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Solid-liquid equilibrium in ternary mixtures of ethyl laurate, ethyl palmitate and ethyl stearate

Texto completo
Autor(es):
Robustillo, Maria Dolores [1] ; Barbosa, Deise Fernanda [1] ; de Almeida Meirelles, Antonio Jose [2] ; Pessoa Filho, Pedro de Alcantara [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sch Engn, Dept Chem Engn, BR-05424970 Sao Paulo - Brazil
[2] Univ Estadual Campinas, UNICAMP, Dept Food Engn, Sch Food Engn, BR-13083862 Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Fluid Phase Equilibria; v. 358, p. 272-281, NOV 25 2013.
Citações Web of Science: 7
Resumo

Biodiesel is a substitute fuel for petroleum-based diesel obtained from vegetables, formed by fatty acid methyl or ethyl esters produced by transesterification reaction between fats or oils and alcohols. An experimental study of solid-liquid equilibrium of ternary mixtures of ethyl esters commonly present in biodiesel (ethyl laurate, ethyl palmitate and ethyl stearate) was carried out using differential scanning calorimetry. Experimental results show that no eutectic composition is observed for ternary systems, although binary systems formed by ethyl laurate and ethyl palmitate as well as ethyl laurate and ethyl stearate present eutectic points at >= 90% (m/m) of ethyl laurate, indicating solid phase immiscibility. The system ethyl palmitate and ethyl stearate forms solid solutions for all compositions (miscible system). The experimental results were modeled using the Flory-Huggins equation for liquid phase and, when applicable, solid phase non-ideality, with good agreement. (C) 2013 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 10/18355-1 - Estudo do equilíbrio sólido-líquido de misturas de ésteres etílicos
Beneficiário:Maria Dolores Robustillo Fuentes
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 08/56258-8 - Phase equilibrium and purification processes in the production of biofuels and biocompounds
Beneficiário:Antonio José de Almeida Meirelles
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Temático