Task 5.4 -- Stable and supercritical chars. Semi-annual report, January 1--June 30, 1995

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The use of chars and carbons as absorbents and catalyst supports could be expanded if their stability to reactive gases were improved. The purpose of this task is to develop methods for applying surface coatings of boron carbide, silicon carbide, and titanium carbide on the char. Formation of these composites will increase stability and improve structural strength and, consequently, resistance to abrasion. The first objective of this task is to develop methods for coating low-rank coal (LRC) chars and carbons by chemical vapor deposition (CVD) to produce high surface area composites that are inert to reactive atmospheres. The proposed coating ... continued below

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11 p.

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Olson, E.S. & Sharma, R.K. December 31, 1995.

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Description

The use of chars and carbons as absorbents and catalyst supports could be expanded if their stability to reactive gases were improved. The purpose of this task is to develop methods for applying surface coatings of boron carbide, silicon carbide, and titanium carbide on the char. Formation of these composites will increase stability and improve structural strength and, consequently, resistance to abrasion. The first objective of this task is to develop methods for coating low-rank coal (LRC) chars and carbons by chemical vapor deposition (CVD) to produce high surface area composites that are inert to reactive atmospheres. The proposed coating layers will be formed from elements known to form extremely hard and stable carbide materials. The second objective is to determine the feasibility of using supercritical extraction to prepare an activated carbon with a very high surface area. During this report period supercritical solvent extraction was investigated as a means of producing very large microporous structures in chars. Wyodak subbituminous coal, Gascoyne lignite, and Velva lignite were used for the supercritical extractions.

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11 p.

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OSTI as DE97002219

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  • Other Information: PBD: 1995

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  • Other: DE97002219
  • Report No.: DOE/MC/30097--5572
  • Grant Number: FC21-93MC30097
  • DOI: 10.2172/650107 | External Link
  • Office of Scientific & Technical Information Report Number: 650107
  • Archival Resource Key: ark:/67531/metadc703805

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  • December 31, 1995

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  • Sept. 12, 2015, 6:31 a.m.

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  • May 2, 2016, 1:37 p.m.

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Olson, E.S. & Sharma, R.K. Task 5.4 -- Stable and supercritical chars. Semi-annual report, January 1--June 30, 1995, report, December 31, 1995; Grand Forks, North Dakota. (digital.library.unt.edu/ark:/67531/metadc703805/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.