期刊
CATALYSIS COMMUNICATIONS
卷 15, 期 1, 页码 46-51出版社
ELSEVIER
DOI: 10.1016/j.catcom.2011.07.027
关键词
Mesoporous mixed oxides; Self-assembly hydrothermal synthesis; Epoxidation of cyclooctene
资金
- University of Louisville (UofL) [20037]
We demonstrate the epoxidation of cyclooctene to epoxycyclooctane over mesoporous Ga and mixed Ga-Nb and Ga-Mo oxides synthesized via self-assembly hydrothermal-assisted approach. These mesoporous catalysts displayed high epoxide selectivities at moderate cyclooctene conversions. Mesoporous Ga oxides with average particle sizes between 2 and 3 pm exhibited higher cyclooctene conversions, while larger particle sizes between similar to 4.5-6.5 mu m showed lower conversions. The incorporation of Nb led to an increase in the acidity of the resultant Ga-Nb mixed oxides. These mesoporous Ga-Nb mixed oxides displayed 80-100% selectivity for the epoxide at conversion levels of cyclooctene in the 17 to 30% range. Finally, a mesoporous Ga-Mo oxide with molar composition of 35% Mo displayed the highest cyclooctene conversion of all mesoporous samples at 60 degrees C. The conversion of this sample was 41% with 100% selectivity. Published by Elsevier B.V.
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