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

Author(s)

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

• Document type: Journal article
• Source: ENERGY & FUELS; v. 23, n. 9, p. 4625-4629, 2009.
• Field of knowledge: Agronomical Sciences - Food Science and Technology

Abstract

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)

• FAPESP's process: 08/56258-8 - Phase equilibrium and purification processes in the production of biofuels and biocompounds
• Grantee: Antonio José de Almeida Meirelles
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants
• FAPESP's process: 05/53095-2 - Phase equilibrium and separation processes of fatty and aqueous food solutions
• Grantee: Antonio José de Almeida Meirelles
• Support Opportunities: Research Projects - Thematic Grants