Photocatalytic degradation of gaseous 1-propanol using an annular reactor: kinetic modelling and pathways.
Identifieur interne : 000135 ( Ncbi/Curation ); précédent : 000134; suivant : 000136Photocatalytic degradation of gaseous 1-propanol using an annular reactor: kinetic modelling and pathways.
Auteurs : G. Vincent [France] ; P M Marquaire ; O. ZahraaSource :
- Journal of hazardous materials [ 0304-3894 ] ; 2009.
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.
- Acétaldéhyde, Adsorption, Aldéhydes, Catalyse, Chromatographie, Chromatographie gazeuse-spectrométrie de masse, Cinétique, Facteurs temps, Gaz, Modèles statistiques, Photochimie, Polluants atmosphériques, Propan-1-ol, Techniques de chimie analytique, Élimination des déchets liquides.
English descriptors
- KwdEn :
- 1-Propanol (chemistry), Acetaldehyde (chemistry), Adsorption, Air Pollutants (analysis), Air Pollutants (chemistry), Aldehydes (chemistry), Catalysis, Chemistry Techniques, Analytical (methods), Chromatography (methods), Gas Chromatography-Mass Spectrometry (methods), Gases, Kinetics, Models, Statistical, Photochemistry (methods), Time Factors, Waste Disposal, Fluid (methods).
- 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.
DOI: 10.1016/j.jhazmat.2008.04.069
PubMed: 18571844
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Vincent</name><affiliation wicri:level="4"><nlm:affiliation>Département de Chimie Physique des Réactions, UMR 7630 CNRS, Nancy-Université, ENSIC, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Département de Chimie Physique des Réactions, UMR 7630 CNRS, Nancy-Université, ENSIC, 1 rue Grandville, BP 20451, 54001 Nancy Cedex</wicri:regionArea><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region><settlement type="city">Nancy</settlement></placeName><orgName type="university">Nancy-Université</orgName></affiliation></author><author><name sortKey="Marquaire, P M" sort="Marquaire, P M" uniqKey="Marquaire P" first="P M" last="Marquaire">P M Marquaire</name></author><author><name sortKey="Zahraa, O" sort="Zahraa, O" uniqKey="Zahraa O" first="O" last="Zahraa">O. 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Vincent</name><affiliation wicri:level="4"><nlm:affiliation>Département de Chimie Physique des Réactions, UMR 7630 CNRS, Nancy-Université, ENSIC, 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Département de Chimie Physique des Réactions, UMR 7630 CNRS, Nancy-Université, ENSIC, 1 rue Grandville, BP 20451, 54001 Nancy Cedex</wicri:regionArea><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region><settlement type="city">Nancy</settlement></placeName><orgName type="university">Nancy-Université</orgName></affiliation></author><author><name sortKey="Marquaire, P M" sort="Marquaire, P M" uniqKey="Marquaire P" first="P M" last="Marquaire">P M Marquaire</name></author><author><name sortKey="Zahraa, O" sort="Zahraa, O" uniqKey="Zahraa O" first="O" last="Zahraa">O. 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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></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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