Elemental sulfur recovery from desulfurization sorbents in advanced power systems

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Regenerable metal oxide sorbents, such as zinc titanate, are being developed to efficiently remove hydrogen sulfide (H{sub 2}S) from coal gas in advanced power systems. Dilute air regeneration of the sorbents produces a tailgas containing a few percent sulfur dioxide (SO{sub 2}). Catalytic reduction of the SO{sub 2} to elemental sulfur with a coal gas slipstream using the Direct Sulfur Recovery Process (DSRP) is a leading first-generation technology. Currently the DSRP is undergoing field testing at gasifier sites. The objective of this study is to develop second-generation processes that produce elemental sulfur with limited use of coal gas. Novel approaches ... continued below

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14 p.

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Dorchak, T.P.; Gangwal, S.K. & Turk, B.S. December 31, 1995.

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Description

Regenerable metal oxide sorbents, such as zinc titanate, are being developed to efficiently remove hydrogen sulfide (H{sub 2}S) from coal gas in advanced power systems. Dilute air regeneration of the sorbents produces a tailgas containing a few percent sulfur dioxide (SO{sub 2}). Catalytic reduction of the SO{sub 2} to elemental sulfur with a coal gas slipstream using the Direct Sulfur Recovery Process (DSRP) is a leading first-generation technology. Currently the DSRP is undergoing field testing at gasifier sites. The objective of this study is to develop second-generation processes that produce elemental sulfur with limited use of coal gas. Novel approaches that were evaluated to produce elemental sulfur from sulfided sorbents include (1) SO{sub 2} regeneration, (2) substoichiometric oxidation, (3) steam regeneration followed by H{sub 2}S oxidation, and (4) steam-air regeneration. Experimental results at high temperature and high pressure demonstrate that, with simple sorbent modifications, direct regeneration to elemental sulfur is feasible without the use of coal gas.

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14 p.

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OSTI as DE96004339

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  • Annual meeting of the American Institute of Chemical Engineers, Miami Beach, FL (United States), 12-17 Nov 1995

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  • Other: DE96004339
  • Report No.: DOE/METC/C--96/7219
  • Report No.: CONF-951180--2
  • Office of Scientific & Technical Information Report Number: 181494
  • Archival Resource Key: ark:/67531/metadc669959

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 30, 2015, 8:04 p.m.

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Dorchak, T.P.; Gangwal, S.K. & Turk, B.S. Elemental sulfur recovery from desulfurization sorbents in advanced power systems, article, December 31, 1995; Morgantown, West Virginia. (digital.library.unt.edu/ark:/67531/metadc669959/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.