期刊
CATALYSIS COMMUNICATIONS
卷 10, 期 2, 页码 261-265出版社
ELSEVIER
DOI: 10.1016/j.catcom.2008.09.002
关键词
Liquid-phase dehydration; 1-Phenylethanol; Styrene; Mordenites
资金
- Universidad Nacional del Litoral (UNL)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT), Argentina
The liquid-phase dehydration of 1-phenylethanol over mordenite-like zeolites, with different Si/Al ratios, was studied at 363 K using cyclohexane as solvent. It was determined that catalyst activity and selectivity greatly depended on the Si/Al ratio. The non-dealuminated mordenite showed the lowest activity, dehydrating 1-phenylethanol mainly to alpha-methylbenzyl ether via an intermolecular mechanism. Instead, intramolecular dehydration of 1-phenylethanol into styrene was mainly observed over dealuminated samples. Changes in catalytic performance with Si/Al ratio was explained on the basis of: (1) acid site density; (2) relative amount of strong acid sites respect to weak ones; (3) accessibility to strong acid sites. (C) 2008 Elsevier B.V. All rights reserved.
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