4. Conclusions
In the work it has been demonstrated that vapour–liquidequilibria
data for the aqueous amine and CO2 systems of MEA,
AMP, PZ and AMP-PZ mixtures can be modelled using a simple system
of chemical reactions with a simple activity model. This is in
contrast with the wide-spread and apparently accepted doctrine
which assumes complex and highly dimensional activity models
based around Pitzer equations, or similar, are required.
The principle of parsimony, Occam’s razor, states that the simplest
theory should be used that adequately describes the system
under investigation. The SIT model for the estimation of activity
coefficients is semi-empirical and thus not completely based on a