Hydrogenation of crotonaldehyde on different Au/CeO2 catalysts
The gas-phase hydrogenation of crotonaldehyde was carried out at 120, 150, and 180 °C over Au catalysts supported on ceria with low and medium surface areas (150 and 80 m2 g-1, respectively). An initial deactivation period was observed, followed by a steady-state regime. Ethanol was the main product...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/62300 |
| Acceso en línea: | http://hdl.handle.net/11336/62300 |
| Access Level: | acceso abierto |
| Palabra clave: | Ceria Crotonaldehyde Hydrogenation Gold Selective Hydrogenation https://purl.org/becyt/ford/2.4 https://purl.org/becyt/ford/2 |
| Sumario: | The gas-phase hydrogenation of crotonaldehyde was carried out at 120, 150, and 180 °C over Au catalysts supported on ceria with low and medium surface areas (150 and 80 m2 g-1, respectively). An initial deactivation period was observed, followed by a steady-state regime. Ethanol was the main product in the deactivation period, whereas crotyl alcohol, butanal, butanol, and condensation products were produced under steady-state conditions. The activity and selectivity to crotyl alcohol (in the 20-32% range) were lower than those for the high-surface area ceria catalysts studied previously [B. Campo, M. Volpe, S. Ivanova, R. Touroude, J. Catal. 242 (2006) 162]. Samples were characterized by TPR, XPS, TEM, and XRD. The analysis of catalytic and characterization results indicates that gold particles supported on low- and medium-surface area ceria were relatively large, and the promotional effect of Ce3+ species was not achieved for the corresponding catalysts. Moreover, under reductive conditions, sintering still increased gold particle size. © 2007 Elsevier Inc. All rights reserved. |
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