Investigation of Effects of the Amine Solutions Composition on Carbon Dioxide Absorption Rate and Capacity

Abstract

Increasing importance of CO2 emission reduction cause necessity to find the most effective separation method of this gas from flue gases. The most promising seems to be a chemical absorption in aqueous solutions of alkanolamines. In order to reduce high energy consumption of this process, it is necessary to develop new solutions which will be characterized by the best absorption rate and capacity e.g. through the appropriate composition of amine blends. Experiments were carried out on the solutions containing primary amines, tertiary amines, sterically amines, cyclic amines and organic liquids. The experiments included CO2 absorption equilibriums and rate determination for temperature range 20-60 deg. C. The results showed a beneficial effect of using blends containing primary amines and sterically hindered amines with organic liquids on both the absorption rate and the absorption capacity.