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COMPCOAL{trademark}: A profitable process for production of a stable high-Btu fuel from Powder River Basin coal

Description: Western Research Institute (WRI) is developing a process to produce a stable, clean-burning, premium fuel from Powder River Basin (PRB) coal and other low-rank coals. This process is designed to overcome the problems of spontaneous combustion, dust formation, and readsorption of moisture that are experienced with PRB coal and with processed PRB coal. This process, called COMPCOAL{trademark}, results in high-Btu product that is intended for burning in boilers designed for midwestern coals or for… more
Date: October 1, 1994
Creator: Smith, V. E. & Merriam, N. W.
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. Quarterly Technical Progress Report No. 11, April 1, 1991--June 30, 1991

Description: This document a quarterly report prepared in accordance with the project reporting requirements covering the period from July 1, 1992 to September 30, 1992. This report provides a summary of the technical work undertaken during this period, highlighting the major results. A brief description of the work done prior to this quarter is provided in this report under the task headings. The overall project scope of the engineering development project is to conceptually develop a commercial flowsheet … more
Date: December 31, 1991
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. Quarterly Technical Progress Report No. 13, October 1, 1991--December 31, 1991

Description: Work completed produced the criteria for additional engineering analysis, computation and detailed experimental benchscale testing for areas of uncertainty. The engineering analysis, computation, bench-scale testing and component development was formulated to produce necessary design information to define a commercially operating system. In order to produce the required information by means of bench-scale testing and component development, a uniform coal sample was procured. After agreement wit… more
Date: February 12, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical Standards for Trace Elements in Petroleum Products

Description: Report discussing a search conducted for stable, oil-soluble, organic compounds of metals (and other elements) for use in the spectrographic analysis of petroleum products. Compounds having suitable physical properties have been selected as standards. Methods are given for preparation of the compounds and for the spectrographic and chemical analysis of the chosen standards. Procedures are described for the preparation of stable solutions thereof in petroleum oils.
Date: October 1, 1962
Creator: Isbell, H. S.; Tipson, R. Stuart; Hague, J. L.; Scribner, B. F.; Smith, W. Harold; Wade, Clarence W. R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization and supply of coal based fuels. Volume 1, Final report and appendix A (Topical report)

Description: Studies and data applicable for fuel markets and coal resource assessments were reviewed and evaluated to provide both guidelines and specifications for premium quality coal-based fuels. The fuels supplied under this contract were provided for testing of advanced combustors being developed under Pittsburgh Energy Technology Center (PETC) sponsorship for use in the residential, commercial and light industrial (RCLI) market sectors. The requirements of the combustor development contractors were s… more
Date: June 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Survey study of low-expanding high-melting, mixed oxides

Description: Approximately 40 mixed oxide materials were prepared and characterized primarily as to their thermal expansion and meltingpoint behavior. Of particular interest were those materials which were stable, had melting points in excess of 1,400 deg C, and had low thermal expansions. (auth)
Date: February 14, 1974
Creator: Holcombe, C. E.; Morrow, M. K.; Smith, D. D. & Carpenter, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Large scale molecular dynamics modeling of materials fabrication processes

Description: An atomistic molecular dynamics model of materials fabrication processes is presented. Several material removal processes are shown to be within the domain of this simulation method. Results are presented for orthogonal cutting of copper and silicon and for crack propagation in silica glass. Both copper and silicon show ductile behavior, but the atomistic mechanisms that allow this behavior are significantly different in the two cases. The copper chip remains crystalline while the silicon chip … more
Date: February 1, 1994
Creator: Belak, J.; Glosli, J. N.; Boercker, D. B. & Stowers, I. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Semiconductor electrochemistry of coal pyrite. Technical progress report, January--March 1994

Description: Eletrochemical and photoelectrohemical experiments have been conducted with synthetic pyrite particles as microelectrodes. The photocurrent collection experiments show that the photocurrent increases dramatically when the particles of pyrite are irradiated by light. It is believed that the increase of the photocurrent results from the increase of the electron concentration in the conduction band of pyrite under illumination. Polarization experiments show that the anodic currents increase under … more
Date: May 1, 1994
Creator: Osseo-Asare, K. & Wei, Dawei
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal oxidation and its effect on oil agglomeration

Description: Small particles of high volatile bituminous coal from two different sources were oxidized by air at 150 C for up to 72 hrs. As the treatment progressed, samples of coal were recovered and characterized by measuring the heat of immersion of the particles in water and determining the agglomerability of the material with heptane while suspended in water. As oxidation proceeded, the heat of immersion increased and the agglomerability decreased, and a direct relationship between the two was observed. more
Date: December 31, 1991
Creator: Qiu, X. & Wheelock, T. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of the selective coagulation process. Final report

Description: The selective hydrophobic coagulation (SHC) process is based on the recent finding that hydrophobic particles can be selectively coagulated without using traditional agglomerating agents or flocculants. The driving force for the coagulation is the attractive energy between hydrophobic surfaces, an interaction that has been overlooked in classical colloid chemistry. In most cases, selective separations can be achieved using simple pH control to disperse the mineral matter, followed by recovery o… more
Date: July 1, 1992
Creator: Yoon, R. H. & Luttrell, G. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Conversion of light hydrocarbon gases in metal carbides for production of liquid fuels and chemicals. Quarterly technical status report, October 1--December 31, 1993

Description: The plasma gun was redesigned, after accidental burn-out in the previous period, to eliminate any possible arcing pathways outside of the inter-electrode region. A stable Argon arc discharge was obtained during the first test-firing of the completely rebuilt gun. The system flow capacity was determined to be about 3 cfm at ambient conditions. Procurement and installation of process and safety monitoring devices and of components of the sample collection system are in progress. The gas-quenched … more
Date: February 1, 1994
Creator: Diaz, A. F.; Modestino, A. J.; Howard, J. B.; Tester, J. W. & Peters, W. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Non-intrusive measurement of particle charge: Electrostatic dry coal cleaning. Technical progress report {number_sign}9, July 1, 1993-September 30, 1993

Description: During the period covered by this report, data quantifying the effect of gas temperature on particle charge were collected. Also, the charging loop current surges, described in the last report, were further investigated and an understanding of their origin has been developed. A new method for determining average particle charge was developed which monitors the current flow from an electrolytic solution as the charged particles are immersed. This report briefly summarizes progress on this projec… more
Date: December 31, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Oxidation of Coal and Coal Pyrite Mechanisms and Influence on Surface Characteristics. Technical Progress Report, [September--December 1991]

Description: The objective of this research is to develop a mechanistic understanding of the oxidation of coal and coal pyrite, and to correlate the intrinsic physical and chemical properties of these minerals, along with changes resulting from oxidation, with those surface properties that influence the behavior in physical coal cleaning processes. The results will provide fundamental insight into oxidation, in terms of the bulk and surface chemistry, the microstructure, and the semiconductor properties of … more
Date: January 28, 1992
Creator: Doyle, F. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bench-scale testing of the Multi-Gravity Separator in combination with Microcel. Fifth quarterly report, October 1, 1993--December 31, 1993

Description: During the quarter ending December, 31, 1993, the independent, combined and long duration testing were completed for both the Pittsburgh No. 8 coal and the Illinois No. 6 coal. Overall, the project is on schedule and the bulk of the critical work, from a timing perspective, is complete. Table 1 summarizes the status of major project tasks as of December 31, 1993. Preliminary results provide strong evidence that combining the Microcel flotation column with the Multi-Gravity Separator has a syner… more
Date: January 1, 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering development of selective agglomeration: Task 6, Operation of the Component Development Test Facility

Description: The objective of this report is to summarize the component development and laboratory binder test work at Wilsonville during Task 6. This Task included the construction and startup of the Component Development Test Facility (CDTF), coal procurement, evaluation of unit operation and dewatering performance, laboratory binder tests for diesel and heptane, production characterization, and vendor tests. Data evaluation, interpretation, and analysis are not included in this report, but will be discus… more
Date: September 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Forming of superplastic ceramics

Description: Superplasticity in ceramics has now advanced to the stage that technologically viable superplastic deformation processing can be performed. In this paper, examples of superplastic forming and diffusion bonding of ceramic components are given. Recent work in biaxial gas-pressure forming of several ceramics is provided. These include yttria-stabilized, tetragonal zirconia (YTZP), a 20% alumina/YTZP composite, and silicon. In addition, the concurrent superplastic forming and diffusion bonding of a… more
Date: May 1, 1994
Creator: Lesuer, D. R.; Wadsworth, J. & Nieh, T. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proof of concept and performance optimization of high gravity batch type centrifuge for dewatering fine coal. Quarterly technical progress report No. 3, March 20, 1990--June 20, 1990, Revision

Description: Coal Technology Corporation (CTC) believes that the new CTC high gravity, high production, batch type centrifugal dryer technology can play a significant role in improving the product quality as well as costs of operation in coal processing plants. It is further believed that the new centrifugal dryer technology can form an important part in systems used to clean up the millions of tons of coal fines in refuse piles and ponds. It is anticipated that the new centrifuge can become an important an… more
Date: July 24, 1990
Creator: Smith, L. B. & Durney, T. E. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrostatic beneficiation of coal

Description: Dry physical beneficiation of coal has many advantages over wet cleaning methods and post combustion flue gas cleanup processes. The dry beneficiation process is economically competitive and environmentally safe and has the potential of making vast amounts of US coal reserves available for energy generation. While the potential of the electrostatic beneficiation has been studied for many years in laboratories and in pilot plants, a successful full scale electrostatic coal cleaning plant has not… more
Date: October 1, 1994
Creator: Mazumder, M. K.; Tennal, K. B. & Lindquist, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Non-intrusive measurement of particle charge: Electrostatic dry coal cleaning. Technical progress report No. 12, April 1, 1994--June 30, 1994

Description: The distribution of charge, described in previous reports, has important consequences on dry separation schemes. For that reason, a deeper understanding of the charge distribution phenomenon was sought. New experiments were conducted and previous data were reexamined to clarify charging characteristics of silica, silica/carbon mixtures, and coal. A petrographic evaluation of separated coals has begun. Samples were collected from the coal feeder, clean coal electrode, and separation chamber bott… more
Date: September 1, 1994
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pyrite surface characterization and control for advanced fine coal desulfurization technologies. Ninth quarterly technical progress report, September 1, 1992-- December 31, 1992

Description: This is the 9th quarterly technical progress report for the project entitled ``Pyrite surface characterization and control for advanced fine coal desulfurization technologies``, DE-FG22-90PC90295. The work presented in this report was performed from September 1, 1992 to November 31, 1992. The objective of the project is to conduct extensive fundamental studies on the surface chemistry of pyrite oxidation and flotation and to understand how the alteration of the coal-pyrite surface affects the e… more
Date: December 31, 1992
Creator: Wang, X. H.; Leonard, J. W.; Parekh, B. K. & Jiang, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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