Sub-micro porous thin polymer membranes for discriminating H<sub>2</sub> and CO<sub>2</sub>.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38245541.
- Also identified by DOI 10.1038/s41467-024-45007-6 and PMC identifier 10799960.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Polymeric membranes with high permeance and remarkable selectivity for simultaneous H<sub>2</sub> purification and CO<sub>2</sub> 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<sub>2</sub>/CO<sub>2</sub> selectivity of 120 with a H<sub>2</sub> 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.