Tuning Functionalized Ionic Liquids for CO₂ Capture.

Area of Science:

• Materials Science
• Environmental Science
• Chemical Engineering

Background:

• Rising atmospheric CO2 concentrations drive global climate change.
• Carbon capture, utilization, and storage (CCUS) is crucial for mitigating CO2 emissions.
• Functionalized ionic liquids (ILs) offer unique properties for efficient CO2 capture.

Purpose of the Study:

• To review the development of functionalized ILs for CO2 capture from 2012-2022.
• To categorize and summarize ILs based on functionalization (cation, anion, dual).
• To discuss future prospects and applications of ILs in CCUS.

Main Methods:

• Literature review focusing on functionalized ILs for CO2 capture.
• Classification of ILs by functionalization site (cation, anion, dual).
• Summary of synthesis, structures, and properties of relevant ILs.

Main Results:

• Detailed overview of cation-functionalized ILs for CO2 capture.
• Comprehensive analysis of anion-functionalized ILs for CO2 capture.
• Exploration of cation-anion dual-functionalized ILs and their CO2 capture capabilities.

Conclusions:

• Functionalized ILs are promising materials for advanced CCUS applications.
• The review provides a foundation for developing novel IL-based CO2 capture solvents.
• ILs show potential for capturing other gases like SO2, H2S, and NOx.