Process Formation TELTEK
Theoretical evaluation of the probability to form and emit harmful components from the aqueous amine solution MEA, MDEA, AMP, PZ and some of their mixtures A literature report Siw B. Fredriksen Norner Innovation, Stathelle, Norway. Klaus Jens Telemark University College and Tel-Tek Porsgrunn, Norway Dag Eimer Tel-Tek and Telemark University College Porsgrunn, Norway H&E TQP Amine Tel-Tek CCM project, frame Kjølnes ring 30, Porsgrunn agreement 257430116 Norway contract 257430117 Tel-Tek project 2210040 Report 22100-2 Norner Project no 2212042 October 2010 Executive Summary The present report represents a systematic survey of amine degradation products from the amines MEA, MDEA, AMP and PZ, reported in the literature before August 1, 2010. Potential degradation products have been reported to be (specific compounds or classes of compounds) one or more of the following: NH3 , primary amines / alkanolamines, secondary amines / alkanolamines, tertiary amines / alkanolamines, aldehydes (formaldehyde, acetaldehyde), carboxylates, amides, piperazines, piperazinones, oxazolidones, nitrosamine, imidazolidinones, N, N-disubstituted urea, nitramines. The main focus has been on oxidative degradation products as these are expected to cause the most harmful degradation products or precursors for such if emitted. The degradation products with the highest probability of being present in the vapour phase have been suggested. Nitrite and nitrate have been reported as MEA degradation products. Secondary amines may form nitrosamines with nitrite in basic conditions in the presence of formaldehyde, and unidentified nitrosamine(s) have been observed in spent flue gas solvent. The possibility for quaternary amines as nitrosamine precursors might be considered. Nitramine formation has to be considered but no report relating to nitramine formation in aqueous MEA solution under flue gas capture conditions was found.
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