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Experimental Studies of the Effect of Design and Technological Solutions on the Intensification of an Underground Coal Gasification Process

Author

Listed:
  • Oleg Bazaluk

    (Belt and Road Initiative Institute for Chinese-European Studies (BRIICES), Guangdong University of Petrochemical Technology, Maoming 525000, China)

  • Vasyl Lozynskyi

    (Department of Mining Engineering and Education, Dnipro University of Technology, 49005 Dnipro, Ukraine)

  • Volodymyr Falshtynskyi

    (Department of Mining Engineering and Education, Dnipro University of Technology, 49005 Dnipro, Ukraine)

  • Pavlo Saik

    (Department of Mining Engineering and Education, Dnipro University of Technology, 49005 Dnipro, Ukraine)

  • Roman Dychkovskyi

    (Department of Mining Engineering and Education, Dnipro University of Technology, 49005 Dnipro, Ukraine)

  • Edgar Cabana

    (Institute of the Center of Renewable Energy and Energy Efficiency, Universidad Nacional de San Agustin de Arequipa, Arequipa 04000, Peru)

Abstract

This paper represents the results of experimental studies of physical modeling of the underground coal gasification process in terms of implementation of design and technological solutions aimed at intensification of a gasification process of thin coal seams. A series of experimental studies were performed in terms of a stand unit with the provided criteria of similarity to field conditions as well as kinetics of thermochemical processes occurring within a gas generator. Hard coal (high volatile bituminous coal) was selected as the raw material to be gasified, as that coal grade prevails in Ukrainian energy balance since it is represented by rather great reserves. Five blow types were tested during the research (air, air–steam, oxygen–steam, oxygen–enriched, and carbon dioxide and oxygen). As a result, the effect of tightness of a gas generator on the quantitative and qualitative parameters of coal gasification while varying the blow by reagents and changing the pressure in a reaction channel has been identified. Special attention was paid to the design solutions involving blow supply immediately into the combustion face of a gas generator. The experimental results demonstrate maximum efficiency of the applied gas generator design involving flexible pipelines and activator in the reaction channel and a blow direction onto the reaction channel face combined with blow stream reversing which will make it possible to improve caloricity of the generator gas up to 18% (i.e., from 8.4 to 12.8 MJ/m 3 depending upon a blow type). Consideration of the obtained results of physical modelling can be used with sufficient accuracy to establish modern enterprises based on the underground coal seam gasification; this will help develop more efficiently the substandard coal reserves to generate heat energy as well as power-producing and chemical raw material. The research conclusions can provide technical reference for developing a new generation of underground coal gasification technology.

Suggested Citation

  • Oleg Bazaluk & Vasyl Lozynskyi & Volodymyr Falshtynskyi & Pavlo Saik & Roman Dychkovskyi & Edgar Cabana, 2021. "Experimental Studies of the Effect of Design and Technological Solutions on the Intensification of an Underground Coal Gasification Process," Energies, MDPI, vol. 14(14), pages 1-18, July.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:14:p:4369-:d:597601
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    References listed on IDEAS

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    1. Hongtao Liu & Feng Chen & Yuanyuan Wang & Gang Liu & Hong Yao & Shuqin Liu, 2018. "Experimental Study of Reverse Underground Coal Gasification," Energies, MDPI, vol. 11(11), pages 1-13, October.
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    6. Oleg Bazaluk & Orest Slabyi & Vasyl Vekeryk & Andrii Velychkovych & Liubomyr Ropyak & Vasyl Lozynskyi, 2021. "A Technology of Hydrocarbon Fluid Production Intensification by Productive Stratum Drainage Zone Reaming," Energies, MDPI, vol. 14(12), pages 1-15, June.
    7. Oleg Bazaluk & Valerii Havrysh & Vitalii Nitsenko & Tomas Baležentis & Dalia Streimikiene & Elena A. Tarkhanova, 2020. "Assessment of Green Methanol Production Potential and Related Economic and Environmental Benefits: The Case of China," Energies, MDPI, vol. 13(12), pages 1-25, June.
    8. Oleg Bazaluk & Kateryna Sai & Vasyl Lozynskyi & Mykhailo Petlovanyi & Pavlo Saik, 2021. "Research into Dissociation Zones of Gas Hydrate Deposits with a Heterogeneous Structure in the Black Sea," Energies, MDPI, vol. 14(5), pages 1-24, March.
    9. Karol Kostúr & Marek Laciak & Milan Durdan, 2018. "Some Influences of Underground Coal Gasification on the Environment," Sustainability, MDPI, vol. 10(5), pages 1-31, May.
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    12. Mohammadreza Shahbazi & Mehdi Najafi & Mohammad Fatehi Marji, 2019. "On the mitigating environmental aspects of a vertical well in underground coal gasification method," Mitigation and Adaptation Strategies for Global Change, Springer, vol. 24(3), pages 373-398, March.
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    Cited by:

    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. Marek Laciak & Ján Kačur & Milan Durdán, 2022. "Modeling and Control of Energy Conversion during Underground Coal Gasification Process," Energies, MDPI, vol. 15(7), pages 1-6, March.

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