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Reaction Molecular Dynamics Study on the Mechanism of Alkali Metal Sodium at the Initial Stage of Naphthalene Pyrolysis Evolution

Author

Listed:
  • Di Wu

    (School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China
    Jiamusi College, Heilongiang University of Traditional Chinese Medicine, Jiamusi 154007, China)

  • Heming Dong

    (Institute of Combustion Engineering, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Jiyi Luan

    (School of Materials Science and Engineering, Jiamusi University, Jiamusi 154007, China)

  • Qian Du

    (Institute of Combustion Engineering, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Jianmin Gao

    (Institute of Combustion Engineering, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Dongdong Feng

    (Institute of Combustion Engineering, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Yu Zhang

    (Institute of Combustion Engineering, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Ziqi Zhao

    (Institute of Combustion Engineering, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

  • Dun Li

    (Institute of Combustion Engineering, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

Abstract

In order to study the role of metal sodium in the spray pyrolysis of biomass tar, this paper designs a sodium-containing naphthalene pyrolysis system (NSS) and a pure naphthalene pyrolysis system (PNS) using naphthalene as the carbon source and sodium chloride as the sodium metal donor for comparison. This enables an exploration of the effect of sodium on the initial nucleation of carbon fumes formed by naphthalene pyrolysis using reaction molecular dynamics (ReaxFF MD). The simulation results show that NSS undergoes pyrolysis reactions earlier and faster than PNS at the same temperature. Simulated at 3250 K temperature for 2 ns, the naphthalene pyrolysis consumption rate of the NSS was faster than that of the PNS, and the addition of sodium atoms during the condensation process provided more active sites and accelerated the condensation of macromolecular products. Moreover, Na + and carbon rings form a Na + -π structure to promote the bending of graphite lamellae to facilitate the formation of carbon nuclei. Molecular dynamics simulations were used to simulate the formation of carbon nuclei during the initial stage of naphthalene pyrolysis, revealing that the mechanism of sodium salt catalyzed the acceleration of organic matter pyrolysis from a microscopic visualization perspective.

Suggested Citation

  • Di Wu & Heming Dong & Jiyi Luan & Qian Du & Jianmin Gao & Dongdong Feng & Yu Zhang & Ziqi Zhao & Dun Li, 2023. "Reaction Molecular Dynamics Study on the Mechanism of Alkali Metal Sodium at the Initial Stage of Naphthalene Pyrolysis Evolution," Energies, MDPI, vol. 16(17), pages 1-19, August.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:17:p:6186-:d:1225361
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    2. Li, Chunshan & Suzuki, Kenzi, 2009. "Tar property, analysis, reforming mechanism and model for biomass gasification--An overview," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(3), pages 594-604, April.
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