铜锌铝催化剂催化脂肪酸甲酯加氢反应研究  

Study on hydrogenation of fatty acid methyl ester catalyzed by Cu-Zn-Al catalyst

作　　者：姜峰[1] 徐云强 徐艳[1] 赵玉军[1] JIANG Feng;XU Yunqiang;XU Yan;ZHAO Yujun(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工业与工程》2024年第5期154-163,共10页Chemical Industry and Engineering

摘　　要：研究了铜负载量以及铜锌比对铜锌铝催化剂催化月桂酸甲酯加氢制脂肪醇反应性能的影响规律。结果表明铜锌铝催化剂具有优异的脂肪酸甲酯加氢能力。在5 MPa、190℃和空速为2 h^(-1)条件下,脂肪酸酯转化率和脂肪醇选择性分别高达78.87%和89.14%,远高于Cu/Al_(2)O_(3)与Cu/ZnO催化剂。其原因在于锌物种与铜物种相互作用产生的Cu-O-Zn位点提高了Cu^(0)的催化活性,获得较高的TOF值(27.5 h^(-1))。同时,铝物种作为结构助剂增加了材料的比表面积并提高了催化剂的稳定性。进一步提高温度到210℃时,月桂酸甲酯转化率和月桂醇选择性均可高达99%,表现出较高的催化性能和应用价值。The effect of copper loading and Cu-Zn ratio on the hydrogenation of methyl laurate to fatty alcohol over Cu-Zn-Al catalyst was studied.The results show that Cu-Zn-Al catalyst has excellent hydrogenation activity of fatty acid methyl ester.Under the conditions of 5 MPa,190℃and 2 h^(-1),the conversion of fatty acid ester and selectivity of fatty alcohol are up to 78.87%and 89.14%,respectively,which are much higher than Cu/Al_(2)O_(3) and Cu/ZnO catalysts.The reason is that the Cu-O-Zn site generated by the interaction between zinc species and copper species improves the catalytic activity of Cu^(0),with a high TOF value(27.5 h^(-1)).Aluminum species as a structural promoter improve the specific surface area and enhances the stability of the catalyst.When the temperature is increased to 210℃,the conversion of methyl laurate and the selectivity of lauryl alcohol can be up to 99%,showing high catalytic performance and application value.

关 键 词：铜锌铝 脂肪酸酯 加氢 脂肪醇 

分 类 号：TQ448.21[化学工程—化学肥料工业]