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Pyrolysis Mechanism of Victorian Brown Coal Under Microwave and Conventional Conditions for Hydrogen-Rich Gas Production

Author

Listed:
  • Quan Sun

    (School of Engineering, University of Newcastle, Callaghan, NSW 2308, Australia)

  • Salman Khoshk Rish

    (School of Engineering, University of Newcastle, Callaghan, NSW 2308, Australia)

  • Jianglong Yu

    (Suzhou Industrial Park Monash Research Institute of Science and Technology, Southeast University–Monash University Joint Graduate School, Suzhou 215000, China)

  • Arash Tahmasebi

    (School of Engineering, University of Newcastle, Callaghan, NSW 2308, Australia)

Abstract

Fast microwave pyrolysis technology can effectively convert brown coal into hydrogen-rich syngas. However, the unique pyrolysis behaviour of brown coal under microwave conditions is not fully understood in comparison with conventional pyrolysis. This study used Victorian brown coal as a raw material to conduct pyrolysis experiments under conventional and microwave heating methods. The results demonstrate that the microwave-assisted pyrolysis of Victorian brown coal can selectively crack polar functional groups, enhancing H 2 and CO production via radical-driven secondary reactions and gasification, while conventional heating favours the formation of tar containing phenols and fewer aromatic compounds. The result is a high-quality syngas (75.03 vol.%) with a hydrogen yield of 10.28 (mmol Gas/g Coal (daf)) at 700 °C under microwave heating, offering a scalable route for valorising low-rank coals.

Suggested Citation

  • Quan Sun & Salman Khoshk Rish & Jianglong Yu & Arash Tahmasebi, 2025. "Pyrolysis Mechanism of Victorian Brown Coal Under Microwave and Conventional Conditions for Hydrogen-Rich Gas Production," Energies, MDPI, vol. 18(11), pages 1-26, May.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:11:p:2863-:d:1668263
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