Physical mechanisms involved into the flame propagation process through aluminum dust-air clouds: A review

Moussa, Rim Ben; Proust, Christophe; Guessasma, Mohamed; Saleh, Khashayar; Fortin, Jérôme

doi:10.1016/j.jlp.2016.11.010

Cited by 32 publications

(4 citation statements)

References 80 publications

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“…From the physical perspective, when the temperature was about 2300 K, the aluminum core began to melt and the oxide film of the aluminum dust particles began to break. Then the alumina shell started to transit and the oxide layer would break. , The flame temperature of aluminum dust decreased with the increase of VC-PA-MEL. VC-PA-MEL had many organic groups and was easily dispersed in aluminum powder .…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of a Novel Inhibitor and Its Inhibition Mechanism on Aluminum Dust Explosions

Zhu

Shang

Jiang

et al. 2022

Ind. Eng. Chem. Res.

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A green and efficient nanoinhibitor VC-PA-MEL for aluminum dust explosion was synthesized in this study. The inhibition effect of the novel inhibitor on aluminum dust explosions was systematically studied. Results showed that after adding VC-PA-MEL, the dust flames transited from the luminous flame with a continuous structure to irregular discrete flames. The flame propagation velocities of 30 and 5 μm dust declined to 96.54 and 99.38%, respectively. The minimum inhibition concentrations for 30 and 5 μm aluminum dust were 600 and 800 g/m3, respectively. Explosion residuals were analyzed to reveal the inhibition mechanism of VC-PA-MEL in detail. VC-PA-MEL can effectively inhibit the explosion of aluminum dust through the synergistic physics and chemistry effects. In general, the combustion heat could be absorbed and the free radicals could be scavenged. VC-PA-MEL provides a potential direction for developing efficient inhibitors for the inhibition of aluminum dust explosions and to improve process safety.

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Section: Resultsmentioning

confidence: 99%

“…Then the alumina shell started to transit and the oxide layer would break. 29,30 The flame temperature of aluminum dust decreased with the increase of VC-PA-MEL. VC-PA-MEL had many organic groups and was easily dispersed in aluminum powder.…”

Section: Suppression Mechanismmentioning

confidence: 99%

Synthesis of a Novel Inhibitor and Its Inhibition Mechanism on Aluminum Dust Explosions

Zhu

Shang

Jiang

et al. 2022

Ind. Eng. Chem. Res.

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“…Micron and nanometer scale metallic powders, serving as combustion components, can enhance the calorific value of energetic materials while reducing reaction temperatures, presenting significant potential for development and application [1]. Among these, micron and nanometer scale aluminum powder is the most widely used.…”

Section: Introductionmentioning

confidence: 99%

Studies on activity and oxide shell thickness of micron-sized Mg-Al alloy powder

Liu,

Ren

2024

Camb. Sci. Adv.

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The empirical formula of average oxide thickness of atomized micron-sized aluminum - magnesium alloy powder was proposed. At the same time, the influence of particle size and the ratio of magnesium on samples’ activity was studied. The phase composition, morphology, and oxidation process of the alloy powders were studied by x-ray diffraction, scanning electron microscope/energy-dispersive x-ray, respectively. Study on the change of powder activity was achieved by standard gas volumn method. The results show that the oxide thickness of the atomized micron-sized aluminum - magnesium alloy powder is positively correlated with the particle size, and the activity decreases with the increase of the particle size and the magnesium content.

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“…Our goal is to present a technique that creates an environment within the bomb calorimeter simulating particles burning in dust explosion conditions [1] and assess particle heat output representative of these real conditions. Dust explosion environments are common in energetic material applications, such as enhanced blast [2], explosively dispersed [3][4][5], or high velocity impact [6] conditions that produce single particle or particle agglomerate burning in clouds.…”

Section: Introductionmentioning

confidence: 99%

Direct demonstration of complete combustion of gas-suspended powder metal fuel using bomb calorimetry

Tran

Altman

Dubé

et al. 2022

Meas. Sci. Technol.

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Off-the-shelf calorimeters are typically used for hydrocarbon-based fuels and not designed for simulating metal powder oxidation in gaseous environments. We have developed a method allowing a typical bomb calorimeter to accurately measure heat released during combustion and achieve nearly 100% of the reference heat of combustion from powder fuels such as aluminum. The modification uses a combustible organic dispersant to suspend the fuel particles and promote more complete combustion. The dispersant is a highly porous organic starch-based material (i.e., packing peanut) and allows the powder to burn as discrete particles thereby simulating dust-type combustion environments. The demonstrated closeness of measured Al heat of combustion to its reference value is evidence of complete metal combustion achieved in our experiment. Beyond calorific output under conditions simulating real reactive systems, we demonstrate that the calorimeter also allows characterization of the temporal heat release from the reacting material and this data can be extracted from the instrument. The rate of heat release is an important additional parameter characterizing the combustion process. The experimental approach described will impact future measurements of heat released during combustion from solid fuel powders and enable scientists to quantify the energetic performance of metal fuel more accurately as well as the transient thermal behavior from combusting metal powders.

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Physical mechanisms involved into the flame propagation process through aluminum dust-air clouds: A review

Cited by 32 publications

References 80 publications

Synthesis of a Novel Inhibitor and Its Inhibition Mechanism on Aluminum Dust Explosions

Synthesis of a Novel Inhibitor and Its Inhibition Mechanism on Aluminum Dust Explosions

Studies on activity and oxide shell thickness of micron-sized Mg-Al alloy powder

Direct demonstration of complete combustion of gas-suspended powder metal fuel using bomb calorimetry

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