Application of Zn-contaminated soil: Feasibility study on the removal of H2S from hot coal-derived gas |
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Authors: | Tzu-Hsing Ko |
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Institution: | (1) Department of Leisure and Recreation Management, Kao Fong College of Digital Contents, 38, Hsin-Hsing Road, Chang-Ji Hsiang, Pingtung County, Taiwan |
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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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