Abstract Mass transfer coefficient and kinetic studies of CO2 sequestration into aqueous ammonia was carried out to reveal the extent of the effect of the CO2 and CO capture for the reactions which is an important characteristic in determining the efficiency of absorption. Experimental parameters for concentration of solution were 2 to 10 mol/dm3, process duration of 20 to 100 seconds and volume of solvent 40 to 200 millilitres with ambient temperature and atmospheric pressure as the conditions during the work. Data for kinetics of CO2 sequestered were obtained via numerical differential formula, absorption of CO2 into the ammonia solution conformed to the first-order reaction as the calculated values of the Hatta Number as shown were all above 100 and the regression coefficient, R2, value obtained from is greater than 0.9 with good linearity. An empirical volumetric mass transfer coefficient KGAV correlation for the system was proposed, KGAV was found to increase with an increase in concentration of solvent and volume of solvent.
Keyword: Kinetics, Mass transfer coefficient, CO2 sequestration, absorption, ammonia, concentration, volume, time, reaction pathways, environment.