Abstract
Carbon dioxide is one of the key contributors in green house gases (GHG), and its emission is increasing exponentially. Amine technology for the capture of carbon dioxide has certain drawbacks including cost, energy, etc. Other methods such as membrane, cryogenic, biological are also of interest but not technically or economically feasible at large or industrial scales. In view of this, ionic liquids (ILs) are one of the best alternatives for the conventional and other technologies. In recent years, a lot of studies revealed that it can be effectively used for the capture of carbon dioxide. In the present chapter, mainly various key features of different types of ILs have been discussed. The various sections considering source and emission of CO2, carbon dioxide capture methods, brief on ILs, carbon dioxide capture by ILs, various ways to use ILs for CO2 capture, biodegradation, toxicity, and discussion. ILs for CO2 that comprise conventional, functionalized, membrane supported polymer, solid supported phase, mixture with organic solvents, etc., have also been presented.
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