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)
  • 이상진 (경기대학교 환경공학과) ;
  • 홍성창 (경기대학교 환경공학과)
  • 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.

Keywords

SCR;calcination;$NH_3-TPD$;catalyst

Acknowledgement

Supported by : 경기대학교

References

  1. L. Lietti, J. L. Alemany, P. Forzatti, G. Busca, G. Ramis, E. Giamello, and F. Bregani, Catal. Today, 29, 143 (1996) https://doi.org/10.1016/0920-5861(95)00250-2
  2. H. Bosch and F. Janssen, Catal. Today, 2, 369 (1988) https://doi.org/10.1016/0920-5861(88)80002-6
  3. Y. G. Lee, M. S. Thesis, Pohang University of Science & Technology, Pohang, Korea (1999)
  4. V. K. Sharma, A. Wokaun, and A. Baiker, J. Phys. Chem., 90, 2715 (1986) https://doi.org/10.1021/j100403a031
  5. N. I. Il'chenko and G. S. Golodets, J. Catal., 39, 73 (1975) https://doi.org/10.1016/0021-9517(75)90283-3
  6. J. Y. Lee, Ph. D. Dissertation, Korea University, Seoul, Korea (2001)
  7. H. Kamata, K. Takahashi, and C. U. I. Odenbrand, J. Mol. Catal. A-Chem., 139, 189 (1999) https://doi.org/10.1016/S1381-1169(98)00177-0
  8. G. Cristallo, E. Roncari, A. Rinaldo, and F. Trifiro, Appl. Catal. A: General., 209, 249 (2001) https://doi.org/10.1016/S0926-860X(00)00773-0
  9. J. M. G. Amores, V. S. Escribano, G. Ramis, and G. Busca, Appl. Catal., 13, 45 (1997) https://doi.org/10.1016/S0926-3373(96)00092-6
  10. S. H. Moon, Ph. D. Dissertation, Seoul National University, Seoul, Korea (1996)
  11. R. A. Rajadhayaksha and H. Knozinger, Appl. Catal., 51, 81 (1989) https://doi.org/10.1016/S0166-9834(00)80197-9
  12. N. I. Il'chenko and G. S. Golodets, J. Catal., 39, 57 (1975) https://doi.org/10.1016/0021-9517(75)90282-1
  13. A. Miyamoto, K. Kobayashi, M. Inomata, and Y. Murakami, J. Phys. Chem., 86, 2945 (1982) https://doi.org/10.1021/j100212a027
  14. Y. I. Bae, I. J. Doo, E. H. Park, and J. L. Son, J. Korean Ind. Eng. Chem., 6, 849 (1995)