CH4 Dissociation Mechanisms on Aged Three-Way ...
Document type :
Article dans une revue scientifique: Article original
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Title :
CH4 Dissociation Mechanisms on Aged Three-Way Natural Gas Vehicle Pd/Al2O3 Catalyst
Author(s) :
Dhainaut, Fabien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
van Veen, A. C. [Auteur]
University of Warwick [Coventry]
Pietrzyk, S. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Pietrzyk, S. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
van Veen, A. C. [Auteur]
University of Warwick [Coventry]
Pietrzyk, S. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Pietrzyk, S. [Auteur]
Journal title :
Topics in Catalysis
Volume number :
60
Pages :
295-299
Publication date :
2016
ISSN :
1022-5528
English keyword(s) :
TAP measurements
methane activation
palladium
NGV catalysts
methane activation
palladium
NGV catalysts
HAL domain(s) :
Chimie/Catalyse
English abstract : [en]
This paper deals with the kinetics of CH4 dissociation on a model Pd/Al2O3 catalyst. The adsorption and conversion of CH4 over reduced or oxidized catalysts were studied by applying a temporal analysis of products (TAP) ...
Show more >This paper deals with the kinetics of CH4 dissociation on a model Pd/Al2O3 catalyst. The adsorption and conversion of CH4 over reduced or oxidized catalysts were studied by applying a temporal analysis of products (TAP) reactor. The experiments are discussed in the light of a selected mechanism involving CH4 decomposition into carbon and hydrogen that cannot be simplified to a global reaction because of the importance of CH2 ad-species. This mechanism was modified for oxidized catalysts including steps for the formation of water involving the recombination of two neighbor OHads species. TAP experiments over the oxidized catalyst confirm the involvement of the metal/support interface, with a spill-over effect previously characterized on the reduced catalyst. Optimized kinetics parameters were compared to theoretical values showing a relatively good agreement.Show less >
Show more >This paper deals with the kinetics of CH4 dissociation on a model Pd/Al2O3 catalyst. The adsorption and conversion of CH4 over reduced or oxidized catalysts were studied by applying a temporal analysis of products (TAP) reactor. The experiments are discussed in the light of a selected mechanism involving CH4 decomposition into carbon and hydrogen that cannot be simplified to a global reaction because of the importance of CH2 ad-species. This mechanism was modified for oxidized catalysts including steps for the formation of water involving the recombination of two neighbor OHads species. TAP experiments over the oxidized catalyst confirm the involvement of the metal/support interface, with a spill-over effect previously characterized on the reduced catalyst. Optimized kinetics parameters were compared to theoretical values showing a relatively good agreement.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Research team(s) :
Remédiation et matériaux catalytiques (REMCAT)
Submission date :
2019-09-25T14:06:35Z
2024-01-12T11:10:19Z
2024-01-31T14:21:13Z
2024-01-12T11:10:19Z
2024-01-31T14:21:13Z
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