Experimental study on the explosion suppression of methane by metal ion modified ZSM-5 zeolite

To enhance the inhibitory efficacy of ZSM-5 zeolite against methane explosions, various composite powders of ZSM-5 zeolite incorporating metal ions were synthesized, and methane explosion experiments were conducted to investigate the impact of different metal ion-modified ZSM-5 zeolites on methane explosion suppression. The modified zeolite powders were characterized and analyzed by technical means such as scanning electron microscopy and XRD analysis, and finally compared with the explosion suppression effect of the unmodified zeolite powder. The results show that the zeolite powder modified by metal ions has a better explosion suppression effect, and among them, the methane explosion pressure with the addition of K⁺/ZSM-5 zeolite explosion suppression powder is the lowest, and the maximum explosion pressure is reduced by 78.88 % compared with the non-powder spraying condition. This study examines the explosion suppression efficacy of the suppression powder, which encompasses adsorption, barrier formation, and the consumption of free radicals produced during the explosion process. The metal ions in the explosion suppression powder interact with the free radicals produced during the methane explosion, thereby blocking the chain reaction and suppressing the explosion.