Mn助剂对Cu基催化剂乙酸乙酯加氢制乙醇反应性能的影响  

Effect of Mn promoter on Cu-based catalyst for hydrogenation of ethyl acetate to ethanol

作　　者：王超[1] 张海涛[1] 马宏方[1] 钱炜鑫[1] 应卫勇[1] 房鼎业[1] 

机构地区：[1]华东理工大学化工学院,大型工业反应器工程教育部工程中心,化学工程联合国家重点实验室,上海200237

出　　处：《天然气化工—C1化学与化工》2016年第6期66-71,共6页Natural Gas Chemical Industry

基　　金：国家科技支撑计划项目(2006BAE02B02)

摘　　要：采用并流共沉淀法制备了不同n(Mn)/n(Al)的Cu基催化剂,考察了Mn助剂对催化剂乙酸乙酯加氢制乙醇反应性能的影响,采用N_2低温吸附、N_2O化学吸附、XRD、H_2-TPR和H_2-TPD对催化剂进行了表征。实验结果表明,Mn助剂的添加促进了催化剂中活性组分Cu的分散,促进了CuO的还原,提高了Cu的比表面积,增加了催化剂表面的活性位,有利于H_2和乙酸乙酯的吸附,从而提高了催化剂的活性。在260℃、2MPa、MHSV为1.6h^(-1)、氢酯物质的量比为4的反应条件下,当n(Mn)/n(Al)为1时,催化剂上乙酸乙酯转化率和乙醇选择性分别达到75.86%和95.23%。The Cu-based catalysts with different Mn/Al molar ratio from 0 to 1 were prepared by a co-precipitation method. The catalysts were tested for hydrogenation of ethyl acetate to ethanol and characterized by N2 adsorption, N2O chemisorption, XRD, H2-TPR and H2-TPD. The results showed that the addition of Mn was favorable for the dispersion of Cu and the reduction of CuO. After adding Mn to the catalyst, the Cu surface area increased and led to more active sites on the surface of catalysts, which was beneficial to the adsorption of H2 and ethyl acetate, hence the catalytic performance was better. When Mn/A1 molar ratio was 0.6, the ethyl acetate conversion and ethanol selectivity reached 75.86% and 95.23% under the reaction conditions of 260℃, 2MPa, WHSV of 1.6h-1 and n（H2）/n（ethyl acetate） of 4.

关 键 词：Cu基催化剂 MN 乙酸乙酯加氢 乙醇 

分 类 号：O643.3[理学—物理化学] TQ223.122[理学—化学]