Enzyme-catalyzed production of biodiesel by ultrasound-assisted ethanolysis of soybean oil in solvent-free system.

Autor: Trentin CM; Department of Food Engineering, URI-Campus de Erechim, Av. Sete de Setembro, 1621, Erechim, RS, 99700-000, Brazil., Popiolki AS, Batistella L, Rosa CD, Treichel H, de Oliveira D, Oliveira JV
Jazyk: angličtina
Zdroj: Bioprocess and biosystems engineering [Bioprocess Biosyst Eng] 2015 Mar; Vol. 38 (3), pp. 437-48. Date of Electronic Publication: 2014 Nov 04.
DOI: 10.1007/s00449-014-1316-0
Abstrakt: This work reports the transesterification of soybean oil with ethanol using a commercial immobilized lipase, Novozym 435, under the influence of ultrasound irradiation, in a solvent-free s. The experiments were performed in an ultrasonic water bath, following a sequence of experimental designs to evaluate the effects of temperature, enzyme and water concentrations, oil to ethanol molar ratio and output irradiation power on the reaction yield. Besides, a kinetic study varying the substrates molar ratio and enzyme concentration was also carried out. Results show that ultrasound-assisted lipase-catalyzed transesterification of soybean oil with ethanol in solvent-free system might be a potential alternative route to conventional alkali-catalyzed and/or traditional enzymatic methods, as high reaction yields (~78 wt%) were obtained at mild irradiation power supply (~132 W), and temperature (63 °C) in a relatively short reaction time, 1 h. Additionally, a study regarding the enzyme reuse was carried out at the experimental condition that afforded the best reaction yield.
Databáze: MEDLINE
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