微波制备CuCl_2/SiO_2-TiO_2催化剂的结构及其催化性能  

Structure and catalytic activity of CuCl_2/SiO_2-TiO_2 catalysts prepared under microwave irradiation

作　　者：姜少华[1] 任军[2] 

机构地区：[1]五邑大学化学与环境工程系,广东江门529020 [2]太原理工大学煤科学与技术教育部和山西省重点实验室,山西太原030024

出　　处：《工业催化》2010年第2期21-24,共4页Industrial Catalysis

摘　　要：采用浸渍法将CuCl_2分散到SiO_2-TiO_2载体表面,微波炉处理一定时间得到催化剂样品,考察了样品在甲醇氧化羰基化反应中的催化活性。结果表明,样品中负载CuCl_2物质的量分数为15%时,活性最佳,甲醇转化率和碳酸二甲酯选择性分别为8.25%和85.01%。微波辐射导致CuCl_2高度分散于SiO_2-TiO_2上,并与载体表面发生键合作用,降低了催化剂中对设备具有腐蚀作用的Cl含量,同时形成结构稳定的活性铜物种。Catalyst samples for oxidative carbonylation of methanol to dimethyl carbonate （ DMC ） in liquid phase were prepared by incipient wetness impregnation of SiO2-TiO2 in CuCl2 solution followed by micro- wave irradiation treatment. The results showed that optimal catalytic activity was attained over CuCl2/ SiO2-TiO2 with initial copper concentration of 15mol%, with methanol conversion and selectivity to DMC of 8.25% and 85.01%, respectively. CuCl2 was highly dispersed over surface of SiO2-TiO2 and bonded to the support after microwave irradiation. Microwave irradiation also reduced content of Cl in the catalyst, which was highly corrosive to reactor, and resulted in formation of structurally stable copper species.

关 键 词：催化剂工程 碳酸二甲酯 氧化羰基化 铜催化剂 微波辐射 固态离子交换 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]