A series of experiments on reaction kinetics was conducted at different temperatures (298-308k) the initial DEEA concentration in solution was kept constant (2 kmol/m3) where the pz concentration was varied (0.1-0.5kmol/m3)in each experiment the reactor was charged with 0.4 dm3 of the fresh alkanolamine solution the gas inside the reactor was then purged with nitrogen to ensure an inert atmosphere thereafter nitrogen was released through the gas outlet port all the lines were closed and the reactorcontent attained the desired temperature co2 form the gas cylinder was then charged inside the reactor with this being considered as the starting point for the reaction the reactor content was stirred at the desired speed of agitation the decrease in system pressure due to reaction was monitored by the pressure transducer and the ''pco2 vs.t'' data were recorded during 30 s using the data acquisition system these data were plotted for the time interval between t=5 s and t=25 s and fitted to a third degree polynomial using the least-squares regression the absorption rates were calculated from the values of the slop-dPco2/dt this measurement method based on the fall-in-pressure tech