Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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A Study on Reactivity of ZnO-CuO Sorbent for Hot Gas Desulfurization

고온 연료가스 정제를 위한 ZnO-CuO 혼성탈황제의 반응 특성연구

  • Jung, Yong-Kgil (National Research Laboratory, School of Chemical Engineering & Technology, Yeungnam University) ;
  • Park, No-Kuk (National Research Laboratory, School of Chemical Engineering & Technology, Yeungnam University) ;
  • Jun, Jin Hyuk (National Research Laboratory, School of Chemical Engineering & Technology, Yeungnam University) ;
  • Lee, Jong-Dae (National Research Laboratory, School of Chemical Engineering & Technology, Yeungnam University) ;
  • Ryu, Si-Ok (National Research Laboratory, School of Chemical Engineering & Technology, Yeungnam University) ;
  • Lee, Tae-Jin (National Research Laboratory, School of Chemical Engineering & Technology, Yeungnam University)
  • 정용길 (영남대학교 용용화학공학부 국가지정연구실) ;
  • 박노국 (영남대학교 용용화학공학부 국가지정연구실) ;
  • 전진혁 (영남대학교 용용화학공학부 국가지정연구실) ;
  • 이종대 (영남대학교 용용화학공학부 국가지정연구실) ;
  • 류시옥 (영남대학교 용용화학공학부 국가지정연구실) ;
  • 이태진 (영남대학교 용용화학공학부 국가지정연구실)
  • Received : 2003.12.15
  • Accepted : 2004.01.16
  • Published : 2003.12.01
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Abstract

ZnO-CuO mixed sorbents for desulfurization in hot gas cleaning process Were prepared and investigation on their characteristics was performed in this study. The rate of sulfidation increased as the amount of copper oxide in the composite sorbent was raised. TPO experiments were carried out to investigate the characteristics of the regeneration of the sorbents with severa1 different ratios of Zno to CuO. Copper sulfate was formed at temperatures above $400^{\circ}C$, while it was decomposed by pyrolysis above $700^{\circ}C$. $SO_2$ slippage due to $CuSO_4$ was observed in the sorbent regenerated at temperatures above $600^{\circ}C$. However, it was not observed when regenerated above $700^{\circ}C$. It was confirmed in the ZnO-CuO mixed sorbent system that CuO suppressed the vaporization of ZnO on the one hand and Zno minimized the $SO_2$ slippage due to CuO on the other hand.

고온 연료가스 정제를 위하여 ZnO-CuO 혼합탈황제를 제조하였으며, 탈황제들의 반응특성을 조사하였다. ZnO와 CuO의 혼합비율에 따른 황화반응 속도는 CuO의 함량이 증가할수록 빨라졌다. ZnO와 CuO 비율을 달리한 각 탈황제의 재생특성을 조사하기 위하여 TPO실험을 수행한 결과, $400^{\circ}C$ 이상에서 $CuSO_4$가 생성되고 $700^{\circ}C$ 이상에서 $CuSO_4$가 열분해 됨을 알았다. $600^{\circ}C$에서 재생된 탈황제는 $CuSO_4$에 의한$SO_2$ slippage 현상이 관찰되었으나, $700^{\circ}C$에서 재생할 경우에는 $SO_2$ slippage가 관찰되지 않았다. 이로써 ZnO와 CuO의 혼합으로 CuO는 ZnO의 휘발을 억제하고, ZnO는 CuO에 대한 $SO_2$ slippage를 최소화 시켰다.

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