Ru-M (M = Fe or Co) Catalysts with high Ru surface concentration for Fischer-Tropsch synthesis
[EN] Ru-Co/AlO and Ru-Fe/AlO have been prepared by the reduction-deposition method. This approach favours the interaction between Ru and Fe or Co in the final catalysts, while increasing surface enrichment of Ru. Their performance for the Fischer-Tropsch Synthesis (FTS) has been evaluated in a fixed...
| Autores: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/259930 |
| Acceso en línea: | http://hdl.handle.net/10261/259930 |
| Access Level: | acceso abierto |
| Palabra clave: | Ruthenium Fischer-Tropsch Cobalt Iron Bimetallic |
| Sumario: | [EN] Ru-Co/AlO and Ru-Fe/AlO have been prepared by the reduction-deposition method. This approach favours the interaction between Ru and Fe or Co in the final catalysts, while increasing surface enrichment of Ru. Their performance for the Fischer-Tropsch Synthesis (FTS) has been evaluated in a fixed bed reactor. Ru-Co/AlO displays the highest activity in the series, doubling the steady-state CO conversion rate of a Ru/AlO catalyst with 3 times higher Ru loading. Ru-Fe/AlO displays higher initial CO conversion and -CH- productivity than Ru/AlO, but its activity declines during operation reaching lower conversion rates than Ru/AlO. In addition to CO, Ru-Fe/AlO produces oxygenated products, mainly alcohols. To a lesser extent, the formation of oxygenates over Ru-Co/AlO and Ru/AlO is also observed, and ascribed to the small crystallite size of the Ru particles. The evolution of CO during time on stream indicates that Fe is segregated to the surface of this catalyst during the FTS. |
|---|