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CFD Simulations of Allothermal Steam Gasification Process for Hydrogen Production

Author

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  • Tomasz Janoszek

    (Department of Extraction Technologies, Rockburst and Mining Support, Central Mining Institute, Plac Gwarków 1, 40-166 Katowice, Poland)

  • Wojciech Masny

    (Department of Extraction Technologies, Rockburst and Mining Support, Central Mining Institute, Plac Gwarków 1, 40-166 Katowice, Poland)

Abstract

The article presents an experimental laboratory setup used for the empirical determination of the gasification of coal samples in the form of solid rock, cut out in the form of a cylinder. An experimental laboratory set enabled a series of experiments carried out at 700 °C with steam as the gasification agent. The samples were prepared from the coal seam, the use of which can be planned in future underground and ground gasification experiments. The result of the conducted coal gasification process, using steam as the gasification agent, was the syngas, including hydrogen (H 2 ) with a concentration between 46% and 58%, carbon dioxide (CO 2 ) with a concentration between 13% and 17%, carbon monoxide (CO) with a concentration between 7% and 11.5%, and methane(CH 4 ) with a concentration between 9.6% and 20.1%.The results from the ex-situ experiments were compared with the results of numerical simulations using computational fluid dynamics (CFD) methods. A three-dimensional numerical model for the coal gasification process was developed using Ansys-Fluent software to simulate an ex-situ allothermal coal gasification experiment using low-moisture content hard coal under atmospheric conditions. In the numerical model, the mass exchange (flow of the gasification agent), the turbulence description model, heat exchange, the method of simulating the chemical reactions, and the method of mapping the porosity medium were included. Using the construction data of an experimental laboratory set, a numerical model was developed and its discretization (development of a numerical grid, based on which calculations are made) was carried out. Tip on the reactor, supply method, and parameters maintained during the gasification process were used to define the numerical model in the Ansys-Fluent code. A part of the data were supplemented on the basis of literature sources. Where necessary, the literature parameters were converted to the conditions corresponding to the experiment, which were carried out. After performing the calculations, the obtained results were compared with the available experimental data. The experimental and the simulated results were in good agreement, showing a similar tendency.

Suggested Citation

  • Tomasz Janoszek & Wojciech Masny, 2021. "CFD Simulations of Allothermal Steam Gasification Process for Hydrogen Production," Energies, MDPI, vol. 14(6), pages 1-28, March.
  • Handle: RePEc:gam:jeners:v:14:y:2021:i:6:p:1532-:d:514361
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    References listed on IDEAS

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    1. Dimitris Drikakis & Michael Frank & Gavin Tabor, 2019. "Multiscale Computational Fluid Dynamics," Energies, MDPI, vol. 12(17), pages 1-17, August.
    2. Xia Liu & Juntao Wei & Wei Huo & Guangsuo Yu, 2017. "Gasification under CO 2 –Steam Mixture: Kinetic Model Study Based on Shared Active Sites," Energies, MDPI, vol. 10(11), pages 1-10, November.
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    5. Michael Frank & Robin Kamenicky & Dimitris Drikakis & Lee Thomas & Hans Ledin & Terry Wood, 2019. "Multiphase Flow Effects in a Horizontal Oil and Gas Separator," Energies, MDPI, vol. 12(11), pages 1-16, June.
    6. Qitai Eri & Wenzhen Wu & Xinjun Zhao, 2017. "Numerical Investigation of the Air-Steam Biomass Gasification Process Based on Thermodynamic Equilibrium Model," Energies, MDPI, vol. 10(12), pages 1-19, December.
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    1. Milan Durdán & Marta Benková & Marek Laciak & Ján Kačur & Patrik Flegner, 2021. "Regression Models Utilization to the Underground Temperature Determination at Coal Energy Conversion," Energies, MDPI, vol. 14(17), pages 1-28, September.
    2. Zhizhen Zhang & Xiao Yang & Xiaoji Shang & Huai Yang, 2022. "A Thermal-Hydrological-Mechanical-Chemical Coupled Mathematical Model for Underground Coal Gasification with Random Fractures," Mathematics, MDPI, vol. 10(16), pages 1-21, August.
    3. Lele Feng & Maifan Dong & Yuxin Wu & Junping Gu, 2021. "Comparison of Tar Samples from Reaction Zone and Outlet in Ex-Situ Underground Coal Gasification Experiment," Energies, MDPI, vol. 14(24), pages 1-11, December.
    4. 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.
    5. Takuma Uehara & Makoto Asahara & Takeshi Miyasaka, 2024. "CO 2 -Free Hydrogen Production by Methane Pyrolysis Utilizing a Portion of the Produced Hydrogen for Combustion," Energies, MDPI, vol. 17(2), pages 1-20, January.
    6. Stefan Zelenak & Erika Skvarekova & Andrea Senova & Gabriel Wittenberger, 2021. "The Usage of UCG Technology as Alternative to Reach Low-Carbon Energy," Energies, MDPI, vol. 14(13), pages 1-15, June.

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