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    Nanohybrid thin-film composite carbon molecular sieve membranes

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    Name:
    Hybrid Carbon Membranes_Manu_revised_2nd.pdf
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    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Ogieglo, Wojciech cc
    Puspasari, Tiara cc
    Hota, Mrinal Kanti cc
    Wehbe, N.
    Alshareef, Husam N. cc
    Pinnau, Ingo cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Engineering Program
    Core Lab, King Abdullah University of Science and Technology, 23955, Thuwal, Saudi Arabia
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    BAS/1/1323-01-01
    Date
    2019-11-06
    Online Publication Date
    2019-11-06
    Print Publication Date
    2020-03
    Embargo End Date
    2020-11-06
    Submitted Date
    2019-07-01
    Permanent link to this record
    http://hdl.handle.net/10754/661450
    
    Metadata
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    Abstract
    Industrial separations belong to some of the most energy-intensive technological processes because of the reliance on heat-consuming unit operations involving a phase change, such as distillation. Membrane technology promises large cuts to those energy needs; however, its progression is hindered as currently available membranes lack separation performance as well as chemical and mechanical stability. To address these challenges, carbon molecular sieves (CMSs) have long been suggested as promising candidates providing excellent and robust molecular separation performance. In this work, we introduce nanohybrid CMS membranes fabricated by pyrolyzing a polyimide of intrinsic microporosity (PIM-PI) precursor modified by vapor phase infiltration (VPI). In the VPI process, a metal-organic precursor, trimethylaluminum (TMA), first diffuses into the high free volume matrix of the PIM-PI to form a complex with its functional groups. Afterward, water vapor selectively and locally oxidizes the TMA to form nanodispersed Al2O3 within the PIM-PI matrix. Subsequent inert-atmosphere pyrolysis leads to the formation of Al2O3-doped, high-quality, thin-film composite CMS membranes with excellent molecular separation properties for a number of technologically important gas pairs, e.g. CO2/CH4 > 100, O2/N2 > 9. The introduction of VPI-doped hybrid CMS membranes allows obtaining extraordinary gas separation performance typical to high temperature undoped CMS at much lower pyrolysis temperatures. This presents significant advantages such as reduction of mechanical failure risk, wider spectrum of possible supports, and reduced fabrication complexity.
    Citation
    Ogieglo, W., Puspasari, T., Hota, M. K., Wehbe, N., Alshareef, H. N., & Pinnau, I. (2020). Nanohybrid thin-film composite carbon molecular sieve membranes. Materials Today Nano, 9, 100065. doi:10.1016/j.mtnano.2019.100065
    Sponsors
    This work was supported by KAUST baseline funding for I.P.(BAS/1/1323-01-01). W.O. is thankful for an extensive possibility to use KAUST Solar Center facilities for ellipsometry characterization.
    Publisher
    Elsevier BV
    Journal
    Materials Today Nano
    DOI
    10.1016/j.mtnano.2019.100065
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S2588842019301348
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.mtnano.2019.100065
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Material Science and Engineering Program

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