Kinetics of ultrasound-assisted enzymatic biodiesel production from Macauba coconut oil

Simone Michelin, Frederico M. Penha, Melania M. Sychoski, Robison P. Scherer, Helen Treichel, Alexsandra Valério, M. Di Luccio, Débora de Oliveira and J. Vladimir Oliveira

Renewable Energy, 2015, vol. 76, issue C, 388-393

Abstract: This work reports the production of fatty acid ethyl esters (FAEE) by means of Macauba (Acrocomia aculeata) coconut oil (MCO) solvent-free enzymatic transesterification reactions using a commercial immobilized lipase (Novozym 435) under the influence of ultrasound irradiation. An experimental design was used to evaluate the effects of temperature (40–70 °C), enzyme (5–20 wt%) concentration, oil to ethanol molar ratio (1:3–1:10) and output irradiation power (40–70 % of the maximum supply value) on the reaction yield. Besides, a kinetic study varying the enzyme concentration was also carried out. Results show that ultrasound-assisted lipase-catalyzed transesterification of MCO with ethanol in solvent-free system might be a potential alternative route to conventional alkali-catalyzed and/or traditional enzymatic methods, as reaction yields around 70 wt% were obtained at mild irradiation power supply (∼ 132 W), and temperature (65 °C) in a short reaction time, 30 min. Reutilization of enzyme showed that it may be advantageously employed up to 5 reuse cycles.

Keywords: Ultrasound; Biodiesel; Lipase; Acrocomia aculeate; Convertibility (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:76:y:2015:i:c:p:388-393

DOI: 10.1016/j.renene.2014.11.067

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