Progress, Challenges, and Opportunities in Ionic Liquid–Modified Polymer Membranes for CO2 Separation
Julia A. Piotrowska, Michael Harasek, Katharina Bica-Schröder
TL;DR
This review explores how ionic liquid-modified polymer membranes can improve CO2 separation and conversion, addressing challenges like selectivity and stability.
Contribution
The paper provides a comprehensive review of recent advances and challenges in using ionic liquids in polymer membranes for CO2 capture and conversion.
Findings
Ionic liquids enhance CO2 solubility and membrane performance.
IL-functionalized membranes face challenges like leaching and thermal limitations.
Integrated systems for CO2 capture and catalytic conversion are emerging.
Abstract
Driven by the critical challenge of mitigating anthropogenic CO2 emissions, the field of carbon capture and utilization (CCU) has undergone rapid development. Among these, membrane-based CO2 separation stands out for its energy efficiency and ease of industrial implementation. However, challenges such as the selectivity-permeability trade-off and plasticization limit its effectiveness. Functionalizing membranes with ionic liquids (ILs) has emerged as a promising strategy that takes advantage of the ILs’ high CO2 solubility, stability, and tunability to enhance separation performance. Beyond CO2 capture, ILs also serve as key promoters in CO2 conversion by facilitating various reactions. This Review summarizes recent progress in IL-functionalized polymer membranes, highlighting advances in polymerized ILs, mixed matrix membranes, and hollow fiber configurations. Representative studies…
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Taxonomy
TopicsMembrane Separation and Gas Transport · Ionic liquids properties and applications · Carbon Dioxide Capture Technologies