不同载体及制法的铜基催化剂还原性能和甲醇脱氢反应  

Reduction and reaction performance of copper catalysts for methanol dehydrogenation on different supports and prepared by different methods

作　　者：刘昭铁[1] 陆大勋[1] 郭志英[1] 

机构地区：[1]中科院山西煤炭化学研究所

出　　处：《天然气化工—C1化学与化工》1991年第5期3-7,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金委员会资助课题;北京中关村地区联合分析测试中心资助

摘　　要：在常压、250℃下考察了用浸渍法制备的Cu(im)/SiO_2和^(im)/Al_2O_3催化剂及用离子交换法制备的Cu(ex)/SiO_2催化剂上甲酵脱氢制甲酸甲酯的催化活性和选择性。实验结果表明,用离子交换法制得的Cu(ex)/SiO_2的催化活性和选择性均高于浸渍法催化剂。从TPR谱图看,Cu(ex)SiO_2只有一个还原峰,而Cu(im)/SiO_2有两个还原峰。其低温峰相当于交换Cu^(2+),高温峰相当于沉淀Cu^(2+)。Cu(im)/Al_2O_3在铜含量低时只有一个还原峰,铜含量高时出现高温峰。The samples of Cu/ SiO_2 with different Cu loading,prepared by impregnation and by ion-exchange [Cu(im)/SiO_2 and Cu(ex)/SiO_2],and Cu/ Al_2O_3 prepared by impregnation [Cu (im)/ Al_2O_3], were investigated with respect to their activity and selectivity for methanol dehydrogeation to methyi formate at 250℃ and atmospheric pressure. Cu (ex)/SiO_2is much more active and selective than Cu(im)/SiO_2. The temperature programmed reduction of Cu (ex)/SiO_2give a single relatively sharp reduction peak,while that of Cu (im)/SiO_2 give two peaks. The low temperature peak can be attributed to exchanged Cu^(2+) and the high temperature one to deposited Cu^(2+). Cu(im)/Al_2O_3 also give one TPR peak for Cu loadings less than 25wt%.

关 键 词：甲醇 脱氢 甲酸甲酯 铜基催化剂 

分 类 号：TQ225.241[化学工程—有机化工]