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用浸渍-燃烧法制备了固体超强碱Mg O-Ca O和Mg O-Sr O负载的高分散铜基催化剂,并将其用于甘油氢解制备1,2-丙二醇的反应。N2吸附、X射线衍射、透射电子显微镜、H2程序升温还原和N2O氧化吸附及CO2程序升温脱附等表征实验结果显示:Cu粒子均分散于Cu/Mg O-Ca O(或者Cu/Mg O-Sr O)催化剂的表面;与Cu/Mg O相比,Cu/Mg O-Ca O和Cu/Mg O-Sr O具有更强的碱性,可以加速甘油的转化。上述结果表明,甘油氢解反应中铜催化剂的活性随碱性的增强而增加。
The solid superbase MgO-CaO and MgO-SrO supported highly dispersed copper-based catalysts were prepared by impregnation-combustion method and used for the reaction of 1,2-propanediol by hydrogenolysis of glycerol. The results of N2 adsorption, X-ray diffraction, transmission electron microscopy, temperature-programmed reduction with H2, N2O oxidation and CO2 temperature-programmed desorption showed that the Cu particles were dispersed in Cu / Mg O-CaO SrO) catalysts; Cu / MgO-CaO and Cu / MgO-SrO are more basic than Cu / MgO and can accelerate the conversion of glycerol. The above results show that the activity of copper catalyst in the hydrogenolysis reaction of glycerol increases with the increase of alkalinity.