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  • 1 CCSST, Universidade Federal do Maranhão—UFMA, Imperatriz, MA, 65900-410, Brazil
  • 2 Departamento de Química, CCEN, Universidade Federal da Paraíba, João Pessoa, PB, 58059-900, Brazil
  • 3 Centro de Educação e Saúde, Universidade Federal de Campina Grande, Cuité, PB, Brazil
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Abstract

Nowadays the growing fuel deficit requires the development of alternative fuel sources. Biodiesel is a good substitute to the conventional diesel because it is quite similar to the fossil fuel in its main characteristics. However, there are some obstacles, as the properties of cold-flow, to the development of a more useful alternative fuel. In this work we use the X-ray diffraction and differential calorimetry scanning to study low temperature properties of ethylic Babassu biodiesel. Our results show that the nucleation of crystals starts below −8 °C and the crystallization temperature does not change significantly when the sample was submitted to a winterization process. The higher concentrations of ethyl esters from saturated fat acid are probably responsible for this characteristic. The X-ray diffraction, combined with DSC measurements, was efficiently employed in the characterization of cold-flow biodiesel properties, showing to be very helpful techniques.

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