Gibbs Energy and Helmholtz Energy: Liquids, Solutions and Vapours
CHAPTER 13: The Statistical Associating Fluid Theory
Published:08 Sep 2021
The Statistical Associating Fluid Theory (SAFT) has had great success in the accurate description of the thermodynamic properties of fluids. It is based on a perturbation expansion of the Helmholtz free energy, including several terms that account for the different interactions that appear in real systems. In this chapter, the main SAFT versions are summarized, explaining the assumptions and approximations that are involved in each formulation. With the purpose of showing its capabilities and giving an application example, the Variable Range Mie SAFT (SAFT VR Mie) version is presented in more detail. To illustrate the ability of this approximation to describe correctly the behavior of complex fluids, calculations of the thermodynamic properties of 1-alkanol series are presented and compared with available experimental data.