Interfacial tensions of fluid mixtures with polar and associating components

Interfacial tensions of systems comprising water, carbon dioxide and diluent gases at high pressures: Experimental measurements and modelling with SAFT-VR Mie and square-gradient theory

“…Reliable measurements of the liquid and vapour phase densities under the conditions of interest are not available. As a measure of the possible uncertainty of ∆ρ, we compare the density difference calculated using the PR-NRTL model with the difference between the densities of the pure components at the same temperature and pressure [21][22][23]. The maximum absolute relative difference of ∆ρ was found to be 0.9 %, and average absolute relative difference to be 0.3 %.…”

“…The success of the SGT is apparent from the volume of literature covering its application to a large range of fluids, utilizing a similar wide range of underlying fluid theories. The theory has seen applications to, among other areas: liquid-liquid systems [16], polymers [19], associating systems [20][21][22], polar systems [22], (alkane + CO 2 ) systems [23] and (water + gas) systems [24][25][26].…”

Interfacial properties of selected binary mixtures containing n-alkanes

“…In principle, the Helmholtz energy density can be described from any equation of state (EoS), with the consequence that a single EoS can be used to predict both phase equilibrium and interfacial properties. Previous works demonstrated that the combination of the SGT with cubic type EoS [6][7][8][20][21][22][23][24][25][26][27] as well as molecular based EoS [9,[28][29][30][31][32][33] models is promising for correlating and/or predicting interfacial properties in some pure hydrocarbon and hydrocarbon mixtures in a wide range of temperatures, pressures and concentrations. Both the SGT and available EoS models require at some stage experimental data for pure component parameter fitting.…”

Simultaneous prediction of interfacial tension and phase equilibria in binary mixtures

“…For example, good results have been reported for hydrocarbon + alkanol mixtures from the APACT EOS by Cornelisse [10,14] and from the SAFT model by Kahl and Enders [15]. An alternative approach is to consider cubic EOS of the van der Waals type with improved mixing rules.…”