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Nature de la synergie plasma-photocatalyseur pour la destruction d'un composé organique volatil type : l'acétylène.

Abstract : The procedures coupling a catalyst and a plasma at atmospheric pressure present a promising solution for atmospheric depolluting; more specifically for the processing of VOCs. In particular, the low energetic cost of this technique is highly interesting for minor concentrations (odor treatments), which are difficult to treat with usual methods. Among the catalysts available for the given purpose, TiO2 (a photocatalyst) is of advantage thanks to its low cost, its non toxicity and especially thank to its excellent selectivity in CO2. The combination with plasma could improve the processing speed which is slow using photocatalysis alone. The plasma/TiO2 synergy has just been studied since 2000. The aim of this work consists in the identification of the mechanisms responsible for this phenomenon. The physical and chemical contributions from the discharge, from porosity and from TiO2's photocatalytic activity were therefore separately scrutinized. In order to accomplish this, an non conventional approach was adopted to study a discharge at atmospheric pressure (DBD) as well as a discharge at low pressure (pulsed DC) permitting the use of infrared laser diagnosctics for in situ measurements resolved in time.
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Submitted on : Tuesday, July 27, 2010 - 10:56:01 AM
Last modification on : Friday, June 19, 2020 - 10:54:03 AM
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  • HAL Id : pastel-00002918, version 1

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Olivier Guaitella. Nature de la synergie plasma-photocatalyseur pour la destruction d'un composé organique volatil type : l'acétylène.. Physique [physics]. Ecole Polytechnique X, 2006. Français. ⟨pastel-00002918⟩

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