Interaction model for critical temperatures of multicomponent mixtures of methane-free aliphatic hydrocarbons
Article first published online: 17 JUN 2004
Copyright © 1965 American Institute of Chemical Engineers
Volume 11, Issue 5, pages 897–900, September 1965
How to Cite
Ekiner, O. and Thodos, G. (1965), Interaction model for critical temperatures of multicomponent mixtures of methane-free aliphatic hydrocarbons. AIChE J., 11: 897–900. doi: 10.1002/aic.690110528
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
- Manuscript Accepted: 12 APR 1965
- Manuscript Revised: 9 APR 1965
- Manuscript Received: 14 DEC 1964
A mathematical treatment based on an interaction model has yielded an expression capable of establishing the critical temperatures of multicomponent aliphatic hydrocarbon mixtures. This model postulates an infinite-series expansion for the difference between the actual critical temperature and its corresponding pseudocritical value. For methane-free aliphatic hydrocarbon mixtures, this infinite series has been truncated beyond the third-order interactions. Explicit relationships are given for the second-order interaction coefficients Aij and Bij as a function of the binary-system parameter τij and the third-order interaction coefficient βijk as a function of χijk, the ternary-system parameter.
This interaction model has been applied to one hundred-sixteen different compositions of binary, ternary, quaternary, and quinary aliphatic hydrocarbon systems to produce an overall average deviation of 0.35%. Owing to the different interaction behavior of methane, systems containing methane have not been included in this study.