Experimental investigations of the minimum ignition energy and the minimum ignition temperature of inert and combustible dust cloud mixtures

Addai, Emmanuel Kwasi; Gabel, Dieter; Krause, Ulrich

doi:10.1016/j.jhazmat.2016.01.018

Cited by 86 publications

(10 citation statements)

References 15 publications

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“…Ranks of Coal Dust. MIT and MIE are important characteristic parameters for evaluating the ignition sensitivity of coal dust [20][21][22]. Table 2 presents the MIT and MIE test results of the three different ranks of coal dust samples (HM, QM, and WY), although we were not able to obtain the MIE of WY within the maximum ignition energy achievable by the test apparatus (1000 J).…”

Section: Ignition Sensitivity and Flame Propagation Of Differentmentioning

confidence: 97%

Experimental Study on the Ignition Sensitivity and Explosion Severity of Different Ranks of Coal Dust

Wang

Meng

Zhang

et al. 2019

Shock and Vibration

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is study is conducted to examine the ignition sensitivity and explosion severity differences among different ranks of coal dust and reveal the causes underlying these differences. A G-G furnace, a Hartmann tube, and a 20 L explosion tank are used to test MIT, MIE, P max , (dp/dt) max , and other parameters of three different ranks of coal dust. SEM analysis is carried out on the coal dust before and after explosion to compare and trace their microstructure changes. e results indicate that the lower the rank of the coal, the more likely the dust cloud to be ignited, the faster the explosion flame propagated, and the greater the explosion severity. e main drivers behind the ignition sensitivity and explosion severity differences among different ranks of coal dust are the volatile content and pyrolytic property of the coal.

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Section: Ignition Sensitivity and Flame Propagation Of Differentmentioning

confidence: 97%

Experimental Study on the Ignition Sensitivity and Explosion Severity of Different Ranks of Coal Dust

Wang

Meng

Zhang

et al. 2019

Shock and Vibration

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“…The combustion of wheat starch and carbon-black particles have also been studied [11]. Addai et al [12] also assert that the inert materials with high bulk density are not ideal inertants. Generally, the devolatilization and char oxidation mainly predominate the whole combustion process [13], seeking an appropriate inertant for explosion suppression of organic dust is intriguing the increasing attention, but a few reports focus on the explosion property of organic dust.…”

Section: Introductionmentioning

confidence: 99%

Explosive property and combustion kinetics of grain dust with different particle sizes

Zhao

Tang

Wang

et al. 2020

Heliyon

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The effect of particle size on the combustion and explosion properties of grain dust is investigated by Hartmann tube, cone calorimeter (CC), and thermogravimetry (TG), it aims to provide fundamental experimental data of grain dust for an in-depth study on its potential risk. The fine-grain dust facilitates the decrease in the minimum ignition temperature (MIT) of dust layer and dust cloud, as well as the obvious increases in the maximum explosion pressure P max (climbs from 0.36 to 0.49 MPa) and pressure rising rate dP/dt (rises from 6.05 to 12.12 MPa s À1 ), leading to the increases in maximum combustion rate (dw/dτ) max and combustion characteristic index S, corresponding to the greater or severer potential risk. Because the E corresponding to combustion increases from 106.05 (sample with a particle size of 180-1250 μm) to 153.45 kJ mol À1 for the sample of 80-96 μm, the combustion process gradually transforms from diffusion-controlled into a kinetically controlled mode with the decreasing particle size of grain dust, together with the retardation of initially transient charring. It determines that the competition between the charring and combustion dominates the decomposition, and the combustion prevails for the coarse particle, while the charring controls the combustion for the fine-grain dust.

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“…8,9,10 The main technical methods of explosion suppression include the addition of inert gas, ultrafine water mist and powders in the reaction system. [11][12][13][14][15][16][17][18] One of the most common methods to suppress dust explosion is powder explosion suppression. 19,20 A lot of researchers have performed theoretical and experimental studies on powder explosion suppression.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the suppression effects of ammonium polyphosphate on explosion characteristics of unsaturated polyester resin dust

Yang

et al. 2020

Fire and Materials

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Summary The suppression effects of Ammonium Polyphosphate (APP) with different mass fractions on the maximum explosion pressure (Pmax), the explosibility index (Kst), the minimum ignition energy (MIE) and the minimum ignition temperature (MIT) of unsaturated polyester resin (UPR) dust were studied. Results indicated that the explosion severity and the ignition sensitivity of UPR dust decreased gradually when the mass fractions of APP increased. There existed a minimum inerting concentration (MIC), and the explosion of UPR dust could be suppressed completely by 60 wt% APP. Moreover, APP had a great inhibiting effect on the MIE of UPR dust cloud. The calculated MIE of UPR dust cloud increased from 10 mJ to 998 mJ when the mass fractions of APP increased to 30 wt%. Furthermore, the MIT of UPR dust cloud increased with the increase of the mass fractions of APP. When the mass fraction of APP increased to 80 wt%, the MIT increased by 290°C. The suppression mechanism of APP was studied according to thermogravimetry (TG) and differential scanning calorimetry (DSC) tests. Thermal analysis results showed that the addition of APP could increase the thermal stability of UPR. The suppression mechanism was reflected on the consumption of H and OH radicals.

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Experimental investigations of the minimum ignition energy and the minimum ignition temperature of inert and combustible dust cloud mixtures

Cited by 86 publications

References 15 publications

Experimental Study on the Ignition Sensitivity and Explosion Severity of Different Ranks of Coal Dust

Experimental Study on the Ignition Sensitivity and Explosion Severity of Different Ranks of Coal Dust

Explosive property and combustion kinetics of grain dust with different particle sizes

Experimental investigation of the suppression effects of ammonium polyphosphate on explosion characteristics of unsaturated polyester resin dust

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