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Improving Biodiesel Conversions from Blends of High- and Low-Acid-Value Waste Cooking Oils Using Sodium Methoxide as a Catalyst Based on a High Speed Homogenizer

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  • Ming-Chien Hsiao

    (Department of Environmental Engineering, Kun Shan University, Tainan 71070, Taiwan
    Green Energy Technology Research Center, Kun Shan University, Tainan 71070, Taiwan)

  • Jui-Yang Kuo

    (Department of Environmental Engineering, Kun Shan University, Tainan 71070, Taiwan)

  • Pei-Hsuan Hsieh

    (Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan)

  • Shuhn-Shyurng Hou

    (Green Energy Technology Research Center, Kun Shan University, Tainan 71070, Taiwan
    Department of Mechanical Engineering, Kun Shan University, Tainan 71070, Taiwan)

Abstract

Biodiesel is an environmentally friendly and sustainable fuel. However, the high price of the biodiesel produced from pure vegetable oil contributes to making it uncompetitive in the market. If we can make low cost oils such as waste cooking oil and high-acid-value oil available as resources, the cost of biodiesel production will be reduced significantly. However, these low cost oils cannot be used to produce biodiesel directly because they usually contain a large amount of free fatty acids. They have to undergo a preparatory procedure to lower the acid value to a specific value. The purpose of this study was to lower the amount of free fatty acids in waste cooking oils by blending high- and low-value oils at different ratios and to reduce the transesterification reaction time using a high speed homogenizer, which has the potential to easily enlarge the capacity scale. We used a high-acid-value oil to low-acid-value oil volume ratio of 4:6 as a control. A high conversion rate (97.1%) was achieved under the optimal reaction conditions: methanol-to-oil molar ratio, 9:1; amount of catalyst (CH 3 ONa) used, 0.75 wt %; reaction temperature, 65 °C; rotation speed, 8000 rpm; and reaction time, 8 min.

Suggested Citation

  • Ming-Chien Hsiao & Jui-Yang Kuo & Pei-Hsuan Hsieh & Shuhn-Shyurng Hou, 2018. "Improving Biodiesel Conversions from Blends of High- and Low-Acid-Value Waste Cooking Oils Using Sodium Methoxide as a Catalyst Based on a High Speed Homogenizer," Energies, MDPI, vol. 11(9), pages 1-11, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2298-:d:166973
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    References listed on IDEAS

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    Cited by:

    1. Marina Corral Bobadilla & Roberto Fernández Martínez & Rubén Lostado Lorza & Fátima Somovilla Gómez & Eliseo P. Vergara González, 2018. "Optimizing Biodiesel Production from Waste Cooking Oil Using Genetic Algorithm-Based Support Vector Machines," Energies, MDPI, vol. 11(11), pages 1-19, November.
    2. Ming-Chien Hsiao & Li-Wen Chang & Shuhn-Shyurng Hou, 2019. "Study of Solid Calcium Diglyceroxide for Biodiesel Production from Waste Cooking Oil Using a High Speed Homogenizer," Energies, MDPI, vol. 12(17), pages 1-11, August.
    3. Ming-Chien Hsiao & Peir-Horng Liao & Nguyen Vu Lan & Shuhn-Shyurng Hou, 2021. "Enhancement of Biodiesel Production from High-Acid-Value Waste Cooking Oil via a Microwave Reactor Using a Homogeneous Alkaline Catalyst," Energies, MDPI, vol. 14(2), pages 1-11, January.
    4. Ming-Chien Hsiao & Shuhn-Shyurng Hou & Jui-Yang Kuo & Pei-Hsuan Hsieh, 2018. "Optimized Conversion of Waste Cooking Oil to Biodiesel Using Calcium Methoxide as Catalyst under Homogenizer System Conditions," Energies, MDPI, vol. 11(10), pages 1-12, October.
    5. Ming-Chien Hsiao & Peir-Horng Liao & Kuo-Chou Yang & Nguyen Vu Lan & Shuhn-Shyurng Hou, 2022. "Enhanced Biodiesel Synthesis via a Homogenizer-Assisted Two-Stage Conversion Process Using Waste Edible Oil as Feedstock," Energies, MDPI, vol. 15(23), pages 1-15, November.
    6. Sri Kurniati & Sudjito Soeparman & Sudarminto Setyo Yuwono & Lukman Hakim & Sudirman Syam, 2019. "A Novel Process for Production of Calophyllum Inophyllum Biodiesel with Electromagnetic Induction," Energies, MDPI, vol. 12(3), pages 1-20, January.
    7. Deeba, Farha & Kumar, Bijender & Arora, Neha & Singh, Sauraj & Kumar, Anuj & Han, Sung Soo & Negi, Yuvraj S., 2020. "Novel bio-based solid acid catalyst derived from waste yeast residue for biodiesel production," Renewable Energy, Elsevier, vol. 159(C), pages 127-139.
    8. Ming-Chien Hsiao & Wei-Ting Lin & Wei-Cheng Chiu & Shuhn-Shyurng Hou, 2021. "Two-Stage Biodiesel Synthesis from Used Cooking Oil with a High Acid Value via an Ultrasound-Assisted Method," Energies, MDPI, vol. 14(12), pages 1-14, June.

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