Topics in Catalysis

, Volume 62, Issue 1–4, pp 56–62 | Cite as

Structural Induced Effect of Potassium on the Reactivity of Vanadate Species in V2O5–WO3/TiO2 SCR-Catalyst

  • H. Siaka
  • C. Dujardin
  • A. Moissette
  • P. GrangerEmail author
Original Paper


A renewed interest of benchmark V2O5/WO3/TiO2 SCR-catalysts is discernible for the depollution of stationary sources jointly with the use of bio-fuels as substitute to fossil fuels. However, the resistance to deactivation has to be reconsidered according to additional alkaline contamination. This study tried to elucidate the impact of potassium on the stability of vanadate and tungstate species at various dispersions for two different K/V ratios equal to 0.2 and 0.8. Different kinetic behaviors of fresh and K-poisoned catalysts have been discussed based on the affinity of potassium to neutralize preferentially strong acid sites as well as to alter the capability of V=O redox sites.


Ammonia V2O5–WO3/TiO2 Standard-SCR Selective Catalytic Reduction NOx 



The authors would like to thank the Region Hauts de France and ADEME for supporting this work through a Ph’D grant (H. Siaka). We greatly acknowledge Dr. Pardis Simon and Olivier Gardoll who conducted XPS measurements and thermal analysis.

Supplementary material

11244_2018_1103_MOESM1_ESM.docx (36 kb)
Supplementary material 1 (DOCX 35 KB)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • H. Siaka
    • 1
  • C. Dujardin
    • 1
  • A. Moissette
    • 2
  • P. Granger
    • 1
    Email author
  1. 1.Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 -UCCS - Unité de Catalyse et Chimie du SolideLilleFrance
  2. 2.Univ. Lille, Laboratoire de Spectrochimie Infrarouge et Raman, UMR CNRS 8516Villeneuve d’AscqFrance

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