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Impact of Chemistry–Turbulence Interaction Modeling Approach on the CFD Simulations of Entrained Flow Coal Gasification

Author

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  • Jakub Mularski

    (Department of Mechanics, Machines, Devices and Energy Processes, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland)

  • Norbert Modliński

    (Department of Mechanics, Machines, Devices and Energy Processes, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland)

Abstract

This paper examines the impact of different chemistry–turbulence interaction approaches on the accuracy of simulations of coal gasification in entrained flow reactors. Infinitely fast chemistry is compared with the eddy dissipation concept considering the influence of turbulence on chemical reactions. Additionally, ideal plug flow reactor study and perfectly stirred reactor study are carried out to estimate the accuracy of chosen simplified chemical kinetic schemes in comparison with two detailed mechanisms. The most accurate global approach and the detailed one are further implemented in the computational fluid dynamics (CFD) code. Special attention is paid to the water–gas shift reaction, which is found to have the key impact on the final gas composition. Three different reactors are examined: a pilot-scale Mitsubishi Heavy Industries reactor, a laboratory-scale reactor at Brigham Young University and a Conoco-Philips E-gas reactor. The aim of this research was to assess the impact of gas phase reaction model accuracy on simulations of the entrained flow gasification process. The investigation covers the following issues: impact of the choice of gas phase kinetic reactions mechanism as well as influence of the turbulence–chemistry interaction model. The advanced turbulence–chemistry models with the complex kinetic mechanisms showed the best agreement with the experimental data.

Suggested Citation

  • Jakub Mularski & Norbert Modliński, 2020. "Impact of Chemistry–Turbulence Interaction Modeling Approach on the CFD Simulations of Entrained Flow Coal Gasification," Energies, MDPI, vol. 13(23), pages 1-25, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6467-:d:458141
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    References listed on IDEAS

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    1. Jakub Mularski & Norbert Modliński, 2021. "Entrained-Flow Coal Gasification Process Simulation with the Emphasis on Empirical Char Conversion Models Optimization Procedure," Energies, MDPI, vol. 14(6), pages 1-20, March.
    2. Ziemowit Malecha, 2022. "Turbulence and Fluid Mechanics," Energies, MDPI, vol. 15(3), pages 1-4, February.
    3. Krzysztof M. Czajka, 2021. "Gasification of Coal by CO 2 : The Impact of the Heat Transfer Limitation on the Progress, Reaction Rate and Kinetics of the Process," Energies, MDPI, vol. 14(17), pages 1-22, September.
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    5. Simone Ferrari & Riccardo Rossi & Annalisa Di Bernardino, 2022. "A Review of Laboratory and Numerical Techniques to Simulate Turbulent Flows," Energies, MDPI, vol. 15(20), pages 1-56, October.

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