DESENVOLVIMENTO DE APLICATIVO EM LINGUAGEM DE PROGRAMAÇÃO FORTRAN 90/95 PARA RESOLUÇÃO DO PROBLEMA DE EXTRAÇÃO LÍQUIDO – LÍQUIDO EM CORRENTES CRUZADAS

Abstract

This work aims to develop a windows application in Fortran 90/95 with a graphic user interface (GUI) for the resolution of the liquid-liquid multistage cross-current extraction for ternary systems. It’s initially discussed the liquid-liquid equilibrium, comprising the topics of the liquid-liquid equilibrium criteria and the graphic representations for ternary systems. Subsequently, it’s presented a topic regarding the Excess Gibbs free energy on its dimensionless form of the UNIQUAC model (Universal Quasi-Chemical) and the relation between the activity coefficients logarithms (partial property) in order to acquire its mathematical expressions, which are used to correct the non-ideal behave of the liquid phase. Then, a discussion on the liquid-liquid extraction operation follows, regarding the single stage, the multistage cross current processes and the numeric solution for those cases. The last topic of the theoretical review presents the 90/95 Fortran version and its Windows and console applications. In order to keep the source code of the developed application confidential, the methodology section of this report provide a generic guide to create console and windows applications, permitting the reader to understand the basic procedure to develop those types of projects. The results section covers the developed application’s features. For this first version incorporates two ternary systems to the data bank. The developed software presented good results for the equilibrium compositions of the incorporated ternary systems.