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The mechanism of reduction of NO with H2 in strongly oxidizing conditions (H2-SCR) on a novel Pt/MgO-CeO2 catalyst: Effects of reaction temperature

  • III International Conference “Catalysis: Fundamentals and Applications”
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Abstract

Steady State Isotopic Transient Kinetic Analysis (SSITKA) experiments using on-line Mass Spectrometry (MS) and in situ Diffuse Reflectance Infrared Fourier-Transform Spectroscopy (DRIFTS) have been performed to study essential mechanistic aspects of the Selective Catalytic Reduction of NO by H2 under strongly oxidizing conditions (H2-SCR) in the 120–300°C range over a novel 0.1 wt % Pt/MgO-CeO2 catalyst. The N-path of reaction from NO to the N2 gas product was probed by following the 14NO/H2O2 → 15NO/H2/O2 switch (SSITKA-MS and SSITKA-DRIFTS) at 1 bar total pressure. It was found that the N-pathway of reaction involves the formation of two active NO x species different in structure, one present on MgO and the other one on the CeO2 support surface. Inactive adsorbed NO x species were also found on both the MgO-CeO2 support and the Pt metal surfaces. The concentration (mol/g cat) of active NO x leading to N2 was found to change only slightly with reaction temperature in the 120–300°C range. This leads to the conclusion that other intrinsic kinetic reasons are responsible for the volcano-type conversion of NO versus the reaction temperature profile observed.

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References

  1. Ertl, G., Knozinger, H., and Weitkamp, J., Handbook of Heterogeneous Catalysis, Weinheim: VCH, 1997, p. 1633.

    Google Scholar 

  2. Nakajima, F. and Hamada, I., Catal. Today, 1996, vol. 29, p. 109.

    Article  CAS  Google Scholar 

  3. Gutberlet, H. and Schallert, B., Catal. Today, 1993, vol. 16, p. 207.

    Article  CAS  Google Scholar 

  4. Fritz, A. and Pitchon, V., Appl. Catal., B, 1997, vol. 13, p. 1.

    Article  CAS  Google Scholar 

  5. Parvulesku, V.I., Grange, P., and Delmon, B., Catal. Today, 1998, vol. 46, p. 233.

    Article  Google Scholar 

  6. Busca, G., Lietti, L., Ramis, G., and Berti, F., Appl. Catal., B, 1998, vol. 18, p. 1.

    Article  CAS  Google Scholar 

  7. Burch, R., Breen, J.P., and Meunier, F.C., Appl. Catal., B, 2002, vol. 39, p. 283.

    Article  CAS  Google Scholar 

  8. Armor, J.N., Catal. Today, 1997, vol. 38, p. 163.

    Article  CAS  Google Scholar 

  9. Costa, C.N., Savva, P.G., Andronikou, C., Lambrou, P., Polychronopoulou, K., Belessi, V.C., Stathopoulos, V.N., Pomonis, P.J., and Efstathiou, A.M., J. Catal., 2002, vol. 209, p. 456.

    Article  CAS  Google Scholar 

  10. Costa, C.N., Stathopoulos, V.N., Belessi, V.C., and Efstathiou, A.M., J. Catal., 2001, vol. 197, p. 350.

    Article  CAS  Google Scholar 

  11. Costa, C.N. and Efstathiou, A.M., Environ. Chem. Lett., 2004, vol. 2, p. 55.

    Article  CAS  Google Scholar 

  12. Efstathiou, A.M., Costa, C.N., and Fierro, J.L.G., US Patent 7105137 B2, 2006; Eur. Patent 1475 149 B1, 2008.

  13. Costa, C.N. and Efstathiou, A.M., Appl. Catal., B, 2007, vol. 72, p. 240.

    Article  CAS  Google Scholar 

  14. Costa, C.N., Savva, P.G., Fierro, J.L.G., and Efstathiou, A.M., Appl. Catal., B, 2007, vol. 75, p. 147.

    Article  CAS  Google Scholar 

  15. Balakrishnan, K. and Gonzalez, R.D., J. Catal., 1993, vol. 144, p. 395.

    Article  CAS  Google Scholar 

  16. Costa, C.N., Anastasiadou, T., and Efstathiou, A.M., J. Catal., 2000, vol. 194, p. 250.

    Article  CAS  Google Scholar 

  17. Costa, C.N., Christou, S.Y., Georgiou, G., and Efstathiou, A.M., J. Catal., 2003, vol. 219, p. 259.

    Article  CAS  Google Scholar 

  18. Klingenberg, B. and Vannice, M.A., Appl. Catal., B, 1999, vol. 21, p. 19.

    Article  CAS  Google Scholar 

  19. Hadjiivanov, K.I., Catal. Rev. Sci. Eng., 2000, vol. 42, p. 71.

    Article  CAS  Google Scholar 

  20. Costa, C.N. and Efstathiou, A.M., J. Phys. Chem. C, 2007, vol. 111, p. 3010.

    Article  CAS  Google Scholar 

  21. Savva, P.G. and Efstathiou, A.M., J. Catal., 2008, vol. 257, p. 324.

    Article  CAS  Google Scholar 

  22. Hadjiivanov, K., Bushev, V., Kantcheva, M., and Klissurski, D., Langmuir, 1994, vol. 10, p. 464.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Chemistry Department, Heterogeneous Catalysis Laboratory, University of Cyprus, P.O. Box 20537, 1678, Nicosia, Cyprus

    P. G. Savva, C. N. Costa & A. M. Efstathiou

Authors
  1. P. G. Savva
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  2. C. N. Costa
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  3. A. M. Efstathiou
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Corresponding author

Correspondence to A. M. Efstathiou.

Additional information

Published in Russian in Kinetika i Kataliz, 2008, Vol. 49, No. 5, pp. 779–783.

The text was submitted by the authors in English.

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Savva, P.G., Costa, C.N. & Efstathiou, A.M. The mechanism of reduction of NO with H2 in strongly oxidizing conditions (H2-SCR) on a novel Pt/MgO-CeO2 catalyst: Effects of reaction temperature. Kinet Catal 49, 743–747 (2008). https://doi.org/10.1134/S0023158408050200

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  • DOI: https://doi.org/10.1134/S0023158408050200

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