Experimental Measurement and Modeling of the Thermodynamic Behavior of the Vapor-Liquid Equilibrium of the {water + ethanol + deep eutectic solvent} systems at 101.3 kPa

• Grant number: 23/02057-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2023
• End date: October 31, 2024
• Field of knowledge: Engineering - Chemical Engineering - Chemical Technology
• Principal Investigator: Pedro Felipe Arce Castillo
• Grantee: Nícolas Pinheiro dos Santos
• Host Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil

Abstract

This project aims to perform the experimental study, consistency and the thermodynamic modeling of the vapor-liquid phase (VLE) behavior of water + ethanol + Deep eutectic solvents (DES) system, at 101,3 kPa. Experimental process will be performed in the equipment composed by the modified Othmer ebulliometer, thermostatic baths, temperature and pressure sensors, vacuum pump and digital manometer. The ebulliometer will be coated with glass wool and will have an adaptation for counting the condensed drops of the vapor phase. In the first stage, calibration curves (refractive index and density versus composition) will be made. In the second stage, vapor and liquid phase compositions, at equilibrium conditions, will be obtained through the calibration curves. In the third step, the thermodynamic consistency of the experimental data (Wisniack method) will be made. By using the data considered thermodynamically consistent, thermodynamic modeling will be performed using the gamma-phi (g-f) approach, where the activity coefficient, g, will be obtained from the NRTL (Non-Random Two-Liquids) model and the fugacity coefficient, f, will be fixed at 1,0 (P = 101,3 kPa). Results will be presented in terms of the deviations of the temperature and the vapor phase compositions (Bubble T), as phase diagrams: temperature vs. composition (triangular prism). Finally, the SEP efficiency as an "entrainer" will be compared with experimental results, obtained in previous research, with ionic liquids.