Experimental study of C2HF5/illite to inhibit methane explosion
In order to develop a new environmentally friendly and efficient methane explosion inhibitor,based on the self-developed transparent acrylic pipeline explosion experimental platform,the effects of single-phase gas pentafluoroethane(C2HF5),illite powder single-phase inhibitor and C2HF5/illite powder two-phase inhibitor on the explosion suppression effect and explosion characteristic parameters of methane/air premixed gas were tested,and the illite powder was characterized and analyzed by electron microscope scanning and particle size analysis.The results show that pentafluoroethane and illite powder have a detoxification effect on methane/air premixed gas when acting alone,and the detonation effect of C2HF5 increases with the increase of volume fraction,and when the volume fraction is greater than 6%,the explosion suppression is completely suppressed,and the best explosion inhibition mass concentration of illite powder is 0.16 g/L.The explosion suppression effect under the joint action of C2HF5/illite powder two-phase explosion suppressant is better,with the dual explosion suppres-sion of gas and powder,and C2HF5 has a critical volume fraction,when it is higher than the critical volume frac-tion.The addition of a lower mass concentration of illite powder can completely suppress the explosion.The critical volume fraction is 3%～4%.In addition,the mechanism of C2HF5/illite inhibition of methane/air mixed gas explosion was analyzed by combining the pyrolysis characteristics of gas and powder explosion suppressants and the characterization and elemental composition of illite powder.This study can provide reference for the de-velopment and utilization of new explosion suppressants for gas explosion disasters.
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