Text S5. Solubility considerations for the salts of amines
One last potential complication in our thermodynamic simulations is the possible formation of the solid aminium nitrate salts. Only a handful of the nitrates of alkylamines (such as MA, DMA, TMA), AN and MEA were studied for their solubility properties. The general trend is that the nitrate salts of alkylamines and alcohol amines are highly soluble in water, which consequentially makes no impact on the thermodynamic modeling results.
In the case of AN, its nitrate salt has low solubility. Additional simulation using E-AIM while specifying the solubility of AN nitrate showed that no solid of AN nitrate may form under our simulation conditions. It is therefore reasonable to assume that the water solubility of the aminium nitrate salts had no impact on ourTc results.