Phase equilibria in fluid mixtures

Abstract

-Phase diagrams for binary fluid mixtures are reviewed with respect to experimental methods used for their study; the kinds of phase diagram obtained in practice, especially those including one or more of azeotropy, the coexistence of three fluid phases, and the coexistence of two fluid phases ("gas-gas immiscibility") at temperatures above the critical temperature of either pure component; and the extent to which modern theoretical treatments can be used to predict what actually happens at different pressures, temperatures, and compositions.

Application of the generalised SAFT-VR approach for long-ranged square-well potentials to model the phase behaviour of real fluids

“…The homologous series of the n-alkanes is also of general interest given their importance as components of crude oil, as oligomers of polyethylene, and as ideal chain-like molecules with which to test molecular models and theories. In addition, mixtures of n-alkanes and polyethylene molecules exhibit a variety of interesting phase behaviours [53][54][55] . Here we revisit the models and parameter sets for four of the smaller n-alkanes: ethane, propane, n-butane and n-octane.…”

An analytical perturbed equation of state for hard chain fluids: Application to n-alkanes and n-perfluoroalkanes

“…The perturbed hard chain theory (PHCT), proposed by Prausnitz et al, is one of the first equations to describe chain molecules [1]. The PHCT has been successfully used to calculate vapour-liquid equilibria [1], Henry's constants [2], the second virial coefficient [2], and so on.…”

“…The PHCT has been successfully used to calculate vapour-liquid equilibria [1], Henry's constants [2], the second virial coefficient [2], and so on. The perturbed hard chain theory was simplified by Kim et al [3] and used to predict the thermodynamic properties of n-alkanes including the vapour pressure and saturated liquid densities.…”

Phase Equilibria in Fluid Mixtures at High Pressures

“…There are a number of reviews which deal with most topics to which the reader is referred (ref. [6][7][8][9][10][11][12]. BINARY…”