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Advanced coal liquefaction. Final project report
Molecular level liquid phase separation was explored using modified microporous ceramic membranes with pore size reduced from 40{Angstrom} via chemical vapor deposition. At room temperature, membranes with pore sizes <30{Angstrom} were sufficient to achieve >97% rejection of naphthyl-bibenzyl-methane (NBBM) in toluene, likely attributed to the hindrance effect of NBBM through the porous avenue of the membrane. The rejection diminished dramatically as the temperature was increased. The permeance of the mixture was substantially lower than that of the solvent resulted from the interference by the solute through the transport avenue. Also, it was found that the rejection increases along with the transmembrane pressure increase, probably attributed to the pore size distribution of the membrane. The smaller pore sizes become accessible to the solvent while rejecting the solute at the higher pressure. In addition to size-based separation, active transport of molecules through an appropriate pore size at 300-400{degrees}C was observed, as a result of interaction with the surface. Decomposition of NBBM took place at 400{degrees}C in a modified membrane packed with the catalyst synthesized using the similar protocol as membranes. The separation property of this membrane at 400{degrees}C was analyzed indirectly based upon the reaction product distribution.
Date:
December 2, 1996
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 96, No. 225, Ed. 1 Monday, December 2, 1996
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 1996
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Sun (Alvin, Tex.), Vol. 106, No. 34, Ed. 1 Monday, December 2, 1996
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 1996
Creator:
Schwind, Jim & Chionsini Gavigan, Brandi
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 75, No. 27, Ed. 1 Monday, December 2, 1996
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 2, 1996
Creator:
Dobbs, Gary
Object Type:
Newspaper
System:
The Portal to Texas History
Chickasha Daily Express (Chickasha, Okla.), Vol. 106, No. 216, Ed. 1 Monday, December 2, 1996
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 1996
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Clean Air Act Issues
The 104th Congress enacted four bills modifying provisions of the Clean Air Act (CAA) and held numerous oversight hearings, as EPA and the states continued to implement requirements of the Act's 1990 Amendments. The Amendments set deadlines for issuance of new regulations and attainment of air quality standards.
Date:
December 2, 1996
Creator:
McCarthy, James E.
Object Type:
Report
System:
The UNT Digital Library
Cooperative R&D: Federal Efforts to Promote Industrial Competitiveness
In response to the foreign challenge in the global marketplace, the United States Congress has explored ways to stimulate technological advancement in the private sector. The government has supported various efforts to promote cooperative research and development activities among industry, universities, and the federal R&D establishment designed to increase the competitiveness of American industry and to encourage the generation of new products, processes, and services. Among the issues before Congress are whether joint ventures contribute to industrial competitiveness and what role, if any, the government has in facilitating such arrangements.
Date:
December 2, 1996
Creator:
Schacht, Wendy H.
Object Type:
Report
System:
The UNT Digital Library
Cuba: Issues for Congress
This report examines the economic and political situation in Cuba, including the human rights situation, and U.S. policy toward Cuba. The report also analyzes a number of issues facing Congress in U.S. policy toward Cuba, including: the overall direction of U.S. policy; challenges to U.S. policy in the World Trade Organization; restrictions on commercial food and medical exports; restrictions on travel; bilateral drug trafficking cooperation; Cuba and terrorism; funding for U.S.-government sponsored radio and television broadcasting to Cuba; the Russian signals intelligence facility in Cuba; migration issues; and compensation to the families of those Americans killed in 1996 when Cuba shot down two U.S. civilian planes. The report cites legislation that was passed in the 106th Congress, and also tracks legislative action on these various issues in U.S. policy toward Cuba in the 107th Congress.
Date:
December 2, 1996
Creator:
Sullivan, Mark P.
Object Type:
Report
System:
The UNT Digital Library
Development of a video-based slurry sensor for on-line ash analysis. Final technical report, October 1, 1994--September 30, 1996
Automatic control of fine coal cleaning circuits has traditionally been limited by the lack of sensors for on-line ash analysis. Although several nuclear-based slurry analyzers are available, none have seen widespread acceptance. This is largely due to the fact that nuclear sensors are expensive and tend to be influenced by changes in seam type and pyrite content. In this investigation, an image analysis technique is used for on-line determination of ash content in fine coal slurries. The ash content of a flotation tailings stream is correlated to the mean gray level of the slurry. Based on a 90% prediction interval, an analysis of sensor performance indicates an accuracy of 73 {+-} 4% ash over a range from 65 - 90% ash. While this result is comparable to existing nuclear-based analyzers, the video-based system is only a fraction of the cost. The sensor is currently being used to monitor the column flotation tailings stream at the Middle Fork preparation plant owned and operated by Pittston Coal Company.
Date:
December 2, 1996
Creator:
Adel, G. T. & Luttrell, G. H.
Object Type:
Report
System:
The UNT Digital Library
Development of precipitated iron Fischer-Tropsch catalysts. Quarterly technical progress report for the period July 1, 1996--September 30, 1996
Two slurry reactor tests were completed in continuation of our studies on the effect of pretreatment conditions on catalyst reactivity and selectivity. Exceptionally good performance was obtained in run SA-2186, using the new pretreatment developed at Texas A&M University. The work on catalyst characterization by temperature programmed and isothermal reduction on a variety of iron catalysts, with different amounts of promoters, has been continued. These studies are complementing our work on pretreatment effect research, and provide additional insights into the effect of pretreatment procedures on the reduction behavior of iron catalysts. The overall objectives are to: (1) demonstrate repeatability of performance and preparation procedure of two high activity, high alpha iron Fischer-Tropsch catalysts synthesized at Texas A&M University; (2) seek potential improvements in the catalysts performance through variation in process condition, pretreatment procedures and/or modifications in catalyst synthesis; (3) investigate performance of catalysts in a small bubble column slurry reactor; and (4) investigate feasibility of producing catalysts on a large scale in collaboration with a catalyst manufacturer.
Date:
December 2, 1996
Creator:
Bukur, D.B.
Object Type:
Report
System:
The UNT Digital Library
Double-shell tank remaining useful life estimates
The existing 28 double-shell tanks (DSTS) at Hanford are currently planned to continue operation through the year 2028 when disposal schedules show removal of waste. This schedule will place the DSTs in a service life window of 4O to 60 years depending on tank construction date and actual retirement date. This paper examines corrosion- related life-limiting conditions of DSTs and reports the results of remaining useful life models developed for estimating remaining tank life. Three models based on controllable parameters such as temperature, chemistry, and relative humidity are presented for estimates to the year in which a particular DST may receive a breach in the primary tank due to pitting in the liquid or vapor region. Pitting is believed to be the life-limiting condition for DSTs,however, the region of the most aggressive pitting (vapor space or liquid) requires further investigation. The results of the models presented suggest none of the existing DSTs should fail by through-wall pitting until well beyond scheduled retrieval in 2028. The estimates of tank breach years (the year in which a tank may be expected to breach the primary tank wall) range from 2056 for pitting corrosion in the liquid region of tank 104-AW to beyond …
Date:
December 2, 1996
Creator:
Anantatmula, R. P.
Object Type:
Article
System:
The UNT Digital Library
Enumeration of Microbial Populations in Radioactive Environments by Epifluorescence Microscopy
Epifluorescence microscopy was utilized to enumerate halophilic bacterial populations in two studies involving inoculated, actual radioactive waste/brine mixtures and pure brine solutions. The studies include an initial set of experiments designed to elucidate potential transformations of actinide-containing wastes under salt-repository conditions, including microbially mediated changes. The first study included periodic enumeration of bacterial populations of a mixed inoculum initially added to a collection of test containers. The contents of the test containers are the different types of actual radioactive waste that could potentially be stored in nuclear waste repositories in a salt environment. The transuranic waste was generated from materials used in actinide laboratory research. The results show that cell numbers decreased with time. Sorption of the bacteria to solid surfaces in the test system is discussed as a possible mechanism for the decrease in cell numbers. The second study was designed to determine radiological and/or chemical effects of {sup 239}Pu, {sup 243}Am, {sup 237}Np, {sup 232}Th and {sup 238}U on the growth of pure and mixed anaerobic, denitrifying bacterial cultures in brine media. Pu, Am, and Np isotopes at concentrations of <=1 x 10{sup {minus}5}M, <=5 x 10{sup {minus}6}M and <=5 x 10{sup {minus}4}M respectively, and Th and U …
Date:
December 2, 1996
Creator:
Pansoy-Hjelvik, M. E. A.; Strietelmeierr, B. A.; Paffett, M. T.; Kitten, S. M.; Leonard, P. A.; Dunn, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Industrial Competitiveness and Technological Advancement: Debate Over Government Policy
Concern has been growing that the pace of U.S. technological advancement is declining, with negative consequences for U.S. economic growth, productivity, and international competitiveness. Because technology can contribute to economic growth and productivity increases, congressional interest has focused on how to augment private sector technological development. Legislative activity over the past decade has created a policy for technology development, albeit an ad hoc one. Because of the lack of consensus on the scope and direction of a national policy, Congress has taken an incremental approach aimed at creating new mechanisms to facilitate technological advancement in particular areas and making changes and improvements as necessary.
Date:
December 2, 1996
Creator:
Schacht, Wendy H.
Object Type:
Report
System:
The UNT Digital Library
The Line Item Veto Act: Procedural Issues
At various times, Congress has given the President statutory authority not to spend appropriated funds. That authority was elaborated and made more systematic with the Impoundment Control Act of 1974, which permitted the President to delay the expenditure of funds (deferral authority) and to cancel funds (rescission authority). To rescind funds, the President needed the support of both houses within 45 days.
Date:
December 2, 1996
Creator:
Fisher, Louis & McMurtry, Virginia A.
Object Type:
Report
System:
The UNT Digital Library
[Memorandum from Patricia Russell-McCloud to Chapter Presidents of The Links, Inc. - December 2, 1996]
Letter from Patricia Russell-McCloud to chapter presidents of The Links, Inc. informing members that the national offices of The Links, Inc. and The Links Foundation will undergo reorganizations at the beginning of the new year in 1997. Consequently, members trying to contact the offices, especially the human resources department, may experience delays. Also, as a result of the reorganization, many positions in the national offices will open and Links' members from all chapters are encouraged to apply.
Date:
December 2, 1996
Creator:
Russell-McCloud, Patricia
Object Type:
Text
System:
The Portal to Texas History
[News Clip: Cemetary]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 10 P.M.
Date:
December 2, 1996
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Cemetery pkg]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6 P.M.
Date:
December 2, 1996
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Choir]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
December 2, 1996, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: DPD Sex]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
December 2, 1996, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Fan Party]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
December 2, 1996, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: MHMR probe]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. Story aired at 10pm.
Date:
December 2, 1996, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Store shooting]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 5pm.
Date:
December 2, 1996, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 81, No. 73, Ed. 1 Monday, December 2, 1996
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
December 2, 1996
Creator:
Brooks, Lori
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Perry Daily Journal (Perry, Okla.), Vol. 103, No. 250, Ed. 1 Monday, December 2, 1996
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 2, 1996
Creator:
Taylor, Gene
Object Type:
Newspaper
System:
The Gateway to Oklahoma History