Eksperimentell undersøkelse av atmosfærisk amindegradering

From the amine-based ACC CO₂ capture process, small amounts of amines and degradation products will accompany the purified exhaust gas and be released into the air. Amines can degrade to nitrosamines and nitramines both in the process and in the atmosphere. Emissions of these substances can be harmful above a certain concentration since some of the components in these chemical groups are harmful to health. It is therefore important to know the concentrations of these chemicals in air and water. The emissions from the capture process are modeled using dispersion models that include the conversion of amine to nitrosamines and nitramines in the atmosphere.

For two amines in the ACC’s portfolio of amine mixtures, there were only theoretical values. In project 225764, these two amines and an amine mixture were tested under atmospheric conditions in the European Photochemical Reactor, EUPHORE, in Valencia. Experimental values ​​for nitrosamine and nitramine yield and reaction constants for the reaction between the amines and OH were found. These results will be used to model emissions to air and calculate nitrosamine and nitramine concentrations.