Procédé d'élimination de la pollution de l'air par traitement photocatalytique : application aux COVs

Abstract : Photocatalytic oxidation of airborne contaminants appears to be a promising process for remediation of air polluted by Volatile Organic Compounds (VOCs). The aim of our study is the photocatalytic oxidation of several VOCs using an annular reactor: methylethylketone (MEK), acetone, 1-propanol and triethylamine (TEA). First, the influence of different kinetic parameters such as pollutant concentration, incident light irradiance, contact time and humidity has been studied. A mechanistic pathway has been indeed proposed for each pollutant according to the produced intermediates species detected by GC/MS. Second, the diffusion of hydroxyls radicals OH in gas phase, after photonic activation of TiO2, has been highlighted using Laser-Induced Fluorescence (LIF). For the first time, OH radicals have been detected at atmospheric pressures, close to the major photocatalytic oxidation conditions, leading to the assumption that the photocatalytic degradation of VOCs might be at least partially occurs between pollutants and OH radicals in gas-phase
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Guillaume Vincent. Procédé d'élimination de la pollution de l'air par traitement photocatalytique : application aux COVs. Autre. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL037N⟩. ⟨tel-01752994⟩

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