CuY分子筛制备及催化甲醇氧化羰基化研究进展

Advances in preparation methods of CuY zeolites and their catalytic behavior for oxidative carbonylation of methanol

介绍了三种常见的Cu Y分子筛制备方法,相对于浸渍法,溶液离子交换法与固态离子交换法,虽然铜负载量较低,但能够使铜组分均匀分布于与分子筛孔道结构中,并且对Y型分子筛结构的破坏相对较小。Y型分子筛中铜离子的落位是决定其活性中心的关键因素,通过探针红外与H_2-TPR表征可以有效监测分子筛中的铜离子落位。另外,将助剂阳离子引入分子筛后能够使铜离子更多的落位于分子筛的超笼中。同时,还介绍了Cu Y催化剂在甲醇气相氧化羰基化反应中的研究成果。

Three common preparation methods of Cu Y zeolites were introduced. Although, relative to the impregnation method,the solution ion exchange and solid-state ion exchange methods had lower copper loading, they could make copper component distribute more evenly in the channel structure of the zeolites and had smaller damage to the structure of Y zeolite. The local environment of copper ions in Y zeolites was the key factor to determine the active centers, and it could be effectively monitored by means of IR and H_2-TPR. The introduction of the cations promoted Cu to locate in the supercage of zeolite. The recent researches on the catalytic behavior of Cu Y zeolites for gas phase oxidative carbonylation of methanol were also summarized.