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

Abstract

In view of increased requirements on absorption rates and loading capacity for carbon dioxide (CO2) 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 CO2 absorption kinetics. The reaction kinetics between CO2 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).