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Study on inhibition effect of active composite powder for methane explosions
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Tenglong ZHAO1, 2, Fengxiao WANG**, 1, 2, Zihao LI1, 2, Xiaotong YIN1, 2
China Safety Science Journal | 2026, 36(2) : 180 - 188
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China Safety Science Journal | 2026, 36(2): 180-188
• Public Safety and Emergency Management •
Study on inhibition effect of active composite powder for methane explosions
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Tenglong ZHAO1, 2, Fengxiao WANG**, 1, 2, Zihao LI1, 2, Xiaotong YIN1, 2
Affiliations
  • 1College of Safety Science and Engineering, Liaoning Technical University, Huludao, Liaoning 125105, China
  • 2Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Huludao, Liaoning 125105, China
Published: 2026-02-28 doi: 10.16265/j.cnki.issn1003-3033.2026.02.0668
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To obtain the powder suppressant with greater inhibition effect, NaHCO3, Al(OH)3, K2CO3 and NH4H2PO4 were mixed by a compounding method, and a new composite powder was obtained. A visual spherical vessel was applied to study the effects of the composite powder with different mixing ratios on methane explosion overpressure, flame propagation and free radical production. The results indicate that as the mass proportion of NaHCO3, Al(OH)3, K2CO3 and NH4H2PO4 is 1∶1∶2∶1, the inhibition effect of composite powder is significantly greater than that of the single powder. The synergistic mechanisms of the composite powder are as follows: Before 250 ℃, the composite powder undergoes a metathesis reaction, a large number of gases such as H2O, CO2 and NH3 are released. In the early stage of methane explosion, the energy is absorbed and methane is diluted by the gases, so the rapid flame propagation is inhibited. NH4H2PO4 plays a role in absorbing C-containing free radicals during methane combustion. This effect is enhanced when powder is mixed, leading to a further inhibition for methane combustion reaction.

composite powder  /  methane explosion  /  inhibition effect  /  synergistic effect  /  flame propagation  /  free radical
Tenglong ZHAO, Fengxiao WANG, Zihao LI, Xiaotong YIN. Study on inhibition effect of active composite powder for methane explosions[J]. China Safety Science Journal, 2026 , 36 (2) : 180 -188 . DOI: 10.16265/j.cnki.issn1003-3033.2026.02.0668
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Year 2026 volume 36 Issue 2
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Article Info
doi: 10.16265/j.cnki.issn1003-3033.2026.02.0668
  • Receive Date：2025-09-25
  • Online Date：2026-07-08
  • Published：2026-02-28
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  • Received：2025-09-25
  • Revised：2025-12-16
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Affiliations
    1College of Safety Science and Engineering, Liaoning Technical University, Huludao, Liaoning 125105, China
    2Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Huludao, Liaoning 125105, 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
species (%)
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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