Structure-Sensitive Behavior of Supported Vanadia-Based Catalysts for Combustion of Soot

Catalytic performance of 3 and 5 wt.% of vanadia, supported on zirconia, zirconia-ceria, and zirconia-yttria, tested in the combustion of soot without and in the presence of NO was described. The catalysts were characterized by structural (XRD, RS) and functional (EPR, TPR) methods. The effect of co...

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Bibliographic Details
Published in:Catalysts 2023-11, Vol.13 (11), p.1406
Main Authors: Rzadki, Tomasz, Legutko, Piotr, Adamski, Andrzej, Kotarba, Andrzej, Trawczyński, Janusz
Format: Article
Language:English
Subjects:
Catalysts
Catalytic activity
Catalytic oxidation
Cerium
Cerium oxides
Combustion
Combustion temperature
Composition effects
Diesel engines
Engines
Heat treatment
Nitric oxide
Oxidation
Soot
Temperature
Yttrium oxide
Zirconium dioxide
Zirconium oxide
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Summary:Catalytic performance of 3 and 5 wt.% of vanadia, supported on zirconia, zirconia-ceria, and zirconia-yttria, tested in the combustion of soot without and in the presence of NO was described. The catalysts were characterized by structural (XRD, RS) and functional (EPR, TPR) methods. The effect of composition on the catalytic performance of the investigated systems in soot combustion was discussed in detail. Zirconia-supported vanadia was found to be the most active catalyst for soot oxidation characterized by the lowest combustion temperature (~375 °C) attributed to the maximal signal of conversion to the detected products. The relationship between the reducibility of surface oxovanadium species and their catalytic activity was established, revealing the involvement of the lattice oxygen in the combustion process. The importance of thermal treatment conditions and the nature of zirconia-based support determining the stability of specific oxovanadium entities on the catalyst surface was emphasized.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal13111406