利用蒸氨法添加MgO制备Cu-MgO/SiO₂催化剂，并在固定床上评价Cu/SiO₂催化剂对乙酸加氢制乙醇的影响。在T=320℃、p=2 MPa、LHSV=0.6 h^-1、氢酸比为5的工艺条件下，利用Cu-MgO/SiO₂催化剂进行乙酸加氢反应获得较好的催化活性。通过BET、H₂-TPR、FT-IR手段对其进行表征，结果表明，助剂MgO可以提高催化剂的层状硅酸铜含量、增大比表面积、促进铜物种的分散性及增强铜物种与载体之间的相互作用。

Cu-MgO/SiO₂ catalyst is prepared by adding MgO in ammonia evaporation method.The effect of Cu-MgO/SiO₂ catalyst on the hydrogenation of acetic acid to ethanol is evaluated in a fixed bed.Cu-MgO/SiO₂ catalyst exhibits better catalytic activity for the hydrogenation of acetic acid when the ratio of hydrogen to acetic acid is 5,LHSV=0.6 h^-1,320℃ and 2 MPa.It is found by BET,H₂-TPR and FT-IR that the addition of MgO can increase the content of layered copper silicate,expand specific surface area,promote the dispersion of copper species and enhance the interaction between copper species and support.

常苏杰(1992-),男,硕士研究生,研究方向为能源催化,changsujie1993@163.com