화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.13, No.2, 265-271, March, 2007
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Selective Oxidation of Hydrogen Sulfide over LaSrCoO4 and LaSrCoO3.6F0.4 Mixed Oxides
Xiaomao Yang, Dae-Won Park1, †, and Moon-Il Kim1
  • Institute of Materials, Jiangxi University of Finance and Economics, Nanchang, China
  • 1Division of Chemical Engineering, Pusan National University, Busan 609-735, Korea
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The perovskite-like LaSrCoO4 and LaSrCoO3.6F0.4 mixed oxides of K2NiF4 structure were prepared by using the polyglycol gel method and applied successfully to the selective oxidation of H2S in a stream containing both ammonia and water. These samples were investigated by using XRD, IR, TPD, TPR, and XPS methods. The catalytic activity of LaSrCoO4 was much better than that of LaSrCoO3.6F0.4 in the oxidation reaction, but the selectivity to elemental sulfur and ammonium thiosulfate of LaSrCoO3.6F0.4 was much higher than that of LaSrCoO4. This result is explained in terms of their reduction capacities, contents of Co3+, oxygen vacancies, and mobile lattice oxygen, and surface contents of Co and O.
Keywords:LaSrCoO4;LaSrCoO3.6F0.4;polyglycol gel method;selective oxidation;hydrogen sulfide
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