Random organic framework membranes with hierarchical channels for H2 separation

Liping Luan, Puxin Shi, Zhi Wang, Freek Kapteijn, Xinlei Liu*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


Novel membrane materials for H2 separation are wanted. How to overcome the “trade-off” between membrane permeability and selectivity is a tough challenge. Here we report new random organic framework membranes with benzimidazole and imine linkages to form hierarchical channels. Both high H2-selective and fast H2 transport pathways are created. The preparation parameters are thoroughly studied and the membrane structures are well characterized by SEM, AFM, NMR, XPS, gas sorption, etc. Effect of feed conditions on membrane performance, such as composition, pressure and temperature, is investigated. The membrane performance transcends the upper bounds of H2/CO2, H2/N2 and H2/CH4 with excellent stability.

Original languageEnglish
Article number122420
Number of pages8
JournalJournal of Membrane Science
Publication statusPublished - 2024

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


This work was financially supported by the National Key Research and Development Program ( 2021YFB3801200 ), the National Natural Science Foundation of China ( 22008171 ), the Inner Mongolia Autonomous Region Unveiling Project ( 2022JBGS0027 ), and the Independent Innovation Funding of Tianjin University (No. 2023XJD-0067 ). The authors were grateful to Dr. D. Osadchii from TUDelft for his valuable discussion.


  • Benzimidazole and imine linked polymer
  • H separation
  • Hierarchical channels
  • Random organic framework membranes


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