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Reactivity of SO2 Catalytic Reduction over Sn-Zr Based Catalyst under High Pressure Condition  

Park, Jung Yun (School of Chemical Engineering & Technology, Yeungnam University)
Park, No-Kuk (Institute of Clean Technology, Yeungnam University)
Lee, Tae Jin (School of Chemical Engineering & Technology, Yeungnam University)
Baek, Jeom-In (Korea Electric Power Research Institute)
Ryu, Chong Kul (Korea Electric Power Research Institute)
Publication Information
Korean Chemical Engineering Research / v.48, no.3, 2010 , pp. 316-321 More about this Journal
Abstract
The $SO_2$ catalytic reduction was carried out under the condition of high pressure in this study. Sn-Zr based oxide and CO were used as the catalyst and reducing agent for the reduction of $SO_2$ to element sulfur, respectively. In order to compare the reactivity with the pressure on the catalytic process, the reactivity tests were performed under the conditions of atmospheric pressure and 20 atm. $SO_2$ conversion, the element sulfur yield and COS selectivity were also compared with changing the reaction temperature, $CO/SO_2$ mole ratio and the space velocity(GHSV). $SO_2$ conversion increased with increasing temperature and $CO/SO_2$ mole ratio under the condition of atmospheric pressure and element sulfur yield decreased due to the production of COS by the series reaction of CO and the produced sulfur. However, high $SO_2$ conversion and high element sulfur were obtained under the condition of 20 atm. It was concluded that COS decreased due to the condensation of the produced element sulfur under the condition of high pressure. Therefore, the high sulfur yield for $SO_2$ catalytic reduction could be profitably obtained under the condition of high pressure.
Keywords
$SO_2$; Catalytic Reduction; Direct Sulfur Recovery; Sn-Zr Catalyst;
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Times Cited By KSCI : 3  (Citation Analysis)
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