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Luisa López, BSc

Jenny Paola Bocanegra, BSc

Dionisio Malagón-Romero, PhD

Abstract

Evaluating different vegetable oils in order to obtain biofuels, reducing production costs, increasing reaction yield, avoiding raw materials considered as foods and reducing environmental pollution have become a global strategy and trend for the production of biodiesel. In this study, the production of biodiesel from waste cooking oil (WCO) was analyzed using alkali catalyzer. Three molar ratios of methanol: oil were evaluated: 6:1, 9:1 and 12:1, and two catalyzers KOH and NaOH at percentage of 1% and 2% respectively were studied. A factorial design of experiments was performed in duplicate. The temperature was fixed at 60°C and reaction time of 2 hours. Determination of methyl esters, mono, di and triglycerides by performed via gas chromatography. The best conditions for both NaOH and KOH as catalysts were obtained when the percentage of the catalyst was 1%, and the alcohol: oil molar ratio was 12:1. Under these conditions a conversión of 64,1%, a yield of 98% and a methyl ester of 99,1% were reached for NaOH catalyzer. For KOH, the conversion was 63,2%, the yield 88% and the percentage of methyl esters about 98,4%. The results of this study reveal high yield of the reaction for WCO as raw material. Consequently its implementation at industrial scale will be depended of the economic evaluation.

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Keywords

Biodiesel, transesterification, wasted oil, alkaline catalyst

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How to Cite
López, L., Bocanegra, J., & Malagón-Romero, D. (2015). Production of biodiesel from waste cooking oil by transesterification. Ingenieria Y Universidad, 19(1), 155-172. https://doi.org/10.11144/Javeriana.iyu19-1.odba
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