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Chlorine Release from Co-Pyrolysis of Corn Straw and Lignite in Nitrogen and Oxidative Pyrolysis

Author

Listed:
  • Jian Cheng

    (Nuclear Power Division, Harbin Electric Company Limited, Harbin 150028, China)

  • Min Xie

    (Hadian Power Equipment National Engineering Research Center Company, Harbin 150028, China)

  • Li Xu

    (Anhui Special Equipment Inspection Institute, Hefei 230051, China)

  • Lei Zhang

    (Department of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Xiaohan Ren

    (Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China)

Abstract

Elevated emissions of hydrogen chloride (HCl) from the combustion of biomass in utility boilers are a major issue because they can cause corrosion problems and deposit molten alkali chloride salts on boilers’ water tubes, resulting in further corrosion. Pyrolysis is a good pre-treatment for solving this problem. This work conducted pyrolysis and co-pyrolysis of pulverized corn straw and lignite coal in a horizontal muffle furnace, with compositions typical of power plant combustion effluents (5% O 2 , 15% CO 2 , 80% N 2 ) at different temperatures. Cl compounds were monitored in fuel, flue gas, and solid production of pyrolysis. The co-pyrolysis significantly affected Cl release from fuel. Cl release from corn straw into fuel gas was reduced during biomass co-pyrolysis with lignite. Co-pyrolysis had little influence on the release of organic Cl and KCl. Furthermore, at moderate-temperature pyrolysis, O 2 promoted HCl release, when compared with pyrolysis under a N 2 atmosphere.

Suggested Citation

  • Jian Cheng & Min Xie & Li Xu & Lei Zhang & Xiaohan Ren, 2021. "Chlorine Release from Co-Pyrolysis of Corn Straw and Lignite in Nitrogen and Oxidative Pyrolysis," Energies, MDPI, vol. 14(24), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8227-:d:696948
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    References listed on IDEAS

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