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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 10, 2014
Accepted May 12, 2015

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Optimization of biodiesel production from a calcium methoxide catalyst using a statistical model

Warakom Suwanthai¹ Vittaya Punsuvon^{1 2†} Pilanee Vaithanomsat³

¹Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand ²Center of Excellence-Oil Palm, Kasetsart University, Bangkok 10900, Thailand ³***Kasetsart Agricultural and Agro-Industrial Product Improvement Institute, Kasetsart University, Bangkok 10900, Thailand

fscivit@ku.ac.th

Korean Journal of Chemical Engineering, January 2016, 33(1), 90-98(9), 10.1007/s11814-015-0096-9

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Abstract

Calcium methoxide catalyst was synthesized from quick lime and methanol, and further characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), and energy dispersive X-ray spectroscopy (EDX). Response surface methodology (RSM) with a 5-level-3-factor central composite was applied for the calcium methoxide catalyzed transesterification of refined palm oil to investigate the effect of experimental factors on the methyl ester yield. A quadratic model with an analysis of variance (ANOVA) obtained from RSM is suggested for the prediction of methyl ester yield, and reveals that 95.99% of the observed variation is explained by the model. The optimum conditions obtained from RSM were 2.71 wt% of catalyst concentration, 11.5 : 1 methanol-to-oil molar ratio, and 175 min of reaction time. Under these conditions, the produced biodiesel met the standard requirements for methyl ester yield.

Keywords

Biodiesel Calcium Methoxide Transesterification Response Surface Methodology Refined Palm Oil

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