Vapor−Liquid Equilibria at 101.32 kPa and Excess Properties of Binary Mixtures of Butyl Esters + tert-Butyl Alcohol
| Autor: | Juan Ortega, Fernando Espiau, Miguel Postigo |
|---|---|
| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | Journal of Chemical & Engineering Data. 50:444-454 |
| ISSN: | 1520-5134 0021-9568 |
| DOI: | 10.1021/je0497350 |
| Popis: | This work shows the experimental values of excess properties and at two temperatures and the isobaric vapor−liquid equilibria at 101.32 kPa for binary systems composed of the first four butyl alkanoates with tert-butyl alcohol. None of the mixtures presented azeotropes, and all of the experimental data p−T−x−y were checked with a point-to-point test, proving to be thermodynamically consistent. The correlation of vapor−liquid equilibria and excess enthalpies was done simultaneously using different expressions with temperature-dependent coefficients. The model that gave the most acceptable correlation for the four mixtures was the polynomial expression proposed in this work. The NRTL model gave acceptable estimations of , and the UNIQUAC, of equilibrium data. Two versions of the UNIFAC model were used: the original one with parameters by Hansen et al. and the version modified by Gmehling et al., which predicts the equilibrium data as the mixing enthalpies. This last version estimated with differences of ar... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|