1-Octanol selective oxidation over supported gold catalysts: influence of the support nature, metal load and reaction conditions
| Autor: | Cortés Corberán, Vicente, Gómez Avilés, Almudena, Martínez-González, Susana, Ivanova, Svetlana, Domínguez, M. I., Fernández-Lafuente, Roberto |
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| Rok vydání: | 2013 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Trabajo presentado en el 7th World Congress On Oxidation Catalysis, celebrado en Saint Louis (Estados Unidos) del 9 al 12 de junio de 2013. Selective oxidation of long-chain aliphatic alcohols has received much less attention than that of other more reactive (short chain aliphatic or benzylic) alcohols. The liquid-phase direct oxidation of 1-octanol over gold supported catalysts has been investigated in a semicontinuous reactor at 40-80 ºC, using O2 as oxidant and base-free n-heptane as solvent. The nature of the supports explored (CeO2-Al2O3, TiO2, Fe2O3 and CeO2) influenced both activity and product distribution. The most active catalysts were those supported on CeO2-Al2O3, which showed remarkably high octanal selectivity (Sald). The best performance was found with 0.7 wt.% Au: higher metal loads decreased activity. With this catalyst the influence of reaction conditions (temperature, substrate/catalyst ratio R, oxygen flow, reaction time) was studied. The highest conversion after 6h (62%, Sald=50-60 %.) was obtained at 80ºC with R=100. Tests with bare support added to catalyst in reactor evidenced the role of the support surface in product distribution. |
| Databáze: | OpenAIRE |
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