Abstract
The ability of an equation of state incorporating association to describe vapor-liquid equilibrium of methanol +n-alkane systems has been tested. An equation of state with association is divided into “physical” and “chemical” parts, where the Patel-Teja cubic equation of state is used for the description of the physical part and an association tenn forms the chemical part. Five two- and threeparameter mixing rules were tested and compared with an equation of state without association. On the average for the first eight n-alkanes, the improvement in fit of pressure using association was 30–50 % and the calculated vapor compositions were also much improved. In addition, there were lewer points with unstable liquid phase (false liquid-liquid split). Both with and without association, density-dependent mixing rules based on a local-composition concept gave the best result.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. Schwartzentruber, F. Galivel-Solastiouk, and H. Renon.Fluid Phase Equil. 38: 217 (1987).
P. Englezos. N. Kalogcrakis, and P. R. Bishnoi.Fluid Pluivc Equil. 53: 81 (1989).
P. Votika. P. Dittrich. and J. Lovland.Fluid Phase Equil. 88: 63 (1993).
G. D. Ikonomou and M. D. Donohue.Fluid Phase Equil. 33: 61 (1987).
A. Anderko.Fluid Phusc Equil. 45: 39 (1989).
H. Kempter and R. Mecke.Z. Phys. Chem. 46: 229 (1940).
A. Anderko.AIChE J. 37: 794 (1991).
H. Wenzel and E. Krop.Fluid Phys. Equil. 59: 147 (1990).
R. A. Heidemann and J. M. Prausnitz,Proc. Natl. Acad. Sci. 73: 1773 (1976).
N. C. Patel and A. S. Teja.Chem. Eng. Sci. 37: 463 (1982).
M. L. Michelsen and H. Kistenmacher,Fluid Phase Equil. 58: 229 (1990).
J. Mollerup.Fluid Phase Equil. 22: 139 (1985).
A. F. Francis. inCrifical Solution Temperatures (Am. Chem. Soc. Washington, DC, 1961 ). p. 115.
L. S. Budantseva. T. M. Lesteva. and M. S. Nemtsov,Zh. Fiz. Khim. 49: 1844 (1975).
J. B. Ou I. F. Hoelsche and G. M. Schneider,J. Chem. Thermodyn. 18: 815 (1986).
J. H. Hong. P. Malone, M. D. Jett, and R. Kobayashi,Fluid Phase Equil. 38: 83 (1987).
S. Zeek and H. Knapp,Fluid Phase, Equil. 25: 303 (1986).
K. Oghaki. F. Sano. and T. Katayania.J. Chem. Eng. Data 21: 55 (1976).
Y. H. Ma and J. P. Kohn.J. Chem. Eng. Data 9: 3 (1964).
F. Galivel-Solastiouk. S. Laugier, and D. Richon,Fluid Phase Equil. 28: 73 (1986).
C. B. Kretschmer and R. Wiebe.J. Am. Chem. Soc. 74: 1276 (1952).
A. D. Leu, C. J. Chen, and D. B. Robinson.AIChE Symp. Ser. 271(85):11 (1989).
U. Haarhaus and G. M. Schneider.J. Clim. Thermodyn. 20:1121 (1989).
L. S. Budantseva, T. M. Lesteva, and M. S. Nemtsov,Zh. Fiz. Khim. 49:1848 (1975).
R. D. Wilsak, S. W. Campbell, and G. Thodos,Fluid Phase Equil. 33:157 (1987).
L. S. Budantseva, T. M. Lesteva. and M. S. Nemtsov.Zh. Fiz. Khim. 49:260 (1975).
Th. W. de Loos, W. Poot, and J. de Swaan Arons.Fluid Phase Equil. 42:209 (1988).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Vonka, P., Lovland, J. & Prokes, T. Describing vapor-liquid equilibria in methanol +n-alkane systems by means of an equation of state with association. Int J Thermophys 16, 227–236 (1995). https://doi.org/10.1007/BF01438973
Issue Date:
DOI: https://doi.org/10.1007/BF01438973