Crystallization behavior of mixtures of fatty acid ethyl esters with ethyl stearate

Autor(es)

Boros‚ L. ; Batista‚ MLS ; Vaz‚ R.V. ; Figueiredo‚ BR ; Fernandes‚ VFS ; Costa‚ MC ; Krahenbuhl‚ MA ; Meirelles‚ AJA ; Coutinho‚ JAP

• Tipo de documento: Artigo Científico
• Fonte: ENERGY & FUELS; v. 23, n. 9, p. 4625-4629, 2009.
• Área do conhecimento: Ciências Agrárias - Ciência e Tecnologia de Alimentos
• Assunto(s): Ácidos graxos Cristalização Biocombustíveis Biodiesel

Resumo

In spite of their interest to understand the low-temperature behavior of biodiesel, data on the crystallization behavior of fatty acid esters mixtures are scarce. To overcome this limitation, the melting points of seven binary mixtures of saturated and unsaturated fatty acid ethyl esters with ethyl stearate were measured by differential scanning calorimetry (DSC) and are here reported. The Predictive UNIQUAC model, developed for the prediction of cloud points of diesels and previously applied to fatty acid methyl esters, is shown to produce an excellent prediction of the experimental data measured in this work. It is shown that, alternatively, a simple ideal solution is able to describe the melting points with identical accuracy to the Predictive UNIQUAC model and may prove to be able to describe cloud points of real biodiesel. (AU)

• Processo FAPESP: 08/56258-8 - Phase equilibrium and purification processes in the production of biofuels and biocompounds
• Beneficiário: Antonio José de Almeida Meirelles
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
• Processo FAPESP: 08/09502-0 - Estudo detalhado do equilíbrio sólido-líquido de misturas de álcoois graxos com ácidos graxos
• Beneficiário: Mariana Conceição da Costa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 05/53095-2 - Equilíbrio de fases e processos de separação de misturas graxas e aquosas
• Beneficiário: Antonio José de Almeida Meirelles
• Modalidade de apoio: Auxílio à Pesquisa - Temático