Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on Characterization for Low Temperature SCR Reaction by $Mn/TiO_2$ Catalysts with Using a Various Commercial $TiO_2$ Support

다양한 상용 $TiO_2$ 담체를 이용한 $Mn/TiO_2$ 촉매의 저온 SCR 반응 특성 연구

  • Kwon, Dong Wook (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Choi, Hyun Jin (Department of Green Process R&D, Green Chemistry & Manufacturing System Division, Korea Institute of Industrial Technology) ;
  • Park, Kwang Hee (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University)
  • 권동욱 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 최현진 (한국생산기술연구원 청정생산시스템연구본부) ;
  • 박광희 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 홍성창 (경기대학교 일반대학원 환경에너지시스템공학과)
  • Published : 2012.04.10
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Abstract

10 wt% Mn supported on various commercial $TiO_2$ catalysts were prepared by wet-impregnation method for the low temperature selective catalytic reduction (SCR) of NO with $NH_3$. A combination of various physico-chemical techniques such as BET, XRD, XPS and TPR were used to characterize these catalysts. MnOx surface densities on MnOx/$TiO_2$ catalyst were related to surface area. As MnOx surface density lowered with high dispersion, the SCR activity for low temperature was increased and the reduction temperature ($MnO_2$ ${\rightarrow}$ $Mn_2O_3$) of surface MnOx was lower. For a high SCR, MnOx could be supported on a high surface area of $TiO_2$ and should be existed a high dispersion of non-crystalline species.

다양한 상용 $TiO_2$ 담체를 이용한 10 wt%의 Mn계 촉매를 습윤함침법으로 제조하여 $NH_3$에 의한 NO의 저온 선택적 촉매환원법(SCR) 반응 특성을 연구하였다. 촉매의 특성은 BET, XRD, XPS 그리고 TPR과 같은 물리화학적 분석을 통해 수행되었다. MnOx/$TiO_2$ 촉매의 MnOx 표면밀도는 비표면적에 영향을 받는다. 고분산된 망간산화물에 의한 낮은 MnOx surface density로 저온 SCR 활성이 증가하고 망간산화물의 $MnO_2$에서 $Mn_2O_3$로 환원되는 온도가 감소되었다. 우수한 SCR활성을 위해서는 망간산화물을 높은 비표면적을 가진 $TiO_2$에 담지되어야 하고 고분산된 비정질종이 존재해야 한다.

Keywords

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