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    Enhanced Performance of a Novel Polyvinyl Amine/Chitosan/Graphene Oxide Mixed Matrix Membrane for CO<inf>2</inf> Capture

    Access Status
    Fulltext not available
    Authors
    Shen, Y.
    Wang, H.
    Liu, Jian
    Zhang, Y.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Shen, Y. and Wang, H. and Liu, J. and Zhang, Y. 2015. Enhanced Performance of a Novel Polyvinyl Amine/Chitosan/Graphene Oxide Mixed Matrix Membrane for CO<inf>2</inf> Capture. ACS Sustainable Chemistry and Engineering. 3 (8): pp. 1819-1829.
    Source Title
    ACS Sustainable Chemistry and Engineering
    DOI
    10.1021/acssuschemeng.5b00409
    ISSN
    2168-0485
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/72802
    Collection
    • Curtin Research Publications
    Abstract

    © 2015 American Chemical Society. In this study, a facilitated transport mixed matrix membrane was fabricated by a surface coating method. Polyvinyl amine (PVAm) and chitosan (Cs) were used as the polymer matrix materials and coated onto a porous polysulfone (PS) support. Graphene oxide (GO) grafted with hyperbranched polyethylenimine (HPEI-GO) was added as the nanofiller. The gas separation tests with CO<inf>2</inf>/N<inf>2</inf> (10:90 v:v) mixed gas suggest that the addition of GO could improve CO<inf>2</inf>/N<inf>2</inf> selectivity. The highest CO<inf>2</inf> permeance was 36 GPU in the membrane with 2.0 wt % HPEI-GO, and the optimal selectivity was 107 in the membrane with 3.0 wt % HPEI-GO. Herein, GO could provide a transport channel for CO<inf>2</inf> and enhance the long-term stability of the membranes. Further gas separation tests under various relative humidities confirmed that facilitated transport was the main mechanism of gas separation through the membrane. The stability test suggests that the membrane has long-term stability. CO<inf>2</inf> transports through the membrane mainly by the facilitated transport mechanism with assistance from the solution-diffusion mechanism, while N<inf>2</inf> transports only by the solution-diffusion mechanism.

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