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Clean coal technology—Study on the pilot project experiment of underground coal gasification

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  • Yang, Lanhe
  • Liang, Jie
  • Yu, Li

Abstract

In this paper, the gasification conditions, the gasifier structure, the measuring system and the gasification rationale of a pilot project experiment of underground coal gasification (UCG) in the Liuzhuang Colliery, Tangshan, are illustrated. The technique of two-phase underground coal gasification is proposed. The detection of the moving speed and the length of the gasification working face is made using radon probing technology. An analysis of the experiment results indicates that the output of air gas is 3000 m3/h with a heating value of about 4.18 MJ/m3, while the output of water gas is 2000 m3/h with a heating value of over 11.00 MJ/m3, of which H2 content is above 40% with a maximum of 71.68%. The cyclical time of two-phase underground gasification is 16 h, with 8 h for each phase. This prolongs the time when the high-heating value gas is produced. The moving speed of the gasification working face in two alternative gasifiers is identified, i.e. 0.204 and 0.487 m/d, respectively. The success of the pilot project experiment of the underground gasification reveals the strides that have been made toward the commercialization of the UCG in China. It also further justifies the reasonability and feasibility of the new technology of long channel, big section, two-phase underground gasification. A conclusion is also drawn that the technology of the pilot project experiment can be popularized in old and discarded coal mines.

Suggested Citation

  • Yang, Lanhe & Liang, Jie & Yu, Li, 2003. "Clean coal technology—Study on the pilot project experiment of underground coal gasification," Energy, Elsevier, vol. 28(14), pages 1445-1460.
    • Handle: RePEc:eee:energy:v:28:y:2003:i:14:p:1445-1460
    DOI: 10.1016/S0360-5442(03)00125-7
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    1. Laciak, Marek & Kostúr, Karol & Durdán, Milan & Kačur, Ján & Flegner, Patrik, 2016. "The analysis of the underground coal gasification in experimental equipment," Energy, Elsevier, vol. 114(C), pages 332-343.
    2. Javed, Syed Bilal & Uppal, Ali Arshad & Samar, Raza & Bhatti, Aamer Iqbal, 2021. "Design and implementation of multi-variable H∞ robust control for the underground coal gasification project Thar," Energy, Elsevier, vol. 216(C).
    3. Su, Fa-qiang & Itakura, Ken-ichi & Deguchi, Gota & Ohga, Koutarou, 2017. "Monitoring of coal fracturing in underground coal gasification by acoustic emission techniques," Applied Energy, Elsevier, vol. 189(C), pages 142-156.
    4. Prabu, V., 2015. "Integration of in-situ CO2-oxy coal gasification with advanced power generating systems performing in a chemical looping approach of clean combustion," Applied Energy, Elsevier, vol. 140(C), pages 1-13.
    5. Khadse, Anil & Qayyumi, Mohammed & Mahajani, Sanjay & Aghalayam, Preeti, 2007. "Underground coal gasification: A new clean coal utilization technique for India," Energy, Elsevier, vol. 32(11), pages 2061-2071.
    6. Javed, Syed Bilal & Uppal, Ali Arshad & Bhatti, Aamer Iqbal & Samar, Raza, 2019. "Prediction and parametric analysis of cavity growth for the underground coal gasification project Thar," Energy, Elsevier, vol. 172(C), pages 1277-1290.
    7. Krzysztof Skrzypkowski & Krzysztof Zagórski & Anna Zagórska, 2021. "Determination of the Extent of the Rock Destruction Zones around a Gasification Channel on the Basis of Strength Tests of Sandstone and Claystone Samples Heated at High Temperatures up to 1200 °C and ," Energies, MDPI, vol. 14(20), pages 1-27, October.
    8. Prabu, V. & Jayanti, S., 2012. "Underground coal-air gasification based solid oxide fuel cell system," Applied Energy, Elsevier, vol. 94(C), pages 406-414.
    9. Prabu, V. & Geeta, K., 2015. "CO2 enhanced in-situ oxy-coal gasification based carbon-neutral conventional power generating systems," Energy, Elsevier, vol. 84(C), pages 672-683.
    10. Prabu, V. & Jayanti, S., 2012. "Laboratory scale studies on simulated underground coal gasification of high ash coals for carbon-neutral power generation," Energy, Elsevier, vol. 46(1), pages 351-358.
    11. 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.
    12. 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.
    13. Prabu, V. & Jayanti, S., 2011. "Simulation of cavity formation in underground coal gasification using bore hole combustion experiments," Energy, Elsevier, vol. 36(10), pages 5854-5864.
    14. Li, Xin & Tian, Jijun & Ju, Yiwen & Chen, Yanpeng, 2022. "Permeability variations of lignite and bituminous coals under elevated pyrolysis temperatures (35–600 °C): An experimental study," Energy, Elsevier, vol. 254(PA).
    15. Kumari, Geeta & Vairakannu, Prabu, 2018. "CO2-air based two stage gasification of low ash and high ash Indian coals in the context of underground coal gasification," Energy, Elsevier, vol. 143(C), pages 822-832.
    16. Saulov, Dmitry N. & Plumb, Ovid A. & Klimenko, A.Y., 2010. "Flame propagation in a gasification channel," Energy, Elsevier, vol. 35(3), pages 1264-1273.

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