Catalysis Letters

, Volume 91, Issue 1–2, pp 19–24 | Cite as

Fourier Transform IR Study of NO + CH4 + O2 Coadsorption on In-ZSM-5 DeNOx Catalyst

  • Andrea R. Beltramone
  • Liliana B. Pierella
  • Felix G. Requejo
  • Oscar A. Anunziata

Abstract

Reactivity of the NO and NO2 adspecies in the coadsorption of NO with CH4 and O2, and the effect of Si/Al ratio of In-ZSM-5 were studied by FTIR in situ. The relation between the adsorbed species and catalytic activity in the SCR of NOx to N2 was also investigated. The adsorption of NO over this catalyst was performed at room temperature with pure NO followed by purging with vacuum. When NO was introduced to the samples, three peaks were observed by FTIR: 1622 and 1575 cm-1, which can be assigned to adsorbed (ONO)- over InO+ site and NO2 over InO+ site, respectively, and at 1680 cm-1 corresponding to NO3--H. Coadsorption of nitrogen monoxide, methane and oxygen at room temperature of the samples with Si/Al ratio of 17(a), 27(b) and 50(c), allowed us to determine that sample (b) has large amount of NO2–InO+ adsorbed species, which are the most important intermediates in the SCR of NOx. The bands at 1575 and 1680 cm-1 are more intense in samples (a) and (c). When the coadsorption of the mixture was performed at 400 °C, we can see that the adsorbed species are larger in sample (b). Taking into account the catalytic performance of the catalysts and the PAC results obtained by us earlier, this last indium specie, only present in the sample with Si/Al = 27, should be associated with the catalytic active specie for the SCR of NOx.

NOx and methane adsorption FTIR intermediate species 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    K. Krauskopf and A. Beiser, The Physical Universe (McGraw-Hill, New York, 1991).Google Scholar
  2. [2]
    H. Bosch and F. Jansen, Catal. Today 2 (1978) 1.Google Scholar
  3. [3]
    F. Boer, L. Hegedus, T. Gouker and K. Zak, Chem. Tech. (1990) 312.Google Scholar
  4. [4]
    J. Marangozis, Ind. Eng. Chem. Res. 31 (1992) 1.Google Scholar
  5. [5]
    S. Cho, Chem. Eng. Prog. 90 (1994) 39.Google Scholar
  6. [6]
    H. Schneider, S. Tschudin, M. Schneider, A. Wokaun and A. Baker, J. Catal. 147 (1994) 5.Google Scholar
  7. [7]
    M. Iwamoto, S. Yokoo, K. Sakai and S. Kahawa, J. Chem. Soc., Faraday Trans. 1 (1981) 1629.Google Scholar
  8. [8]
    M. Iwamoto and H. Hamada, Catal. Today 10 (1991) 57.Google Scholar
  9. [9]
    Y. Li and J. Armor, Appl. Catal. B1 (1992) L31.Google Scholar
  10. [10]
    J. Petunchi and W. Keith Hall, Appl. Catal. B 2 (1993) L17.Google Scholar
  11. [11]
    Y. Traa, B. Burger and J. Weitkamp, Microporous Mesoporous Mater. 30 (1999) 3.Google Scholar
  12. [12]
    G. Ertl, H. Knozinger and J. Weitkamp (eds), Handbook of Heterogeneous Catalysis, Chapter 1, Vol 4 (VCH Verlagsgesellschaft mbH, Weinheim, Federal Republic of Germany, 1997).Google Scholar
  13. [13]
    E. Kikuchi and K. Yogo, Catal. Today 22 (1994) 73.Google Scholar
  14. [14]
    M. Richter, H. Berndt, R. Fricke and B. Lucke, in Proceedings of the DGMK Conference on Catalysis on Solid Acid and Bases, J. Weitkamp and B. Lucke (eds) (Hamburg, 1996) p. 283.Google Scholar
  15. [15]
    X. Zhou, T. Zhang, Z. Xu and L. Lin, Catal. Lett. 40 (1996) 35.Google Scholar
  16. [16]
    M. Ogura, M. Hayashi and E. Kikuchi, Catal. Today 42 (1998) 159.Google Scholar
  17. [17]
    E. Kikuchi, M. Ogura, N. Aratani, Y. Sugiura, S. Hiromoto and K. Yogo, Catal. Today 27 (1996) 327.Google Scholar
  18. [18]
    E. Kikuchi, M. Ogura, I. Teresaki and Y. Goto, J. Catal. 161 (1996) 131.Google Scholar
  19. [19]
    F. Requejo, J. Ramallo-López, E. Lede, E. Miro, L. Pierella and O. Anunziata, Catal. Today 54 (1999) 553.Google Scholar
  20. [20]
    J. Desimoni, A. Bibiloni, L. Mendoza, Z. A. Pasquevich, F. Sanchez and A. G. López, Phys. Rev. B28 (1983) 5739.Google Scholar
  21. [21]
    O. Anunziata, L. Pierella and R. Marino. Appl. Catal. A165 (1997) 35.Google Scholar
  22. [22]
    R. Long and R. Yang, J. Catal. 194 (2000) 80.Google Scholar
  23. [23]
    J. Szanyi and M. Paffett, J. Catal. 164 (1996) 232.Google Scholar
  24. [24]
    H. Chen, El-Malki, X. Wang, R. van Santen and W. Sachtler, J. Mol. Catal. A162 (2000) 159.Google Scholar
  25. [25]
    J. Desimoni, A. Bibiloni, L. Mendoza, Z. A. Pasquevich, F. Sanchez and A. G. López, Phys. Rev. B28 (1983) 5739.Google Scholar

Copyright information

© Plenum Publishing Corporation 2003

Authors and Affiliations

  • Andrea R. Beltramone
    • 1
  • Liliana B. Pierella
    • 1
  • Felix G. Requejo
    • 1
  • Oscar A. Anunziata
    • 1
  1. 1.Grupo Fisicoquímica de Nuevos Materiales /Centro de Investigación y Tecnología Química (CITeQ)Universidad Tecnológica Nacional, Facultad Regional CórdobaCórdobaArgentina

Personalised recommendations