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

Author

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

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.

Suggested Citation

  • Borges, Karen Araújo & Squissato, André Luiz & Santos, Douglas Queiroz & Neto, Waldomiro Borges & Batista, Antônio Carlos Ferreira & Silva, Tiago Almeida & Vieira, Andressa Tironi & de Oliveira, Marce, 2014. "Homogeneous catalysis of soybean oil transesterification via methylic and ethylic routes: Multivariate comparison," Energy, Elsevier, vol. 67(C), pages 569-574.
    • Handle: RePEc:eee:energy:v:67:y:2014:i:c:p:569-574
    DOI: 10.1016/j.energy.2014.02.012
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    1. Gomes Souza, Mateus Cristian & Firmino de Oliveira, Marcelo & Vieira, Andressa Tironi & Marcio de Faria, Anízio & Ferreira Batista, Antônio Carlos, 2021. "Methylic and ethylic biodiesel production from crambe oil (Crambe abyssinica): New aspects for yield and oxidative stability," Renewable Energy, Elsevier, vol. 163(C), pages 368-374.
    2. Yesilyurt, Murat Kadir & Cesur, Cüneyt & Aslan, Volkan & Yilbasi, Zeki, 2020. "The production of biodiesel from safflower (Carthamus tinctorius L.) oil as a potential feedstock and its usage in compression ignition engine: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 119(C).
    3. Niu, Shengli & Zhou, Yan & Li, Hui & Lu, Chunmei & Liu, Li, 2015. "An investigation on the catalytic capability of the modified white mud after activation in transesterification and kinetic calculation," Energy, Elsevier, vol. 89(C), pages 982-989.

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