Absorption of Carbon Dioxide from Flue Gas using Blended Amine Solutions

Abstract

Abstract Employing systematic experiments and comparing the CO 2 absorption amount, absorption rate and CO 2 loading of various amines and their mixtures, the optimal formula of blended amine solution is investigated. The results demonstrate the absorption characteristics of diethylenetriamine are the best, followed by monoethanolamine and methyldiethanolamine, while diethanolamine has no competitive advantage, neither in terms of the absorption amount and rate nor loading of CO 2 . The amine concentration has a significant influence on CO 2 absorption, followed by formula and ratio, while the temperature and pressure affect little. The optimal formula of blended amine solution with the highest rate constant and activation energy of CO 2 absorption was determined.