KINETICS OF ABSORPTION OF CO2 INTO AQUEOUS-SOLUTIONS OF 2-AMINO-2-METHYL-1-PROPANOL

The mechanism and kinetics of the reaction between CO2 and aqueous solution of sterically hindered amine, 2-amino-2-methyl-1-propanol (AMP), were investigated at 294-318 K by gas absorption studies using a wetted wall column. The reaction was found to be first order with respect to both CO2 and AMP. The values of the second order rate constant were found to be 439, 687, 1179 and 1650 m(3)/(kmols) at 294, 301.5, 311.5 and 318 K, respectively, in the amine concentration range 0.5-2.0 kmol/m(3). These results agree closely with those of Alper (1990, Ind. Engng Chem. Res. 29, 1725-1728), who adopted a completely different methodology, the stopped flow technique, for investigating the kinetics of CO2-AMP.