Thermal degradation of aqueous amine/amino acid solutions in the presence and absence of CO 2

Abstract

The stability to thermal degradation of aqueous solutions of methyldiethanolamine (MDEA) and their mixtures with glycine (Gly), in the absence and the presence of CO 2 , was investigated by Gas chromatography-flame ionization detector (GC-FID). The results showed that the presence of CO 2 influenced significantly the degree of thermal degradation of these solutions. The investigated MDEA solutions were found less susceptible to thermal degradation in the absence of CO 2 . However, in the presence of CO 2 , the thermal degradation was more significant. The addition of glycine (Gly) to MDEA solution reduces the MDEA thermal degradation. It was concluded that MDEA + Gly amine/amino acid aqueous blend could be a potentially interesting absorbent for industrial CO 2 capture applications. � 2018 Institute of Physics Publishing. All rights reserved.