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

By RC Basso, CAS da Silva, CD Sousa, AJD Meirelles and EAC Batista

Abstract

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)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.131468475Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FAPESP [08/56258-8]CNPq [140362/2009-6

Topics: Biodiesel, Macauba oil, Liquid-liquid equilibrium, Themodynamic modeling, Sensitivity analysis, Liquid-liquid Equilibrium, Glycerol Plus Ethanol, Supercritical Alcohols, Vegetable-oils, Canola Oil, Systems, Mixtures, Prediction, Esters, Temperatures
Publisher: Inglaterra
Year: 2015
DOI identifier: 10.1016/j.biortech.2012.12.190
OAI identifier: oai:repositorio.unicamp.br:REPOSIP/52472
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