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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Liquid-liquid equilibrium data and thermodynamic modeling of systems involved in the biodiesel production in terms of acylglycerols, free fatty acids, ethyl esters, and ethanol at 303.2 and 318.2 K and local pressure

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Author(s):
Shiozawa, Simone [1] ; Goncalves, Daniel [1] ; Ferreira, Marcela C. [2] ; Meirelles, Antonio J. A. [1] ; Batista, Eduardo A. C. [1]
Total Authors: 5
Affiliation:
[1] Univ Campinas UNICAMP, Fac Food Engn FEA, Dept Food Engn DEA, Lab Extract Appl Thermodynam & Equilibrium ExTrAE, Monteiro Lobato St 80, BR-13083862 Campinas, SP - Brazil
[2] Univ Campinas UNICAMP, Fac Technol, Pascoal Marmo St 1888, BR-13484332 Limeira, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Fluid Phase Equilibria; v. 507, MAR 1 2020.
Web of Science Citations: 0
Abstract

Researches on renewable fuels as biodiesel are being done due to the global concern about the shortage of non-renewable natural energy resources. For the biodiesel production, vegetable oils are transesterified with short-chain alcohols, generating intermediate compounds as monoacylglycerols (MAG) and diacylglycerols (DAG). In order to understand the first stage of the transesterification reaction during the biodiesel production, this study reported experimental liquid-liquid equilibrium (LLE) data and the thermodynamic modeling of systems composed of refined oil (soybean, cottonseed, and rice bran) + commercial mixture of partial acylglycerols (MAG and DAG) + free fatty acids (FFA) + fatty acid ethyl esters (FAEE) + ethanol at T = (303.2 and 318.2) K. The LLE experimental data were thus used to adjust the NRTL model parameters and to evaluate three parameters sets of the UNIFAC model. Calculated results by the NRTL model were well correlated to the experimental ones, with mass deviations up to 0.32%, whereas the deviations calculated for the UNIFAC model ranged from 1.04 to 9.46%. FFA and MAG exhibited preference to the solvent-rich phase, whereas FAEE and DAG preferred the oil-rich phase. New and more complex LLE data considering partial acylglycerols, FFA, besides the FAEE, as here reported, can assist to describe the real behavior of the transesterification step involved in the biodiesel production process and, consequently, its optimization. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 18/13207-6 - Extraction and computational simulation of ethanolic biodiesel production from peanut oil
Grantee:Daniel Gonçalves
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 14/21252-0 - Equilibrium and production processes of biofuels and bioproducts
Grantee:Antonio José de Almeida Meirelles
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales
Grantee:Roberto de Campos Giordano
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants
FAPESP's process: 17/21607-1 - Use of ethanol associated with ionic liquids in vegetable oils refining and biodiesel physical properties production and modification
Grantee:Marcela Cravo Ferreira
Support Opportunities: Scholarships in Brazil - Post-Doctoral