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

고압조건에서 Sn-Zr계 촉매상에서 SO2 촉매환원 반응특성

  • 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)
  • 박정윤 (영남대학교, 디스플레이화학공학부) ;
  • 박노국 (영남대학교, 청정기술연구소) ;
  • 이태진 (영남대학교, 디스플레이화학공학부) ;
  • 백점인 (한국전력공사 전력연구원) ;
  • 류청걸 (한국전력공사 전력연구원)
  • Received : 2010.02.04
  • Accepted : 2010.03.04
  • Published : 2010.06.30

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

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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