Homogeneous catalysis of soybean oil transesterification via methylic and ethylic routes: Multivariate comparison

Karen Araújo Borges, André Luiz Squissato, Douglas Queiroz Santos, Waldomiro Borges Neto, Antônio Carlos Ferreira Batista, Tiago Almeida Silva, Andressa Tironi Vieira, Marcelo Firmino de Oliveira and Manuel Gonzalo Hernández-Terrones

Energy, 2014, vol. 67, issue C, 569-574

Abstract: An experiment to establish the best reaction conditions for the transesterification of soybean oil is described. We conducted the ethylic and methylic routes using two different protocols, and evaluated how the variables time, stirring, alcohol/oil molar ratio, catalyst (%), catalyst type, and temperature affected the process. The highest yield of biodiesel was obtained using the following conditions: ethylic route – t = 60 min, stirring: 100 rpm, ethanol/oil molar ratio = 12:1, catalyst relative to oil (%) = 0.2%, catalyst = potassium ethoxide, temperature = 35 °C; methylic route – t = 30 min, stirring: 100 rpm, methanol/oil molar ratio = 6:1, catalyst (%) = 0.2%, catalyst = KOH, temperature = 55 °C. We analyzed the acidity, moisture content, density at 20 °C, kinematic viscosity at 40 °C, oxidative stability, and carbon residue at the biodiesels obtained under optimal conditions. The results were consistent with the values allowed by the Brazilian ANP (Resolution 07/2008). We also conducted the physicochemical analysis of the soybean oil used as feedstock to produce biodiesel.

Keywords: Transesterification; Soybean oil; Optimization; Biodiesel (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:67:y:2014:i:c:p:569-574

DOI: 10.1016/j.energy.2014.02.012

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