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Evaluation de l'activité photocatalytique de catalyseurs déposés sur différents supports ("médias") - Application à la conception d'un photoréacteur pilote.

Abstract : Persistent organic compounds are present as pollutants in wastewaters from industrial plants, landfill leachates, hospital effluents, and many other sources. Thus some oxidation processes are now an essential step of purification of many industrial effluent treatment plants (H2O2/UV, O3/UV). Photocatalysis could be an alternative purification method for the cleaning up of some types of polluted waters because it is a process that can lead to total mineralization of almost every organic compound.
The efficiency of photocatalysis has been demonstrated in small laboratory photoreactors, but the next step and current challenge is to develop a pilot-scale reactor that could be taken as part of an industrial water treatment process.
Photocatalysis is an heterogeneous process that involves adsorption of pollutants on the catalyst surface. Adsorption of phenol (chosen as model pollutant) has thus been studied on powdered or supported TiO2 based catalysts. Then, kinetics and degradation mechanism have been established using a batch reactor and different kinds of photocatalysts. The activity of supported catalysts has been quantified with or without addition of a disrupting organic compound (humic acid). Eventually, the last part of this work is dedicated to the implementation of these supported photocatalysts in a new kind of pilot scale photoreactor witch has been characterised in terms of phenol degradation rate and energetic yield.
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Contributor : Raphaël Huchon <>
Submitted on : Friday, March 30, 2007 - 11:27:07 AM
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Raphaël Huchon. Evaluation de l'activité photocatalytique de catalyseurs déposés sur différents supports ("médias") - Application à la conception d'un photoréacteur pilote.. Autre. Université Claude Bernard - Lyon I, 2006. Français. ⟨tel-00139308⟩

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