model of the devolatilization of a HV bituminous coal is outlined in this repair. This model contends that the relative dominance of a process type-chemical kinetic, heat transport, mass transport -- varies with the extent of reaction for a given set of heating conditions and coal type and with experimental and with experimental conditions for a given coal types and extent of reaction. The relevant re… more
Date: January 1, 1987
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermoeconomic design optimization of a KRW-based IGCC power plant

Description: This report discussed the cost and efficiency optimization of an integrated gasification-combined-cycle (IGCC) power plant design and the effects of important design options and parameters. Advanced thermoeconomic techniques were used to evaluate and optimize a given IGCC concept which uses Illinois No. 6 bituminous coal, air-blown KRW coal gasifiers, a hot gas cleanup system, and GE MS7001F gas turbines. Three optimal design concepts are presented and discussed in the report. Two of the concep… more
Date: November 1, 1991
Creator: Tsatsaronis, G.; Lin, L.; Pisa, J. & Tawfik, T. (Tennessee Technological Univ., Cookeville, TN (United States). Center for Electric Power)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The effect of selective absorption on coal conversion. [2-t-butyltetralin]

Description: Scope of work: (1) Importance of hydrogen donors in the coal, prepare highly pure 2-t-butyltetralin. Study the conversion of Argonne coals in tetralin and 2-t-butyltetralin and compare the following: conversion to soluble products, product molecular weight distributions, and product structure. Hydrogen donated by both solvents will be measured by gas chromatography and the same technique will be used to establish the amount of dealkylation of 2-t-butyltetralin. Reactions will be run at several … more
Date: July 1, 1991
Creator: Larsen, John W. & Lazarov, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Two-stage, close coupled catalytic liquefaction of coal

Description: Research continued on two-stage close coupled catalytic coal liquefaction. During the second quarter of 1990, experimental studies were carried out in the microautoclave and Bench Units. Updating of the economics of two-stage processing continued as did process modelling activities. Bench-scale operations consisted of the completion of Run 227-66 (CC-8), an OTISCA cleaned coal evaluation, and Run CC-9, a solids separation study of delayed coking. The OTISCA Cleaned Coal Evaluation and Delayed C… more
Date: August 1, 1990
Creator: Comolli, A. G.; Johanson, E. S.; Panvelker, S. V. & Popper, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Integrated production/use of ultra low-ash coal, premium liquids and clean char

Description: This integrated, multi-product approach for utilizing Illinois coal starts with the production of ultra low-ash coal and then converts it to high-vale, coal-derived, products. The ultra low-ash coal is produced by solubilizing coal in a phenolic solvent under ChemCoal{trademark} process conditions, separating the coal solution from insoluble ash, and then precipitating the clean coal by dilution of the solvent with methanol. Two major products, liquids and low-ash char, are then produced by mil… more
Date: January 1, 1991
Creator: Kruse, C.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Storage, transportation, and atomization of CWF for residential applications

Description: The properties and behavior with regard to handling, storage, and atomization in small-scale applications of different coal-water fuels (CWFs) prepared from different parent coals and various beneficiation techniques, were investigated. The CWFs that were prepared included Upper Elkhorn No. 3, Illinois No. 6, and Upper Wyodak coal cleaned by heavy media separation. Also, several CWFs were prepared with Upper Elkhorn No. 3 coal cleaned by heavy media separation with filtration, chemical cleaning… more
Date: June 1, 1991
Creator: Grimanis, M. P. & Breault, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Continuous bench-scale tests to assess METHOXYCOAL process performance

Description: Laboratory-scale research conducted at Southern Illinois University at Carbondale (SIUC) has shown that coal pyrolysis in the presence of CH{sub 4} and small quantities of O{sub 2} (the METHOXYCOAL process) can produce high yields of liquids and valuable chemicals compared to conventional pyrolysis. The addition of MgO, coal ash, and clays have been shown to further enhance coal conversion. The goal of this two-year project is to build upon that laboratory research by conducting continuous benc… more
Date: January 1, 1991
Creator: Knight, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering development of advanced physical fine coal cleaning technologies: Froth flotation

Description: a study conducted by Pittsburgh Energy Technology Center of sulfur emissions from about 1300 United States coal-fired utility boilers indicated that half of the emissions were the result of burning coals having greater than 1.2 pounds of SO{sub 2} per million BTU. This was mainly attributed to the high pyritic sulfur content of the boiler fuel. A significant reduction in SO{sub 2} emissions could be accomplished by removing the pyrite from the coals by advanced physical fine coal cleaning. An e… more
Date: January 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Exploratory coprocessing research

Description: The objectives of this project are to: (1) study the scope of hydrothermal pretreatment of coal on subsequent conversion, (2) identify and study the chemical or physical causes of this effect, and (3) attempt to elucidate the chemistry responsible for any coal-resid synergisms. This project is divided into three tasks. This quarter we concentrated on Tasks 1 and 2. Task 1: Scope of aqueous pretreatment. Task 2: Chemistry of Pretreatment. Also during this quarter we investigated other means of p… more
Date: November 2, 1990
Creator: Hirschon, A. S.; Tse, D. S.; Malhotra, R.; McMillen, D. F. & Ross, D. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Selective flotation of fossil resin from Western coal

Description: Technical activities for the fourth quarter involved efforts by both the University of Utah and Advanced Processing Technologies, Inc. Laboratory research at the University of Utah was primarily concerned with surface chemistry/resin characterization, which has emphasized Fourier transform infrared analysis in the past quarter. APT's major activities included proof-of-concept plant testing of the fossil resin flotation circuit. (VC)
Date: October 15, 1991
Creator: Jensen, G. F. & Miller, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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