CO2-oxidative Dehydrogenation of Light Alkanes Catalyzed by Cr Catalysts Supported on Different Mesoporous Silica Structures
Herein, a series of highly porous and well-structured mesoporous materials are presented as supports for chromium catalysts for the mild oxidative dehydrogenation of propane using CO2 as the oxidizing agent. The materials MCM-41, SBA-1, and SBA-15 were proposed as supports for the preparation of Cr-...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::cf98e499931983808487abf5f16c4bdc |
| Acceso en línea: | http://hdl.handle.net/10261/429712 https://www.scopus.com/pages/publications/85217169423?origin=resultslist |
| Access Level: | acceso abierto |
| Palabra clave: | CO<sub>2</sub> utilization Cr-catalyst Mesostructural materials Mild oxidative dehydrogenation Propane dehydrogenation Propylene |
| Sumario: | Herein, a series of highly porous and well-structured mesoporous materials are presented as supports for chromium catalysts for the mild oxidative dehydrogenation of propane using CO2 as the oxidizing agent. The materials MCM-41, SBA-1, and SBA-15 were proposed as supports for the preparation of Cr-based catalysts with a Cr content of 6 wt%. These results highlight that mesostructured supports influence chromium species’ dispersion and electronic state in the catalysts. Among the catalysts tested, the Cr/SBA-1 catalyst demonstrated superior propane conversion and propylene selectivity. The results suggest that the Cr6+ species fraction significantly influences the conversion and selectivity during oxidative dehydrogenation of propane by CO2. As the Cr6+ species fraction increases, a linear increase in conversion was observed for both propane and CO2. Furthermore, an increase in the Cr6+ species fraction leads to an increased selectivity towards propylene formation while it reduces the selectivity for CO and cracking products. This indicates that Cr6+ species favor olefin formation over undesired by-products. © The Author(s) 2025. |
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