Modification of Rh/SiO2 catalyst for the hydrogenolysis of glycerol in water
Modification of Rh/SiO2 catalyst for the hydrogenolysis of glycerol in water
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DOI：
10.1016/j.apcatb.2009.11.021
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发表时间：
2010-02
影响因子：
22.1
通讯作者：
Y. Shinmi;Shuichi Koso;T. Kubota;Y. Nakagawa;K. Tomishige
中科院分区：
文献类型：
--
作者：
Y. Shinmi;Shuichi Koso;T. Kubota;Y. Nakagawa;K. Tomishige
在Rh/ sio2中加入Re、Mo和W，提高了以水为溶剂水解甘油的催化活性。稀土改性得到的1,3-丙二醇（1,3- prd）的转化率和产率最高。优化后的Rh- reox /SiO2（Re/Rh=0.5）催化剂在低H2pressure和高反应温度条件下对丙二醇保持了较高的选择性，抑制了C-C键断裂，其中Rh/SiO2对C-C键断裂具有较强的活性。表征结果表明，在Rh金属颗粒表面形成了reox团簇。这可以引起reox2和Rh之间的协同作用，并且甘油氢解在Rh金属表面和附着的reox2之间的界面上进行。
Addition of Re, Mo and W to Rh/SiO2enhanced the catalytic activity of the glycerol hydrogenolysis using water as a solvent. The modification with Re gave the highest conversion and yield of 1,3-propanediol (1,3-PrD). The optimized Rh-ReOx/SiO2(Re/Rh=0.5) catalyst maintained high selectivity to propanediols and suppressed C–C bond breaking even under low H2pressure and high reaction temperature, where Rh/SiO2is rather active to C–C bond breaking. Characterization results indicate the formation of ReOxclusters attached to the surface of Rh metal particles. This can cause the synergy between ReOxand Rh, and the glycerol hydrogenolysis proceeds on the interface between Rh metal surface and attached ReOxspecies.