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The Release and Reduction of Mercury from Solid Fuels through Thermal Treatment Prior to Combustion

Author

Listed:
  • Edyta Misztal

    (Institute of Energy and Fuel Processing Technology (ITPE), Zamkowa 1, 41-803 Zabrze, Poland)

  • Tomasz Chmielniak

    (Institute of Energy and Fuel Processing Technology (ITPE), Zamkowa 1, 41-803 Zabrze, Poland
    Department of Thermal and Fluid Flow Machines, Faculty of Energy and Fuels, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland)

  • Izabela Mazur

    (Institute of Energy and Fuel Processing Technology (ITPE), Zamkowa 1, 41-803 Zabrze, Poland)

  • Marcin Sajdak

    (Department of Air Protection, Faculty of Energy and Environmental Engineering, Silesian University of Technology in Gliwice, 44-100 Gliwice, Poland
    School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK)

Abstract

The main source of mercury (Hg) anthropogenic emissions is the combustion of hard and lignite coal in power plants. Reduction of Hg emissions from coal-based power production systems involves Hg removal from the fuel before combustion/gasification by thermal treatment (i.e., low-temperature pyrolysis). Herein, we present the results of laboratory and bench-scale studies on Hg removal from coal via thermal fuel treatment. The influence of the process temperature and coal residence time in the reaction zone on Hg removal efficiency and fuel parameters is studied. The properties of the process products are analyzed as follows: proximate and ultimate analysis for solids as well as H 2, N 2, CO, CO 2, CH 4 , organic compounds C2–C5, density, and HHV for gaseous. The results show a substantial reduction of Hg in the fuel using a low-temperature pyrolysis process. At moderate pyrolysis temperature provided Hg removal efficiencies of up to 50% for hard coal and over 90% for lignite, with a moderate decrease in the chemical enthalpy of the fuel.

Suggested Citation

  • Edyta Misztal & Tomasz Chmielniak & Izabela Mazur & Marcin Sajdak, 2022. "The Release and Reduction of Mercury from Solid Fuels through Thermal Treatment Prior to Combustion," Energies, MDPI, vol. 15(21), pages 1-12, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7987-:d:955161
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    Citations

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    Cited by:

    1. Tadeusz Dziok, 2023. "Production of Low-Mercury Solid Fuel by Mild Pyrolysis Process," Energies, MDPI, vol. 16(7), pages 1-12, March.
    2. Marcelina Bury & Tadeusz Dziok & Karel Borovec & Piotr Burmistrz, 2023. "Influence of RDF Composition on Mercury Release during Thermal Pretreatment," Energies, MDPI, vol. 16(2), pages 1-13, January.

    More about this item

    Keywords

    coal; pyrolysis; mercury removal;
    All these keywords.

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