Effect of coal mine organic aerosol on the methane/air lower explosive limit
S.V.Valiulin1
A.A.Onischuk1
A.M.Baklanov2
A.A.Bazhina3
D.Yu.Paleev4
V.V.Zamashchikov2
A.A.Korzhavin5
S.N.Dubtsov5
1.Voevodsky Institute of Chemical Kinetics and Combustion,Novosibirsk 630090,Russia;Novosibirsk State University,Novosibirsk 630090,Russia;Novosibirsk State Pedagogical University,Novosibirsk 630126,Russia2.Voevodsky Institute of Chemical Kinetics and Combustion,Novosibirsk 630090,Russia;Novosibirsk State University,Novosibirsk 630090,Russia3.Voevodsky Institute of Chemical Kinetics and Combustion,Novosibirsk 630090,Russia;Novosibirsk State Pedagogical University,Novosibirsk 630126,Russia4.Institute of Coal,Kemerovo 650610,Russia5.Voevodsky Institute of Chemical Kinetics and Combustion,Novosibirsk 630090,Russia
摘要：Organic aerosol is formed in coal mines due to heat release and evaporation of organics from coal during the longwall operation.This frictional heating occurs when a metallic cutting bit strikes a rock.Thus formed organic aerosol can contribute significantly to the explosivity of methane/air atmosphere in coal mines.In this paper,the flammable limits for the methane-air mixtures with organic aerosol are determined.For this purpose,organic aerosol is synthesizes from the coal-tar pitch in a laboratory evaporation-nucleation flow chamber.Aerosol particles synthesized under laboratory conditions are aggregates consisting of small primary particles with the fractal-like dimension Df = 2.0 ±0.1,which is close to Df-= 2.1 ±0.1 of coal mine aerosol.It is shown that the flammability of organic aerosol/methane mixture in air is in good agreement with the Le Chatelier additive principle.The lower ignition limit for the pure organic aerosol in air is 44 g/m3.
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论文发表日期：2020-12-30
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：9( 778-786 )
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