NMR Study on the Oxidative Degradation of MEA in Presence of Fe2+

Qualitative and quantitative NMR experiments were performed on 5 M aqueous solutions of monoethanolamine (MEA) loaded with CO2 (α = 0.4) and in presence of 1 mM FeSO4 x 7H2O as a catalyst. The main degradation products were identified and quantified by 1D and 2D NMR Spectroscopy as: N-(2-hydroxyethyl) imidazole (HEI), 2-oxazolidone (OZD), N-(2-hydroxyethyl) formamide (HEF). There are also some other signals not quantified yet because of the low intensity. The NMR results were compared with GC/LC-MS results of the same solution.