1. Department of Chemical Engineering,Guangdong University of Technology，Guangzhou 510006,China 2. College of Material Science and Engineering,South China University of Technology,Guangzhou 510640,China
Abstract：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 m2·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.
