Prediction and Correlation of Liquid-Liquid Equilibria

Document Type

Article

Publication Date

1-1-1982

Abstract

The NRTL, LEMF, and UNIQUAC models are used in the prediction and correlation of liquid-liquid equilibrium data for ten type I systems. The results Indicate that best predictions are obtained with the LEMF equation, with an overall average absolute percentage error In distribution coefficients of 19.5 as compared to 23.0 and 24.7 with the NRTL and UNIQUAC equations, respectively. Good correlation of liquid-liquid equilibrium data alone is obtained with all three models; the LEMF equation is slightly better with an overall average absolute percentage error in distribution coefficients of 5.5 as compared to 6.7 and 5.9 for the NRTL and UNIQUAC equations, respectively. The same applies for the simultaneous correlation of liquid-liquid and binary vapor-liquid equilibrium data, where the combined errors for the distribution and activity coefficients are LEMF, 6.5; NRTL, 8.8; and UNIQUAC, 8.2. In all cases best results are obtained for systems having large mutual solubilities, and become progressively worse as the mutual solubility decreases. © 1982, American Chemical Society. All rights reserved.

Identifier

0019910825 (Scopus)

Publication Title

Industrial and Engineering Chemistry Process Design and Development

External Full Text Location

https://doi.org/10.1021/i200016a030

ISSN

01964305

First Page

174

Last Page

180

Issue

1

Volume

21

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