LLE experimental data, thermodynamic modeling and sensitivity analysis in the ethyl biodiesel from macauba pulp oil settling step

Author(s)

Basso, Rodrigo Correa ^[1] ; Sodre da Silva, Cesar Augusto ^[1] ; Sousa, Camila de Oliveira ^[1] ; de Almeida Meirelles, Antonio Jose ^[1] ; Caldas Batista, Eduardo Augusto ^[1]

Affiliation

^[1] Univ Estadual Campinas, UNICAMP, Sch Food Engn, Dept Food Engn, Lab Extract Appl Thermodynam & Equilibrium ExTrAE, BR-13083862 Campinas, SP - Brazil

• Document type: Journal article
• Source: Bioresource Technology; v. 131, p. 468-475, 2013.
• Web of Science Citations: 22

Abstract

The aim of this study was to obtain experimental data related to liquid-liquid equilibrium (LLE) of systems containing glycerol + ethanol + ethyl biodiesel from macauba pulp oil, perform thermodynamic modeling and simulate the settling step of this biodiesel using simulation software. Binary interaction parameters were adjusted for NRTL and UNIQUAC models. The UNIFAC-LLE and UNIFAC-Dortmund models were used to predict the LLE of the systems. A sensitivity analysis was applied to the settling step to describe the composition of the output streams as a function of ethanol in the feed stream. Ethanol had greater affinity for the glycerol-rich phase. The deviations between experimental data and calculated values were 0.44%, 1.07%, 3.52% and 2.82%, respectively, using the NRTL, UNIQUAC, UNIFAC-LLE and UNIFAC-Dortmund models. Excess ethanol in the feed stream causes losses of ethyl ester in the glycerol-rich stream and high concentration of glycerol in the ester-rich stream. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 08/56258-8 - Phase equilibrium and purification processes in the production of biofuels and biocompounds
• Grantee: Antonio José de Almeida Meirelles
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants