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    Synthesis of mesoporous silica material with ultra-large pore sizes and the HDS performance of dibenzothiophene

    Access Status
    Fulltext not available
    Authors
    Song, S.
    Zhou, X.
    Duan, A.
    Zhao, Z.
    Chi, K.
    Zhang, M.
    Jiang, G.
    Liu, Jian
    Li, J.
    Wang, X.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Song, S. and Zhou, X. and Duan, A. and Zhao, Z. and Chi, K. and Zhang, M. and Jiang, G. et al. 2016. Synthesis of mesoporous silica material with ultra-large pore sizes and the HDS performance of dibenzothiophene. Microporous and Mesoporous Materials. 226: pp. 510-521.
    Source Title
    Microporous and Mesoporous Materials
    DOI
    10.1016/j.micromeso.2016.01.034
    ISSN
    1387-1811
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/31424
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Elsevier Inc. Ultra-large mesoporous silica materials using different micelle expanders including hexane, cyclohexane, 1,3,5-triisopropylbenzene and 1,3,5-triethylbenzene, have been successfully synthesized by the template of polymer surfactant of P123 (Aldrich, EO20PO70EO20). Among all the used micelle expanders, highly ordered cubic mesoporous silica material (SBA-16@hexane) with ultra-large pore size was obtained by using hexane. All the obtained samples were well characterized by small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM), nitrogen adsorption-desorption, UV-vis diffuse reflectance spectroscopy (DRS), H2-TPR, pyridine-FTIR, 27Al MAS NMR, GC-MS and Raman. The synthesis mechanism was also proposed. Compared with the conventional SBA-16 (6.31 nm) synthesized taking polymer surfactant of F127 (propylene oxide block copolymer) as the template, the as-synthesized SBA-16@hexane had a pore diameter of 15.1 nm with a highly ordered mesostructure, which was the largest one among all the reported pore sizes of SBA-16 materials. The corresponding hydrodesulfurization (HDS) catalysts of NiMo/Al-SBA-16@hexane, NiMo/?-Al2O3, and NiMo/Al-SBA-16 were prepared by using different supports respectively, furthermore, their HDS performances were evaluated adopting dibenzothiophene (DBT) as the probe reactant. The DBT HDS efficiencies over these catalysts followed the order: NiMo/Al-SBA-16@hexane > NiMo/?-Al2O3 > NiMo/Al-SBA-16. The high activity of NiMo/Al-SBA-16@hexane can be attributed to the superior diffusivity of the novel support of SBA-16@hexane with ultra-large pore size.

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