Prediction of Surface\nTension Using COSMO-RS

We developed a method for predicting surface tension\nusing COSMO-RS.\nIt is based on an empirical correction to the COSMO-RS-based method\nfor predicting liquid–liquid interfacial tension. The method\ndeveloped here allows for the predictions of surface tension and interfacial\ntension of gas–liquid systems from low to high pressures and\ngives good agreement with experiments for the surface tension of more\nthan 50 single component liquids and 12 binary mixtures, including\nthree surfactant solutions (one cationic, one anionic, and one nonionic).\nThe mean absolute deviation for the single component surface tension\npredictions was <4 mN/m, and the average relative deviation was\n11%. The maximum deviations were about −9 and +9 mN/m, which\ncorrespond to a maximum relative deviation of 28%. The temperature\ndependence of surface tension for several polar and nonpolar compounds\nwas also well reproduced as was the general behavior of surfactants.