Implementation of the Deep Eutectic Solvent, Choline Urea Chloride (1:2), to Evaluate the Sustainability of its Application During CO2 Capture

Green chemistry aims to create chemical products and processes that decrease or eradicate the need for harmful substances. By using green solvents like Deep Eutectic Solvents (DES) it is feasible to devise new processes or modify current that adhere to the principles of circular economy and green chemistry. In this work is presented the potential use of choline urea chloride (1:2) as a solvent; taking the post-combustion capture of carbon dioxide (CO ₂) as a case study. The results demonstrated that the methodology proposed allows the thermodynamic modeling of DES, obtaining a prediction of data very similar to the experimental trends previously reported. In addition, the use of DES in CO ₂ capture allowed a 13.97% reduction in environmental impact and required 25.38% less energy than the traditional process based on amine absorption. This led to a reduction in global cost by 32.11% and 19.64% for equipment and services, respectively, and a 21.13% lower cost of operation. Graphical Abstract: [Figure not available: see fulltext.].