Castor–babassu biodiesel blends: estimating kinetic parameters by Differential Scanning Calorimetry using the Borchardt and Daniels method
| Autor: | Célio L. Cavalcante, Tassio Lessa do Nascimento, Igor M. Figueredo, Maria Alexsandra de Sousa Rios, Yguatyara de Luna Machado, Rodrigo Silveira Vieira, Rubem S. F. Paula |
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| Rok vydání: | 2019 |
| Předmět: |
Acid value
Biodiesel Materials science General Chemical Engineering General Engineering Oxidation stability General Physics and Astronomy Transesterification Kinetic energy Catalysis Reaction rate Differential scanning calorimetry General Earth and Planetary Sciences General Materials Science General Environmental Science Nuclear chemistry |
| Zdroj: | SN Applied Sciences. 1 |
| ISSN: | 2523-3971 2523-3963 |
| Popis: | The main objective of this study was to assess the kinetics of the deterioration of blends of babassu and castor biodiesel. The biodiesel samples were synthesized by catalytic transesterification and characterized for their main physical properties such as kinematic viscosity, density, acid number, ester content, and oxidation stability. Thermal profiles were carried out using the Differential Scanning Calorimetry technique as presented in the American Society for Testing and Materials (ASTM) E537 standard. Kinetic parameters were obtained using ASTM E2041 standard (Borchardt–Daniels method), following a statistical treatment from the ASTM E1970 standard. Among all samples, the pure castor biodiesel sample showed the highest extrapolated onset temperature (Ts), 214.92 °C, and lowest reaction rate [k(T)], 1.02 × 10−3 min−1, indicating that this sample is more resistant to oxidation. On the other hand, the blend with the babassu/castor biodiesel mass ratio of 75/25 was the most prone to oxidize. Thus, castor biodiesel may be used as an additive to improve the oxidative stability of other sources of biodiesel, including babassu biodiesel. |
| Databáze: | OpenAIRE |
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