Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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The Effect of Oxygen in Low Temperature SCR over Mn/$TiO_2$ Catalyst

Mn/$TiO_2$ 촉매를 이용한 저온 SCR 반응에서 산소의 영향

  • Lee, Sang Moon (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) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Graduate School of Kyonggi University)
  • 이상문 (경기대학교 일반대학원 환경에너지시스템공학과) ;
  • 최현진 (한국생산기술연구원 청정생산시스템연구본부) ;
  • 홍성창 (경기대학교 일반대학원 환경에너지시스템공학과)
  • Published : 2012.02.10
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Abstract

This study presents the effect of oxygen on the $NH_3$ selective catalytic reduction (SCR) by Mn/$TiO_2$ catalyst. The lattice oxygen of catalysts is participate in the low temperature SCR, and the gaseous oxygen directly takes part in the rexoidtion of reduced catalyst. These redox properties of oxygen an play important role in SCR activity and the available capability of lattice oxygen depends on the manganese oxidation state of the catalyst surface. $MnO_2$ species has a higher redox property than that of $Mn_2O_3$ species on deposited $TiO_2$ surface and these manganese oxide states strongly depend on the $TiO_2$ surface area.

본 연구는 Mn/$TiO_2$ 촉매를 이용한 저온 $NH_3$-SCR 반응에서 산소의 역할에 대한 영향을 기술하였다. 촉매의 격자산소는 저온 SCR 반응에 참여하며, 기상의 산소는 환원된 촉매를 재산화 시키는 역할을 한다. 이러한 산소의 redox 특성은 SCR 반응활성에 중요한 요소로 작용하며, 격자산소의 이용능력은 표면에 노출된 망간의 산화상태에 큰 영향을 받는다. $TiO_2$ 담체 표면에 존재하는 Mn이 $MnO_2$의 망간산화물 형태로 존재할 때가 $Mn_2O_3$의 형태로 존재할 때보다 우수한 redox 특성을 가지며, 이러한 망간의 산화상태는 $TiO_2$의 비표면적에 큰 영향을 받는다.

Keywords

References

  1. H. Bosch and F. Jamssen, Catal. Today, 2, 369 (1988). https://doi.org/10.1016/0920-5861(88)80002-6
  2. V. I. Parvulescu, P. Grange, and B. Delmon, Catal. Today, 46, 236 (1998).
  3. P. Forzatti and L. Lietti, Heterogeneous Chem. Rev., 3, 33 (1996). https://doi.org/10.1002/(SICI)1234-985X(199603)3:1<33::AID-HCR54>3.0.CO;2-R
  4. J. L. Alemany, L. Lietti, N. Ferlazzo, P. Forzatti, G. Busca, G. Ramis, E. Giamello, and F. Bregani, J. Catal., 155, 117 (1995). https://doi.org/10.1006/jcat.1995.1193
  5. D. A. Pena, B. S. Uphade, and P. G. Smirniotis, J. Catal., 221, 421 (2004). https://doi.org/10.1016/j.jcat.2003.09.003
  6. S. Roy, B. Viswanath, M. S. Hegde, and G. Madras, J. Phys. Chem. C, 112, 6002 (2008). https://doi.org/10.1021/jp7117086
  7. C. Lahousse, A. Bernier, P. Grange, B. Delmon, P. Papaefthimiou, T. Ioannides, and X. Verykios, J. Catal., 178, 214 (1998). https://doi.org/10.1006/jcat.1998.2148
  8. R. Xu, X. Wang, D. Wang, K. Zhou, and Y. Li, J. Catal., 237, 426 (2006). https://doi.org/10.1016/j.jcat.2005.10.026
  9. X. Tang, Y. Li, X. Huang, Y. Xu, H. Zhu, J. Wang, and W. Shen, Appl. Catal. B; Environ., 62, 265 (2006).
  10. J. F. Li, N. Q. Yan, Z. Qu, S. H. Qiao, S. J. Yang, Y. F. Guo, P. Liu, and J. P. Jia, Environ. Sci. Technol., 44, 426 (2010). https://doi.org/10.1021/es9021206
  11. G. Qi, R. T. Yang, and R. Chang, Appl. Catal. B; Environ., 51, 93 (2004). https://doi.org/10.1016/j.apcatb.2004.01.023
  12. F. Kapteijn, A. D. V. Langeveld, J. A. Moulijn, and A. Andrein, J. Catal., 150, 94 (1994). https://doi.org/10.1006/jcat.1994.1325
  13. P. G. Smirniotis, P. M. Sreekanth, D. A. Pena, and R. G. Jenkins, Ind. Eng. Chem. Res., 45, 6436 (2006). https://doi.org/10.1021/ie060484t
  14. M. Koebel, M. Elsener, and G. Madia, Ind. Eng. Chem. Res., 40, 52 (2001). https://doi.org/10.1021/ie000551y
  15. Zhang-Steenwinkel, J. Beckers, and A. Bliek, Appl. Catal. A: Gen., 235, 79 (2002). https://doi.org/10.1016/S0926-860X(02)00241-7
  16. W. C. Wong, Dissertation, California University, California, USA (1982).