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

Xueru Yan, Tianqi Song, Min Li, Zhi Wang and Xinlei Liu ()
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Xueru Yan: Tianjin University
Tianqi Song: Xi’an Jiaotong University
Min Li: Tianjin University
Zhi Wang: Tianjin University
Xinlei Liu: Tianjin University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Polymeric membranes with high permeance and remarkable selectivity for simultaneous H2 purification and CO2 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 H2/CO2 selectivity of 120 with a H2 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.

Date: 2024
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DOI: 10.1038/s41467-024-45007-6

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