Cu-MCM-41催化剂的制备及在草酸酯加氢制乙二醇催化性能

采用蒸氨沉淀法制备了Cu-MCM-41分子筛催化剂，并采用BET、TEM、XRD和TPR等表征手段对该催化剂进行了表征。表征结果说明所研制催化剂具有规整有序的介孔结构并且活性组分铜得到了良好的分散。通过对该催化剂在草酸二甲酯（DMO）加氢制乙二醇反应中反应性能的研究发现，反应温度、反应压力、氢酯比和液时空速等工艺参数均对催化活性产生重要影响。结果表明，Cu-MCM-41催化剂在反应温度473 K，反应压力2.5 MPa，n(氢)∶n(酯)为80～100时表现出最佳的加氢反应性能，液时空速在2.0 h^-1时，DMO仍然可以完全转化并且乙二醇（EG）选择性达到98%以上。

Preparation of Cu-MCM-41 Catalyst and Catalytic Performance for Hydrogenation of Dimethyl Oxalate to Ethylene Glycol

Mesoporous Cu-MCM-41 catalyst was successfully synthesized and its textural and reduction properties were characterized by BET, TEM, XRD and TPR. The results indicated that the catalyst had regular mesoporous structure and copper was highly dispersed on MCM-41 supporter. Gaseous hydrogenation of DMO reaction was carried out to investigate the catalytic performance of Cu-MCM-41 catalyst. The tests of reaction parameters indicated that reaction temperature, pressure, H2/DMO ratio and liquid hourly space velocity （LHSV） all have much effect on the catalytic performance. The optimum reaction con- ditions were： reaction temperature 473 K, pressure 2.5 MPa, H2/DMO ratio 80--100. Under these conditions, DMO could be fully converted and the selectivity of EG was over 98% at LHSV as 2.0 h-1