Recent Advances in Poly(ionic liquids) Membranes for CO2 Separation

Manman Zhang, Raphael Semiat, Xuezhong He

Research output: Contribution to journalReview articlepeer-review

12 Scopus citations


Developing energy-efficient and environmentally friendly technologies are particularly crucial for CO2 separations from flue gas, natural gas, and syngas. Membranes made from functionalized poly(ionic liquids) (PILs) have recently attracted great attention for gas separations, but few systematic reviews from the material preparation to their applications have been reported. Therefore, the latest progress in the preparation of different types of PIL-based membranes such as pure PIL membranes, PIL copolymer membranes, PIL/IL composite membranes, and PIL-based mixed matrix membranes (MMMs) have been critically discussed in this work. It was found that PIL/IL composite membranes and MMMs may have a better opportunity for industrial CO2 separations if gas permeability can be further improved. In the end, the perspective for the development of more efficient membranes based on the understanding of the structure-property relationship of PILs with separation performance was also proposed. Moreover, the separation performance of PIL-based membranes should be further evaluated in terms of techno-economic feasibility and environmental impact analysis.
Original languageAmerican English
Article number121784
JournalSeparation and Purification Technology
StatePublished - 25 Jul 2022


  • Poly(ionic liquids)
  • CO2 separation
  • Permeability
  • Composite membranes
  • Flue gas


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