文献类型：期刊文献

英文题名：Effect of copper loading on texture, structure and catalytic performance of Cu/SiO₂ catalyst for hydrogenation of dimethyl oxalate to ethylene glycol

作者：Zhang, Bo[1];Hui, Shengguo[1];Zhang, Suhua[1];Ji, Yang[2];Li, Wei[1];Fang, Dingye[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Pujing Chem Ind Sha Ltd, Shanghai 200231, Peoples R China

年份：2012

卷号：21

期号：5

起止页码：563

外文期刊名：JOURNAL OF NATURAL GAS CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000310415000012)】；

语种：英文

外文关键词：Cu/SiO2; copper loading; dimethyl oxalate; ethylene glycol; copper phyllosilicate

摘要：Cu/SiO2 catalysts prepared by a convenient and efficient method using the urea hydrolysis deposition-precipitation (UHDP) technique have been proposed focusing on the effect of copper loading. The texture, structure and composition are systematically characterized by ICP, FT-IR, N-2-physisorption, N2O chemisorption, TPR, XRD and XPS. The formation of copper phyllosilicate is observed in Cu/SiO2 catalyst by adopting UHDP method, and the amount of copper phyllosilicate is related to copper loading. It is found the structure properties and catalytic performance is profoundly affected by the amount of copper phyllosilicate. The excellent catalytic activity is attributed to the synergetic effect between Cu-0 and Cu+. DMO conversion and EG selectivity are determined by the amount of Cu-0 and Cu+, respectively. The proper copper loading (30 wt%) provides with the highest ratio of Cu+/Cu-0, giving rise to the highest EG yield of 95% under the reaction conditions of p = 2.0 MPa, T = 473 K, H-2/DMO = 80 and LHSV = 1.0 h(-1).