%0 Journal Article %A LI Chunxi %A WANG Wenchuan %T A Surface Tension Model for Liquid Mixtures Based on NRTL Equation %D 2001 %R %J Chinese Journal of Chemical Engineering %P 45-50 %V 9 %N 1 %X A new equation for predicting surface tension is proposed based on the thermodynamic
definition of surface tension and the expression of the Gibbs free energy of the system.
Using the NRTL equation to represent the excess Gibbs free energy, a two-parameter surface
tension equation is derived. The feasibility of the new equation has been tested in terms
of 124 binary and 16 multicomponent systems(13-ternary and 3-quaternary) with absolute
relative deviations of 0.59% and 1.55% respectively. This model is also predictive for the
temperature dependence of surface tension of liquid mixtures. It is shown that, with good
accuracy, this equation is simple and reliable for practical use.
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