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Application of Zn-contaminated soil: Feasibility study on the removal of H2S from hot coal-derived gas

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Abstract

In this study, zinc-contaminated soils were chosen as a candidate material for the removal of hydrogen sulfide (H2S) from hot coal-derived gas. Laboratory experiments showed that H2S was decreased to less than 10 ppm when the zinc-contaminated soils were reacted with H2S. The best removal temperature of H2S was found to be at 550°C in the operating conditions. In addition to zinc species, free iron oxides in contaminated soils also performed an active species to react with H2S and enhanced the sulfur capacity. Through the XPS analysis, iron sulfide (FeS) and zinc sulfide (ZnS) were the major products after removal experiments. Regeneration experimental results indicated that the zinc-contaminated soils can be regenerated by pass diluted air and thus be reused on the removal of H2S for many times.

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Acknowledgments

The author would like to thank the National Science Council, Taiwan, R.O.C. for the financial support of this research under Grant No. NSC 95-2221-E-526-001. Special thanks to Mrs. Meng-Hsui Shih for her assistance in the analyses of basic properties of the tested soils in this study.

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Authors and Affiliations

  1. Department of Leisure and Recreation Management, Kao Fong College of Digital Contents, 38, Hsin-Hsing Road, Chang-Ji Hsiang, Pingtung County, Taiwan

    Tzu-Hsing Ko

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  1. Tzu-Hsing Ko
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Correspondence to Tzu-Hsing Ko.

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Ko, TH. Application of Zn-contaminated soil: Feasibility study on the removal of H2S from hot coal-derived gas. Environ Chem Lett 9, 77–82 (2011). https://doi.org/10.1007/s10311-009-0249-3

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  • DOI: https://doi.org/10.1007/s10311-009-0249-3

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