N-Ethylethanolamine (EEA) and N, N-diethylethanolamine (DEEA) represent promising alkanolamines for CO2 removal from gaseous streams, as they can be prepared from renewable resources. In this work, the reaction rate constant for the reaction between CO2 and EEA and the liquid-side mass transfer coefficient were determined from the absorption rate measurements in a blend comprising DEEA, EEA and H2O. A stirred-cell reactor was applied for the absorption studies, whereas a zwitterion mechanism for EEA and a base-catalyzed hydration mechanism for DEEA were used to describe the reaction kinetics.