Characterisation of new Pd / hierarchical macro-mesoporous ZrO2, TiO2 and ZrO2-TiO2 catalysts for toluene total oxidation

H. L. Tidahy, S. Siffert, J. F. Lamonier, E. A. Zhilinskaya, A. Aboukaïs, Z. Y. Yuan, A. Vantomme, B. L. Su, X. Canet, G. Deweireld, M. Frère

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Résumé

Amorphous (macro)-mesoporous ZrO2, TiO2 and ZrO 2-TiO2 have been synthesised and characterised for volatile organic compounds (VOCs) catalytic oxidation. These solids used as catalytic supports present high surface areas. The stability of the porous structure after the calcination at 400°C is observed for ZrO 2-TiO2 and TiO2 but partial breakdown of the structure occurred for ZrO2 by the crystallisation to tetragonal phase. All these Pd impregnated solids are found to be powerful catalysts for total oxidation of toluene. Pd/TiO2 presents the highest catalytic potential. The lowest toluene adsorption enthalpy, the low coke content observed after the catalytic test and the highest pore diameter leading to palladium particles more accessible and reducible should explain the interesting catalytic behaviour of Pd/TiO2.

langue originaleAnglais
Pages (de - à)201-208
Nombre de pages8
journalStudies in surface science and catalysis
Volume160
Etat de la publicationPublié - 1 janv. 2007

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