Investigation of the elimination of VOC mixtures over a Pd-loaded V-doped TiO2 support

T. Barakat, J. C. Rooke, R. Cousin, J. F. Lamonier, J. M. Giraudon, B. L. Su, S. Siffert

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The removal of a butanone-toluene mixture over Pd/5%V-TiO2 and Pd/TiO2 catalysts has been investigated. The V-doped sample showed a higher performance in the oxidation of butanone and also a butanone-toluene mixture, which was attributed to competition between oxygen species and VOCs on vanadium adsorption sites. However in the presence of both VOCs, Pd/5%V-TiO 2 showed a higher performance than in the elimination of butanone alone. An operando DRIFT experiment coupled with a mass spectrometer revealed that both VOCs compete in terms of adsorption on the surface of the catalyst. However, toluene adsorption is decreased by MEK, meaning that the latter oxidizes more easily into its by-products, whose combustion causes variations in the surface temperature of the catalyst, thus enhancing the oxidation of toluene molecules present in the gaseous stream.

langue originaleAnglais
Pages (de - à)2066-2074
Nombre de pages9
journalNew Journal of Chemistry
Volume38
Numéro de publication5
Les DOIs
étatPublié - 1 janv. 2014

Empreinte digitale

Butanones
Toluene
Volatile organic compounds
Adsorption
Catalysts
Oxidation
Vanadium
Mitogen-Activated Protein Kinase Kinases
Mass spectrometers
Byproducts
Oxygen
Molecules
Experiments
Temperature

Citer ceci

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abstract = "The removal of a butanone-toluene mixture over Pd/5{\%}V-TiO2 and Pd/TiO2 catalysts has been investigated. The V-doped sample showed a higher performance in the oxidation of butanone and also a butanone-toluene mixture, which was attributed to competition between oxygen species and VOCs on vanadium adsorption sites. However in the presence of both VOCs, Pd/5{\%}V-TiO 2 showed a higher performance than in the elimination of butanone alone. An operando DRIFT experiment coupled with a mass spectrometer revealed that both VOCs compete in terms of adsorption on the surface of the catalyst. However, toluene adsorption is decreased by MEK, meaning that the latter oxidizes more easily into its by-products, whose combustion causes variations in the surface temperature of the catalyst, thus enhancing the oxidation of toluene molecules present in the gaseous stream.",
author = "T. Barakat and Rooke, {J. C.} and R. Cousin and Lamonier, {J. F.} and Giraudon, {J. M.} and Su, {B. L.} and S. Siffert",
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Investigation of the elimination of VOC mixtures over a Pd-loaded V-doped TiO2 support. / Barakat, T.; Rooke, J. C.; Cousin, R.; Lamonier, J. F.; Giraudon, J. M.; Su, B. L.; Siffert, S.

Dans: New Journal of Chemistry, Vol 38, Numéro 5, 01.01.2014, p. 2066-2074.

Résultats de recherche: Contribution à un journal/une revueArticle

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AU - Barakat, T.

AU - Rooke, J. C.

AU - Cousin, R.

AU - Lamonier, J. F.

AU - Giraudon, J. M.

AU - Su, B. L.

AU - Siffert, S.

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AB - The removal of a butanone-toluene mixture over Pd/5%V-TiO2 and Pd/TiO2 catalysts has been investigated. The V-doped sample showed a higher performance in the oxidation of butanone and also a butanone-toluene mixture, which was attributed to competition between oxygen species and VOCs on vanadium adsorption sites. However in the presence of both VOCs, Pd/5%V-TiO 2 showed a higher performance than in the elimination of butanone alone. An operando DRIFT experiment coupled with a mass spectrometer revealed that both VOCs compete in terms of adsorption on the surface of the catalyst. However, toluene adsorption is decreased by MEK, meaning that the latter oxidizes more easily into its by-products, whose combustion causes variations in the surface temperature of the catalyst, thus enhancing the oxidation of toluene molecules present in the gaseous stream.

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