采用共沉淀法制备用于甘油氢解制备1，2-丙二醇的Cu-ZnO-Al₂O₃催化剂，考察了不同沉淀剂对催化性能的影响。结果表明，以NaOH+Na₂CO₃为沉淀剂制备的Cu-ZnO-Al₂O₃催化剂具有较高的催化活性，在温度210℃、压力5 MPa的条件下反应12 h，甘油转化率达到98.3%，1，2-丙二醇的选择性为93.1%，催化剂重复使用5次依然具有较高的活性。利用BET、XRD、H₂-TPR和NH₃-TPD分析手段对催化剂进行表征，结果发现不同沉淀剂直接影响Cu-ZnO-Al₂O₃催化剂的物相结构、还原性质和表面酸性，并导致催化剂性能发生显著变化。

CuO-ZnO-Al₂O₃ catalyst for glycerol hydrogenolysis to 1,2-propanediol (1,2-PDO) is prepared by coprecipitation method.The effects of different precipitants on the structure and catalytic performance of the catalyst are studied.The results show that the Cu-ZnO-Al₂O₃ catalyst with NaOH+Na₂CO₃ as the precipitant exhibits a higher catalytic activity,over which the conversion of glycerol reaches 98.3% and the selectivity of 1,2-PDO reaches 93.1% at the reaction conditions of 210℃,5 MPa and 12 h.The catalyst can hold a high activity after five recycles of reaction.Its physical and chemical properties are characterized by means of BET,XRD,H₂-TPR and NH₃-TPD.It is shown different precipitants have obvious effects on the phase structure,reduction property and surface acidity of catalysts,and further leading to a great change in catalytic performances.

陈奕含(1994-),女,硕士研究生,研究方向为绿色化工的工艺开发与利用,chenyihan529@163.com