Thermal stability and corrosion studies of amines for combined acid gas removal and hydrate control for subsea gas treatment systems

In order to meet future challenges in subsea production and processing compact systems for hydrate control and selective H 2 S/CO 2 removal can be used. The development of an amine-based regenerative process whereby both water and H 2 S/CO 2 are removed may involve corrosion problems. In this study, the amine stability and corrosion tendencies of 30 wt% aqueous solutions of 2-ethanolamine and N-Methydiethanolamine under high temperatures in presence of MEG/TEG, have been experimentally studied. The results show that the presence of MEG/TEG (in the absence of water) influence both the amine degradation and corrosion. Furthermore, the results indicate that the influence of MEG or TEG is dependent on the amine used.