Liquid-liquid equilibrium data and thermodynamic modeling, at T/K=298.2, in the washing step of ethyl biodiesel production from crambe, fodder radish and macauba pulp oils

Author(s)

Basso, Rodrigo Correa ; Miyake, Fabio Hideki ; de Almeida Meirelles, Antonio Jose ; Caldas Batista, Eduardo Augusto

• Document type: Journal article
• Source: FUEL; v. 117, p. 8-pg., 2014-01-01.

Abstract

In this work, pseudo-ternary liquid-liquid equilibrium data were obtained for three systems composed for water + ethanol + ethyl biodiesel from crambe, fodder radish and macauba pulp oils, at T/K = 298.2. Ethanol, which distributes in both phases, had greater affinity for the water-rich phase. Biodiesels and water showed almost complete immiscibility. Modeling with the NRTL and UNIQUAC thermodynamic models was performed, resulting in average deviations ranging from 0.49% to 1.29%. UNIFAC-LLE and UNIFAC-Dortmund were used in prediction of the liquid-liquid equilibrium of these systems, resulting in average deviations ranging from 1.91% to 2.27% for the systems containing biodiesel from crambe and fodder radish oils, and ranging from 3.17% to 3.28% for biodiesel from macauba oil. (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