Reversible absorption of CO2 into aqueous amine solutions is the most advanced technology for Post Combustion Capture of CO2 from waste gas streams. The complete quantitative understanding of all aspects of the chemical reactions can form the basis for the optimisation of an absorber plant as well as for the development of new absorber solvents.CO2 reacts in two different ways with amines, either as an acid (via carbonic acid) reacting with the amine as a base or it reacts directly with the amine to form the carbamate. All reactions are reversible, some are fast, they all occur parallel, thus their detailed investigation is not trivial.We have developed the technology based on stopped-flow with indicators and 1H-NMR for the analysis of such complex systems. We will report the results of our investigations and also their usage for rational interpretation of existing and predictions of novel solvents.

Fate of carbon dioxide in aqueous amine solutions: The chemistry of post combustion capture

243rd National Meeting (2012)

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