Composition modification of zinc titanate sorbents for hot gas desulfurization. Technical report, March 1--May 31, 1995

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For new coal gasification systems, zinc titanate sorbents are being developed to remove sulfur from the hot product gas prior to its use in combined cycle turbines and high temperature fuel cells. Although most of the properties of these sorbents are very attractive, there are still concerns about durability over many sulfidation-regeneration cycles and zinc losses due to vaporization. Doping the zinc titanate with other metal ions could alleviate both concerns, which are the objectives of this project. After a screening study was completed, it was decided that Cr offered more promise as a dopant than Ni, Cu, Mg, and ... continued below

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17 p.

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Swisher, J. H. December 31, 1995.

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Description

For new coal gasification systems, zinc titanate sorbents are being developed to remove sulfur from the hot product gas prior to its use in combined cycle turbines and high temperature fuel cells. Although most of the properties of these sorbents are very attractive, there are still concerns about durability over many sulfidation-regeneration cycles and zinc losses due to vaporization. Doping the zinc titanate with other metal ions could alleviate both concerns, which are the objectives of this project. After a screening study was completed, it was decided that Cr offered more promise as a dopant than Ni, Cu, Mg, and Al. Therefore six new sorbent formulations containing Cr were prepared, and they are now being evaluated with a series of bulk density, X-ray diffraction, crush strength and thermogravimetric analysis (TGA) measurements. Results to date suggest that, while Zn vaporization losses can be reduced with Cr additions, a penalty in chemical reactivity occurs. A fixed bed test was also completed this quarter on a Cr-containing formulation. The H{sub 2}S breakthrough time was about 11 hours, and utilization of Zn in the sorbent was 60.5%.

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17 p.

Notes

OSTI as DE96006561

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  • Other Information: PBD: [1995]

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  • Other: DE96006561
  • Report No.: DOE/PC/92521--T221
  • Grant Number: FC22-92PC92521
  • DOI: 10.2172/206505 | External Link
  • Office of Scientific & Technical Information Report Number: 206505
  • Archival Resource Key: ark:/67531/metadc668850

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  • December 31, 1995

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  • June 29, 2015, 9:42 p.m.

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  • June 23, 2016, 1:24 p.m.

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Swisher, J. H. Composition modification of zinc titanate sorbents for hot gas desulfurization. Technical report, March 1--May 31, 1995, report, December 31, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc668850/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.