Modelamiento de datos de equilibrios líquido-vapor de sistemas binarios con Cloroformo Isobáricos e Isotérmicos mediante las ecuaciones empíricas y modelos de composición local, para la determinación de los coeficientes de actividad.

Abstract

ELV data from binary mixtures of chloroform-hexane (328.15 K), chloroform-acetonitrile (328.15 K), chloroform-tetrahydrofuran THF (303.15 K), and chloroform-benzene (101.33 kPa) were selected from the Dortmund database (Dortmund Data Bank, s. f.), with the purpose of applying the empirical equations of Margules and Van Laar; and the Wilson and NRTL local composition models for the prediction of the equilibrium data. This ELV data prediction process was developed through the use of Microsoft Excel® spreadsheets, a tool through which the specific parameters for each analyzed model were obtained, these parameters in turn allowed the determination of the coefficients of respective activity for the solvents in each system and model developed. This investigation allowed us to conclude that in the isothermal systems of chloroformhexane and chloroform-acetonitrile, the model that presents the best fit in the data is Wilson with a deviation of 0.182 kPa and 0.39 kPa respectively, in the chloroform-THF system the Van Laar model presents the best fit with a deviation of 0.357 kPa and finally, in the isobaric system of chloroform-benzene, the one with the best fit was the Margules model with a deviation of 0.1016 kPa. In the chloroform-THF system, the analyzed models did not adjust optimally to the experimental data, so the Herington consistency test was performed, obtaining that it did not have a thermodynamic consistency.