Statistical Study on Lipase-Catalyzed Synthesis of Biodiesel from Castor Oil using Response Surface Methodology
Publish place: 07th International Congress on Chemical Engineering
Publish Year: 1390
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ICHEC07_413
تاریخ نمایه سازی: 25 فروردین 1394
Abstract:
The production of fatty acid methyl esters (biodiesel) from crude castor oil using n-hexane as a solvent and commercial immobilized lipase, Nozozym 435, as catalyst was carried out in the present study. To this purpose, a response surface methodology (RSM), in the form of centralcomposite rotatable design (CCRD), was adopted considering the following variables: the amount of enzyme (2-6 wt/wt%), molar ratio of methanol to castor oil (3:1 to 7:1), temperature (30-50 ºC) and reaction time (12-48 h). The influence of these factors on the biodiesel production yield wasevaluated using second-order polynomial multiple regression model. Analysis of variance showeda high coefficient of determination value of 0.99, thus ensuring a satisfactory adjustment of theregression model with the experimental data. The empirical model predicted the maximum conversion of 97.9 % at the enzyme loading of 5 wt/wt%, methanol/oil molar ratio of 6:1, reaction temperature of 42 ºC, and reaction time of 39 h. The experimental conversion at optimum reaction conditions were obtained as 98.0%.
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Authors
Mohamad Hajar
Department of Chemical Engineering, AmirKabir University of Technology, Tehran, Iran
Soheila Shokrollahzadeh
Department of Chemical Technologies, Iranian Research Organization for Science and Technology, Tehran,
Farzaneh Vahabzadeh
Department of Chemical Engineering, AmirKabir University of Technology, Tehran, Iran
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