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

Abstract

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 30-600°C range at rate of 10°C 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.