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Microréacteur pour la catalyse hétérogène
Applications : Stockage d'hydrogène dans les hydrocarbures Filtre pour capteur gaz

Abstract : This manuscript presents the design and the use of silicon microstructured reactor for heterogeneous catalysis and especially for the dehydrogenation of methylcyclohexane reaction. This reaction enables on one hand to store hydrogen and on the other hand to realise technological developments since it is endothermic and difficult to carry out. By consequence, a new microreactor obtained by DRIE was designed and capped with a Pyrex wafer. It bundles microheaters deposited by screen-printing and a high temperature metallic connection. It comprises either a catalyst coming from microtechnology, Pt film deposited by sputtering or a classic catalyst, platinum supported on alumina. For this last catalyst, the microreactor previously preoxidised is pretraited by oxygen plasma or liquid way so that the deposit to walls. The washcoat could be done in open microreactor by dip coating in the suspension or in closed microreactor under vacuum or by liquid circulation. After catalytic tests realised in a macroreactor, the Pt/Al2O3 catalyst was chosen to be inserted in the microreactor. The catalytic tests realised in a microreactor coupled with a mass spectrometer let to show the presence of hydrogen. In parallel, the microreactor was used as filter to improve gas sensor selectivity.
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https://tel.archives-ouvertes.fr/tel-00012119
Contributor : Andrée-Aimée Toucas <>
Submitted on : Tuesday, April 11, 2006 - 6:11:42 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:32 PM
Long-term archiving on: : Saturday, April 3, 2010 - 10:15:49 PM

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  • HAL Id : tel-00012119, version 1

Citation

Marilyne Roumanie. Microréacteur pour la catalyse hétérogène
Applications : Stockage d'hydrogène dans les hydrocarbures Filtre pour capteur gaz. Génie des procédés. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2005. Français. ⟨tel-00012119⟩

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