Sub-micro porous thin polymer membranes for discriminating H2 and CO2

Polymeric membranes with high permeance and remarkable selectivity for simultaneous H 2 purification and CO 2 capture under industry-relevant conditions are absent. Herein, sub-micro pores with precise molecular sieving capability are created in ultra-thin (13–30 nm) polymer membranes via controllab...

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Bibliographic Details
Published in:Nature communications 2024-01, Vol.15 (1), p.628-628, Article 628
Main Authors: Yan, Xueru, Song, Tianqi, Li, Min, Wang, Zhi, Liu, Xinlei
Format: Article
Language:English
Subjects:
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639/638/298/923/1028
Benzimidazoles
Carbon dioxide
Carbon sequestration
Controllability
Fabrication
High pressure
Humanities and Social Sciences
Membranes
Motion pictures
multidisciplinary
NMR
Nuclear magnetic resonance
Polymer films
Polymerization
Polymers
Pores
Purification
Reluctance
Science
Science (multidisciplinary)
Spectrum analysis
Temperature
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Summary:Polymeric membranes with high permeance and remarkable selectivity for simultaneous H 2 purification and CO 2 capture under industry-relevant conditions are absent. Herein, sub-micro pores with precise molecular sieving capability are created in ultra-thin (13–30 nm) polymer membranes via controllable transformation of amine-linked polymer (ALP) films into benzimidazole-and-amine-linked polymer (BIALP) layers. The BIALP membranes exhibit stable unprecedented H 2 /CO 2 selectivity of 120 with a H 2 permeance of 315 GPU. Furthermore, high pressure (up to 11 bar) and thermal (up to 300 °C) resistance is delivered. This work provides a concept on designing porous polymeric membranes for precise molecular discrimination. The fabrication of polymeric membranes with high permeance and remarkable selectivity for simultaneous H 2 purification and CO 2 capture is challenging. Here, the authors design a polymer membrane with sub-micro pores via controlled transformation of amine-linked polymer films into benzimidazole- and amine-linked polymer layers.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-45007-6