Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process
Xiyang Fang1
Bo Tan1
Haiyan Wang2
1.School of Emergency Management and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China2.School of Civil and Resources Engineering,University of Science and Technology,Beijing 100083,China
摘要：To test the effectiveness of N2 and CO2 in preventing coal from spontaneously combusting,researchers used an adiabatic oxidation apparatus to conduct an experiment with different temperature starting points.Non-adsorbed helium(He)was used as a reference gas,and coal and oxygen concentration temperature variations were analyzed after inerting.The results showed that He had the best cooling effect,N2 was second,and CO2 was the worst.At 70℃ and 110℃,the impact of different gases on reducing oxygen concentration and the cooling effect was the same.However,at the starting tempera-ture of 150℃,CO2 was less effective in lowering oxygen concentration at the later stage than He and N2.N2 and CO2 can prolong the flame retardation time of inert gas and reduce oxygen displacement with an initial temperature increase.When the starting temperature is the same,N2 injection cools coal samples and replaces oxygen more effectively than CO2 injection.The flame retardancy of inert gas is the combined result of the cooling effect of inert gas and the replacement of oxygen.These findings are essential for using inert flame retardant technology in the goaf.
机标关键词：oxidationprocessflamestudyadiabaticcoalcomparativeduring
论文发表日期：2023-08-28
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：11( 254-264 )
英文信息