Study on suppression of CH4 explosion by CF3H and CO2

Abstract

To compare the inhibitory effects of HFC-23 (CF3H) and CO2 on methane explosion characteristics, a 20 L spherical explosion pressure testing system was used to measure the effects of two inhibitors on the explosion limit range of CH4 in air. The effects of two inhibitors with different volume fractions on the explosion pressure parameters of 9.5% volume fraction CH4 were studied, and the explosion suppression triangles of the two inhibitors for CH4 explosion in air were analyzed. The results indicate that both CF3H and CO2 can reduce the explosion limit range of methane in air, and the required volume fractions of CF3H and CO2 to suppress CH4 detonation are 12.5% and 21.5%, respectively. Compared the explosion suppression parameters (peak reaction pressure and pressure rise rate) that inhibit CH4 by volume fraction CH4, the explosion suppression ability of 10% CF3H is 1.95 times and 1.3 times that of an equal amount of 9.5% CO2, but CF3H with volume fraction of 4% has a weak promotion effect on the explosion of CH4 when it used alone. The explosion suppression triangle of the two inhibitors shows that the explosive area under CF3H suppression is smaller than CO2, and the suffocation ratio of CF3H in the safe area is 57% of CO2.

Keywords

• methane explosion
• gas explosion
• co2
• cf3h
• explosion limit
• suppressant
• explosion pressure
• explosive triangle