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Oxydation des composés organiques volatils en présence de catalyseurs Au et/ou Pd déposé sur TiO₂ nanostructuré dopé

Abstract : In this work, the total oxidation of toluene and butanone over noble metal loaded doped titanium oxide supports has been investigated. The study focused firstly on showing the effect of doping a macro-mesoporous titania with metal oxide supports in the oxidation of VOCs. It seems that doping enhances the performance of the used solid in VOC oxidation reactions. We proved that this increase can be directly related to interactions between the dopants and the support. Then, an active phase made of noble metals has been loaded onto both best performing doped materials as to study the role played by this active phase in oxidation reactions. It appears that the presence of noble metals increases the catalytic performance of prepared materials and reduces the formation of toxic by-products such as CO. Butanone elimination proved to be harder that toluene oxidation, whereas when catalysts were exposed to a mixture of toluene and butanone, the presence of both VOCs prompted a competitive effect in the adsorption of both molecules onto the support, which facilitated their oxidation rate. An FTIR operando study illustrated the changes occuring in used catalysts in the oxidation of the VOC mixture, and verified the existence of this competitive effect.
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https://tel.archives-ouvertes.fr/tel-00916578
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Submitted on : Tuesday, December 10, 2013 - 2:29:59 PM
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  • HAL Id : tel-00916578, version 1

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Tarek Barakat. Oxydation des composés organiques volatils en présence de catalyseurs Au et/ou Pd déposé sur TiO₂ nanostructuré dopé. Autre. Université du Littoral Côte d'Opale, 2012. Français. ⟨NNT : 2012DUNK0331⟩. ⟨tel-00916578⟩

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