[3] Widely used in industry and academia, it has become a standard approach for describing complex mixtures.
[4][5][6][7] Since it was first proposed in 1990, SAFT has been used in a large number of molecular-based equation of state[8][9] models for describing the Helmholtz energy contribution due to association.
SAFT models the Helmholtz free energy contribution due to association, i.e. hydrogen bonding.
[2][11] The SAFT equation of state was developed using statistical mechanical methods (in particular the perturbation theory of Wertheim[12]) to describe the interactions between molecules in a system.
[1][13][14] Many different versions of the SAFT models have been proposed, but all use the same chain and association terms derived by Chapman et al.[2][13][15] One of the first SAFT papers (1990) titled "New reference equation of state for associating liquids" by Walter G. Chapman, Keith Gubbins, George Jackson, and Maciej Radosz,[2] was recognized in 2007 by Industrial and Engineering Chemistry Research as one of the most highly cited papers of the previous three decades.