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A Novel PETG Microchannel Reactor for Microwave-Powered Biodiesel Production

Author

Listed:
  • Koguleshun Subramaniam

    (Carbon Neutrality Research Group, University of Southampton Malaysia, Iskandar Puteri 79100, Malaysia)

  • Kang Yao Wong

    (Carbon Neutrality Research Group, University of Southampton Malaysia, Iskandar Puteri 79100, Malaysia)

  • Kok Hoe Wong

    (Carbon Neutrality Research Group, University of Southampton Malaysia, Iskandar Puteri 79100, Malaysia)

  • Cheng Tung Chong

    (China-UK Low Carbon College, Shanghai Jiao Tong University, Lingang, Shanghai 201306, China)

  • Jo-Han Ng

    (Carbon Neutrality Research Group, University of Southampton Malaysia, Iskandar Puteri 79100, Malaysia)

Abstract

Biodiesel stands at the forefront as a replacement for fossil diesel in compression ignition engines, particularly in the transportation sector where diesel engines are the primary movers. However, biodiesel production is hampered by poor heat and mass transfer during the transesterification reaction, leading to long production times and high costs due to inefficient energy utilisation. This study targets heat and mass transfer issues during the production of biodiesel via a synergic approach that combines microwave-assisted heating and microfluidics via a polyethylene terephthalate glycol (PETG) microchannel reactor. The transesterification reaction of palm oil and methanol was investigated using a full factorial design of experiments (DOE) method. Biodiesel yield was quantified via gas chromatographic analysis, and the results were optimised using statistical analysis. Optical analysis of slug quantification within the microchannel revealed that small slugs, smaller than 1 mm, accelerated the transesterification reaction. The composite-optimised experimental results, aimed at minimising energy costs and environmental impacts while maximising fatty acid methyl ester (FAME) yield, indicate a reaction temperature of 50 °C, a catalyst loading of 1.0 wt.%, and a 3:1 methanol to oil molar ratio. Regression analysis revealed that the reaction temperature was statistically insignificant when utilising the PETG microchannel reactor. This key finding positively impacts biodiesel production as it relates to significantly reduced energy intensity, costs, and emissions. Overall, this research work paves a pathway toward an energy-efficient and sub-minute rapid transesterification reaction, highlighting the effectiveness of microwave heat delivery and effects of microfluidics via the PETG microchannel reactor in overcoming heat and mass transfer barriers in biodiesel production.

Suggested Citation

  • Koguleshun Subramaniam & Kang Yao Wong & Kok Hoe Wong & Cheng Tung Chong & Jo-Han Ng, 2024. "A Novel PETG Microchannel Reactor for Microwave-Powered Biodiesel Production," Energies, MDPI, vol. 17(9), pages 1-22, April.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2103-:d:1384823
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    References listed on IDEAS

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    1. Afiq Mohd Laziz & Chong Yang Chuah & Jens Denecke & Muhammad Roil Bilad & Ku Zilati Ku Shaari, 2023. "Investigation of Mass-Transfer Performance for Biodiesel Reaction in Microchannel Reactor using Volume-of-Fluid with Species-Transport Model," Sustainability, MDPI, vol. 15(7), pages 1-14, April.
    2. Ahmad, Tanweer & Danish, Mohammed & Kale, Pradeep & Geremew, Belete & Adeloju, Samuel B. & Nizami, Maniruddin & Ayoub, Muhammad, 2019. "Optimization of process variables for biodiesel production by transesterification of flaxseed oil and produced biodiesel characterizations," Renewable Energy, Elsevier, vol. 139(C), pages 1272-1280.
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    4. García-Martín, Juan Francisco & Barrios, Carmen C. & Alés-Álvarez, Francisco-Javier & Dominguez-Sáez, Aida & Alvarez-Mateos, Paloma, 2018. "Biodiesel production from waste cooking oil in an oscillatory flow reactor. Performance as a fuel on a TDI diesel engine," Renewable Energy, Elsevier, vol. 125(C), pages 546-556.
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    Cited by:

    1. Subramaniam, Koguleshun & Wong, Kang Yao & Wong, Kok Hoe & Chong, Cheng Tung & Chiong, Meng Choung & Ng, Jo-Han, 2024. "A synergic approach to intensify biodiesel transesterification through microfluidics and microwave irradiation," Energy, Elsevier, vol. 313(C).

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