화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.12, No.1, 80-85, January, 2006
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The Selective Oxidation of H2S on V2O5 /Zeolite-X Catalysts in an IGCC System
Jong Dae Lee, Gi Bo Han, No-Kuk Park, Si Ok Ryu, and Tae Jin Lee†
  • National Research Laboratory, School of Chemical Engineering and Technology, Yeungnam University, Gyeongsan 712-719, Korea
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Zeolite-KX, which showed high activity for the selective oxidation of H2S under water-free condition, was deactivated by the strong adsorption of water vapor. Among the transition metal oxides tested for the selective oxidation of H2S in the presence of water vapor at 275 ℃, V2O5 showed the highest conversion of H2S and selectivity of elemental sulfur. The conversion of H2S on V2O5 in the presence of water vapor at 200 ℃ was 75%, 17 % lower than that under water-free conditions because of the degraded reduction of V2O5. The degraded reduction of V2O5 could be alleviated by mechanically mixing with zeolite-NaX or KX. The conversion of H2S on V2O5 that had been mechanically mixed with zeolite-NaX or KX was about 85%, which was 10% higher than that on unmixed V2O5 under the same reaction conditions. The conversion could be maintained very well when using a coal-derived synthesis gas. It can be concluded that the selective oxidation of H2S can be applied to the hot gas cleanup in IGCC system.
Keywords:selective oxidation of hydrogen sulfide;V2O5-zeolite X catalyst;hot gas cleanup in IGCC system
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