Experimental Study on Explosion Characteristics of LPG/Air Mixtures Suppressed by CO2 Synergistic Inert Powder
Abstract
:1. Introduction
2. Experiment
2.1. Explosion Testing System
2.2. Experiment Material
2.3. Experimental Procedure
3. Results and Discussion
3.1. Comparison of Explosion Suppression Effects of Different Inert Powders
3.2. Synergistic Explosion Suppression Effect of CO2 with Inert Powders
3.3. Mechanism Analysis of Explosion Suppression
4. Conclusions
- The inert powders of NaHCO3 and Al(OH)3 both have inhibitory effects on LPG explosions. As the inert powder content increases, the explosion pressure gradually decreases. The inhibitory effect on explosions is better for NaHCO3 than for Al(OH)3.
- The explosion suppression effects of both gas/solid two-phase inhibitors increase with an increasing CO2 volume fraction or NaHCO3 and Al(OH)3 mass concentrations. Among them, CO2/NaHCO3 exhibits better synergistic explosion suppression than CO2/Al(OH)3, and the synergistic suppression effect becomes more pronounced with higher CO2 volume fractions.
- The addition of both inert powders and inert gases reduces the flame propagation speed of LPG explosions and weakens the flame brightness. CO2 generated from the thermal decomposition of inert powders can decrease the O2 concentration in the explosion reaction system, and the generated H2O absorbs the heat released by the explosion reaction system. The resulting solid salts are non-flammable inorganic substances that hinder combustion reactions. CO2 can reduce the combustion rate and flame temperature of LPG, weakening the intensity of combustion explosions.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Zhao, E.; Liu, Z.; Lin, S.; Chu, X. Experimental Study on Explosion Characteristics of LPG/Air Mixtures Suppressed by CO2 Synergistic Inert Powder. Fire 2024, 7, 275. https://doi.org/10.3390/fire7080275
Zhao E, Liu Z, Lin S, Chu X. Experimental Study on Explosion Characteristics of LPG/Air Mixtures Suppressed by CO2 Synergistic Inert Powder. Fire. 2024; 7(8):275. https://doi.org/10.3390/fire7080275
Chicago/Turabian StyleZhao, Enlai, Zhentang Liu, Song Lin, and Xiaomeng Chu. 2024. "Experimental Study on Explosion Characteristics of LPG/Air Mixtures Suppressed by CO2 Synergistic Inert Powder" Fire 7, no. 8: 275. https://doi.org/10.3390/fire7080275