Journal
SEPARATION AND PURIFICATION REVIEWS
Volume 51, Issue 2, Pages 261-280Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15422119.2021.1920428
Keywords
Absorption; contactor; gas separation; membrane preparation; solvent
Funding
- Institut Teknologi Bandung [Program Penelitian, Pengabdian kepada Masyarakat dan Inovasi ITB]
- Indonesian Ministry of Education and Culture [World Class University (WCU) Progam]
- Indonesian Ministry of Research and Technology/National Agency for Research and Innovation
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Ionic liquids have emerged as promising candidates for carbon dioxide capture, replacing amine-based solvents due to their low vapor pressure, high stability, and tunable structure and properties. Combining functionalized ILs with membrane processes has opened up a new horizon in CO2 capture technology. The review comprehensively summarizes the latest developments in the application of ionic liquid membranes for CO2 capture.
Carbon dioxide capture from industrial gases (i.e., flue gases and natural gas) is a crucial process for reducing the environmental impacts of acid gas emissions. However, carbon dioxide capture that is generally performed by amine-based solvent faces operational problems due to the properties of the solvent. Recently, ionic liquids (ILs) have emerged as promising candidates for replacing the amine-based solvent due to their low vapor pressure (near-zero), high stability, as well as tunable structure and properties. The functionalized ILs are considered superior in terms of their ease of regeneration as well as high absorption capacity and selectivity toward CO2. Combining the functionalized ILs with membrane processes has opened up a new horizon in CO2 capture technology. This review comprehensively summarizes the latest developments in the application of ionic liquid membranes (ILMs) for CO2 capture, including supported ILMs (SILMs), poly-ILMs (PILMs), polymer-IL composite membranes, mixed-matrix-membranes, with special attention to ILM contactors. The absorption mechanisms of CO2 in the ILs are pictured and discussed.
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