负载型双功能催化剂作用下的碳酸二甲酯直接合成

采用浸渍法制备了双组分负载型催化剂 ,研究了催化剂对二氧化碳、环氧丙烷和甲醇直接合成碳酸二甲酯反应的催化性能 ,考察了反应温度、负载量、反应压力以及载体粒径对碳酸二甲酯收率的影响。结果表明 ,以ZnO为载体的双组分催化剂具有良好的催化活性 ;最佳反应温度为 16 0℃ ;活性组分负载量在 10 %时碳酸二甲酯收率最高 ;压力的影响并不明显 ;载体粒径的减小有助于碳酸二甲酯的生成。

Direct synthesis of dimethyl carbonate over the two-component supported catalyst

Some two component catalysts supported on inorganic oxides were prepared by wet impregnation and their catalytic performances for the direct synthesis of dimethyl carbonate from carbon dioxide, propylene oxide and methanol were studied. The influences of reaction temperature, amount of catalyst, reaction pressure and size of support on the synthetic reaction were investigated. The results showed that two component catalyst supported on ZnO had good catalytic activity and optimum reaction temperature was 160℃. The highest yield of DMC was obtained over a catalyst with 10% active component. The influence of reaction pressure was not obvious, and the decrease of the size of support favored the formation of DMC.