CHINESE JOURNAL OF ENERGETIC MATERIALS
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Analysis of Coupling Relationship Between Critical Free Radical and Explosion Pressure in the Initial Stage of Methane Explosion
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1.Department of Fire Protection Engineering, China People''s Police University, Langfang 065000, China;2.Department of Graduate Division, China People''s Police University, Langfang 065000, China;3.Ankang City Fire Department of Shaanxi Province, Ankang 725700, China

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    Abstract:

    To establish the relationship between the microscopic chemical reaction mechanism and the macroscopic explosion pressure in the initial stage of methane explosion, the coupling relationship between content changes of key free radicals or molecules (such as CO2, C2, CHO•, OH•, C3) and explosion pressure was investigated experimentally. The flame emission spectrum explosion pressure were obtained by a 20-Litre standard spherical explosion container and a grating spectrometer. Studies show that large amounts of CO2 are produced during the pressure rising period, while the formation of C2 and CHO• are primarily in the explosion induction period and they are consumed rapidly when explosion pressure rises. The content of OH• is at a high level throughout the methane explosion. The rapid increase of CO2 accompanies with pressure rising, which reveals a positive correlation. On the contrary, the consumption of C2 and CHO• accelerates when explosion pressure rises, revealing that they are correlated negatively. Formation reduction of C2 and CHO• and their corresponding contents during the explosion induction period, suppression on OH• production during the whole methane explosion and decrease or inhibition in CO2 formation can slow down or inhibit the explosion process and effectively reduce the methane explosion pressure. The result shows that it is possible to inhibit explosion and reduce the pressure efficiently through the manipulation of decreasing the production of C2 and CHO• in the induction period, reducing the content of OH• throughout methane explosion and suppressing the formation of CO2.

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李孝斌,崔沥巍,张瑞杰,等.甲烷爆炸初期关键自由基化学发光与爆炸压力的耦合关系分析[J].含能材料,2020,28(8):779-785.
LI Xiao-bin, CUI Li-wei, ZHANG Rui-jie, et al. Analysis of Coupling Relationship Between Critical Free Radical and Explosion Pressure in the Initial Stage of Methane Explosion[J]. Chinese Journal of Energetic Materials,2020,28(8):779-785.

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History
  • Received:November 22,2019
  • Revised:June 05,2020
  • Adopted:May 09,2020
  • Online: June 03,2020
  • Published: August 25,2020