화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.23, No.2, 190-194, April, 2012
Export Citation
다양한 상용 TiO2 담체를 이용한 Mn/TiO2 촉매의 저온 SCR 반응 특성 연구
A Study on Characterization for Low Temperature SCR Reaction by Mn/TiO2 Catalysts with Using a Various Commercial TiO2 Support
권동욱, 최현진1, 박광희, 홍성창†
  • 경기대학교 일반대학원 환경에너지시스템공학과
  • 1한국생산기술연구원 청정생산시스템연구본부
Dong Wook Kwon, Hyun Jin Choi1, Kwang Hee Park, and Sung Chang Hong†
  • Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University, Gyeonggi-do 442-760, Korea
  • 1Department of Green Process R&D, Green Chemistry & Manufacturing System Division, Korea Institute of Industrial Technology, Chungnam 331-825, Korea
E-mail:
초록
다양한 상용 TiO2 담체를 이용한 10 wt%의 Mn계 촉매를 습윤함침법으로 제조하여 NH3에 의한 NO의 저온 선택적 촉매 환원법(SCR) 반응 특성을 연구하였다. 촉매의 특성은 BET, XRD, XPS 그리고 TPR과 같은 물리화학적 분석을 통해 수행되었다. MnOx/TiO2 촉매의 MnOx 표면밀도는 비표면적에 영향을 받는다. 고분산된 망간산화물에 의한 낮은 MnOx surface density로 저온 SCR 활성이 증가하고 망간산화물의 MnO2에서 Mn2O3로 환원되는 온도가 감소되었다. 우수한 SCR 활성을 위해서는 망간산화물을 높은 비표면적을 가진 TiO2에 담지되어야 하고 고분산된 비정질종이 존재해야 한다.
10 wt% Mn supported on various commercial TiO2 catalysts were prepared by wet-impregnation method for the low temperature selective catalytic reduction (SCR) of NO with NH3. 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/TiO2 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 (MnO2 → Mn2O3) of surface MnOx was lower. For a high SCR, MnOx could be supported on a high surface area of TiO2 and should be existed a high dispersion of non-crystalline species.
Keywords:SCR;catalyst;manganese oxide;NOx removal
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