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in publisher: "Virginia Polytechnic Institute and State University. Digital Library and Archives."  
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CdSiAs/sub 2/ thin films for solar cell applications. First quarter report April 9, 1979-June 30, 1979

Description: Near stoichiometric bulk polycrystalline CdSiAs/sub 2/ has been synthesized by two techniques: (1) direct fusion of the elements and (2) direct fusion of the binaries SiAs, Cd/sub 3/As/sub 2/ and CdAs/sub 2/. The latter technique resulted in denser ternary material with good homogeneity. The above binaries melt congruently and were also formed by direct fusion. Sputtered ternary films were formed using a bulk CdSiAs/sub 2/ target, and a composite target of CdAs/sub 2/ discs in a Si plate. Compo… more
Date: July 25, 1979
Creator: Burton, L.C. & Slack, L.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optical Fiber Sensor Instrumentation for Slagging Coal Gasifiers

Description: Coal gasifier is one of the most promising solutions for clean fossil energy. Refractory thickness monitoring and online real-time temperature measurement is needed for improved reliability and advanced process control for current and future generation power plants. The objective of this program is to design and implement an optical fiber based sensing system that could potentially be used to monitor refractory wall thickness and temperature inside a coal gasifier. For the thickness monitoring,… more
Date: July 19, 2008
Creator: Wang, Anbo & Cooper, Kristie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Properties of e/sup +/e/sup -/ interactions at. sqrt. s = 50 and 52 GeV

Description: Bhabha scattering and multi-hadronic e/sup +/e/sup -/ annihilation events have been observed in the AMY detector at ..sqrt..s = 50 GeV and ..sqrt..s = 52 GeV at the TRISTAN e/sup +/e/sup -/ storage ring. Here we report the results of a preliminary analysis of the properties of these events. We present results for the e/sup +/e/sup -/ ..-->.. e/sup +/e/sup -/, e/sup +/e/sup -/ ..-->.. ..gamma gamma.. and e/sup +/e/sup -/ ..-->.. ..mu../sup +/..mu../sup -/ differential cross sections as well as f… more
Date: July 1, 1987
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Controlling of incipient oxidation of pyrite for improved rejection. Sixth quarterly technical progress report, January 1, 1994--March 31, 1994

Description: The major objectives of this work are (1) to determine the Eh-pH conditions under which pyrite is stable, (2) to determine the mechanism of the initial stages of pyrite oxidation, and (3) to determine if the semiconducting properties of pyrite affect its oxidation behavior. It is known that moderate oxidation of pyrite produces a hydrophobic surface product. This hydrophobic product makes it extremely difficult to depress pyrite in coal flotation circuits. The eventual objective of this work is… more
Date: July 1, 1994
Creator: Yoon, R. H. & Richardson, P. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced Dewatering Systems Development

Description: A new fine coal dewatering technology has been developed and tested in the present work. The work was funded by the Solid Fuels and Feedstocks Grand Challenge PRDA. The objective of this program was to 'develop innovative technical approaches to ensure a continued supply of environmentally sound solid fuels for existing and future combustion systems with minimal incremental fuel cost.' Specifically, this solicitation is aimed at developing technologies that can (i) improve the efficiency or eco… more
Date: July 31, 2008
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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ESTABLISHMENT OF THE CENTER FOR ADVANCED SEPARATION TECHNOLOGIES

Description: Technical Progress Report describes progress made on the eight sub-projects awarded in the first year of Cooperative Agreement DE-FC26-01NT41091: Establishment of the Center for Advanced Separation Technologies. This work is summarized in the body of the main report: the individual sub-project Technical Progress Reports are attached as Appendices. Due to the time taken up by the solicitation/selection process, these cover the initial 6-month period of activity only.
Date: July 1, 2003
Creator: Rimmer, Hugh W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Controlling incipient oxidation of pyrite for improved rejection. Technical progress report for the ninth quarter, October 1--December 31, 1994

Description: The major objectives of this work are (1) to determine the Eh-pH conditions under which pyrite is stable, (2) to determine the mechanism of the initial stages of pyrite oxidation, and (3) to determine if the semi-conducting properties of pyrite effects its oxidation behavior. It is known that moderate oxidation of pyrite produces a hydrophobic surface product. This hydrophobic product makes it extremely difficult to depress pyrite in coal flotation circuits. The eventual objective of this work … more
Date: July 1, 1995
Creator: Yoon, R. H. & Richardson, P. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Technical Report: April-June 2003

Description: This report describes the technical progress on a project to design and construct a multichannel geophone array that improves tomographic imaging capabilities in both surface and underground mines. No work was completed during this reporting period as project personnel are waiting for the mine to become available for final field testing of the array. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating … more
Date: July 1, 2003
Creator: Westman, Erik C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Precombustion removal of hazardous air pollutant precursors. Third quarterly technical progress report, April 1, 1996--June 30, 1996

Description: This project involves the development of an optimized, bench-scale processing circuit capable of efficiently removing trace elements from run-of-mine coals. The optimized circuit will be developed using characterization data obtained from detailed washability studies and release analyses tests conducted with several eastern US coals. The optimized circuit will incorporate a variety of conventional and advanced coal cleaning processes which are believed to be the most cost-effective and commerci… more
Date: July 19, 1996
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a video-based slurry sensor for on-line ash analysis. Technical progress report, third quarter, April 1, 1995--June 30, 1995

Description: 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 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 Recently, researchers at VPI&SU have developed an optical sensor for phosphate analysis. The sensor uses image processing technology to anal… more
Date: July 25, 1995
Creator: Adel, G. T. & Luttrell, G. H.
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. 18, January 1, 1993--March 31, 1993

Description: This task is the actual demonstration of the advanced froth flotation technology. All previous work has led to this task. ICF KE technicians and process engineers from the team will operate the plant over a 10 month period to demonstrate the capability of the technology to remove 85% of the pyritic sulfur from three different test coals while recovering at least 85% of the as-mined coal`s energy content. Six major subtasks have been included to better define the overall work scope for this task… more
Date: July 1, 1993
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. 26, January 1, 1995--March 31, 1995

Description: A study conducted by Pittsburgh Energy Technology Center of sulfur emissions from about 1,300 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 … more
Date: July 1, 1995
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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