Effect of inert gas CO2on deflagration pressure of CH4/CO

Abstract

To study the effect of CO2 on the explosion characteristics of CH4/CO, the explosion experiments of the effect of different volume fractions of CO2 on CH4/CO deflagration were carried out by using the self-developed pipeline gas explosion experimental platform. The explosion characteristics of premixed gas are studied from the aspects of explosion peak pressure and time of reaching the peak pressure. The results show that the effect of CO on the deflagration of methane with a different volume fraction is the result of the interaction of the elementary reaction and the oxygen content in the reaction system. Two percent of the CO promoted the methane explosion in the oxygen-rich state, while it showed a damping effect in the oxygen-poor state. CO2 has different inhibitory effects on different volume fractions of methane. Experiments show that the addition of 20% CO2 can effectively inhibit the deflagration of methane. The addition of CO2 has a stronger inhibitory effect on the mixed gas of CH4/CO under the condition of poor oxygen but less on the mixed gas under the condition of rich oxygen.