Experimental study and Modeling of the Liquid-Liquid Equilibrium of the water + 1-butanol + deep eutectic solvent systems at 298.15 K and 101.3 kPa

• Grant number: 23/01846-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2023
• End date: April 30, 2024
• Field of knowledge: Engineering - Chemical Engineering - Chemical Technology
• Principal Investigator: Pedro Felipe Arce Castillo
• Grantee: Isadora Pires Gomes
• Host Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil

Abstract

This project aims to perform the experimental measurements, quality testing, Distribution coefficient and Separation factor, and thermodynamic modeling of the fluid phase behavior of the liquid-liquid equilibrium based on the extraction of 1-butanol from water by using Deep eutectic solvents (DES). The experimental process will be performed in a glass equipment which will consist of the equilibrium cell with an adaptation to keep the temperature constant with the thermostatic bath. Once equilibrium is reached, the analyzes (composition of the two liquid phases) will be made through the refractive index and density. Previously, binodal curve will be obtained in the cloud point and will be used as calibration curve (refractive index and density versus composition). The quality test of the experimental data will be performed with the Marcilla and collaborator's method. With the experimental data, the distribution coefficients and separation factor will be determined. For the thermodynamic modeling, the Gamma-Gamma (g-g) approach, based on the excess Gibbs free energy model: NRTL (Non-Random Two-Liquids). Experimental and modeled results will be presented in a phase diagram for ternary systems (binodal curve and tie-lines) at 298,15 K and 101,3 kPa. Finally, the DES extraction efficiency will be compared with experimental ones, obtained in previous research, using ionic liquids