Enhanced catalytic performance for SiO2–TiO2 binary oxide supported Cu-based catalyst in the hydrogenation of dimethyloxalate

Authors: Chao Wen, Anyuan Yin, Yuanyuan Cui, Xinli Yang, Wei-Lin Dai, Kangnian Fan

Abstract:
Copper based catalyst with Si–Ti binary-oxide support is synthesized via a facile ammonia evaporation method for selective hydrogenation of dimethyloxalate (DMO) to ethylene glycol (EG). 100% conversion of DMO and 90% selectivity to EG could be obtained over the Cu/SiO₂–TiO₂ catalyst at high liquid hourly space velocity (LHSV).Catalytic stability is greatly enhanced whenthe Si–Ti binary oxide isusedas support because of the intimate interaction between copper species and the support. The improved catalytic performance compared to the unitary oxide-supported catalysts SiO₂ and TiO₂ could be attributed to the highly dispersed copper species stabilized by the binary support. Also, the electron transfer from TiO₂ to Cu-species is found to play an important role in improving the surface charge density of the metallic copper, which is helpful to improve the catalytic activity.

Keywords:
Binary-oxide support
Dimethyloxalate hydrogenation
Ethylene glycol
Cu/SiO₂–TiO₂

Published in: Applied catalysis A: General  (Volume 458, Pages 1-206, 10 May 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Enhanced catalytic performance for SiO2–TiO2 binary oxide supported Cu-based catalyst in the hydrogenation of dimethyloxalate

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