Selective hydrogenation of dimethyl maleate to tetrahydrofuran over Cu/SiO2 catalyst: Effect of Cu+ on the catalytic performance |
| |
Authors: | Xue-Qing Han Qun-Feng Zhang Feng Feng Chun-Shan Lu Lei Ma Xiao-Nian Li |
| |
Affiliation: | Institute of Industrial Catalysis of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310032, China |
| |
Abstract: | Cu/SiO2 catalysts prepared by differentmethods have been investigated focusing on the influence of Cu+ on the catalytic performance. The composition, structure and copper valence state were characterized by means of BET, XRD, XPS, FTIR, N2O-titration. It was found that the Cu/SiO2 prepared by ammoniaevaporation (AE) method had much higher TOF value than that prepared by wetness-impregnation (WI) with the same THF selectivity. The higher TOF value was attributed to the coexistence of Cu+ and Cu0 species in the activated AE-Cu/SiO2, while only Cu0 species existing in the activated WI-Cu/SiO2. Researches suggest that Cu+ can adsorb and polarize the C=O bond of DMM. It is concluded that Cu0 could be the main active site and the synergistic effect between Cu0 and Cu+ could contribute to hydrogenation of DMM to THF. |
| |
Keywords: | Dimethyl maleate Tetrahydrofuran Copper phyllosilicate Silica-supported copper Copper valence state |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《中国化学快报》浏览原始摘要信息 |
|
点击此处可从《中国化学快报》下载全文 |
|