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Combustion Properties of Low-concentration Methane under Different Porous Media Configurations
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Jian-guo ZHANG1, Cheng ZHAI2, Guo-chuan ZHANG1, Yun-qi CAO3, Fang LIU3, *, Yan-jun TONG1, Tong SU3
Science Technology and Engineering | 2025, 25(16) : 6752 - 6759
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Science Technology and Engineering | 2025, 25(16): 6752-6759
• Papers·Energy and Power Engineering •
Combustion Properties of Low-concentration Methane under Different Porous Media Configurations
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Jian-guo ZHANG1, Cheng ZHAI2, Guo-chuan ZHANG1, Yun-qi CAO3, Fang LIU3, *, Yan-jun TONG1, Tong SU3
Affiliations
  • 1 Pingdingshan Tianan Coal Mining Co. , Ltd. , Pingdingshan 467099, China
  • 2 School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
  • 3 School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Published: 2025-06-08 doi: 10.12404/j.issn.1671-1815.2405187
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In order to address the problems of poor flame stability, low combustion efficiency and high lean-combustion limit in traditional direct-fired porous media burners, five porous media burners with different pore arrangements were constructed for low-concentration methane (LCM) combustion experiments, and the effects of porous media arrangements, equivalence ratios and flow rates on the combustion properties of LCM were investigated. CH4 conversion, pollutant emissions and flue gas temperatures were also analyzed under lean combustion conditions. The results show that the E-type gradually-varied porous media burner exhibits the optimal LCM combustion adaptability, which can partially compensate for the interface temperature perturbation and improve combustion stability during LCM combustion. At an equivalence ratio of 0.39 and a flow rate of 50 L/min, the stationary combustion time of LCM in the burner exceeds 140 min and the flame position is consistently maintained at 60 mm. The LCM combustion in the E-type porous media achieves a CH4 conversion of 99.99% with CO and NOx emissions of 531×10-6 and 23×10-6, respectively, generating high-quality flue gas with a mean temperature of more than 588 ℃ that can be employed in industrial production. The research results provide an important reference for improving the utilization efficiency of low-concentration methane in coal mines and reducing methane emissions.

porous media combustion  /  low-concentration methane  /  gradually-varied arrangement  /  combustion properties  /  lean-combustion limit
Jian-guo ZHANG, Cheng ZHAI, Guo-chuan ZHANG, Yun-qi CAO, Fang LIU, Yan-jun TONG, Tong SU. Combustion Properties of Low-concentration Methane under Different Porous Media Configurations[J]. Science Technology and Engineering, 2025 , 25 (16) : 6752 -6759 . DOI: 10.12404/j.issn.1671-1815.2405187
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Year 2025 volume 25 Issue 16
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Article Info
doi: 10.12404/j.issn.1671-1815.2405187
  • Receive Date：2024-07-10
  • Online Date：2025-07-09
  • Published：2025-06-08
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History
  • Received：2024-07-10
  • Revised：2025-03-08
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Affiliations
    1 Pingdingshan Tianan Coal Mining Co. , Ltd. , Pingdingshan 467099, China
    2 School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
    3 School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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