Cu-MgO/USY催化甘油氢解制丙二醇

摘要

A series of acid-base bifunctional catalysts composed of USY with different Cu and MgO loadings were prepared, characterized, and tested for the hydrogenolysis of glycerol. The USY support re-tained the Y zeolite structure, and the introduction of MgO enhanced the dispersion of Cu in the support. At 200 °C, 3.5 MPa H2, 10 h and with a 6%0.2Cu-MgO/USY catalyst, 83.6%conversion of glycerol with 40%selectivity to 1,2-propanediol (1,2-PDO) and 19.4%selectivity to 1,3-propanediol (1,3-PDO) was achieved.%以USY为载体制备了一系列不同Cu和MgO负载量的酸碱双功能催化剂Cu-MgO/USY用于甘油氢解制丙二醇反应,并采用X射线粉末衍射、透射电镜、傅里叶红外光谱、NH3程序升温脱附等手段对该催化剂进行了表征.结果表明,负载后的USY载体其Y沸石特征峰保持完整,且MgO的加入提高了Cu在载体表面的分散度.在200ºC,3.5 MPa H2下反应10 h以及6%催化剂0.2Cu-MgO/USY (0.2 g Cu与1.0 g MgO负载于1.0 g USY上面)用量的条件下,甘油转化率达到83.6%,1,2-丙二醇及1,3-丙二醇的选择性分别为40%和19.4%.