Thermal behavior of diesel/biodiesel blends of biodiesel obtained from buriti oil - doi: 10.4025/actascitechnol.v34i2.12797

Rômulo Davi Albuquerque Andrade, Ellen Pozzebom, Elaine Alves Faria, Francisco Dantas Filho, Paulo Anselmo Ziani Suarez, Alexandre Gustavo Soares do Prado


Biodiesel has been obtained from methanolysis of buriti oil. This biodiesel was added in fossil diesel in order to obtain diesel/biodiesel blends. Thermal analysis of blends were carried on 30-600oC range at rate of 10oC min.-1. Kinetic parameters such as activation energy (Ea), pre-exponential factor (A), Gibbs energy (ΔG), enthalpy (ΔH) and entropy (ΔS) of activation were determined by using Coats–Redfern equation. The Ea, ΔH and ΔG values presented a linear increase with biodiesel amount added in blends. The heat of combustion of diesel/biodiesel blends was determined, and it was observed that the heat of combustion decreased with the addition of biodiesel in diesel/biodiesel blends.


transesterification; vegetable oils; thermogravimetric evaluation

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ISSN 1806-2563 (impresso) e ISSN 1807-8664 (on-line) e-mail:


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