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Received November 13, 2006
Accepted December 11, 2006
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Selective oxidation of hydrogen sulfide over LaCoO3 and LaSrCoO4 mixed oxides
Institute of Materials, Jiangxi University of Finance and Economics, Nanchang, China 1Division of Chemical Engineering, Pusan National University, Busan 609-735, Korea
dwpark@pusan.ac.kr
Korean Journal of Chemical Engineering, July 2007, 24(4), 592-595(4), 10.1007/s11814-007-0008-8
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Abstract
Perovskite LaCoO3 and perovskite-like LaSrCoO4 mixed oxides were prepared by polyglycol gel method, and their catalytic performance was compared for the selective oxidation of hydrogen sulfide in a stream containing excess amount of ammonia and water for the first time. These samples were investigated by using XRD, BET, O2-TPD and XPS. The catalytic activity and the selectivity to solid products (ammonium thiosulfate and elemental sulfur) of LaCoO3 were better than those of LaSrCoO4, and this is explained in terms surface contents of oxygen and cobalt, oxidation state of cobalt, and BET surface area.
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References
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Shin MY, Park DW, Chung JS, Appl. Catal. B: Environ., 30(3-4), 409 (2001)
Park DW, Park BK, Park DK, Woo HC, Appl. Catal. A: Gen., 223(1-2), 215 (2002)
Kim BG, Park DW, Kim I, Woo HC, Catal. Today, 87(1-4), 11 (2003)
Kim MI, Park DW, Park SW, Yang X, Choi JS, Suh DJ, Catal. Today, 111(3-4), 212 (2006)
Cho YG, Hwang BH, Park DW, Woo HC, Chung JS, Korean J. Chem. Eng., 19(4), 611 (2002)
Kim BK, Hwang BH, Lee HS, Woo HC, Park DW, Korean J. Chem. Eng., 21(1), 104 (2004)
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