Research on the Suppression of Methane Explosion by ZSM-5 Zeolite With Different Si/Al Ratios

To investigate the impact of single zeolite powder on methane explosion inhibition, a ZSM-5 zeolite with a porous structure was utilized as the raw material and subjected to alkali treatment to obtain the zeolites' powers with varying Si/Al ratios. The modified powders were characterized and analyzed using SEM, XRD, EDS analysis, etc. and compared with unmodified zeolite powders regarding their explosion suppression effects. The results demonstrated that alkali-treated zeolite powders exhibited superior explosion suppression effects, with the optimum effect achieved at the Si/Al ratio of 10.32, reducing the maximum explosion pressure by 84.24% compared to unfilled conditions. In this study, the explosion suppression effect of the explosion suppression powders includes adsorption of gases, barrier effect, and reaction with free radicals in the explosion process. Desilication increased sodium content within the zeolites; however, this content decreased as the silicon-to-aluminum ratio increased due to its capability to capture free radicals generated during explosions and interrupt chain reactions.