Influence of the raw material on the final properties of biodiesel produced using lipase from Rhizomucor miehei grown on babassu cake as biocatalyst of esterification reactions
terça-feira, julho 30, 2019
Authors: Erika C. G. Aguieiras; Daniele S. N. de Barros; Homero Sousa; Roberto Fernandez-Lafuente; Denise M. G. Freire
![Resultado de imagem para biodiesel macaúba](https://farm8.staticflickr.com/7258/7590108348_abac578283.jpg)
A final conversion above 80% was attained using palm fatty acid distillate (PFAD) and soybean fatty acid distillate (SFAD) as raw materials in esterification reactions with ethanol. The biocatalyst could be reused 5 times in repeated 6 h reactions after its washing with 95% (v/v) ethanol or hexane (using SFAD as raw material). Moreover, the properties of the obtained fatty acid ethyl esters (FAEE)-enriched products were characterized.
Both products were in accordance with several limits established by biodiesel-related standardized tests from Brazilian specifications including ester content (97.3% for the product obtained from SFAD), water content (180 mg Kg−1 for the product obtained from PFAD), density (867.6 kg (m3)−1for the product obtained from SFAD), viscosity kinematic (3.14–4.29 mm2 s−1), flash point (<100 °C), carbon residue (0.01 wt.%), ethanol (0.08–0.083 wt.%), free glycerol (<0.001 wt.%) and total glycerol (0.028–0.10 wt.%), monoglycerides (0.076–0.211 wt.%), diglycerides (0.0196–0.218 wt.%) and triglycerides (0.053–0.114 wt.%).
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Page: Science Direct
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