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Acidity reduction of enzymatic biodiesel using alkaline washing

Author

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  • Uliana, Nilva R.
  • Polloni, André
  • Paliga, Marshall
  • Veneral, Josamaique G.
  • Quadri, Marintho B.
  • Oliveira, J. Vladimir

Abstract

The aim of this communication is to report the reduction of biodiesel acidity by wet washing using aqueous/methanol NaOH solutions. For this purpose, some assays were carried out, varying temperature, methanol concentration, molar ratio of NaOH to FFA and the amount of NaOH solution, with results expressed in terms of final acidity and process yield. It is shown that 35 °C, 1 wt% of methanol, 1 NaOH:FFA molar ratio (i.e., 1 eqv, the stoichiometric relation), and 3 wt% of base solution in relation to crude biodiesel, resulting in a final FFA content of 0.19 wt% and around 96% of product yield.

Suggested Citation

  • Uliana, Nilva R. & Polloni, André & Paliga, Marshall & Veneral, Josamaique G. & Quadri, Marintho B. & Oliveira, J. Vladimir, 2017. "Acidity reduction of enzymatic biodiesel using alkaline washing," Renewable Energy, Elsevier, vol. 113(C), pages 393-396.
    • Handle: RePEc:eee:renene:v:113:y:2017:i:c:p:393-396
    DOI: 10.1016/j.renene.2017.06.001
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    References listed on IDEAS

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    1. Stojković, Ivan J. & Stamenković, Olivera S. & Povrenović, Dragan S. & Veljković, Vlada B., 2014. "Purification technologies for crude biodiesel obtained by alkali-catalyzed transesterification," Renewable and Sustainable Energy Reviews, Elsevier, vol. 32(C), pages 1-15.
    2. Atadashi, I.M. & Aroua, M.K. & Aziz, A.R. Abdul & Sulaiman, N.M.N., 2011. "Refining technologies for the purification of crude biodiesel," Applied Energy, Elsevier, vol. 88(12), pages 4239-4251.
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    4. Pourzolfaghar, Hamed & Abnisa, Faisal & Daud, Wan Mohd Ashri Wan & Aroua, Mohamed Kheireddine, 2016. "A review of the enzymatic hydroesterification process for biodiesel production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 61(C), pages 245-257.
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    6. Veljković, Vlada B. & Banković-Ilić, Ivana B. & Stamenković, Olivera S., 2015. "Purification of crude biodiesel obtained by heterogeneously-catalyzed transesterification," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 500-516.
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    3. Sokač, Tea & Gojun, Martin & Tušek, Ana Jurinjak & Šalić, Anita & Zelić, Bruno, 2020. "Purification of biodiesel produced by lipase catalysed transesterification by ultrafiltration: Selection of membranes and analysis of membrane blocking mechanisms," Renewable Energy, Elsevier, vol. 159(C), pages 642-651.

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