Association model of fluids. Phase equilibria in sulphur dioxide mixtures

The vapor-liquid and liquid-liquid equilibria of binary mixtures formed by sulphur dioxide with organic components are reproduced well using a new associated-solution model whose association and solvation constants are defined in terms of the modified segment fractions of chemical species. The model shows a good performance in predicting ternary vapor-liquid and liquid-liquid equilibria of sulphur dioxide mixtures from only binary parameters.