Selective CO methanation with structured RuO2/Al2O3 catalysts
| Autor: | A. Muñoz-Murillo, L.M. Martínez T., M.I. Domínguez, J.A. Odriozola, M.A. Centeno |
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| Přispěvatelé: | Universidad de Sevilla. Departamento de Química Inorgánica, Ministerio de Economía y Competitividad (MINECO). España, European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER), Junta de Andalucía |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Materials science
02 engineering and technology Thermal treatment 010402 general chemistry 01 natural sciences Catalysis Catalytic reforming Methanation Metallic micromonolith CO and CO2 methanation RuO2/Al2O3 Fecralloy micromonolith General Environmental Science RuO2/Al2O3 catalysts Washcoating Aqueous solution Process Chemistry and Technology PROX CO methanation 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering CO2 methanation Slurry Particle size 0210 nano-technology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Active and selective structured RuO/AlO catalysts for CO methanation using a flow simulating CO-rich reformate gases from WGS and PROX units (H excess, CO presence and 300 ppm CO concentration) were prepared. Both, the RuO/AlO powder and the slurry prepared from it for its structuration by washcoating of the metallic micromonolithic structure, were also active and selective. Both the slurry (S-RuAl) and micromonoliths (M-RuAl) were able to completely and selectively methanate CO at much lower temperatures than the parent RuAl powder. The optimal working temperature in which the CO conversion is maximum and the CO conversion is minimized was determined to be from 149 °C to 239 °C for S-RuAl and from 165 °C to 232 °C for M-RuAl, whilst it was from 217 °C to 226 °C for RuAl powder. TPR, XRD and TEM measurements confirmed that the changes in the activity and selectivity for CO methanation among the considered catalysts can be related with modifications in the surface particle size of ruthenium and its reducibility. These were ascribed to the metallic substrate, the presence of PVA and colloidal alumina in the slurry preparation, the aqueous and acidic media and the thermal treatment used, resulting in a more active and selective catalysts than the parent powder. |
| Databáze: | OpenAIRE |
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