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以经氧化钙和氧化硼改性的氧化铝为载体,采用浸渍法制备了负载型CuO/Al2O3催化剂,采用XRD、BET、TPR和NH3-TPD技术对催化剂CuO/Al2O3进行了表征.结果表明,氧化硼既可以作为结构性助剂提高铜在催化剂表面的分散度,又可以作为电子性助剂有利于催化剂表面氧化铜物种的稳定;氧化钙的引入降低了催化剂表面酸性,有利于催化剂的选择性提高.采用氧化硼和氧化钙改性的Cu10B20Ca30为催化剂,醋酸仲丁酯转化率可达99.5%,生成仲丁醇和乙醇的选择性分别达98.9%和97.8%.
The supported CuO / Al2O3 catalysts were prepared by impregnation method using alumina modified by calcium oxide and boron oxide as support, and the catalysts CuO / Al2O3 were characterized by XRD, BET, TPR and NH3-TPD techniques. Boron oxide can not only improve the copper dispersion on the catalyst surface but also act as an electron assistant to stabilize the copper oxide species on the catalyst surface; the introduction of calcium oxide reduces the acidity of the catalyst surface, which is in favor of catalyst selection The conversion of sec-butyl acetate was up to 99.5% with the Cu10B20Ca30 modified by boron oxide and calcium oxide as catalyst, and the selectivity to sec-butanol and ethanol was 98.9% and 97.8% respectively.