Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/SiO2 Catalysts Prepared by Ion-Exchange Method
Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/SiO2 Catalysts Prepared by Ion-Exchange Method
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发表时间：
2009
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通讯作者：
Jing Zheng;W. C. Zhu;C. Ma;M. Jia;Z. L. Wang;Y. Hou;W. Zhang
中科院分区：
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作者：
Jing Zheng;W. C. Zhu;C. Ma;M. Jia;Z. L. Wang;Y. Hou;W. Zhang
在固定床管式反应器中，考察了离子交换法制备的负载型Cu/SiO2-IE催化剂对甘油氢解反应的催化性能。与湿法浸渍法和溶胶-凝胶法制备的Cu/SiO2催化剂相比，Cu/SiO2-IE在523 K和4.0MPa的氢压下具有很高的甘油转化率（99.6%）和1，2-丙二醇选择性（86.4%）。Cu/SiO2-IE催化剂上高分散的金属铜和铜离子两种活性中心的共存是其具有良好催化活性的主要原因。
The catalytic properties of supported copper silica prepared by ion-exchange method (denoted as Cu/SiO 2 -IE) were investigated for the hydrogenolysis of glycerol in a fixed-bed tubular reactor. Compared with the Cu/SiO 2 catalyst prepared by wet impregnation and sol-gel methods, Cu/SiO 2 -IE shows very high activity (99.6% conversion of glycerol) and selectivity (86.4% to 1,2-propanediol) at 523 K and under hydrogen pressure of 4.0 MPa. The main reason for its good performance in the title reaction may be assigned to the co-existence of two types of active centers, which are the highly dispersed metallic copper and copper ions, on the Cu/SiO 2 -IE catalysts.