Thermal Degradation of Linear Amines for CO2 Capture

This paper investigates the thermal degradation of eight linear amines loaded with CO2 and H+. The degradation rate of these amines tends to decrease with chain length. Hexamethylenediamine, the diamine with the longest chain, was found to be the most thermally resistant of the eight amines under CO2 loading. Putrescine was the only amine under acid loading that was not thermally stable, suggesting that the reaction mechanism is initiated by H+. Ethylenediamine, 2-(2-aminoethoxy)ethanamine, hexamethylenediamine, and Diglycolamine® reach a thermodynamic equilibrium with their degradation products. Ethylenediamine was also found to be the most corrosive amine tested.