Selective hydrogenation of dimethyl maleate to tetrahydrofuran over Cu/SiO_2 catalyst:Effect of Cu^+ on the catalytic performance  

作　　者：Xue-Qing Han Qun-Feng Zhang Feng Feng Chun-Shan Lu Lei Ma Xiao-Nian Li 

机构地区：[1]Institute of Industrial Catalysis ofZhejiang University of Technology,State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology

出　　处：《Chinese Chemical Letters》2015年第9期1150-1154,共5页中国化学快报（英文版）

基　　金：Funding for the present study from the National Key Basic Research Program of China(973 Program,No.2011CB710800);National Natural Science Foundation of China(No.NSFC21406199)

摘　　要：Cu/SiO2 catalysts prepared by different methods 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 Cu^0species in the activated AE-Cu/SiO2.while only Cu° species existing in the activated Wl-Cu/SiO2.Researches suggest that Cu^＋ can adsorb and polarize the C=0 bond of DMM.It is concluded that Cu°could be the main active site and the synergistic effect between Cu^0 and Cu^＋ could contribute to hydrogenation of DMM to THF.Cu/SiO2 catalysts prepared by different methods 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 Cu^0species in the activated AE-Cu/SiO2.while only Cu° species existing in the activated Wl-Cu/SiO2.Researches suggest that Cu^＋ can adsorb and polarize the C=0 bond of DMM.It is concluded that Cu°could be the main active site and the synergistic effect between Cu^0 and Cu^＋ could contribute to hydrogenation of DMM to THF.

关 键 词：Dimethyl maleate Tetrahydrofuran Copper phyllosilicate Silica-supported copper Copper valence state 

分 类 号：O643.36[理学—物理化学]