Sub-micro porous thin polymer membranes for discriminating H 2 and CO 2 .

Authors :: Yan X
Song T
Li M
Wang Z
Liu X
Source :: Nature communications [Nat Commun] 2024 Jan 20; Vol. 15 (1), pp. 628. Date of Electronic Publication: 2024 Jan 20.
Publication Year :: 2024
Abstract: Polymeric membranes with high permeance and remarkable selectivity for simultaneous H <subscript>2</subscript> purification and CO <subscript>2</subscript> 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 <subscript>2</subscript> /CO <subscript>2</subscript> selectivity of 120 with a H <subscript>2</subscript> 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.<br /> (© 2024. The Author(s).)