An Overview of Conventional Techniques and Recent Advancements in CO2 Capture Technologies

CO 2 Capture and Utilization (CCU) is a promising technique for reducing global warming. Conventional methods include absorption and adsorption, chemical looping combustion and cryogenic distillation, hydrate-based separation and membrane separation have been used for CO 2 separation, but they have certain limitations like high energy intensive, solvent degradation, solvent loss, corrosive nature of the solvents and toxicity of solvents. Novel materials and techniques are always being developed in order to achieve greater optimization. Ionic Liquids (ILs) have demonstrated great potential for cost-effective CO 2 separation. Similarly, Supported Ionic Liquid Membranes (SILMs) have also shown effective CO 2 separation performance. This review offers the detailed mechanism, advantages and disadvantages and comparison of various conventional methods used for CO 2 capture. In addition, different ionic liquids used for CO 2 separation have also been discussed in detail. Lastly, Various challenges, and future recommendations in SILMs are identified and explained.