DEEP EUTECTIC SOLVENTS FOR CO2 CAPTURE IN POST-COMBUSTION PROCESSES

CO2 emissions represent an actual problem for the environment. Additionally, the new demands for all chemical and physical processes request to be more eco-friendly. In this work, deep eutectic solvents (DESs), a relatively new class of solvents, were used for CO2 capture and desorption. DESs are more environmentally friendly than classical solvents. Two choline chloride-based DES - ethaline (ChCl:EG, 1:2 molar ratio) and reline (ChCl:U, 1:2 molar ratio) were prepared and characterized before studying their CO2 absorption - desorption capacity. The formation of eutectics was confirmed by FT-IR analysis and DESs were characterized in terms of pH, density, viscosity, refractive index, and electrical conductivity. The tests showed that ethaline had better CO2 absorption and desorption capacity than reline, which could be explained by several parameters.