Suppression of polyethylene dust explosion by sodium bicarbonate

Wang, Yan; Lin, Chendi; Qi, Yingquan; Pei, Bei; Wang, Lanyun; Ji, Wentao

doi:10.1016/j.powtec.2020.03.049

Cited by 52 publications

(7 citation statements)

References 28 publications

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“…The inhibiting effects of NaHCO 3 on aluminum dust explosion are not only heat absorption but also isolation and chemical inhibition, − and those of Na 2 CO 3 contain isolation, chemical process, and little heat absorption. The heat absorbed by NaHCO 3 is much higher than Na 2 CO 3 based on the DSC curves.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Sodium bicarbonate (NaHCO 3 ) has been used as an inhibitor because it exhibits superior performance based on physical and chemical effects. − Wang et al and Jiang et al studied the effects of NaHCO 3 powder on polyethylene dust and pulverized biomass dust explosions and demonstrated that the explosions could be completely suppressed by NaHCO 3 . Dounia et al reported that NaHCO 3 particles decomposed in the flame front of premixed hydrocarbon/air, after which the resulting chemical reactions efficiently inhibited combustion.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on the Inhibition of Aluminum Dust Explosion by Sodium Bicarbonate and Its Solid Product Sodium Carbonate

Chen

Xiao

et al. 2021

ACS Omega

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To characterize the inhibiting effects of sodium bicarbonate (NaHCO 3 ) on aluminum dust, the inhibiting capacities of NaHCO 3 and its solid product sodium carbonate (Na 2 CO 3 ) on the explosions of 10 and 20 μm aluminum dusts were studied using a standard 20 L spherical chamber. Explosion parameters were analyzed based on the induction period and explosion stage to evaluate the inhibiting effects. The results show that the induction period of 10 μm aluminum dust explosion is 18.2 ms, which is shorter than that of 20 μm aluminum dust. Two aluminum dust explosions can be completely inhibited during the induction period when inert ratios of NaHCO 3 are 350 and 150%, respectively, but that is not observed after adding the corresponding amount of Na 2 CO 3 . When the inert ratio ranges from 0 to 150%, the physical effect of NaHCO 3 on 10 μm aluminum is poor and the chemical effect is the essential process. But as the inert ratio increased from 200% to 350%, the physical effect of NaHCO 3 is higher than the chemical effect, suggesting that the physical effect is the key factor. With the increase of NaHCO 3 , the physical effect increases gradually. However, the chemical effect changes little. The physical effects of NaHCO 3 including heat absorption and isolation play an essential role in the inhibiting process, which has a significant impact on the pyrolysis process and explosion parameters. The results of the present work provide guidance for the prevention and control of aluminum dust explosions.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation on the Inhibition of Aluminum Dust Explosion by Sodium Bicarbonate and Its Solid Product Sodium Carbonate

Chen

Xiao

et al. 2021

ACS Omega

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“…The particle size and shape of dust affected by moisture are related to dust explosion characteristics and increase the specific surface area, which is to increase the oxidation reaction area. It affected the explosion characteristics [18][19][20][21][22]. However, the relationship between the explosion of the dust and the moisture content is not only the above-mentioned inhibiting effect, but it may also be promoted under certain circumstances, such as fermentation of grain dust, redox reaction of metal dust, and water which cause combustible gases to be generated.…”

Section: Introductionmentioning

confidence: 99%

Effects of moisture content on explosion characteristics of incense dust in incense factory

Chang

Cheng

Zhang

et al. 2021

J Therm Anal Calorim

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Incense is an indispensable material with religion and life in Asia. It is also a bridge of cultural expression and inheritance. Because the operating environment concentration of dust generated during the production process is considerable, most of the research pertaining to the hazard of incense factories has investigated air pollution, such as PM2.5, PM10, and VOCs. However, the production of incense causes dust dispersion, high temperature from ovens, and static electricity generated by friction. It can all possibly lead a dust explosion. To prevent and alleviate hazard from re-occurring, we used sandalwood dust at an incense factory in Taiwan, measured the effect of moisture content on the explosion parameters under normal conditions by 20-L apparatus, and used the oven to diminish its moisture content to 0%, 10.0%, and 15.0% as a control group to analyze the explosion characteristics at the different moisture contents, such as maximum explosion pressure and explosion limit. The results showed that the minimum ignition energy of dry dust was 30 mJ. Beyond doubt, incense factories face potential explosion hazards. The above results could be evaluated by the most dangerous range to avoid incense dust in this range at the workplace, lessening hazards caused by a dust explosion. The effect of moisture content on the suppression of the dust explosion was explored.

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“…Several researchers have studied the flame propagation characteristics of polyethylene dust explosions. For instance, the effects of dust concentration [19][20][21], particle size [19,20] and inert medium [22][23][24] on the flame morphology, front structure and explosion flame propagation velocity of polyethylene dust have been studied. However, the existence of ethylene affects the pyrolysis, volatilization and other dynamic characteristics of polyethylene dust particles to a certain extent, thereby increasing the complexity of the polyethylene dust explosion process.…”

Section: Introductionmentioning

confidence: 99%

Flame Propagation Characteristics of Hybrid Explosion of Ethylene and Polyethylene Mixture under Pressure Accumulation

Yang

et al. 2022

Energies

Self Cite

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In order to study the flame propagation characteristics of a ethylene/polyethylene hybrid explosion under pressure accumulation, a visual pressure-bearing gas/power hybrid-explosion experimental platform was built. The flame propagation characteristics of polyethylene and ethylene/polyethylene hybrid explosions in the closed vessel were analyzed. The results show that the flame brightness, flame front continuity and average flame propagation velocity of polyethylene dust explosion in the closed vessel increased first and then decreased when the polyethylene dust concentration increased. The curve of the flame propagation velocity with time had obvious pulsation characteristics. Adding 1% and 3% ethylene to different concentrations of polyethylene dust significantly improved its explosion flame brightness, flame front continuity and average flame propagation velocity. Moreover, it also improved the fluctuation amplitude of the explosion flame propagation velocity with time curve. The explosion flame of the polyethylene dust and ethylene/polyethylene hybrid mixture included four zones during the propagation process, which were denoted as the unburned zone, preheated zone, premixed flame zone and dust flame zone. The addition of ethylene to polyethylene dust can significantly increase its thickness of premixed flame zone and preheated zone, and the thickness increased when the ethylene concentration increased.

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Suppression of polyethylene dust explosion by sodium bicarbonate

Cited by 52 publications

References 28 publications

Investigation on the Inhibition of Aluminum Dust Explosion by Sodium Bicarbonate and Its Solid Product Sodium Carbonate

Investigation on the Inhibition of Aluminum Dust Explosion by Sodium Bicarbonate and Its Solid Product Sodium Carbonate

Effects of moisture content on explosion characteristics of incense dust in incense factory

Flame Propagation Characteristics of Hybrid Explosion of Ethylene and Polyethylene Mixture under Pressure Accumulation

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