Journal
APPLIED CATALYSIS A-GENERAL
Volume 361, Issue 1-2, Pages 130-136Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2009.04.003
Keywords
Co-TUD-1; trans-Stilbene; Epoxidation; Molecular oxygen; Microwave
Categories
Funding
- AcRF tier 1 [RG45/06]
- AcRF tier 2 [ARC 13/07]
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A series of framework substituted Co-TUD-1 catalysts, prepared by direct hydrothermal synthesis, were characterized using X-ray diffraction, nitrogen physisorption, transmission electron microscopy and UV-vis and Raman spectroscopies. These catalysts showed high conversion and selectivity towards trans-stilbene oxide in liquid phase trans-stilbene epoxidation with molecular oxygen as oxidant in the absence of a sacrificial reductant. The conversion and selectivity did not remarkably differentiate for fresh and recycled catalyst after four reaction runs. The unique pore structure of Co-TUD-1 catalyst is suggested to be beneficial for the epoxidation of bulky alkene molecules comparing with other well-established catalysts, e.g., Co-MCM-41 and Co2+-NaX. Microwave irradiation can significantly shorten the reaction time, whereas high conversion and epoxide selectivity remained. (C) 2009 Elsevier B.V. All rights reserved.
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