Characteristics of H2S Removal of Mixed-oxide Sorbents Containing Fe and Zn at High Temperatures.
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An integrated coal gasification molten carbonate fuel cells power generation system (IG-MCFC) has higher thermal efficiency than an integrated coal gasi-fication combined cycle power generation system (IGCC). In IG-MCFC, it is necessary to remove sulfur compounds (H<SUB>2</SUB>S, COS) so that there are less than 1 ppm. Iron oxide sorbents developed in IGCC can not achieve this. New sorbents need to be developed for this reason.<BR>A zinc element has high ability for sulfur removal to less than 1 ppm. We prepared mixed oxide sorbents containing iron and zinc, and evaluated the characteristics of H<SUB>2</SUB>S removal.<BR>1. A zinc element, which was added to the sorbents as zinc ferrite (ZnFe<SUB>2</SUB>0<SUB>4</SUB>), had the highest reactivity.<BR>2. Silica added to zinc ferrite had much effect on protecting of carbon depositions.<BR>3. Zinc ferrite sorbents could remove H<SUB>2</SUB>S down to less than 1 ppm.<BR>4. Zinc ferrite sorbents after regeneration couldalso have less than 1 ppm.<BR>5. The sorbents' desulfurization performance after regeneration was influenced by change of the specific surface area caused by regeneration.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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