Thermal aging of perovskite based natural ...
Type de document :
Article dans une revue scientifique: Article original
URL permanente :
Titre :
Thermal aging of perovskite based natural gas vehicle catalysts: dependency of the mode of pd incorporation
Auteur(s) :
Granger, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Reneme, Y. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lahougue, A. [Auteur]
Institut de Recherche sur les Matériaux Avancés [IRMA]
Hamon, C. [Auteur]
Institut de Recherche sur les Matériaux Avancés [IRMA]
Dhainaut, Fabien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Reneme, Y. [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Lahougue, A. [Auteur]
Institut de Recherche sur les Matériaux Avancés [IRMA]
Hamon, C. [Auteur]
Institut de Recherche sur les Matériaux Avancés [IRMA]
Dhainaut, Fabien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Titre de la revue :
Topics in Catalysis
Nom court de la revue :
Top. Catal.
Date de publication :
2020-07-14
ISSN :
1022-5528
Mot(s)-clé(s) en anglais :
NGV catalyst
Methane conversion
NO(x)removal
Perovskite
Palladium
Methane conversion
NO(x)removal
Perovskite
Palladium
Discipline(s) HAL :
Chimie/Catalyse
Résumé en anglais : [en]
Catalytic performance of fresh and aged impregnated Pd/LaFeO3 and sol gel LaFe1−xPdxO3 Natural Gas Vehicle Three-Way Catalysts, in powder form and wash-coated on ceramic monolith, have been investigated. Aging at 980 °C ...
Lire la suite >Catalytic performance of fresh and aged impregnated Pd/LaFeO3 and sol gel LaFe1−xPdxO3 Natural Gas Vehicle Three-Way Catalysts, in powder form and wash-coated on ceramic monolith, have been investigated. Aging at 980 °C in wet atmosphere has no detrimental effect on the structural properties with the preservation of the orthorhombic structure of the perovskite. On the other hand, a loss of specific surface area is accompanied with surface Pd enrichment on LaFe1−xPdxO3 through ex solution process. It was found that the mode of Pd incorporation and subsequent aging has a limited impact on the catalytic performance at low temperature for the NO/H2 reaction. On the other hand, sharp rate enhancement in NO and methane conversion occurs at high temperature related to change in the reaction pathway from methane combustion to reforming reactions producing more efficient reducing agents to reduce NO. Such behaviour has been explained by the coexistence of palladium stabilized at different oxidation state at the surface and inside the perovskite structure.Lire moins >
Lire la suite >Catalytic performance of fresh and aged impregnated Pd/LaFeO3 and sol gel LaFe1−xPdxO3 Natural Gas Vehicle Three-Way Catalysts, in powder form and wash-coated on ceramic monolith, have been investigated. Aging at 980 °C in wet atmosphere has no detrimental effect on the structural properties with the preservation of the orthorhombic structure of the perovskite. On the other hand, a loss of specific surface area is accompanied with surface Pd enrichment on LaFe1−xPdxO3 through ex solution process. It was found that the mode of Pd incorporation and subsequent aging has a limited impact on the catalytic performance at low temperature for the NO/H2 reaction. On the other hand, sharp rate enhancement in NO and methane conversion occurs at high temperature related to change in the reaction pathway from methane combustion to reforming reactions producing more efficient reducing agents to reduce NO. Such behaviour has been explained by the coexistence of palladium stabilized at different oxidation state at the surface and inside the perovskite structure.Lire moins >
Langue :
Anglais
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Équipe(s) de recherche :
Remédiation et matériaux catalytiques (REMCAT)
Date de dépôt :
2022-03-02T07:14:49Z
2024-02-05T16:30:10Z
2024-02-05T16:30:10Z