A DATA-BASE STANDARD FOR THE EVALUATION OF VAPOR-LIQUID-EQUILIBRIUM MODELS

In order to evaluate vapor-liquid-equilibria models it is necessary to have a reliable data set. While there are many compendiums of VLE data, in many cases they are too large to manage efficiently, too limited in scope, of unknown reliability, or do not allow a classification of the systems so that one can predict how other systems may behave. A standard low pressure VLE data base which avoids these problems has been developed. A total of 104 binary systems has been selected and divided into groups according to the polarity of the components and whether they form ideal or nonideal systems. Each data set has been tested carefully for thermodynamic consistency. As far as possible the data are evenly distributed among the systems and over the entire concentration ranges. This data set is recommended as a standard for testing new VLE models. © 1990.