A classification of phase diagrams of ternary fluid systems

Abstract

Phase diagrams and critical states of ternary fluids mixtures are calculated from the van der Waals equation of state with standard 1-fluid mixing rules. Berthelot–Lorentz combining rules are assumed for the binary interaction parameters. The topological classes of the resulting ternary phase diagrams are determined and their relationship to the classes of the binary subsystems discussed. It is shown that the phenomena of “miscibility windows’' and “miscibility islands’' are connected with a special ternary phase diagram class and can be reproduced even with the van der Waals equation of state.

References

1. P. H. van Konynenburg and R. L. Scott, Philos. Trans. R. Chem. Soc. L ondon Ser. A, 1980, 298, 495.
2. L. Z. Boshkov, Dokl. Akad. Nauk SSSR, 1987, 294, 901.
3. V. A. Mazur, L. Z. Boshkov and V. G. Murakhovsky, Phys. Lett., 1984, 104A, 415.
4. V. A. Mazur, L. Z. Boshkov and V. B. Fedorov, Dokl. Akad. Nauk SSSR, 1985, 282, 137.
5. L. Z. Boshkov and V. A. Mazur, Zh. Fiz. Khim. (Russ. J. Phys. Chem.), 1986, 60, 29.
6. U. K. Deiters and I. L. Pegg, J. Chem. Phys., 1989, 90, 6632.
7. T. Kraska and U. K. Deiters, J. Chem. Phys., 1992, 96, 539.
8. A. Bolz, PhD Thesis, Ruhr-Universität Bochum, 1992.
9. A. van Pelt, C. J. Peters and J. de Swaan Arons, J. Chem. Phys., 1991, 95, 7569.
10. A. van Pelt and T. W. de Loos, J. Chem. Phys., 1992, 97, 1271.
11. J. Kolafa, I. Nezbeda, J. Pavlíček and W. R. Smith, Fluid Phase Equilib., 1998, 146, 103.
12. J. Kolafa, I. Nezbeda, J. Pavlíček and W. R. Smith, Phys. Chem. Chem. Phys., 1999, 1, 4233.
13. A. Bolz, U. K. Deiters, C. J. Peters and T. W. de Loos, Pure Appl. Chem., 1998, 70(11), 2233.
14. R. J. Sadus, High Pressure Behaviour of Multicomponent Fluid Mixtures, Elsevier, Amsterdam, 1992.
15. D. E. Mainwaring, R. J. Sadus and C. L. Young, Fluid Phase Equilib., 1988, 42, 85.
16. D. E. Mainwaring, R. J. Sadus and C. L. Young, Chem. Eng. Sci., 1987, 42, 1717.
17. M. Heilig and E. U. Franck, Ber. Bunsen-Ges. Phys. Chem., 1989, 93, 898.
18. M. Heilig and E. U. Franck, Ber. Bunsen-Ges. Phys. Chem., 1990, 94, 27.
19. J. D. van der Waals, On the continuity of the gaseous and liquid states, volume XIV of Studies in Statistical Mechanics, North-Holland, Amsterdam, 1988.
20. R. Haase, Thermodynamik der Mischphasen, Springer, Berlin, 1956.
21. U. Deiters and G. M. Schneider, Ber. Bunsen-Ges. Phys. Chem., 1976, 80, 1316.
22. M. Spee and G. M. Schneider, Fluid Phase Equilib., 1991, 65, 263.
23. A. Kordikowski and G. M. Schneider, Fluid Phase Equilib., 1995, 105, 129.