Continuous facilitated transport pathway constructed by in-situ interlinkage of mobile aniline with fixed carriers distributing along nanofibers for carbon capture.
In: Journal of Membrane Science, Jg. 697 (2024-03-20), S. N.PAG
academicJournal
Zugriff:
Facilitated transport membrane with fixed and mobile carriers is essential yet challenging to improve the CO 2 capture. Herein, a facilitated transport membrane with continuous pathway was constructed by the in-situ interlinkage of mobile aniline with the fixed carriers distributing along electrospun polyacrylonitrile (PAN) nanofibers. In this membrane, fixed amine carriers are introduced through the alkalinous hydrolysis of PAN fibers (HPAN), and are distributed along the HPAN fibers to construct a long-range continuous transport pathway for CO 2. The mobile aniline carriers are introduced into the interfibrous voids of the HPAN nanofibers mat (NFM) by in-situ polymerization of Poly (ethylene glycol) diacrylate (PEGDA), which interlink the fixed amine carriers to achieve the facilitated transport pathway continuous completely. And the fixed amine and mobile aniline carriers are demonstrated to co-exist in the An/PEO@HPAN membrane (NFCM) by the FTIR and XPS results. Meanwhile, the XRD and DSC results indicate that the introduction of aniline increases the free volume of PEO matrix, which is beneficial for enhancing CO 2 permeation. Therefore, the 10 wt% An/PEO@HPAN-3h NFCM presents 90.81 % and 13.15 % increases in CO 2 permeability and CO 2 /N 2 selectivity under mixed gas at 0.3 MPa in contrast with the membrane without mobile aniline carriers. Under mixed gas conditions, this NFCM exhibits CO 2 permeability of 202.93 Barrer and CO 2 /N 2 selectivity of 83.89 at 0.1 MPa, reaching the 2019 McKeown upper bound. [Display omitted] • Fixed amine carriers are distributed along the HPAN nanofibers. • Mobile aniline carriers are introduced with in-situ polymerization of PEGDA. • Aniline interlinks the long-range continuous transport pathway in short range. • Continuous facilitated transport pathway improves CO 2 permeability. [ABSTRACT FROM AUTHOR]
Titel: |
Continuous facilitated transport pathway constructed by in-situ interlinkage of mobile aniline with fixed carriers distributing along nanofibers for carbon capture.
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Autor/in / Beteiligte Person: | Zheng, Wenji ; Jian, Xiangjun ; Shi, Zhengwen ; Li, Ziheng ; Ruan, Xuehua ; Jiang, Xiaobin ; Wang, Hanli ; Yang, Zhendong ; Li, Xiangcun ; Dai, Yan ; He, Gaohong |
Zeitschrift: | Journal of Membrane Science, Jg. 697 (2024-03-20), S. N.PAG |
Veröffentlichung: | 2024 |
Medientyp: | academicJournal |
ISSN: | 0376-7388 (print) |
DOI: | 10.1016/j.memsci.2024.122500 |
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