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Fuel Characteristics of Biodiesel Produced from a High-Acid Oil from Soybean Soapstock by Supercritical-Methanol Transesterification

Author

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  • Cherng-Yuan Lin

    (Department of Marine Engineering, National Taiwan Ocean University, Keelung 202, Taiwan)

  • Yi-Wei Lin

    (Department of Marine Engineering, National Taiwan Ocean University, Keelung 202, Taiwan)

Abstract

A supercritical methanol transesterification method was applied to produce biodiesel from the high-acid oil of soybean soapstock. The fuel properties of biodiesel produced with various molar ratios of methanol to raw oil were analyzed and compared in this experimental study. Oleic acid (C18:1), linoleic acid (C18:2), and palmitic acid (C16:0) were the three main compounds in the high-acid oil-biodiesel. The saturated fatty acid content of the high-acid oil increased significantly due to the supercritical-methanol transesterification reaction. The fuel characteristics of the resulting high-acid oil, including the specific gravity and kinematic viscosity, were also greatly improved. The saturated fatty acid content of the biodiesel produced from the high-acid oil was higher than that of biodiesel from waste cooking oil produced by the subcritical transesterification using a strongly alkaline catalyst. The high-acid oil-biodiesel that was produced with a molar ratio of methanol to raw oil of 42 had the best fuel properties, including a higher distillation temperature and cetane index and a lower kinematic viscosity and water content, among the biodiesels with different molar ratios.

Suggested Citation

  • Cherng-Yuan Lin & Yi-Wei Lin, 2012. "Fuel Characteristics of Biodiesel Produced from a High-Acid Oil from Soybean Soapstock by Supercritical-Methanol Transesterification," Energies, MDPI, vol. 5(7), pages 1-11, July.
    • Handle: RePEc:gam:jeners:v:5:y:2012:i:7:p:2370-2380:d:18776
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    References listed on IDEAS

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    1. Lin, Cherng-Yuan & Huang, Tsan-Huang, 2012. "Cost-benefit evaluation of using biodiesel as an alternative fuel for fishing boats in Taiwan," Marine Policy, Elsevier, vol. 36(1), pages 103-107, January.
    2. Park, Ji-Yeon & Wang, Zhong-Ming & Kim, Deog-Keun & Lee, Jin-Suk, 2010. "Effects of water on the esterification of free fatty acids by acid catalysts," Renewable Energy, Elsevier, vol. 35(3), pages 614-618.
    3. Ramadhas, A.S. & Jayaraj, S. & Muraleedharan, C. & Padmakumari, K., 2006. "Artificial neural networks used for the prediction of the cetane number of biodiesel," Renewable Energy, Elsevier, vol. 31(15), pages 2524-2533.
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    2. Francisco Anguebes-Franseschi & Mohamed Abatal & Ali Bassam & Mauricio A. Escalante Soberanis & Oscar May Tzuc & Lauro Bucio-Galindo & Atl Victor Cordova Quiroz & Claudia Alejandra Aguilar Ucan & Migu, 2018. "Esterification Optimization of Crude African Palm Olein Using Response Surface Methodology and Heterogeneous Acid Catalysis," Energies, MDPI, vol. 11(1), pages 1-15, January.
    3. Bobde, Kiran & Momin, Huda & Bhattacharjee, Ashish & Aikat, Kaustav, 2019. "Energy assessment and enhancement of the lipid yield of indigenous Chlorella sp. KA-24NITD using Taguchi approach," Renewable Energy, Elsevier, vol. 131(C), pages 1226-1235.
    4. Lin, Cherng-Yuan & Lu, Cherie, 2021. "Development perspectives of promising lignocellulose feedstocks for production of advanced generation biofuels: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 136(C).
    5. de Aguiar, Viviane Marques & de Souza, Andrea Luzia F. & Galdino, Fernanda S. & da Silva, Michelle Martha C. & Teixeira, Viviane Gomes & Lachter, Elizabeth R., 2017. "Sulfonated poly(divinylbenzene) and poly(styrene-divinylbenzene) as catalysts for esterification of fatty acids," Renewable Energy, Elsevier, vol. 114(PB), pages 725-732.

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