改进型铜基甲醇合成催化剂的制备研究

Study on Preparation of Modified Copper-based Catalysts for Methanol Synthesis

在三组分铜基催化剂Ｃｕ－Ｚｎ－Ａｌ中添加少量第四组分金属氧化物助剂ＭＯ＿ｘ，制得改进型四组分铜基甲醇合成催化剂Ｃｕ－Ｚｎ－Ａｌ－Ｍ（ＸＨ４０２）；５．０ＭＰａ压力下的活性评价结果表明ＸＨ４０２催化剂合成甲醇时空得率比工业甲醇合成催化剂Ｃ３０１提高２５％。催化剂的ＸＲＤ表征显示，工作态ＸＨ４０２催化剂的活性相特征峰２θ＝４３．３２°的强度比Ｃ３０１的提高约３０％。

Modified copper-based catalyst XH402(Cu :Zn:Al:M=60:30:8:2,atomratio)for methanol synthesis was prepared by adding small amount of the metal oxide MO_x toan industrial catalyst(Cu:Zn:Al = 60:30:10).The experimental results showed that thecatalytic activity for methanol synthesis over XH402 catalyst increased 25% more than thatover C301 under the reaction condition of 5.0 MPa and 250℃. XRD studies revealed that theintensity of diffraction peak of XH402 at 43. 32°(2θ),being probably the active phase,en-hanced about 30% than that of C301.