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    Highly selective conversion of methanol to propylene: design of an MFI zeolite with selective-blockage of (010) surfaces

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    Type
    Article
    Authors
    Cai, Dali
    Wang, Ning
    Chen, Xiao
    Ma, Yunhai
    Hou, Yilin
    Li, Xinghua
    Zhang, Chengxi
    Chen, Zhaohui
    Song, Wenlong
    Arslan, Muhammad Tahir
    Li, Yiru
    Wang, Yao
    Qian, Weizhong
    Wei, Fei
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Physical Science and Engineering (PSE) Division
    Date
    2019
    Permanent link to this record
    http://hdl.handle.net/10754/631809
    
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    Abstract
    As an important catalyst of methanol-to-propylene (MTP), ZSM-5 zeolite has an anisotropic diffusion path and large pore size, resulting in the formation of undesirable heavy aromatic by-products Herein, we developed a surface-specific silica deposition method to block straight channels of nanosized ZSM-5 crystals selectively. By such coating method, we can selectively suppress the yield of aromatics from the original 13% to 2.4% at 100% conversion of methanol. Trapped hydrocarbon pool species are directly confirmed by Aberration-Corrected S/TEM for the first time. Such a method of trapping and restricting hydrocarbon pool species in multiscale zeolite with 10-membered rings would significantly benefit its catalytic efficiency and olefin diffusion. Moreover, this is providing new methodologies for zeolite structure construction and will be greatly beneficial to industrial MTP process.
    Citation
    Cai D, Wang N, Chen X, Ma Y, Hou Y, et al. (2019) Highly selective conversion of methanol to propylene: design of an MFI zeolite with selective-blockage of (010) surfaces. Nanoscale. Available: http://dx.doi.org/10.1039/c8nr10371b.
    Sponsors
    This research is funded by the National Natural Science Foundation of China (91434122), National Key R&D Program of China (2017YFB0602204 and 2018YFB0604803). All the calculations are supported by Tsinghua National Laboratory for Information Science and Technology (National Research Center of Information Science and Technology, Beijing). We thank Prof. Yu Han at KAUST for his advice.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Nanoscale
    DOI
    10.1039/c8nr10371b
    Additional Links
    https://pubs.rsc.org/en/Content/ArticleLanding/2019/NR/C8NR10371B#!divAbstract
    ae974a485f413a2113503eed53cd6c53
    10.1039/c8nr10371b
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division

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