The carbon dioxide absorption process by aqueous mixtures of 1-amine-2-propanol (MIPA) with triethanolamine (TEA) in a bubble column reactor was analyzed under different points of view. The influence of the gas flow rate, time, and mixture composition on the hydrodynamic parameters, reaction mechanism, and mass transfer of carbon dioxide removal was studied. These studies searched possible synergic effects in these important items, which could modify the behavior of individual amines and improve the overall absorption rate. Several changes in the relative importance of different reactions involved in the chemical absorption were checked using nuclear magnetic resonance (NMR) techniques. An enhancement in the mass-transfer coefficient was also observed for these amine mixtures.