| Autor: |
Athirah Ayub, Hasliza Bahruji, Abdul Hanif Mahadi, Amira Afra Adam |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Sustainable Chemistry for Climate Action, Vol 3, Iss , Pp 100032- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2772-8269 |
| DOI: |
10.1016/j.scca.2023.100032 |
| Popis: |
A low temperature CO2 methanation is a thermodynamically favorable route to produce highly selective methane while preventing catalyst deactivation. Ni-Ba/Sm2O3 catalysts synthesized using one-pot hydrothermal method exhibited enhanced reducibility with high CO2 adsorption capacity to achieve CO2 conversion at low temperatures. CO2 conversion occurred at 200 °C with 5% conversion, progressively increasing to reach equilibrium at 400 °C with 100% selectivity to methane. BaO promotes surface oxygen vacancy in Sm2O3, which is responsible for forming bidentate formate species during CO2 methanation. Comparative DRIFTS analysis with Ni-Ba/Sm2O3 synthesized using impregnation indicates the catalysts followed different mechanistic pathways depending on the amount of surface oxygen vacancy generated by BaO/Sm2O3 proximity. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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