Kinetics of CO2 Absorption in Aqueous Sodium Glycinate Solutions

The physical solubility and diffusivity of N 2 O and CO 2 in aqueous sodium glycinate (SG) solutions of various concentrations (1.0−3.5 kmol/m 3 ) and temperatures (303.15−323.15 K) were reported. The kinetics of the reaction between CO 2 and SG has been studied using absorption data measured by a wetted-wall column apparatus at various temperatures and concentrations. The second-order rate constant of CO 2 with SG was determined to be k 2 (m 3 kmol -1 s -1 ) = 1.95 × 10 13 exp(−7670/ T ), where T is the absolute temperature (given in Kelvin). The activation energy for the reaction of CO 2 with SG was calculated to be 63.8 kJ/mol.