Explosion suppression characteristics of modified ABC powder driven by argon/CO2.

This paper changed ABC powder and performed a comparison on the suppression of methane explosions between pure modified powder under various operating circumstances and cold aerosols induced by various inert gases (argon, CO 2). The results show that the maximum explosion pressure and flame velocity greatly decrease when inert gases act as catalytic gases. Different inert catalytic gases have various inhibitory effects on cold aerosols. Argon can delay the arrival of explosion overpressure. CO 2 gas can produce bidirectional inhibitory effects from inerting and free radical chain reactions. It not only delays the occurrence of explosion overpressure, but also enhances explosion suppression ability. The most effective inhibitor is the cold aerosol, which contains 0.06 g/L of modified powder and 24% CO 2 gas. Finally, under the influence of inert gases (argon, CO 2), the modified ABC powder creates a cold aerosol that can more effectively suppress methane explosions. [Display omitted] • Modified ABC powder has better pyrolysis effect and heat absorption ability. • A cold aerosol explosion suppressor has been developed. • Argon and CO 2 can delay the arrival of explosive overpressure. • CO 2 can enhance the powder's explosion suppression ability. • This material can provide experience in reducing methane explosion accidents. [ABSTRACT FROM AUTHOR]