Thermal behavior of diesel/biodiesel blends of biodiesel obtained from buriti oil - doi: 10.4025/actascitechnol.v34i2.12797
DOI:
https://doi.org/10.4025/actascitechnol.v34i2.12797Keywords:
transesterification, vegetable oils, thermogravimetric evaluationAbstract
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 (Δ≠G), enthalpy (Δ≠H) and entropy (Δ≠S) of activation were determined by using Coats - Redfern equation. The Ea, Δ≠H and Δ≠G 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.
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