Phase change amino acid salt separates into CO 2 -rich and CO 2 -lean phases upon interacting with CO 2

•Innovative phase change amino acid salt solvent is developed for CO2 capture.•Amino acid salt solution is turned into a CO2-rich phase and a CO2-lean phase upon simple bubbling with CO2.•The developed solvent captures the most CO2 (∼90%) in the CO2-rich phase.•NMR spectroscopy was used to identify the species in the solution.