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Industrial-Scale Experimental Study on the Thermal Oxidation of Ventilation Air Methane and the Heat Recovery in a Multibed Thermal Flow-Reversal Reactor

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  • Bo Lan

    (Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China
    China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China)

  • You-Rong Li

    (Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400044, China)

  • Xu-Sheng Zhao

    (China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China)

  • Jian-Dong Kang

    (China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China)

Abstract

In the present work, an industrial-scale experiment on ventilation air methane (VAM) utilization by a multibed thermal flow-reversal reactor (TFRR) is conducted in China. The influence of the inlet flow rate, feed methane concentration, and cycle time on the temperature distribution of the bed and heat recovery efficiency are investigated. The methane conversion in the studied cases exceeds 97%. The results show that the methane concentration during self-maintained operation of the TFRR without heat recovery should not be less than 0.22 vol % when the inlet flow rate is 103,000 Nm 3 /h and the cycle time is 300 s. As the inlet flow rate decreases, the lower concentration limit of automatic thermal maintenance increases. The peak temperature of the bed approaches the inlet side as the feed methane concentration increases and the cycle time decreases. The heat recovery efficiency increases linearly with increasing inlet flow rate, rises parabolically with an increasing feed methane concentration, and decreases weakly with increasing cycle time.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:6:p:1578-:d:152807
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    References listed on IDEAS

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    1. Gosiewski, Krzysztof & Pawlaczyk, Anna & Jaschik, Manfred, 2015. "Energy recovery from ventilation air methane via reverse-flow reactors," Energy, Elsevier, vol. 92(P1), pages 13-23.
    2. 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.
    3. George Dalianis & Evanthia Nanaki & George Xydis & Efthimios Zervas, 2016. "New Aspects to Greenhouse Gas Mitigation Policies for Low Carbon Cities," Energies, MDPI, vol. 9(3), pages 1-16, February.
    4. Karakurt, Izzet & Aydin, Gokhan & Aydiner, Kerim, 2011. "Mine ventilation air methane as a sustainable energy source," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(2), pages 1042-1049, February.
    5. Wen Wang & Heng Wang & Huamin Li & Dongyin Li & Huaibin Li & Zhenhua Li, 2018. "Experimental Enrichment of Low-Concentration Ventilation Air Methane in Free Diffusion Conditions," Energies, MDPI, vol. 11(2), pages 1-11, February.
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    Cited by:

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