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Pelletizing/reslurrying as a means of distributing and firing clean coal
Battelle-Columbus and Amax Research Development conducted a program to develop a process to transport, handle, store, and utilize ultra-fine, ultra-clean (UFUC) coals. The primary objective was to devise a cost-effective method, based on conventional pelletization techniques, to transform the sludge-like filter cake produced in advanced flotation cleaning processes into a product which could be used like lump coal. A secondary objective was the production of a pellet which could be readily converted into a coal water fuel (CWF) because the UFUC coal would ultimately be used as CWF. The resulting product would be a hard, waterproof pellet which could be easily reduced to small particle sizes and formulated with water into a liquid fuel.
Date:
September 29, 1992
Creator:
Conkle, H. N.
Object Type:
Report
System:
The UNT Digital Library
Investigation of cold nuclear fusion in condensed matter
Recent research has been directed towards finding means to produce neutron emissions at will, to demonstrate reproducibility, and to permit in-depth studies of the origin of neutron emissions. this goal has been pursued in the Kamiokande detector in Japan and has led to the development of a deep underground laboratory in a tunnel in the Wasatch mountains near Brigham Young University. New counters for low-level neutron emissions are being utilized. Calorimetric tools have also been developed.
Date:
December 29, 1992
Creator:
Jones, S. E.; Berrondo, M.; Czirr, J. B.; Decker, D. L.; Harrison, K.; Jensen, G. L. et al.
Object Type:
Report
System:
The UNT Digital Library
High temperature alkali corrosion of ceramics in coal gas
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, and fireclay glass. The study consists of identification of the alkali reaction products (phase equilibria) and the kinetics of the alkali reactions as a function of temperature and time.
Date:
August 29, 1992
Creator:
Pickrell, G. R.; Sun, T. & Brown, J. J.
Object Type:
Report
System:
The UNT Digital Library
Bioprocessing of lignite coals using reductive microorganisms
In order to convert lignite coals into liquid fuels, gases or chemical feedstock, the macromolecular structure of the coal must be broken down into low molecular weight fractions prior to further modification. Our research focused on this aspect of coal bioprocessing. We isolated, characterized and studied the lignite coal-depolymerizing organisms Streptomyces viridosporus T7A, Pseudomonas sp. DLC-62, unidentified bacterial strain DLC-BB2 and Gram-positive Bacillus megaterium strain DLC-21. In this research we showed that these bacteria are able to solubilize and depolymerize lignite coals using a combination of biological mechanisms including the excretion of coal solublizing basic chemical metabolites and extracellular coal depolymerizing enzymes.
Date:
March 29, 1992
Creator:
Crawford, D. L.
Object Type:
Report
System:
The UNT Digital Library
Cutting tool study: 21-6-9 stainless steel
The Rocky Flats Plant conducted a study to test cermet cutting tools by performing machinability studies on War Reserve product under controlled conditions. The purpose of these studies was to determine the most satisfactory tools that optimize tool life, minimize costs, improve reliability and chip control, and increase productivity by performing the operations to specified Accuracies. This study tested three manufacturers' cermet cutting tools and a carbide tool used previously by the Rocky Flats Plant for machining spherical-shaped 21-6-9 stainless steel forgings (Figure 1). The 80-degree diamond inserts were tested by experimenting with various chip-breaker geometries, cutting speeds, feedrates, and cermet grades on the outside contour roughing operation. The cermets tested were manufactured by Kennametal, Valenite, and NTK. The carbide tool ordinarily used for this operation is manufactured by Carboloy. Evaluation of tho tools was conducted by investigating the number of passes per part and parts per insert, tool wear, cutting time, tool life, surface finish, and stem taper. Benefits to be gained from this study were: improved part quality, better chip control, increased tool life and utilization, and greater fabrication productivity. This was to be accomplished by performing the operation to specified accuracies within the scope of the tools …
Date:
July 29, 1992
Creator:
McManigle, A. P.
Object Type:
Report
System:
The UNT Digital Library
Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes. Volume 1, Dry sorbent injection: Final report
This report presents the results of fundamental mass transfer testing for in-duct removal of SO{sub 2}. Following this initial part of an experimental program, it became clear that the amount of initial moisture on the sorbent strongly affected the extent of Ca(OH){sub 2} conversion. Novel techniques aimed at increasing sorbent utilization were investigated and are described. Major novel technique investigated and reported on here was the reaction with SO{sub 2} of sorbents with initial free moisture (damp sorbents). The duct injection process using damp solids has the following steps: preparation of sorbent as a slurry, blending of the slurry with dry recycle materials to create damp solids, injection of the solids into the duct, reaction and drying of the solids with flue gas in the duct, collection in particulate control equipment, and finally recycle of dry solids with some bleed to disposal. The moisture content of the solids at each step affects system performance. Various factors favor high moisture whereas others favor low moisture. (VC)
Date:
January 29, 1992
Creator:
Jozewicz, W. & Rochelle, G. T.
Object Type:
Report
System:
The UNT Digital Library
Integrated dry NO{sub x}/SO{sub 2} emissions control system. Quarterly report No. 6, April 1--June 30, 1992
This Quarterly Report summarizes the Integrated Dry NO{sub x}/SO{sub 2} Emissions Control System Project (DOE Agreement No. DE-FC22-91PC90550) progress for the months of April, May, and June 1992. Public Service Company of Colorado (``PSCC``) activities focused on construction of all systems for the project. The unit was off-line for installation of the project equipment from March 20, 1992 through May 30, 1992. A short summary of the items completed are listed. Construction activities centered on boiler modifications to install the new burners and the overfire air system. A major milestone was achieved when the boiler was successfully hydrotested on April 18, 1992. Gas burners were fired on May 27, 1992 and the unit was operating on coal May 30, 1992 at 5OMWe. Startup went was very smooth. with only minor modifications required. Significant progress was made on construction of the dry sorbent injection system this quarter. All equipment has been set and most piping is complete. All work on the humidification system, other than painting and insulation, was completed.
Date:
September 29, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes. Volume 2, Duct spray drying: Final report
Removal of sulfur dioxide (SO{sub 2}) from the flue gas of coal- burning power plants can be achieved by duct spray drying using calcium hydroxide [Ca(OH){sub 2}] slurries. A primary objective of this research was to discover the aspects of mass transfer into Ca(OH){sub 2} slurries which limit SO{sub 2} absorption. A bench- scale stirred tank reactor with a flat gas/liquid interface was used to simulate SO{sub 2} absorption in a slurry droplet. The absorption rate of SO{sub 2} from gas concentrations of 500 to 5000 ppm was measured at 55{degrees}C in clear solutions and slurries of Ca(OH){sub 2} up to 1.0 M (7 wt percent). Results are reported in terms of the enhancement factor, {O}. This research will allow prediction of conditions where the absorption of SO{sub 2} in Ca(OH){sub 2} slurries can be enhanced by changes to liquid phase constituents (under which SO{sub 2} absorption is controlled by liquid film mass transfer). Experiments in the stirred tank have shown that SO{sub 2} absorption in a 1.0 M Ca(OH){sub 2} slurry was completely dominated by gas film mass transfer with a large excess of Ca(OH){sub 2} but becomes controlled by liquid film resistance at greater than 50 percent Ca(OH){sub …
Date:
January 29, 1992
Creator:
Jozewicz, W. & Rochelle, G. T.
Object Type:
Report
System:
The UNT Digital Library
Finite difference program for calculating hydride bed wall temperature profiles
A QuickBASIC finite difference program was written for calculating one dimensional temperature profiles in up to two media with flat, cylindrical, or spherical geometries. The development of the program was motivated by the need to calculate maximum temperature differences across the walls of the Tritium metal hydrides beds for thermal fatigue analysis. The purpose of this report is to document the equations and the computer program used to calculate transient wall temperatures in stainless steel hydride vessels. The development of the computer code was motivated by the need to calculate maximum temperature differences across the walls of the hydrides beds in the Tritium Facility for thermal fatigue analysis.
Date:
October 29, 1992
Creator:
Klein, J. E.
Object Type:
Report
System:
The UNT Digital Library
Bioprocessing of lignite coals using reductive microorganisms. Final technical report, September 30, 1988--March 29, 1992
In order to convert lignite coals into liquid fuels, gases or chemical feedstock, the macromolecular structure of the coal must be broken down into low molecular weight fractions prior to further modification. Our research focused on this aspect of coal bioprocessing. We isolated, characterized and studied the lignite coal-depolymerizing organisms Streptomyces viridosporus T7A, Pseudomonas sp. DLC-62, unidentified bacterial strain DLC-BB2 and Gram-positive Bacillus megaterium strain DLC-21. In this research we showed that these bacteria are able to solubilize and depolymerize lignite coals using a combination of biological mechanisms including the excretion of coal solublizing basic chemical metabolites and extracellular coal depolymerizing enzymes.
Date:
March 29, 1992
Creator:
Crawford, D. L.
Object Type:
Report
System:
The UNT Digital Library
Moscow Test Well, INEL Oversight Program: Aqueous geochemistry
This report presents a summary and interpretation of data gathered during sampling of the Moscow Test Well at Moscow, Idaho during April and May of 1992. The principal objectives of this chemical survey were to validate sampling procedures with a new straddle packer sampling tool in a previously hydrologically well characterized and simple sampling environment, and to compare analytical results from two independent labs for reproducibility of analytical results. Analytes included a wide range of metals, anions, nutrients, BNA`s, and VOC`s. Secondary objectives included analyzing of waters from a large distilled water tank (utilized for all field laboratory purposes as ``pure`` stock water), of water which passed through a steamer used to clean the packer, and of rinsates from the packer tool itself before it was lowered into the test well. Analyses were also obtained of blanks and spikes for data validation purposes.
Date:
September 29, 1992
Creator:
McCurry, M.; Fromm, J. & Welhan, J.
Object Type:
Report
System:
The UNT Digital Library
Activation and deactivation of high concentration arsenic with some evidence of precipitation
Using box-shaped profiles created by laser melt annealing, the authors investigate the kinetics of arsenic activation and deactivation. They find deactivation shows no history effects, which can be consistent either with clustering or precipitation for the cases considered. For activation, they notice it occurs on very short time scales, followed by a slower deactivation process. This is suggestive evidence that at least some precipitation occurs.
Date:
December 29, 1992
Creator:
Rousseau, P. M.; Griffin, P. B.; Plummer, J. D. & Carey, P. G.
Object Type:
Article
System:
The UNT Digital Library
San Antonio Register (San Antonio, Tex.), Vol. 61, No. 26, Ed. 1 Thursday, October 29, 1992
Weekly newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.
Date:
October 29, 1992
Creator:
Glosson, Edwin
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 117, No. 21, Ed. 1 Thursday, October 29, 1992
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
October 29, 1992
Creator:
Lucas, Donnie A.
Object Type:
Newspaper
System:
The Portal to Texas History
[News release: Secretary of Army discharges lesbian colonel despite objection by National Guard]
A news release from the Lambda Legal Defense and Education Inc. about Colonel Margarethe Cammermeyer being dismissed after 26 years of service with the National Guard because of her sexual orientation.
Date:
May 29, 1992
Creator:
Lambda Legal Defense and Education Fund Inc.
Object Type:
Text
System:
The UNT Digital Library
[News release: Oral Arugments Presented on Constitutionality of "Sodomy Law"]
A news release from the Texas Human Rights Foundation about the continuance of a civil case against Texas Sodomy Statute.
Date:
January 29, 1992
Creator:
Texas Human Rights Foundation
Object Type:
Text
System:
The UNT Digital Library
[News Clip: B. J. Thomas Concert]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
October 29, 1992, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Phantom]
B-roll footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
August 29, 1992, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Dustin Hoffman]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
September 29, 1992, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Wylie News (Wylie, Tex.), Vol. 44, No. 34, Ed. 1 Wednesday, January 29, 1992
Weekly newspaper from Wylie, Texas that includes local, state and national news along with advertising.
Date:
January 29, 1992
Creator:
Smith, C. Truett
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: Bromley FOLO]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
January 29, 1992, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Paducah Post (Paducah, Tex.), Vol. 86, No. 11, Ed. 1 Wednesday, April 29, 1992
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
April 29, 1992
Creator:
Taylor, Jimmye C.
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 97, No. 5, Ed. 1 Wednesday, January 29, 1992
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
January 29, 1992
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 97, No. 18, Ed. 1 Wednesday, April 29, 1992
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
April 29, 1992
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History