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Simulation Study of the Formation of Corrosive Gases in Coal Combustion in an Entrained Flow Reactor

Author

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  • Maximilian von Bohnstein

    (Institute for Energy Systems and Technology, Technische Universitat Darmstadt, 64289 Darmstadt, Germany)

  • Coskun Yildiz

    (Institute for Energy Systems and Technology, Technische Universitat Darmstadt, 64289 Darmstadt, Germany)

  • Lorenz Frigge

    (Institute for Energy Systems and Technology, Technische Universitat Darmstadt, 64289 Darmstadt, Germany)

  • Jochen Ströhle

    (Institute for Energy Systems and Technology, Technische Universitat Darmstadt, 64289 Darmstadt, Germany)

  • Bernd Epple

    (Institute for Energy Systems and Technology, Technische Universitat Darmstadt, 64289 Darmstadt, Germany)

Abstract

Gaseous sulfur species play a major role in high temperature corrosion of pulverized coal fired furnaces. The prediction of sulfur species concentrations by 3D-Computational Fluid Dynamics (CFD) simulation allows the identification of furnace wall regions that are exposed to corrosive gases, so that countermeasures against corrosion can be applied. In the present work, a model for the release of sulfur and chlorine species during coal combustion is presented. The model is based on the mineral matter transformation of sulfur and chlorine bearing minerals under coal combustion conditions. The model is appended to a detailed reaction mechanism for gaseous sulfur and chlorine species and hydrocarbon related reactions, as well as a global three-step mechanism for coal devolatilization, char combustion, and char gasification. Experiments in an entrained flow were carried out to validate the developed model. Three-dimensional numerical simulations of an entrained flow reactor were performed by CFD using the developed model. Calculated concentrations of SO 2 , H 2 S, COS, and HCl showed good agreement with the measurements. Hence, the developed model can be regarded as a reliable method for the prediction of corrosive sulfur and chlorine species in coal fired furnaces. Further improvement is needed in the prediction of some minor trace species.

Suggested Citation

  • Maximilian von Bohnstein & Coskun Yildiz & Lorenz Frigge & Jochen Ströhle & Bernd Epple, 2020. "Simulation Study of the Formation of Corrosive Gases in Coal Combustion in an Entrained Flow Reactor," Energies, MDPI, vol. 13(17), pages 1-24, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4523-:d:407125
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    References listed on IDEAS

    as
    1. Modlinski, Norbert & Hardy, Tomasz, 2017. "Development of high-temperature corrosion risk monitoring system in pulverized coal boilers based on reducing conditions identification and CFD simulations," Applied Energy, Elsevier, vol. 204(C), pages 1124-1137.
    2. Stroh, Alexander & Alobaid, Falah & Busch, Jan-Peter & Ströhle, Jochen & Epple, Bernd, 2015. "3-D numerical simulation for co-firing of torrefied biomass in a pulverized-fired 1 MWth combustion chamber," Energy, Elsevier, vol. 85(C), pages 105-116.
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    Cited by:

    1. Coskun Yildiz & Marcel Richter & Jochen Ströhle & Bernd Epple, 2023. "Release of Sulfur and Chlorine Gas Species during Combustion and Pyrolysis of Walnut Shells in an Entrained Flow Reactor," Energies, MDPI, vol. 16(15), pages 1-18, July.
    2. Tomasz Hardy & Amit Arora & Halina Pawlak-Kruczek & Wojciech Rafajłowicz & Jerzy Wietrzych & Łukasz Niedźwiecki & Vishwajeet & Krzysztof Mościcki, 2021. "Non-Destructive Diagnostic Methods for Fire-Side Corrosion Risk Assessment of Industrial Scale Boilers, Burning Low Quality Solid Biofuels—A Mini Review," Energies, MDPI, vol. 14(21), pages 1-15, November.
    3. Marek Sciazko & Aleksander Sobolewski, 2021. "Special Issue [Energies] “Clean Utilization and Conversion Technology of Coal”," Energies, MDPI, vol. 14(15), pages 1-3, July.

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