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Optimized Conversion of Waste Cooking Oil to Biodiesel Using Calcium Methoxide as Catalyst under Homogenizer System Conditions

Author

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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)

  • Shuhn-Shyurng Hou

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

Abstract

Although many types of heterogeneous catalysts have been applied to the transesterification reaction, some of them are unsuitable for industrial applications due to their high price and the extra preparation required to synthesize them. Calcium methoxide is a low cost, strong base with high catalytic activity and is thus commonly used in the biofuels synthesis process during the transesterification reaction. The objective of this study was to determine the optimized conversion in the transesterification reaction of waste cooking oil (WCO) for biodiesel production by using a homogenizer with a calcium methoxide catalyst. It was shown that the optimal reaction conditions are a methanol-to-oil molar ratio of 6:1, 4 wt % Ca(OCH 3 ) 2 , a reaction temperature of 65 °C, a rotation speed of 7000 rpm, and a reaction time of 90 min. The conversion rate under these conditions reached 90.2%. Ca(OCH 3 ) 2 thus has potential as a catalyst for industrial use. In addition, with a homogenizer system, the reaction time for synthesizing calcium methoxide catalyst can be reduced by half compared to that for conventional water-bath heating. In addition, the large amount of waste water required in the oil-water separation step can be reduced by using calcium methoxide instead of a homogeneous catalyst, significantly reducing manufacturing costs.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2622-:d:173242
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    References listed on IDEAS

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    1. 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.
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    5. Teo, Siow Hwa & Islam, Aminul & Yusaf, Talal & Taufiq-Yap, Yun Hin, 2014. "Transesterification of Nannochloropsis oculata microalga's oil to biodiesel using calcium methoxide catalyst," Energy, Elsevier, vol. 78(C), pages 63-71.
    6. George Anastopoulos & Ypatia Zannikou & Stamoulis Stournas & Stamatis Kalligeros, 2009. "Transesterification of Vegetable Oils with Ethanol and Characterization of the Key Fuel Properties of Ethyl Esters," Energies, MDPI, vol. 2(2), pages 1-15, June.
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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 & 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.
    3. 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.
    4. 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.
    5. 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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