Characterization of V/TiO2 Catalysts for Selective Reduction

V/TiO2 촉매의 선택적 촉매 환원 반응특성 연구

  • Lee, Sang-Jin (Department of Environmental Engineering, Kyonggi University) ;
  • Hong, Sung-Chang (Department of Environmental Engineering, Kyonggi University)
  • Received : 2008.06.23
  • Accepted : 2008.07.22
  • Published : 2008.10.10

Abstract

The present work studied the selective catalytic reduction (SCR) of NO to $N_2$ by $NH_3$ over $V/TiO_2$ focusing on NOx control for the stationary sources. The SCR process depends mainly on the catalyst performance. The reaction characteristics of SCR with $V/TiO_2$ catalysts were closely examined at low and high temperature. In addition, adsorption and desorption characteristics of the reactants on the catalyst surface were investigated with ammonia. Seven different $TiO_2$ supports containing the same loading of vanadia were packed in a fixed bed reactor respectively. The interaction between $TiO_2$ and vanadia would form various non-stoichiometric vanadium oxides, and showed different reaction activities. There were optimum calcination temperatures for each samples, indicating different reactivity. It was finally found from the $NH_3-TPD$ test that the SCR activity was nothing to do with $NH_3$ adsorption amount.

Acknowledgement

Supported by : 경기대학교

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