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Prediction of finite-concentration activity coefficients from a single g.l.c.-determined activity coefficient at infinite dilution

1975; Elsevier BV; Volume: 7; Issue: 4 Linguagem: Inglês

10.1016/0021-9614(75)90172-x

1096-3626

Trevor M. Letcher, G. Netherton,

Process Optimization and Integration

The Guggenheim-Miller-Flory-Huggins equation and a one-parameter form of the Wilson equation can be used to fit activity coefficients for a range of hydrocarbon mixtures. In this work these two equations are shown to provide a simple and accurate method of estimating finite-concentration activity coefficients from a single g.l.c.-determined value of the infinite-dilution activity coefficient. The mixtures studied were cyclohexane + n-hexadecane, cyclohexane + n-eicosane, cyclohexane + squalane, n-hexane + n-hexadecane, and n-hexane + squalane. These mixtures were chosen because, in all cases, reliable activity coefficients at finite concentrations were available in the literature.