Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

The operational and economic constraints suffered by amine solvents for CO2 removal have motivated the research on an alternative solvent with better performance cost-effectiveness. Amino acid salt (AAS) has been identified as interesting green solvent, to commercial solvents. present work evaluated physicochemical CO2-solubility properties of potassium L-cysteine (K-CYS), a naturally occurring amino-acid-based from natural gas. Its properties, including density, viscosity, refractive index, were measured at different temperatures ranging between 298.15 333.15 K concentration range 5 30 wt.%. Based experiment, all found decrease increasing temperature increase concentration. experiments also demonstrated significant reduction loading 2.4190 1.1802 mol CO2/mol K-CYS 10 wt% 313.15 20 bar (g).