Ionic-Liquid-Based CO₂ Capture Systems: Structure, Interaction and Process

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Ionic liquids (ILs) are explored for CO2 separation due to their tunable structure, CO2 affinity, and nonvolatility.
• Significant interest exists from both industry and academia in utilizing ILs for CO2 capture.

Purpose of the Study:

• To provide a comprehensive overview of recent advancements in IL-based materials for CO2 capture and separation.
• To cover pure ILs, IL-based solvents, and IL-based membranes from molecular to engineering perspectives.

Main Methods:

• Review of recent literature on ILs for CO2 separation.
• Analysis of the effects of IL structure (anions, cations, functional groups) on CO2 solubility and selectivity.
• Integration of molecular simulation and experimental characterization to explain separation mechanisms.
• Evaluation of transport properties and process design for industrialization.

Main Results:

• Detailed review of functionalized ILs, IL-based solvents, and IL-based membranes.
• Explanation of CO2 separation mechanisms using combined simulation and experimental data.
• Highlighting of transport properties and process design for IL-based CO2 capture.

Conclusions:

• IL-based materials show promise for CO2 capture and separation.
• Future research should address challenges for commercialization and industrial application.
• Perspectives on the future development and implementation of IL-based CO2 separation technologies are discussed.