Role of acidity in hydrogenation of cinnamaldehyde on platinum beta zeolite
| Autor: | Heidi Österholm, Marja Tiitta, Ville-Veikko Nieminen, Tapani Venäläinen, M. Lashdaf, Outi Krause |
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| Rok vydání: | 2004 |
| Předmět: |
endocrine system diseases
Cinnamyl alcohol Chemistry Acetal chemistry.chemical_element General Chemistry Condensed Matter Physics Heterogeneous catalysis Cinnamaldehyde Catalysis chemistry.chemical_compound Mechanics of Materials Organic chemistry General Materials Science Selectivity Platinum Zeolite Nuclear chemistry |
| Zdroj: | Microporous and Mesoporous Materials. 75:149-158 |
| ISSN: | 1387-1811 |
| DOI: | 10.1016/j.micromeso.2004.05.008 |
| Popis: | A series of platinum beta zeolites with different well-defined acid properties were tested in cinnamaldehyde hydrogenation. The acetal formation was found to be related to the amount of acid sites on the external surface of the zeolite. The acidity of the beta zeolite influenced the platinum dispersion, and the activity of the catalysts increased with total acidity of the beta zeolite. In general, platinum activates the CO group of cinnamaldehyde. Because of the acidity of the support, however, only hydrocinnamaldehyde and acetals were formed with catalysts with 0.5 wt% platinum loading. The highest selectivity to cinnamyl alcohol (27%) was obtained with the 5 wt% platinum catalyst, as a result of the isomerisation of hydrocinnamaldehyde. |
| Databáze: | OpenAIRE |
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