Stabilization of spent sorbents from coal-based power generation processes. Technical report, September 1, 1995--November 30,1995

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The overall objective of this study is to determine the effect of implementation of the new and more stringent EPA Protocol Test Method involving sulfide containing waste, on the suitability of the oxidized spent sorbents from gasification of of high sulfur coals for disposal in landfills, and to determine the optimum operating conditions in a ``final`` hydrolysis stage for conversion of the residual calcium sulfide in these wastes to materials that are suitable for disposal in landfills. An additional objective is to study the effect of ash on the regeneration and ash-sorbent separation steps in the Spent Sorbent Regeneration Process ... continued below

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18 p.

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Abbassian, J. & Hill, A.H. December 31, 1995.

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Description

The overall objective of this study is to determine the effect of implementation of the new and more stringent EPA Protocol Test Method involving sulfide containing waste, on the suitability of the oxidized spent sorbents from gasification of of high sulfur coals for disposal in landfills, and to determine the optimum operating conditions in a ``final`` hydrolysis stage for conversion of the residual calcium sulfide in these wastes to materials that are suitable for disposal in landfills. An additional objective is to study the effect of ash on the regeneration and ash-sorbent separation steps in the Spent Sorbent Regeneration Process (SSRP). To achieve these objectives, a large set of oxidized samples of sulfided calcium-based sorbents (produced in earlier ICCI-funded programs) as well as oxidized samples of gasifier discharge (containing ash and spent sorbent) are tested according to the new EPA test protocol. Samples of the oxidized spent sorbents that do not pass the EPA procedure are reacted with water and carbon dioxide to convert the residual calcium sulfide to calcium carbonate. During this quarter, samples of oxidized sulfided calcium-based sorbents, including untreated calcium sulfide-containing feed materials, were analyzed using both weak acid and more stringent strong acid tests. Preliminary analysis of the H{sub 2}S leachability test results indicate that all samples (including those that were not oxidized) pass the EPA requirement of 500 mg H{sub 2}S per kg of solid waste. However, under the strong acid test procedure, samples containing more than 2.5% calcium sulfide fail the EPA requirement.

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18 p.

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OSTI as DE96011748

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  • Other Information: PBD: [1995]

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  • Other: DE96011748
  • Report No.: DOE/PC/92521--T279
  • Grant Number: FC22-92PC92521
  • DOI: 10.2172/249139 | External Link
  • Office of Scientific & Technical Information Report Number: 249139
  • Archival Resource Key: ark:/67531/metadc668584

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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 29, 2016, 4:03 p.m.

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Abbassian, J. & Hill, A.H. Stabilization of spent sorbents from coal-based power generation processes. Technical report, September 1, 1995--November 30,1995, report, December 31, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc668584/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.