用于低温液相合成甲醇的铜铬铝催化剂的研制与表征  

Preparation and Characterization of Cu-Cr-Al Based Catalysts for Low-temperature Methanol Synthesis in Liquid Phase

作　　者：储伟[1] 何川华[1] 戴晓雁[1] 邱发礼[2] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]中科院成都有机所,四川成都610041

出　　处：《四川大学学报（工程科学版）》2003年第6期1-4,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(29903011);973国家重点子专题项目资助;四川省青年基金资助(459-2000)

摘　　要：应用共沉淀法和胶态共沉淀法制备了铜铬铝复合氧化物催化剂。用高压反应、XRD、TPR、TPD、TEM、BET、DTG等方法对催化剂进行表征,考察了催化剂的制备方法和铝含量对低温液相合成甲醇的活性、选择性和稳定性的影响。结果表明,胶态共沉淀法制备的铜铬铝催化剂的反应活性和稳定性最好,铝含量有一最佳值,铝元素的加入使催化剂中活性组分更加分散,催化剂的比表面增大,对原料分子CO和H2的吸附能力增强,这是其活性和稳定性提高的主要原因。The novel Cu-Cr-Al based catalysts were prepared by the method of coprecipitation from solstate,and its performance was investigated in a batch reactor for lowtemperature methanol synthesis (LTMS). The catalysts were characterized by XRD, TPR, TPD, TEM and DTG techniques. It was shown that coprecipitation from solstate has the best results of activity and selectivity among the three methods applied. The addition of alumina into Cu-Cr catalysts could enable a higher dispersion of active components enhancing the adsorption capacity of CO and/or H2, and resulted in a higher catalytic activity and an improved selectivity.

关 键 词：铜铬铝催化剂 低温液相合成 浆态三相合成 甲醇 反应活性 稳定性 性能表征 

分 类 号：O623.411[理学—有机化学] O643.36[理学—化学]