论文信息 - Effects of N2/CO2 on explosion characteristics of methane and air mixture

Effects of N2/CO2 on explosion characteristics of methane and air mixture

Abstract An experimental apparatus for the methane and air mixture explosion with N 2 /CO 2 in a closed vessel was set up. A series of experiments have been performed to analyze the effects of N 2 /CO 2 on explosion strength, limiting oxygen concentration, flammability limits and explosion suppression. Results show that explosion strength decreases with the volume fraction of N 2 /CO 2 in the mixture. Limiting oxygen concentration decreases linearly with the volume fraction of N 2 in N 2 /CO 2 mixture. The flammability limits change linearly with the volume fraction of N 2 /CO 2 in the mixture. The higher the volume fraction of CO 2 in N 2 /CO 2 mixture, the better the explosion suppression effect is. Based on experimental data, fitted equations and diagrams are made to predict methane flammability limits with N 2 /CO 2 under different volume fraction ratio of N 2 and CO 2 . The research results can be used as a reference for the inerting treatment design of methane explosion protection in process industries.

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