Are the binary interaction parameters from the regression of vapor-liquid equilibrium data the same as those from the regression of liquid-liquid equilibrium data?
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For binary systems, are the binary interaction parameters obtained by regression using vapor-liquid equilibrium data and liquid-liquid equilibrium data the same? If different results are obtained, can it be said that the calculation of an extraction column should be based on parameters derived from liquid-liquid equilibrium, while the calculation of a distillation column should be based on parameters derived from vapor-liquid equilibrium?
Some activity methods, such as NRTL, can be used for estimating liquid-liquid phases. The parameters used for liquid-liquid equilibrium and gas-liquid equilibrium should be the same. However, the original Wilson method cannot predict liquid-liquid equilibrium; it can only predict gas-liquid equilibrium. This has not been examined in detail, and I am not aware of how Aspen handles this situation