Statistical Associating Fluid Theory:  A Successful Model for the Calculation of Thermodynamic and Phase Equilibrium Properties of Complex Fluid Mixtures

Abstract

Statistical associating fluid theory (SAFT) is a powerful model for thermodynamic property and phase equilibrium calculations for fluid mixtures. In this paper, the model development, modifications, and generalizations proposed over the past decade are reviewed. Emphasis is given to developments resulting in equations of state applicable to real fluids. In addition, theoretical models are reviewed. Applications are discussed, and representative calculations are presented with emphasis on aqueous systems and polymers. Despite its wide acceptance, SAFT has several limitations that are discussed here.

High-pressure densities and interfacial tensions of binary systems containing carbon dioxide+n-alkanes: (n-Dodecane, n-tridecane, n-tetradecane)

“…The reader is referred to reviews on the topic for further discussions [71,72,73,74,75,76]. Here we employ the SAFT version proposed by Lafitte et al [69], the basis of the third-generation SAFT-γ group contribution EoS [77].…”

Modeling the vapor–liquid equilibrium and association of nitrogen dioxide/dinitrogen tetroxide and its mixtures with carbon dioxide

“…Since the SAFT equation and its modifications have been extensively revised [19] (2) where a and a id are the total Helmholtz energy density and the ideal gas Helmholtz energy density at the same temperature and density, respectively. a ref is the contribution to the Helmholtz energy of the spheres term composing the molecules; a chain , the chain contribution term and a assoc , the association term, both come from Wertheim's theory.…”

“…SAFT was envisioned as an application of Wertheim's theory of association [12][13][14] through the use of a first order thermodynamic perturbation theory (TPT) to formulate a physically based EoS [11,[15][16][17] The ambition of making SAFT an accurate equation for engineering purposes has promoted the development of different versions that tried to overcome the limitations of the original one [18,19].…”

A Survey of Equations of State for Polymers

“…Four comprehensive reviews of the development and application of the various types of SAFT have appeared recently [1], [2], [105], [109].…”