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Analysis of the Characteristics of CH 4 Emissions in China’s Coal Mining Industry and Research on Emission Reduction Measures

Author

Listed:
  • Anyu Zhu

    (School of Emergency Management and Safety Engineering, China University of Mining and Technology, Beijing 100083, China)

  • Qifei Wang

    (School of Mechanical-Electronic and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China)

  • Dongqiao Liu

    (State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083, China)

  • Yihan Zhao

    (School of Mechanical-Electronic and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China)

Abstract

CH 4 is the second-largest greenhouse gas and has a significant impact on global warming. China has the largest amount of anthropogenic coal mine methane (CMM) emissions in the world, with coal mining emissions (or gas emissions) accounting for 90% of total energy industry emissions. The results of CH 4 emission inventories from previous studies vary widely, with differences in the spatial and temporal dimensions of gas emission factors of belowground mining being the main points of disagreement. Affected by the policies of “eliminating backward production capacity” and “transferring energy base to the northwest”, China’s coal production layout has changed greatly in the past ten years, but the closely related CH 4 emission factors have not been dynamically adjusted. This paper investigated 23 major coal producing provinces in China, obtained CH 4 emission data from coal mining, calculated CH 4 emission factors in line with current production conditions, and studied the reduction measures of coal mine gas emission. According to the CH 4 emission data of China’s coal mines in 2018, 15.8 Tg of methane is released per year in the coal mining industry in China, and 11.8 Tg after deducting recycling. Shanxi Province’s CH 4 emissions are much higher than those of other provinces, accounting for 35.5% of the country’s total emissions. The weighted CH 4 emission factor of coal mining in China is 6.77 m 3 /t, of which Chongqing is the highest at approximately 60.9 m 3 /t. Compared with the predicted value of the IPCC, the growth trend of CCM has slowed significantly, and the CH 4 utilization rate has gradually increased. This change may be aided by China’s coal industry’s policy to resolve excess capacity by closing many high-gas and gas outburst coal mines. In addition, the improvement of coal mine gas extraction and utilization technology has also produced a relatively significant effect. This paper determines the distribution of methane emissions and emission sources in China’s coal mining industry, which is useful in formulating CCM emission reduction targets and adopting more efficient measures.

Suggested Citation

  • Anyu Zhu & Qifei Wang & Dongqiao Liu & Yihan Zhao, 2022. "Analysis of the Characteristics of CH 4 Emissions in China’s Coal Mining Industry and Research on Emission Reduction Measures," IJERPH, MDPI, vol. 19(12), pages 1-17, June.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:12:p:7408-:d:840604
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    References listed on IDEAS

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    1. Zhang, Bo & Chen, G.Q., 2010. "Methane emissions by Chinese economy: Inventory and embodiment analysis," Energy Policy, Elsevier, vol. 38(8), pages 4304-4316, August.
    2. Wang, Ke & Zhang, Jianjun & Cai, Bofeng & Yu, Shengmin, 2019. "Emission factors of fugitive methane from underground coal mines in China: Estimation and uncertainty," Applied Energy, Elsevier, vol. 250(C), pages 273-282.
    3. Zhang, Bo & Yang, T.R. & Chen, B. & Sun, X.D., 2016. "China’s regional CH4 emissions: Characteristics, interregional transfer and mitigation policies," Applied Energy, Elsevier, vol. 184(C), pages 1184-1195.
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    1. Guo, Jinling & Gao, Junlian & Yan, Kejia & Zhang, Bo, 2023. "Unintended mitigation benefits of China's coal de-capacity policies on methane emissions," Energy Policy, Elsevier, vol. 181(C).
    2. Min Zhang & Yan Qiu & Chunling Li & Tao Cui & Mingxing Yang & Jun Yan & Wu Yang, 2023. "A Habitable Earth and Carbon Neutrality: Mission and Challenges Facing Resources and the Environment in China—An Overview," IJERPH, MDPI, vol. 20(2), pages 1-35, January.
    3. Nina Khanna & Jiang Lin & Xu Liu & Wenjun Wang, 2024. "An assessment of China’s methane mitigation potential and costs and uncertainties through 2060," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    4. Menghan Zhang & Suocheng Dong & Fujia Li & Shuangjie Xu & Kexin Guo & Qian Liu, 2022. "Spatial–Temporal Evolution and Improvement Measures of Embodied Carbon Emissions in Interprovincial Trade for Coal Energy Supply Bases: Case Study of Anhui, China," IJERPH, MDPI, vol. 19(24), pages 1-16, December.

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