Abstract
A UNIFAC group contribution method with an explicit temperature dependent free volume term has been developed. The systems used in the development were benzene-polyethylene oxide from 319 to 423 K and n-hexane—n-hexadecane from 303 to 333K. The addition of temperature dependence to the proportionality factor in the free volume expression decreased the average error in prediction of the solvent activities from 15% to 6%.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
T. Oishi and J. M. Prausnitz,Ind. Eng. Chem. Proc. Des. Dev. 17, 333 (1978).
J. W. Van den Berg,Ind. Eng. Chem. Proc. Des. Dev. 23, 321 (1984).
As. Fredenslund, J. Gmehling, and P. Rasmussen,Vapor-Liguid Equilibria Using UNIFAC (Elsevier, New York, 1977).
J. Gmehling, P. Rasmussen, and As. Fredenslund,Ind. Eng. Chem. Proc. Des. Dev. 21, 118 (1982).
E. A. Macedo, U. Weidlich, J. Gmehling, and P. Rasmussen,Ind. Eng. Chem. Proc. Des. Dev. 22, 676 (1983).
P. J. Flory,Discuss. Faraday Soc. 49, 7 (1970).
C. Booth and c. J. Devoy,Polymer 12, 309, 320 (1971).
M. L. McGlashan and A. G. Williamson,Trans. Faraday Soc. 57, 588 (1961).
Y. H. Chang and D. C. Bonner,J. Appl. Polym. Sci. 19, 2457 (1975).
Y. Iwai, Y. Anai, and Y. Arai,Polymer Eng. Sci. 21, 1015 (1981).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bekker, A.Y., Knox, D.E. & Sund, S.E. Prediction of solvent activities using the UNIFAC-FV model. J Solution Chem 16, 635–639 (1987). https://doi.org/10.1007/BF00649090
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00649090