期刊
CATALYSIS COMMUNICATIONS
卷 19, 期 -, 页码 105-109出版社
ELSEVIER
DOI: 10.1016/j.catcom.2011.12.029
关键词
Glycerol; Dehydration; Acrolein; SBA-15; Sustainable chemistry
资金
- Portuguese Fundacao para a Ciencia e Tecnologia (FCT) [REEQ/700/CTM/2005]
Sulfonic-functionalized mesoporous silicas (SBA-15) were used as catalysts in the gas-phase dehydration of glycerol at moderate temperature (275 and 300 degrees C). For the tested conditions all the samples show a very high catalytic activity. At the lowest temperature and for 140 h on stream a nearly constant selectivity to acrolein of ca. 80% could be obtained. Both the pore size and density of acid sites play an important role in the deactivation rate and selectivity: larger pore size may extend significantly the catalytic activity and high density of acid sites may reduce acrolein production. Increasing the temperature to 300 degrees C is beneficial to the acrolein production, but it also leads to an increase of the deactivation rate. (C) 2011 Elsevier B.V. All rights reserved.
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