3. Thermal Stability of Cordierite Supported V2O5-WO3-T1O2 SCR CATALYST for Diesel NOx Reduction

  1. Manuel E. Brito,
  2. Peter Filip,
  3. Charles Lewinsohn,
  4. Ali Sayir,
  5. Mark Opeka and
  6. William M. Mullins
  1. Yuming Xie1,
  2. Christophe Remy2,
  3. Isabelle Melscoet-Chauvel3 and
  4. Tinghong Tao4

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291283.ch3

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

How to Cite

Xie, Y., Remy, C., Melscoet-Chauvel, I. and Tao, T. (2005) Thermal Stability of Cordierite Supported V2O5-WO3-T1O2 SCR CATALYST for Diesel NOx Reduction, in Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8 (eds M. E. Brito, P. Filip, C. Lewinsohn, A. Sayir, M. Opeka and W. M. Mullins), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291283.ch3

Author Information

  1. 1

    Corning Incorporated SP-DV-01–9 Coming, NY 14831

  2. 2

    Corning S.A.S. 7bis, Avenue de Valvins 77210 Avon, France

  3. 3

    Corning Incorporated SP-DV-02–01 Corning, NY 14831

  4. 4

    Corning Incorporated SP-DV-02–01 Corning, NY 14831

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982619

Online ISBN: 9780470291283

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Keywords:

  • mechanism;
  • temperature;
  • cordiente;
  • material;
  • ammonium

Summary

Thermal stability of cordierite supported and extruded SCR catalysts was evaluated and a mechanism was developed to explain the observed differences. These catalyst systems are used to reduce NOx in diesel engine exhaust to meet European and US requirements. The cordierite supported catalyst showed significantly better catalytic conversion efficiency after aging at 650°C than the extruded catalyst, although low temperature activity was compromised because of the lower catalyst loading of the cordierite supported catalyst. Characterization of the supported catalyst indicated that the catalyst had very little surface area loss upon aging and maintained most of its acidity. In contrast, the extruded catalyst showed dramatic surface area and acidity loss. The acidity correlates with catalytic activity, confirming that the reaction kinetics are controlled by the availability of V-OH sites at the temperature range.