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    Tailoring the Transport Properties of Zeolitic Imidazolate Frameworks by Post-Synthetic Thermal Modification

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    Type
    Article
    Authors
    Zhang, Chen
    Koros, William J.
    KAUST Grant Number
    KUS-I1-011-21
    Date
    2015
    Permanent link to this record
    http://hdl.handle.net/10754/673105
    
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    Abstract
    Understanding how to control transport properties of zeolitic imidazolate frameworks (ZIFs) is critical to extend ZIF-based membranes and adsorbents to a wide spectrum of gas and vapor separations. In this work, we report a facile post-synthetic thermal modification (PSTM) technique to tailor ZIFs' transport properties by balancing diffusivity and diffusion selectivity. With controllable dissociation of framework methyl groups from a precursor ZIF (ZIF-8), we have prepared thermally modified ZIFs showing substantially increased n-butane diffusivity and attractive n/iso-butane diffusion selectivity. Hybrid ZIF/polymer mixed-matrix membranes formed using these thermally modified ZIFs are expected to deliver attractive butane isomer separation performance. Membranes based on such materials can potentially be used to retrofit refinery alkylation units for producing premium gasoline blending stocks.
    Citation
    Zhang, C., & Koros, W. J. (2015). Tailoring the Transport Properties of Zeolitic Imidazolate Frameworks by Post-Synthetic Thermal Modification. ACS Applied Materials & Interfaces, 7(42), 23407–23411. doi:10.1021/acsami.5b07769
    Sponsors
    W.J.K. acknowledges financial support from Roberto C. Goizueta, Chair for Excellence in Chemical Engineering, King Abdullah University of Science and Technology (Award KUS-I1-011-21), and Office of Basic Energy Science of the U.S. Department of Energy (Grant DE-FG02-04ER15510).
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS APPLIED MATERIALS & INTERFACES
    DOI
    10.1021/acsami.5b07769
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsami.5b07769
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.5b07769
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