Liquid phase trans-stilbene epoxidation over catalytically active cobalt substituted TUD-1 mesoporous materials (Co-TUD-1) using molecular oxygen

Autor:	Yanhui Yang, Shuangquan Hu, XY Xian-Yang Quek, Qinghu Tang
Rok vydání:	2009
Předmět:	chemistry.chemical_classification Alkene Process Chemistry and Technology Epoxide chemistry.chemical_element Heterogeneous catalysis Catalysis chemistry.chemical_compound chemistry MCM-41 Polymer chemistry Organic chemistry Mesoporous material Selectivity Cobalt
Zdroj:	Applied Catalysis A: General. 361:130-136
ISSN:	0926-860X
DOI:	10.1016/j.apcata.2009.04.003
Popis:	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 Co 2+ -NaX. Microwave irradiation can significantly shorten the reaction time, whereas high conversion and epoxide selectivity remained.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::15a5b391d4f7f88b307ffa6e0a6fec49 https://doi.org/10.1016/j.apcata.2009.04.003 Zobrazit plný text záznamu Full Text from ScienceDirect