Kinetics of the Reaction of Carbon Dioxide with Aqueous Solutions of 2-((2-Aminoethyl)amino)ethanol

In view of increased requirements on absorption rates and loading capacity for carbon dioxide (CO 2 ) absorption solvents, more research is directed toward alkanolamines having more than one amino group. In the present work, AEEA {2-((2-aminoethyl)amino)ethanol}, a diamine containing primary and secondary amino groups, is used to study the CO 2 absorption kinetics. The reaction kinetics between CO 2 and aqueous solutions of AEEA were measured over a range of temperatures from 32 to 49 °C with the concentrations of AEEA ranging between 1.19 and 3.46 kmol m -3 using a string of discs contactor. All kinetic experiments were interpreted using the single-step−termolecular mechanism approach as proposed by Crooks and Donnellan ( J. Chem. Soc., Perkin Trans. 2 1989, 331) and reviewed by da Silva and Svendsen ( Ind. Eng. Chem. Res. 2004, 43, 3413).