Recent advances and challenges in ionic materials for post-combustion carbon capture

CO2 Post-combustion Capture: A Critical Review of Current Technologies and Future Directions

“…65 Ionic liquids (ILs), which are composed entirely of ions, are being explored as innovative solvents for CO 2 capture due to their environmentally friendly properties. 66 ILs are often referred to as "green solvents" due to these environmentally friendly properties: i.e., low melting point, allowing them to remain liquid at or near room temperature; 67 low volatility, which reduces the risk of evaporation and solvent loss during the absorption process, contributing to safer and more sustainable operations; 67 good thermal stability, enabling them to withstand the high temperatures required during CO 2 desorption and solvent regeneration phases. 67 These properties collectively make ionic liquids a compelling choice for enhancing the efficiency and environmental performance of post-combustion absorption-based CO 2 capture technologies.…”

“…Physically absorbed ILs utilize their anionic and cationic structures to absorb and dissolve CO 2 through non-chemical interactions, such as hydrogen bonds and van der Waals forces, 66 that are relatively weak. This results in lower energy requirements for regeneration but also leads to a modest CO 2 absorption rate, capacity, and selectivity.…”