硅铝复合分子筛的合成和表征以及催化性能  

The Synthesis,Characterization and Catalytic Performance Research of the Si-Al Composite Zeolite

作　　者：李凤艳[1] 张玲玲[2] 孙桂大[1] 赵天波[3] 

机构地区：[1]北京石油化工学院 [2]北京化工大学 [3]北京理工大学

出　　处：《石油化工高等学校学报》2008年第2期33-35,40,共4页Journal of Petrochemical Universities

基　　金：上海石油化工研究院973计划项目(2003CB615802)

摘　　要：通过水热法合成了一种硅铝复合分子筛。并采用XRD,氮气吸附-脱附(BET)和吡啶红外吸附光谱(IR)进行了表征。XRD测试显示此种分子筛属于六方晶相,并且只存在此单一晶相。氮气吸附-脱附测试的孔尺寸分布显示,此种分子筛具有中孔和微孔结构。吡啶红外吸附光谱显示,此种分子筛与HZSM-5分子筛相比,具有更多的B酸和L酸中心。由于中孔结构的存在和较强的酸性,对于大分子烃1,3,5-三异丙基苯的催化裂化反应,此种分子筛的活性远大于HZSM-5分子筛。A kind of Si- Al composite zeolite was synthesized by hydrothermal method and characterized by XRD, nitrogen adsorption-desorption and IR. The results of XRD show that the zeolite belongs to hexagonal symmetry, and it is a pure phase. The composited zeolite possesses both microporous and mesoporous structures base on the pore size distributions, and presents much more Bronsted and Lewis acidic sites than HZSM- 5. The catalytic cracking activity of 1, 3, 5- triisopropylbenzene over the hierarchical zeolite is more than that over HZSM-5 due to its mesopore structure and more acid amount.

关 键 词：硅铝复合分子筛 催化裂化 中孔-微孔 HZSM-5 

分 类 号：O643.3[理学—物理化学]