MgO沉积改性HZSM-12分子筛的结构表征与催化性能  

Characterization and catalytic performance of MgO modified HZSM-12 zeolite

作　　者：吴伟[1] 孙可一[1] 闫鹏飞[1] 

机构地区：[1]黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080

出　　处：《现代化工》2008年第5期50-53,共4页Modern Chemical Industry

基　　金：黑龙江省科学技术计划项目(2006G1660-00);哈尔滨市科学研究计划项目(2004AFXXJ048)

摘　　要：采用化学液相沉积法用MgO对HZSM-12分子筛进行表面沉积改性,对改性分子筛的结构、酸性进行了表征,研究了改性HZSM-12分子筛对萘和甲醇烷基化的催化反应性能。结果表明MgO与HZSM-12分子筛的表面羟基发生作用,减少了分子筛的Bronsted酸中心,而产生了新的Lewis酸中心。用于催化萘和甲醇烷基化的反应结果表明,由于MgO沉积减少了HZSM-12分子筛的强酸中心,有效地提高了HZSM-12分子筛的抗积炭失活能力。Magnesitml oxide is used to modify HZSM-12 by the surface chemical liquid deposition technique, and the structure and acidic property of the modified one are characterized. The catalytic properties are studied using the methylafion of naphthalene with methanol as a test reaction. The results show that the interaction of magnesium oxide and bridging hydroxyl groups can decrease Bronsted acid sites of HZSM-12 and form new Lewis acid sites. In the mehtylation of naphthalene with methanol, the modified HZSM-12 exhibits excellent catalytic stability for magnesium oxide removes the strong acid sites of HZSM-12.

关 键 词：氧化镁 化学液相沉积 HZSM-12分子筛 萘烷基化 

分 类 号：TQ426.6[化学工程]