In this present work, the absorption kinetics of CO2 into aqueous 1-(2-Hydroxyethyl) piperidine (1-(2-HE)PP) solutions with respect to observed pseudo-first-order rate constant (k(0)) and second order reaction rate constant (k(2)), were determined using the stopped-flow apparatus within the 1-(2-HE)PP concentration range of 0.20-1.00 kmol/m(3) and a temperature range of 293-313 K The values of k(0) were then represented using the correlation based on the base-catalyzed hydration mechanism. The results show that the correlated values of k(0) matched well with the experimental values with an acceptable AAD of 8.3%, which indicates that the base-catalyzed hydration mechanism can satisfactorily describe the experimental kinetics data of thel-(2-HE)PP reaction with CO2. In order to comprehensively understand the kinetics, the ion speciation plots of 1-(2-HE)PP-H2O-CO2 system were developed using the pH method. In addition, the Bronsted plots between k(2) (obtained from stopped-flow apparatus) and pK(a) (obtained from experimental measurement) for 1-(2-HE)PP were developed, and then used to predict k(2) using the values of pK(a).