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  • Title: [Synthesis and catalytic-isomerization performance of Al-MCM-41 mesoporous sieves].
    Author: Guo JW, Li LH, Liu S, Cui YH, Deng ZC, Yu L.
    Journal: Guang Pu Xue Yu Guang Pu Fen Xi; 2007 Jul; 27(7):1368-71. PubMed ID: 17944416.
    Abstract:
    Al-MCM-41 mesoporous sieves were synthesized at the ambient temperature by using TEOS as silica source, Al(NO)3 x 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 x 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.
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