1. Combined theoretical and experimental kinetic approach for methane conversion on model supported Pd/La0.7MnO3 NGV catalyst: Sensitivity to inlet gas composition and consequence on the Pd-support interface
- Author
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Yuanshuang Zheng, Amaury Decoster, Andrea Osti, Antonella Glisenti, Jean-Philippe Dacquin, Fabien Dhainaut, Svetlana Heyte, Pascal Granger, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Scienze Chimiche [Padova], Università degli Studi di Padova = University of Padua (Unipd), Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), ANR-18-CE07-0040,SMARTCAT,Catalyseurs de post-traitement intelligent adaptés à l'usage de carburants alternatifs(2018), and ANR-11-EQPX-0037,REALCAT,Plateforme intégREe AppLiquée au criblage haut débit de CATalyseurs pour les bioraffineries(2011)
- Subjects
Kinetics ,Methane combustion ,NGV three-way catalyst ,Palladium ,Perovskite ,Process Chemistry and Technology ,[CHIM.CATA]Chemical Sciences/Catalysis ,Catalysis - Abstract
International audience; New insights into reaction mechanism for catalytic methane combustion are provided in broad operating conditions on Pd/La0.7MnO3 as model natural gas vehicle catalyst. Under lean and dry conditions, a dual mechanism is suggested with active sites combining reactive oxygen species from La0.7MnO3 and palladium instead of single site reaction mechanism. Aging in wet atmosphere has no consequence on the kinetic behavior. On the other hand, in wet atmosphere near the stoichiometry, strong accumulation of hydroxyl groups on the support would suppress the metal-support interface. Accordingly, methane combustion would take place only on Pd particles.
- Published
- 2022