LrgpV1, Main, Exploration, bibRecordById, pubmed:18571844

Photocatalytic degradation of gaseous 1-propanol using an annular reactor : Kinetic modelling and pathways

Identifieur interne : 000F68 ( Main/Exploration ); précédent : 000F67; suivant : 000F69

Photocatalytic degradation of gaseous 1-propanol using an annular reactor : Kinetic modelling and pathways

Auteurs : G. Vincent [France] ; P. M. Marquaire [France] ; O. Zahraa [France]

Source :

Journal of hazardous materials [ 0304-3894 ] ; 2009.

RBID : Pascal:09-0147586

Descripteurs français

KwdFr :
- Acétaldéhyde (), Adsorption, Aldéhydes (), Catalyse, Chromatographie (), Chromatographie gazeuse-spectrométrie de masse (), Cinétique, Facteurs temps, Gaz, Modèles statistiques, Photochimie (), Polluants atmosphériques (), Polluants atmosphériques (analyse), Propan-1-ol (), Techniques de chimie analytique (), Élimination des déchets liquides ().
MESH :
- analyse : Polluants atmosphériques.
Pascal (Inist)
- Acétaldéhyde, Adsorption, Aldéhydes, Catalyse, Chromatographie, Chromatographie gazeuse-spectrométrie de masse, Cinétique, Dégradation photochimique, Facteurs temps, Gaz, Modèles statistiques, Photochimie, Polluants atmosphériques, Propan-1-ol, Réacteur photochimique, Modèle cinétique, Photocatalyse, Oxydation, Pollution, Décontamination, Composé organique volatil, Réacteur catalytique, Réacteur parfaitement agité, Paramètre cinétique, Polluant, Techniques de chimie analytique, Teneur eau, Produit réaction, Modélisation, Adsorption, Devenir polluant, Élimination des déchets liquides.
Wicri :
- topic : Pollution, Polluant.

English descriptors

KwdEn :
- 1-Propanol (chemistry), Acetaldehyde (chemistry), Adsorption, Air Pollutants (analysis), Air Pollutants (chemistry), Aldehydes (chemistry), Catalysis, Catalytic reactor, Chemistry Techniques, Analytical (methods), Chromatography (methods), Continuous stirred tank reactor, Decontamination, Gas Chromatography-Mass Spectrometry (methods), Gases, Kinetic model, Kinetic parameter, Kinetics, Modeling, Models, Statistical, Oxidation, Photocatalysis, Photochemical degradation, Photochemical reactor, Photochemistry (methods), Pollutant, Pollutant behavior, Pollution, Reaction product, Time Factors, Volatile organic compound, Waste Disposal, Fluid (methods), Water content.
MESH :
- chemical , analysis : Air Pollutants.
- chemical , chemistry : 1-Propanol, Acetaldehyde, Air Pollutants, Aldehydes.
- methods : Chemistry Techniques, Analytical, Chromatography, Gas Chromatography-Mass Spectrometry, Photochemistry, Waste Disposal, Fluid.
- Adsorption, Catalysis, Gases, Kinetics, Models, Statistical, Time Factors.

Abstract

Photocatalytic oxidation of airborne contaminants appears to be a promising process for remediation of air polluted by Volatile Organic Compounds (VOCs). In the present work, the photocatalytic oxidation of gaseous 1-propanol has been investigated by using an annular photoreactor. The annular photocatalytic reactor was modelled by a cascade of heightened elementary continuously stirred tank reactors. The influence of several kinetic parameters such as pollutant concentration, incident light irradiance, contact time and humidity content has been studied. The photocatalytic degradation by-products of 1-propanol has been identified in the gas-phase by GC/MS. Propionaldehyde and acetaldehyde were found to be the main gaseous intermediates. Propionaldehyde and acetaldehyde have been taken into account in a "two-site model" to evaluate the possible competition of adsorption between 1-propanol and its by-products of degradation. A mechanistic pathway is then proposed for the photocatalytic degradation of 1-propanol.

Affiliations:

Le document en format XML

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<term>Gas Chromatography-Mass Spectrometry (methods)</term>
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<term>Kinetic parameter</term>
<term>Kinetics</term>
<term>Modeling</term>
<term>Models, Statistical</term>
<term>Oxidation</term>
<term>Photocatalysis</term>
<term>Photochemical degradation</term>
<term>Photochemical reactor</term>
<term>Photochemistry (methods)</term>
<term>Pollutant</term>
<term>Pollutant behavior</term>
<term>Pollution</term>
<term>Reaction product</term>
<term>Time Factors</term>
<term>Volatile organic compound</term>
<term>Waste Disposal, Fluid (methods)</term>
<term>Water content</term>
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<term>Aldéhydes ()</term>
<term>Catalyse</term>
<term>Chromatographie ()</term>
<term>Chromatographie gazeuse-spectrométrie de masse ()</term>
<term>Cinétique</term>
<term>Facteurs temps</term>
<term>Gaz</term>
<term>Modèles statistiques</term>
<term>Photochimie ()</term>
<term>Polluants atmosphériques ()</term>
<term>Polluants atmosphériques (analyse)</term>
<term>Propan-1-ol ()</term>
<term>Techniques de chimie analytique ()</term>
<term>Élimination des déchets liquides ()</term>
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<keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Air Pollutants</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>1-Propanol</term>
<term>Acetaldehyde</term>
<term>Air Pollutants</term>
<term>Aldehydes</term>
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<term>Chromatography</term>
<term>Gas Chromatography-Mass Spectrometry</term>
<term>Photochemistry</term>
<term>Waste Disposal, Fluid</term>
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<keywords scheme="MESH" xml:lang="en"><term>Adsorption</term>
<term>Catalysis</term>
<term>Gases</term>
<term>Kinetics</term>
<term>Models, Statistical</term>
<term>Time Factors</term>
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<term>Chromatographie</term>
<term>Chromatographie gazeuse-spectrométrie de masse</term>
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<term>Facteurs temps</term>
<term>Gaz</term>
<term>Modèles statistiques</term>
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<term>Polluants atmosphériques</term>
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<term>Oxydation</term>
<term>Pollution</term>
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<term>Polluant</term>
<term>Techniques de chimie analytique</term>
<term>Teneur eau</term>
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<term>Modélisation</term>
<term>Adsorption</term>
<term>Devenir polluant</term>
<term>Élimination des déchets liquides</term>
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<front><div type="abstract" xml:lang="en">Photocatalytic oxidation of airborne contaminants appears to be a promising process for remediation of air polluted by Volatile Organic Compounds (VOCs). In the present work, the photocatalytic oxidation of gaseous 1-propanol has been investigated by using an annular photoreactor. The annular photocatalytic reactor was modelled by a cascade of heightened elementary continuously stirred tank reactors. The influence of several kinetic parameters such as pollutant concentration, incident light irradiance, contact time and humidity content has been studied. The photocatalytic degradation by-products of 1-propanol has been identified in the gas-phase by GC/MS. Propionaldehyde and acetaldehyde were found to be the main gaseous intermediates. Propionaldehyde and acetaldehyde have been taken into account in a "two-site model" to evaluate the possible competition of adsorption between 1-propanol and its by-products of degradation. A mechanistic pathway is then proposed for the photocatalytic degradation of 1-propanol.</div>
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Photocatalytic degradation of gaseous 1-propanol using an annular reactor : Kinetic modelling and pathways

Photocatalytic degradation of gaseous 1-propanol using an annular reactor : Kinetic modelling and pathways

Source :

Descripteurs français

English descriptors

Abstract

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