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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Liquid-liquid equilibrium of systems containing triolein plus (fatty acid/partial acylglycerols/ester) plus ethanol: Experimental data and UNIFAC modeling

Texto completo
Autor(es):
Ferreira, Marcela Cravo [1] ; Bessa, Larissa C. B. A. [1] ; Abreu, Charles R. A. [2] ; Meirelles, Antonio J. A. [1] ; Caldas Batista, Eduardo Augusto [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Campinas UNICAMP, Fac Food Engn FEA, EXTRAE, Dept Food Engn DEA, BR-13083970 Campinas, SP - Brazil
[2] Fed Univ Rio de Janeiro UFRJ, Sch Chem, BR-21941909 Rio De Janeiro, RJ - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Fluid Phase Equilibria; v. 476, n. B, p. 186-192, NOV 25 2018.
Citações Web of Science: 2
Resumo

The demand for biofuels, such as biodiesel, has a very powerful appeal nowadays. In some countries, such as Brazil, the biodiesel production by ethylic route has some advantages, since ethanol is a renewable alcohol produced in a large scale and at a competitive production cost. Besides being an alternative reactant, ethanol can be used as a solvent for extracting vegetable oils from seeds and also for deacidifying crude vegetable oil by liquid-liquid extraction. Such characteristics of ethanol suggest the need to investigate the ethylic route for biodiesel production. The comprehension of liquid-liquid equilibrium (LLE) is essential for the design and optimization of liquid-liquid extraction for deacidification processes of vegetable oils and for systems which correspond to the initial stage of transesterification reaction with ethanol. In this context, this study aimed to measure the liquid-liquid equilibrium data of ternary systems with pure fatty components containing triolein + (fatty acid or partial acylglycerols or ester) + ethanol at 45 degrees C. As the prediction of UNIFAC with literature parameters was poor, these ternary data were used to readjust the UNIFAC parameters. The global average deviation between experimental and calculated compositions decreased from 6.48% to 1.48%. The prediction capacity of the UNIFAC model with this new parameter set was evaluated in multicomponent systems related to biodiesel production. An improvement in the prediction of the LLE with these parameters was achieved in comparison to the results using the original UNIFAC parameters available in the literature. (C) 2018 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 14/21252-0 - Equilíbrio e processos de produção de biocombustíveis e bioprodutos
Beneficiário:Antonio José de Almeida Meirelles
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
Beneficiário:Roberto de Campos Giordano
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Temático