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Vacuum Exhaust Process in Pilot-Scale Vacuum Pressure Swing Adsorption for Coal Mine Ventilation Air Methane Enrichment

Author

Listed:
  • Xiong Yang

    (School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Higher Institution Engineering Research Center of Energy Conservation and Environmental Protection, Beijing 100083, China)

  • Yingshu Liu

    (School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Higher Institution Engineering Research Center of Energy Conservation and Environmental Protection, Beijing 100083, China)

  • Ziyi Li

    (School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Beijing Higher Institution Engineering Research Center of Energy Conservation and Environmental Protection, Beijing 100083, China)

  • Chuanzhao Zhang

    (College of Biochemical Engineering, Beijing Union University, Beijing 100023, China)

  • Yi Xing

    (School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China)

Abstract

Recovery and treatment of methane from coal mine ventilation air methane (VAM) with cost-effective technologies have been an ongoing challenge due to low methane concentrations. In this study, a type of coconut shell-based active carbon was employed to enrich VAM with a three-bed vacuum pressure swing adsorption unit. A new vacuum exhaust step for the VPSA process was introduced. The results show that the vacuum exhaust step can increase the methane concentration of the product without changing adsorption and desorption pressure. Under laboratory conditions, the concentration of product increased from 0.4% to 0.69% as the vacuum exhaust ratio increased from 0 to 3.1 when the feed gas concentration was 0.2%. A 500 m³/h pilot-scale test system for VAM enrichment was built rendering good correlation with the laboratory results in terms of the vacuum exhaust step. By using a two-stage three-bed separation unit, the VAM was enriched from 0.2% to over 1.2%.

Suggested Citation

  • Xiong Yang & Yingshu Liu & Ziyi Li & Chuanzhao Zhang & Yi Xing, 2018. "Vacuum Exhaust Process in Pilot-Scale Vacuum Pressure Swing Adsorption for Coal Mine Ventilation Air Methane Enrichment," Energies, MDPI, vol. 11(5), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1030-:d:142856
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    References listed on IDEAS

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    1. Su, Shi & Yu, Xinxiang, 2015. "A 25 kWe low concentration methane catalytic combustion gas turbine prototype unit," Energy, Elsevier, vol. 79(C), pages 428-438.
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    Cited by:

    1. Marek Borowski & Piotr Życzkowski & Rafał Łuczak & Michał Karch & Jianwei Cheng, 2019. "Tests to Ensure the Minimum Methane Concentration for Gas Engines to Limit Atmospheric Emissions," Energies, MDPI, vol. 13(1), pages 1-15, December.
    2. Magdalena Tutak & Jarosław Brodny, 2019. "Forecasting Methane Emissions from Hard Coal Mines Including the Methane Drainage Process," Energies, MDPI, vol. 12(20), pages 1-28, October.
    3. Yongkang Yang & Qiaoyi Du & Chenlong Wang & Yu Bai, 2020. "Research on the Method of Methane Emission Prediction Using Improved Grey Radial Basis Function Neural Network Model," Energies, MDPI, vol. 13(22), pages 1-15, November.
    4. Bo Lan & You-Rong Li & Xu-Sheng Zhao & Jian-Dong Kang, 2018. "Industrial-Scale Experimental Study on the Thermal Oxidation of Ventilation Air Methane and the Heat Recovery in a Multibed Thermal Flow-Reversal Reactor," Energies, MDPI, vol. 11(6), pages 1-13, June.

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