Modelling and understanding of the vapour-liquid and liquid-liquid interfacial properties for the binary mixture of n-heptane and perfluoro-n-hexane

► We study the vapour-liquid and liquid-liquid interface of the n-heptane and perfluoro-n-hexane mixture. ► An equation of state of the statistical associating fluid theory (SAFT) family is used to describe the phase behaviour of the mixture. ► Molecular-dynamics simulations are also used to calculate the interfacial tension of the mixture. ► The theory and simulation data are in good agreement with the experimental data for the fluid phase equilibria.