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Topics in Catalysis

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04-12-2018 | Original Paper

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

Authors: H. Siaka, C. Dujardin, A. Moissette, P. Granger

Published in: Topics in Catalysis | Issue 1-4/2019

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Abstract

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.

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Title: Structural Induced Effect of Potassium on the Reactivity of Vanadate Species in V2O5–WO3/TiO2 SCR-Catalyst
Authors: H. Siaka
C. Dujardin
A. Moissette
P. Granger
Publication date: 04-12-2018
Publisher: Springer US
Published in: Topics in Catalysis / Issue 1-4/2019
Print ISSN: 1022-5528
Electronic ISSN: 1572-9028
DOI: https://doi.org/10.1007/s11244-018-1103-2

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