Transient Isotopic Studies and Microkinetic Modeling of CO Methanation over Nickel Catalysts
| Autor: | Davide Lorito, Pascal Fongarland, Yves Schuurman |
|---|---|
| Přispěvatelé: | IRCELYON-Catalyse Hétérogène pour la Transition Energétique (CATREN), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-C'Durable (CDURABLE), IRCELYON-Ingéniérie, du matériau au réacteur (ING) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Chemistry
General Chemical Engineering Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology [SDE.ES]Environmental Sciences/Environmental and Society Industrial and Manufacturing Engineering Dissociation (chemistry) Methane Catalysis Nickel chemistry.chemical_compound 020401 chemical engineering Methanation Transient (oscillation) 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Industrial and engineering chemistry research Industrial and engineering chemistry research, American Chemical Society, 2021, 60 (18), pp.6698-6705. ⟨10.1021/acs.iecr.0c05885⟩ |
| ISSN: | 0888-5885 1520-5045 |
| DOI: | 10.1021/acs.iecr.0c05885⟩ |
| Popis: | International audience; The methanation of CO over a 20 wt % Ni/Al2O3 catalyst was studied with different transient experiments. CO dissociation was found to be reversible and faster than the formation of methane. SSITKA experiments showed that two pools of surface intermediates lead to the formation of methane. The transient experiments could be adequately described by a microkinetic model based on two distinct adsorbed CO species. One CO species proceeds through direct dissociation, and the other, through hydrogen assisted dissociation to a common CH* intermediate that leads to methane. The model is consistent with literature DFT studies that show that the direct CO dissociation occurs over edge or step sites and hydrogen assisted dissociation occurs over terrace sites. |
| Databáze: | OpenAIRE |
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