کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1265382 | 972217 | 2012 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Kinetics of ultrasound-assisted lipase-catalyzed glycerolysis of olive oil in solvent-free system Kinetics of ultrasound-assisted lipase-catalyzed glycerolysis of olive oil in solvent-free system](/preview/png/1265382.png)
This work reports experimental kinetic data of solvent-free glycerolysis of olive oil using a commercial immobilized lipase (Novozym 435) under the influence of ultrasound irradiation. The experiments were performed in a mechanically stirred reactor under ultrasound irradiation, evaluating the effects of temperature (50–70 °C), enzyme concentration (2.5–10 wt%) and glycerol to oil molar ratio (0.8:1–3:1). Results show that ultrasound-assisted lipase-catalyzed glycerolysis might be a potential alternative route to conventional methods, as high contents of reaction products, especially monoglycerides, were achieved at mild irradiation power supply (∼130 W) and temperature, in a relatively short reaction time (2 h) and low enzyme content (7.5 wt%). To completeness, two simplified kinetic modeling approaches, based on the ordered-sequential bi bi mechanism and reaction stoichiometry, were employed to represent the experimental data, thus allowing a better understanding of the reaction kinetics.
► Experimental kinetic data of solvent-free glycerolysis of olive oil with Novozym 435.
► High contents of reaction products, MAG and DAG were obtained.
► Two simplified kinetic modeling were employed to model the experimental data.
Journal: Ultrasonics Sonochemistry - Volume 19, Issue 3, May 2012, Pages 440–451