Comparison of an eNRTL Mathematical Model for the CO2-NH3-NaCl-H2O Liquid-Vapour Equilibrium with experimental data

Abstract

The aim of this works is to validate an eNRTL rigorous mathematical model, developed in GAMS (General Algebraic Modelling System), to describe the liquid-vapor equilibrium of a CO₂-NH₃-NaCl-H₂O system. The validation process is carried out by comparing the results obtained with experimental data and information extracted from a commercial simulator. The results show a good approximation in most of the evaluated experimental data and excellent agreement with the values obtained by simulation.
The main objective of this research is to contribute to the advancement in the development of a plant that integrates the absorption of carbon dioxide in ammoniacal water with the use of concentrated brine for the recovery of these effluents, with the purpose of adding value to the process.