介孔分子筛Al-MCM-41的合成与催化异构化性能  

Synthesis and Catalytic-Isomerization Performance of Al-MCM-41 Mesoporous Sieves

作　　者：郭建维[1] 李龙焕[1] 刘卅[2] 崔亦华[1] 邓志城[1] 余林[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006 [2]华南理工大学材料学院,广东广州510640

出　　处：《光谱学与光谱分析》2007年第7期1368-1371,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20026005);广东省科技计划(2005B10301008);广东省基金团队项目(4205301)资助

摘　　要：采用正硅酸乙酯（TEOS）为硅源,九水硝酸铝为铝源,十六烷基三甲基溴化胺（CTMABr）为模板剂,在室温条件下合成了介孔Al-MCM-41分子筛。通过XRD、N2等温吸附、SEM、FTIR等分析测试手段表征了分子筛的介孔结构和表面性质。结果表明所合成的分子筛有良好的介孔结构和较高的有序度,并且有较高的比表面积（达到816 m2.g^-1）和窄的孔径分布。采用程序升温的焙烧方式、凝胶Al/Si比最大范围控制在0.06~0.13有利于合成高度有序的介孔Al-MCM-41分子筛。评价结果表明,所合成的Al-MCM-41分子筛对桥式四氢双环戊二烯（endo-TCD）异构化反应合成挂式异构体exo-TCD及金刚烷具有较高的催化活性和极高的选择性。Al-MCM-41 mesoporous sieves were synthesized at the ambient temperature by using TEOS as silica source, Al（NO）3 · 9H2O as Al source, and cetyl trimethylammonium bromide as templating agent. The framework and surface structures of the synthesized samples were characterized by XRD, N2-adsorption/desorption isotherms, FTIR and SEM etc. The results showed that the samples were the typical Al-MCM-41 mesoporous sieves with the higher ordered-degree and specific surface area （up to 816 m^2 · g^-1 ） and the narrower pore diameter distribution. Controlling the highest value of Al/Si with the range of 0. 06-0. 13, and taking temperature programmed calcination would be beneficial to the formation of the highly ordered Al-MCM- 41 mesoporous sieves. The evaluating results showed that the synthesized Al-MCM-41 molecular sieves have a higher catalytic activity for isomerization of endo-tetrahydrodicyclo-pentadiene （endo-TCD） into exo-tetrahydrodicyclo- pentadiene （exo-TCD） and adamantane.

关 键 词：介孔分子筛 AL-MCM-41 合成 催化异构化 

分 类 号：TQ424.2[化学工程]