Topics in Catalysis

, Volume 56, Issue 1–8, pp 157–164 | Cite as

Promising Stability of Gold-Based Catalysts Prepared by Direct Anionic Exchange for DeNO x Applications in Lean Burn Conditions

  • D.-L. Nguyen
  • S. Umbarkar
  • M. K. Dongare
  • C. Lancelot
  • J.-S. Girardon
  • C. Dujardin
  • P. Granger
Original Paper
First Online:

Abstract

Supported gold catalysts on γ-Al2O3 have been investigated in the catalytic reduction of NO x in simulated Diesel exhaust gas conditions. Different parameters have been examined essentially the mode of gold incorporation via classical deposition–precipitation and anionic exchange methods and the nature of the pre-activation thermal treatment. The resistance to thermal ageing under reactive conditions at 500 °C was found completely different with a significant rate enhancement on anionic-exchange samples. Further comparisons also show that the nature of the pre-activation thermal treatment influences the extent of surface reconstructions during thermal ageing with a detrimental effect of reductive pre-treatment on the catalytic performances.

Keywords

Au/Al2O3 catalyst Anionic-exchange Deposition–precipitation NOx abatement Selective catalytic reduction 
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Notes

Acknowledgments

We would like to thank the CNRS which stimulates this research project through the International Associate Laboratory between UCCS and NCL with a Ph’D fellowship (D.L. Nguyen). We thank Arnaud Beaurain and A.S. Mamede who conducted XPS measurements.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • D.-L. Nguyen
    • 1
  • S. Umbarkar
    • 2
  • M. K. Dongare
    • 2
  • C. Lancelot
    • 1
  • J.-S. Girardon
    • 1
  • C. Dujardin
    • 1
  • P. Granger
    • 1
  1. 1.Université Lille Nord de France, CNRS UMR 8181Unité de Catalyse et de Chimie du Solide–UCCS, USTLVilleneuve d’AscqFrance
  2. 2.National Chemical LaboratoryPuneIndia

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