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    A high-flux polyimide hollow fiber membrane to minimize footprint and energy penalty for CO2 recovery from flue gas

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    Type
    Article
    Authors
    Lively, Ryan P.
    Dose, Michelle E.
    Xu, Liren cc
    Vaughn, Justin T.
    Johnson, J.R.
    Thompson, Joshua A.
    Zhang, Ke
    Lydon, Megan E.
    Lee, Jong-Suk
    Liu, Lu
    Hu, Zushou
    Karvan, Oĝuz
    Realff, Matthew J.
    Koros, William J.
    KAUST Grant Number
    KUS-I1-011-21
    Date
    2012-12
    Permanent link to this record
    http://hdl.handle.net/10754/597285
    
    Metadata
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    Abstract
    Using a process-guided approach, a new 6FDA-based polyimide - 6FDA-DAM:DABA(4:1) - has been developed in the form of hollow fiber membranes for CO 2 recovery from post-combustion flue gas streams. Dense film studies on this polymer reveal a CO 2 permeability of 224 Barrers at 40°C at a CO 2 feed pressure of 10psia. The dense films exhibit an ideal CO 2/N 2 permselectivity of 20 at 40°C, which permits their use in a two-step counter-flow/sweep membrane process. Dry-jet, wet-quench, non-solvent-induced phase inversion spinning was used to create defect-free hollow fibers from 6FDA-DAM:DABA(4:1). Membranes with defect-free skin layers, approximately 415nm thick, were obtained with a pure CO 2 permeance of 520GPU at 30°C and an ideal CO 2/N 2 permselectivity of 24. Mixed gas permeation and wet gas permeation are presented for the fibers. The CO 2 permeance in the fibers was reduced by approximately a factor of 2 in feeds with 80% humidity. As a proof-of-concept path forward to increase CO 2 flux, we incorporated microporous ZIF-8 fillers into 6FDA-DAM:DABA(4:1) dense films. Our 6FDA-DAM:DABA(4:1)/ZIF-8 dense film composites (20wt% ZIF-8) had a CO 2 permeability of 550 Barrers and a CO 2/N 2 selectivity of 19 at 35°C. Good adhesion between the ZIF and the 6FDA-DAM:DABA(4:1) matrix was observed. CO 2 capture costs of $27/ton of CO 2 using the current, "non-optimized" membrane are estimated using a custom counterflow membrane model. Hollow fiber membrane modules were estimated to have order-of-magnitude reductions in system footprint relative to spiral-wound modules, thereby making them attractive in current space-constrained coal-fired power stations. © 2012 Elsevier B.V.
    Citation
    Lively RP, Dose ME, Xu L, Vaughn JT, Johnson JR, et al. (2012) A high-flux polyimide hollow fiber membrane to minimize footprint and energy penalty for CO2 recovery from flue gas. Journal of Membrane Science 423-424: 302–313. Available: http://dx.doi.org/10.1016/j.memsci.2012.08.026.
    Sponsors
    W.J. Koros thanks Award no. KUS-I1-011-21 made by the King Abdullah University of Science and Technology (KAUST) for financial support.
    Publisher
    Elsevier BV
    Journal
    Journal of Membrane Science
    ISSN
    0376-7388
    DOI
    10.1016/j.memsci.2012.08.026
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.memsci.2012.08.026
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