Remarkably stable and efficient Ni and Ni-Co catalysts for CO2 methanation
| Autor: | Alain Ledoux, Federico Azzolina-Jury, Bachar Alrafei, Isabelle Polaert |
|---|---|
| Přispěvatelé: | Laboratoire de Sécurité des Procédés Chimiques (LSPC), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA), Laboratoire catalyse et spectrochimie (LCS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), Normandie Université (NU) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element Sintering 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Catalysis Ni-Co catalyst [CHIM.GENI]Chemical Sciences/Chemical engineering Methanation Packed bed General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Nickel CO2 valorisation chemistry Chemical engineering Yield (chemistry) Green process 0210 nano-technology Dispersion (chemistry) Selectivity Power-to-gas |
| Zdroj: | Catalysis Today Catalysis Today, Elsevier, 2020, 346, pp.23-33. ⟨10.1016/j.cattod.2019.03.026⟩ |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2019.03.026⟩ |
| Popis: | International audience; CO2 methanation is one of the most promising ways to store energy based on the power-togas concept. In this study, efficient nickel (Ni) and nickel-cobalt (Ni-Co), supported on alumina catalysts with different amounts of Ni and Co were prepared, characterized and used for CO2 methanation under the atmospheric pressure. The catalysts were prepared in the form of extrudates for catalytic tests. The effect of Ni content and the influence of Co on Ni catalysts were studied in a packed bed methanation reactor at laboratory scale. An optimal Ni-Co content was identified based on CO2 and H2 conversion and CH4 selectivity and yield. The addition of Co improved the reducibility of Ni species and Ni particles' dispersion over the support. Therefore, the presence of Co enhanced the catalyst activity and selectivity towards CH4. Moreover, it was observed that low reaction temperatures (lower than 350 °C) can be used when lowering the Ni content (i.e. 10% wt.). This major fact is favourable to the reduction of the overall process energy consumption and to the decrease of the catalysts' deactivation at high temperature (>400 °C), such as the active phase sintering. Finally, the Ni and Ni-Co catalysts prepared in this work for CO2 methanation presented a remarkably high stability over 200 h of continuous reaction. |
| Databáze: | OpenAIRE |
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