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    Modified Dendritic Mesoporous Silica Nanospheres Composites: Superior Pore Structure and Acidity for Enhanced Hydrodesulfurization Performance of Dibenzothiophene

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    Modified Dendritic Mesoporous Silica Nanospheres.pdf
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    1.170Mb
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    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Shi, Yu
    Xiao, Chengkun
    Mei, Jinlin
    Alabsi, Mohnnad H.
    Wang, Gang
    Ni, Yan
    Zhao, Zhen
    Duan, Aijun cc
    Wang, Xilong
    KAUST Department
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2020-06-15
    Online Publication Date
    2020-06-15
    Print Publication Date
    2020-07-16
    Embargo End Date
    2021-06-15
    Submitted Date
    2020-04-24
    Permanent link to this record
    http://hdl.handle.net/10754/664609
    
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    Abstract
    Dendritic mesoporous silica nanospheres (DMSNs) with a center-radical pore structure were successfully fabricated with ZSM-5 seeds to synthesize hierarchically meso-microporous ZSM-5/DMSN (ZD) materials which were used as the support for preparing HDS catalysts. The catalytic activities were evaluated by adopting DBT as the model oil. ZD composites and the corresponding catalysts were well characterized by XRD, XPS, HRTEM, and other techniques. The characterization results manifested that the specific center-radical pore structure was retained after incorporation of microporous zeolite ZSM-5; thus, ZD exhibited a wide pore diameter of about 17 nm, which was definitely preferable for mass transfer in the S removal process. Meanwhile, the open pore channels enhanced the accessibility of the active sites on the internal surface of the catalysts. Introducing ZSM-5 seeds into the framework of DMSNs also improved the acidity and modulated the metal-support interaction as well. As a result, NiMo/ZD series catalysts demonstrated high HDS activities, of which NiMo/ZD-3 achieved the highest HDS efficiency of 98.3%. The superior catalytic performance not only originated from the large center-radical pore structure and good acidity of support but also related to the suitable metal-support interaction and perfect dispersion of the metallic active sites.
    Citation
    Shi, Y., Xiao, C., Mei, J., Alabsi, M. H., Wang, G., Ni, Y., … Wang, X. (2020). Modified Dendritic Mesoporous Silica Nanospheres Composites: Superior Pore Structure and Acidity for Enhanced Hydrodesulfurization Performance of Dibenzothiophene. Energy & Fuels, 34(7), 8759–8768. doi:10.1021/acs.energyfuels.0c01325
    Sponsors
    This research was supported by the National Natural Science Foundation of China (Nos. 21878330 and 21676298), the National Science and Technology Major Project, the CNPC Key Research Project (2016E-0707), and the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award (No. OSR-2019-CPF-4103.2).
    Publisher
    American Chemical Society (ACS)
    Journal
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.0c01325
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.energyfuels.0c01325
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.energyfuels.0c01325
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

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