Kinetics of absorption of carbon dioxide into aqueous potassium salt of proline

► Kinetics of absorption of CO2 in aqueous potassium salt of proline. ► Interpretation of the reaction using zwitterionic mechanism. ► Determination of reaction parameters based on pseudo-first-order condition. ► Experimental results of N2O solubility in aqueous potassium salt of proline. ► Higher second-order rate constants compared to alkanolamines and some other salt of amino acids.