不同方法制备Cu/SiO2催化剂对草酸二甲酯加氢反应性能的影响  

Effect of Cu/SiO2 Catalysts Prepared by Different Methods on the Hydrogenation of Dimethyl Oxalate

作　　者：陆一鸣 王明 伞晓广[1] LU Yi-ming;WANG Ming;SAN Xiao-guang(Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China)

机构地区：[1]沈阳化工大学,辽宁沈阳110142

出　　处：《当代化工》2020年第6期1139-1141,共3页Contemporary Chemical Industry

摘　　要：采用蒸氨法、沉淀法和水热法制备的Cu催化剂,通过XRD、SEM、BET手段对催化剂进行表征,研究了球形催化剂材料的成型机理,探讨催化剂的组成结构与催化剂性能之间的关系。实验结果表明:通过水热法制备的催化剂更加均匀稳定,比表面积更大。片层状结构能够有效的提高反应介质之间的传质传热效应,加强中间产物乙二醇进一步加氢,从而提高乙醇的选择性。在300℃和2MPa的相对温和条件下,Cu/SiO2催化剂具有高活性,乙醇选择性高达80.33%,DMO转化率极高。Cu catalysts prepared by ammonia evaporation,hydrothermal method and precipitation methods were characterized by XRD,SEM and BET.The forming mechanism of spherical catalyst materials was studied,and the relationship between catalyst composition and catalyst performance was discussed.The experimental results showed that the catalyst prepared by precipitation method was more uniform and stable,and the specific surface area was larger.The lamination structure effectively improved the mass transfer and heat transfer effect between reaction media to enhance the further hydrogenation of the intermediate ethylene glycol,so as to improve the selectivity of ethanol.Cu/SiO2 catalyst had high activity,the ethanol selectivity was up to 80.33%,and DMO conversion rate was very high at 300℃and 2 MPa.

关 键 词：草酸二甲酯 加氢催化 乙醇 

分 类 号：TQ426[化学工程]