Experimental investigation of the inerting effect of crystalline II type Ammonium Polyphosphate on explosion characteristics of micron-size Acrylates Copolymer dust

Yuan, Yu; Li, Yunhao; Zhang, Qingwu; Ni, Weishun; Jiang, Juncheng

doi:10.1016/j.jhazmat.2017.10.060

Cited by 43 publications

(5 citation statements)

References 30 publications

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“…28 The experimental method was adopted following a previous study. 26 First, UPR/APP mixtures were stored in a dust container. Then, the safely sealed explosion vessel was vacuumed in part to −0.6 bar (Absolute) and the dispersing air pressure of dust container set to 20 bar (Gage).…”

Section: Experimental Apparatus For Explosion Severity Parametersmentioning

confidence: 99%

“…It is worth noting that the ignition energy of the chemical igniter was 2 kJ. 26 A typical plot of pressure vs time during dust explosion is shown in Figure 2.…”

Section: Experimental Apparatus For Explosion Severity Parametersmentioning

confidence: 99%

“…29 The experimental apparatus ( Figure 3) and methods were the same as those in our previous study. 26 The initial pressure and temperature of all experiments were maintained at 1 atm and 25 C. The dispersion pressure and ignition delay time were 7 bars and 60 ms, respectively. The electrical spark was produced by two electrodes installed on either side of the glass tube.…”

Section: Experimental Apparatus For Miementioning

confidence: 99%

“…Ammonium polyphosphate (APP), as one of the phosphorus containing flame-retardant additives, is becoming increasingly popular because of its environment-friendliness, prominent processability and low cost. 24,25 Previous studies 18,26,27 have shown that APP has suppression effects on polymer dust explosion. Therefore, it is a candidate as an inert additive for the suppression of UPR dust explosion.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Experimental Apparatus For Explosion Severity Parametersmentioning

confidence: 99%

“…It is worth noting that the ignition energy of the chemical igniter was 2 kJ. 26 A typical plot of pressure vs time during dust explosion is shown in Figure 2.…”

Section: Experimental Apparatus For Explosion Severity Parametersmentioning

confidence: 99%

Section: Experimental Apparatus For Miementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…Castellanos et al [8] have analyzed the thermal stability of cornstarch with phosphates and determined the crucial role of particle size on improving the inhibiting rate of heat absorption. Yu et al [9] have investigated ammonium polyphosphate on explosion characteristics of micron-size acrylates copolymer powders. Addai et al [10] have compared the MIT of five different dust and six different gases.…”

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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Investigation on the Explosion and Combustion of Various Carbon–Starch Blended Dust

et al. 2020

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The effect of different carbon allotropes on the explosion and combustion of potato‐starch dust is preliminarily investigated by modified Hartmann tube and cone calorimeter (CC), using expandable graphite (EG), naturally flaky graphite, vermicular graphite, and carbon black as the dust suppressants, respectively. The results show that the maximum explosion pressure (Pmax) decreases from 0.66 to 0.39 MPa and the peak heat release rate reduces from 31.45 to13.64 kW·m−2 for the EG‐starch blended dust, due to the physically shielding effect of the fluffy and charring layer. It clarifies that the combustion of starch is mainly governed by Zhuralev–Lesokin–Tempelman 3D diffusion calculated by the modified Coats–Redfern integral method; the carbonaceous materials block the pyrolysis and migration of volatiles, leading to a decrease in DTGmax. It establishes a comprehensive method to evaluate the explosion and combustion of organic combustible dust, combining the CC with combustion kinetics effectively.

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Experimental investigation of the inerting effect of crystalline II type Ammonium Polyphosphate on explosion characteristics of micron-size Acrylates Copolymer dust

Cited by 43 publications

References 30 publications

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

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

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

Investigation on the Explosion and Combustion of Various Carbon–Starch Blended Dust

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