Experimental investigation of explosion mitigating properties of aqueous potassium carbonate solutions

Roosendans, Dirk; Wingerden, Kees van; Holme, Margaret N.; Hoorelbeke, Pol

doi:10.1016/j.jlp.2017.02.008

Cited by 22 publications

(4 citation statements)

References 33 publications

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“…These alterations are of utmost significance in comprehending the fire-suppression properties of the materials. 7 presents a visual comparison of the samples, allowing for a detailed examination [27,28] (Figure 7a). The shown image displays unexpanded EG powder in its pure form, exhibiting a uniformly smooth surface, without any discernible particles or imperfections (Figure 7b).…”

Section: Structural Analysis and Visualizationmentioning

confidence: 99%

A Comparative Approach Study on the Thermal and Calorimetric Analysis of Fire-Extinguishing Powders

Huang,

Cao,

2024

Safety

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This study offers a comprehensive evaluation of the effectiveness of expansible graphite (EG) and potassium bicarbonate (KHCO3) in suppressing metal fires, which are known for their high intensity and resistance. Our assessment, utilizing thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM), revealed that compositions of EG–KHCO3 can endure temperatures of up to 350 °C, indicating their thermal resilience. The 3:1 EG–KHCO3 mixture demonstrated exceptional performance in fire suppression tests by extinguishing sodium flames in a mere 20 s, using approximately 50 g of the agent. This highlights a substantial improvement in efficiency. In addition, FTIR analysis identified important gaseous compounds released during decomposition, while XRD and SEM techniques confirmed the advantageous insertion of KHCO3 into the EG matrix, enhancing its resistance to heat and chemical reactions. The mixture with a ratio of 3:1 also demonstrated a higher cooling rate of 2.34 °C/s within the temperature range of 350 to 200 °C. The results emphasize the potential of EG–KHCO3 compositions, specifically in a 3:1 ratio, for efficient fire management by integrating fire suppression, heat resistance, and quick cooling. Subsequent investigations will prioritize the evaluation of these compositions across different circumstances and the assessment of their environmental and industrial viability.

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Section: Structural Analysis and Visualizationmentioning

confidence: 99%

A Comparative Approach Study on the Thermal and Calorimetric Analysis of Fire-Extinguishing Powders

Huang,

Cao,

2024

Safety

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“…Due to the excellent fire extinguishing characteristics of ultrafine water mist, many scholars worldwide have conducted research on the effectiveness of ultrafine water mist in explosion suppression, and have achieved good research results in simple gas explosion suppression. Roosendans et al (2017) investigated the inhibitory impact of water mist with a particle size of 500 𝜇𝜇𝜇𝜇 on hydrogen explosions within pipelines. The findings revealed that water mist can significantly diminish the explosion pressure and extinguish the explosion flame.…”

Section: Experimental Framework Test Equipmentmentioning

confidence: 99%

Numerical Simulation on Methane Coal Dust Composite Explosion in Restricted Space by Ultrafine Water Mist Suppression

Pacifique,

Ke,

Jia

et al. 2023

ejtas

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The purpose of this experimental investigation was to examine the effects of ultrafine water mist on explosions caused by methane and coal dust hybrids that occurred inside of a closed vessel. In this study, we built a small-scale semi-closed visualization experimental platform and ran simulations to study the effects of four factors on the explosion of methane coal mixtures: the amount of ultra-fine water mist sprayed, the volume fraction of methane, the position of the methane inlet, and the amount of time it took to premix. This allowed us to gain a deeper understanding of the repressive effect of this water mist on methane explosion. The findings demonstrate that ultrafine water mist is capable of suppressing methane explosions, with a notable inhibitory effect on 10% methane. This inhibitory effect becomes stronger with increasing amounts of sprayed ultrafine water mist. The effect of methane volume fraction on the maximum explosion overpressure Δ

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“…Experimental Conditions. Fine water mist containing four different concentrations of KCl, four different volume fractions of N 2 , and four different volume fractions of CO 2 was used for the single-factor explosion suppression experiments, 19,21,24,25 and the experimental conditions are shown in Table 1.…”

Section: Single-factor Explosion Suppression Testmentioning

confidence: 99%

Study on Methane Explosion Suppression in Diagonal Pipe Networks Using a Fine Water Mist Containing KCl and an Inert Gas

2022

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To explore an effective approach for suppressing methane explosions in actual pipe networks, we used a custom-made diagonal pipe network experimental system to assess the suppression of methane explosions using a fine water mist containing KCl and an inert gas. The shock wave pressure, flame wave velocity, and flame wave temperature under different suppression conditions were compared to characterize the effects of explosion suppression under different working conditions, and the mechanism of explosion suppression was analyzed. The results showed that under single-factor explosion suppression conditions the optimal explosion suppression results were achieved when the volume fraction of N 2 was 25%, the volume fraction of CO 2 was 20%, and the concentration of KCl was 7%. The suppression effect of CO 2 on the flame wave temperature was better than fine water mist containing KCl and N 2 , and the suppression effect of fine water mist containing KCl on the shock wave overpressure and flame wave velocity was more significant. Under the working conditions of fine water mist containing KCl, which was coupled with an inert gas to suppress the explosion, the suppression effect of the fine water mist containing KCl coupled with 20% CO 2 on the shock wave overpressure, flame wave velocity, and flame wave temperature was considerably better than fine water mist containing KCl coupled with 25% N 2 .

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Experimental investigation of explosion mitigating properties of aqueous potassium carbonate solutions

Cited by 22 publications

References 33 publications

A Comparative Approach Study on the Thermal and Calorimetric Analysis of Fire-Extinguishing Powders

A Comparative Approach Study on the Thermal and Calorimetric Analysis of Fire-Extinguishing Powders

Numerical Simulation on Methane Coal Dust Composite Explosion in Restricted Space by Ultrafine Water Mist Suppression

Study on Methane Explosion Suppression in Diagonal Pipe Networks Using a Fine Water Mist Containing KCl and an Inert Gas

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