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Theses

Développement de catalyseurs à base d'oxyde de molybdène ou de vanadium supporté sur silice pour l'oxydation ménagée du méthane en formaldéhyde.

Abstract : The most promising silica supported molybdenum or vanadium oxide type catalysts have been studied and developed within the perspective of an industrial application for the direct synthesis of formaldehyde by partial oxidation of methane. An economic study has enabled an evaluation of the catalytic performances needed to obtain a competitive process in comparison with the actual three-step process of formaldehyde production.
Catalysts have been prepared and tested and different ways to enhance their catalytic performances investigated. Several techniques (Raman, IR and XANES spectroscopies, TPR, ESR...) have been used to determine the structure of the catalysts and the nature of the catalytic sites. A reaction mechanism has been suggested for the VOx/SiO2 catalyst, in which methane activates on O- ions resulting from a charge transfer with vanadium.
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Theses
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https://tel.archives-ouvertes.fr/tel-00011544
Contributor : Hélène Launay <>
Submitted on : Monday, February 6, 2006 - 2:14:34 PM
Last modification on : Thursday, January 11, 2018 - 6:14:45 AM
Long-term archiving on: : Monday, September 17, 2012 - 11:45:40 AM

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  • HAL Id : tel-00011544, version 1

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Hélène Launay. Développement de catalyseurs à base d'oxyde de molybdène ou de vanadium supporté sur silice pour l'oxydation ménagée du méthane en formaldéhyde.. Catalyse. Université Claude Bernard - Lyon I, 2005. Français. ⟨tel-00011544⟩

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