Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on the Oxygen Behavior Characterization of V2O5/TiO2 Catalysts by Ball Milling

V2O5/TiO2 촉매의 Ball Milling에 따른 산소 거동 특성 연구

  • Kwon, Dong Wook (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Park, Kwang Hee (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Lee, Sang Moon (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University) ;
  • Jang, Du Hun (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) ;
  • 박광희 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 이상문 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 장두훈 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 홍성창 (경기대학교 일반대학원 환경에너지시스템공학과)
  • Received : 2011.07.11
  • Accepted : 2011.09.06
  • Published : 2011.12.10
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Abstract

We study on the oxygen behavior of $V_2O_5/TiO_2$ catalysts in the $NH_3$-selective catalytic reduction (SCR) prepared by the ball milling processing. There are not any changes in crystal structure and surface area of the $TiO_2$ catalyst by ball milling, but the maximal reduction temperature decreased in $H_2$-temperature programmed reduction (TPR) analysis. Experimental observations with various concentrations of oxygen indicate that all catalysts showed a very low NOx conversion rate in the absence of oxygen and the reactivity of ball milled catalyst higher depending on the oxygen. It is occurred because the degree of participation of atmospheric oxygen and lattice oxygen is great than that of the not-milled catalyst.

Ball milling을 이용하여 제조한 $NH_3-SCR$용 $V_2O_5/TiO_2$ 촉매의 산소 거동 특성을 연구하였다. Ball milling으로 인한 촉매 $TiO_2$의 결정구조, 비표면적 변화는 없지만 $H_2-TPR$분석에서는 최대 환원온도가 저온으로 이동한다. 산소농도를 달리한 반응성 실험에서 모든 촉매는 산소가 없을 때 매우 낮은 NOx 전환율을 보이고, 산소 농도에 따라 BMC (Ball Milling Catalyst)의 활성이 더 우수한 경향을 나타낸다. 이는 격자산소와 기상산소의 반응참여 정도가 NMC (No Milling Catalyst) 보다 더 크기 때문이다.

Keywords

Acknowledgement

Grant : 고활성 탈질촉매 공정기술 개발

Supported by : 에너지관리공단

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