Influence of antioxidants from pequi leaves on the thermal and oxidative stability of biodiesel

Influence of antioxidants from pequi leaves on the thermal and oxidative stability of biodiesel

In this study, the efficacy of antioxidants found in pequi leaves was examined for safeguarding pequi biodiesel (EBP) against oxidation. The results reveal notable achievements. The antioxidant activity of AFP (a pequi leaf antioxidant additive) was assessed at various concentrations, demonstrating...

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Bibliographic Details
Published in:Biofuels, bioproducts and biorefining Vol. 18; no. 5; pp. 1385 - 1395
Main Authors: Irineu, Ranuir Lucas de Oliveira, Silva, Victor Juan Rodrigues da, Nogueira, Josiane da Rocha Ferreira, Merlo, Thais Cardoso, Rial, Rafael Cardoso
Format: Journal Article
Language:English
Published: Chichester, UK John Wiley & Sons, Ltd 01-09-2024
Wiley Subscription Services, Inc
Subjects:
Acidity
Antioxidant properties
Antioxidants
biodiesel
Biodiesel fuels
biofuel
Biofuels
CCAAT/enhancer-binding protein
Degradation
Diesel
Effectiveness
Leaves
Moisture content
natural antioxidants
Oxidation
pequi
Quality standards
Stability analysis
Terpenes
Thermal degradation
Thermal stability
Thermogravimetric analysis
Water content
Water quality
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Summary:In this study, the efficacy of antioxidants found in pequi leaves was examined for safeguarding pequi biodiesel (EBP) against oxidation. The results reveal notable achievements. The antioxidant activity of AFP (a pequi leaf antioxidant additive) was assessed at various concentrations, demonstrating that as the concentration of AFP increases, the inhibition percentage significantly rises, reaching a remarkable inhibition of 99.12% at 100 mg L−1, with a calculated IC50 of 25.4 mg L−1. Additionally, the analysis of the AFP composition revealed the presence of terpenes and oxygenated compounds, which are well known for their antioxidant properties. Furthermore, the research emphasized the significance of thermogravimetric analysis in evaluating the thermal stability of additives, identifying critical temperatures at which AFP begins to protect biodiesel against oxidation (247.18°C) and the point at which its effectiveness may diminish (469.19°C). The EBP met quality standards regarding acidity, water content and density, but exhibited slightly lower oxidative stability compared with established standards. The correlation between the thermal degradation of biodiesel and the induction period highlighted the efficacy of AFP in mitigating thermal degradation. Nevertheless, it also indicated that maintaining biodiesel quality requires complementary approaches to minimize degradation over time.
ISSN:1932-104X
1932-1031
DOI:10.1002/bbb.2629