Inerting effects of ammonium polyphosphate on explosion characteristics of polypropylene dust

Yang, Jie; Yu, Yuan; Li, Yunhao; Zhang, Qingwu; Zheng, Longjiang; Luo, Taiyu; Suo, Yifan; Jiang, Juncheng

doi:10.1016/j.psep.2019.08.015

Cited by 41 publications

(13 citation statements)

References 35 publications

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“…By comparing the suppression effects of two groups of inert powders (NaHCO 3 and Na 2 C 2 O 4 , KHCO 3 and K 2 C 2 O 4 ) on the MIT and MIE of PE dusts, the effects of two acid radical ions (bicarbonate ion and oxalate ion) were compared and analyzed. The results show that the two acid radical ions both present great suppression effects on the MIT and MIE of PE dusts, but the suppression effect of the bicarbonate ion was better than that of the oxalate ion when the inert powders were of the same particle size distribution and had the same metal cation.…”

Section: Discussionmentioning

confidence: 99%

“…In order to compare and analyze the effects of two acid radical ions (bicarbonate ion and oxalate ion) on the MIT and MIE of PE dusts, the four inert powders were divided into two groups (NaHCO 3 and Na 2 C 2 O 4 as the first group and KHCO 3…”

Section: Comparison Between the Two Acid Radical Ionsmentioning

confidence: 99%

“…Therefore, taking some measures to raise the MIT and MIE of combustible dusts is necessary to reduce the ignition sensitivity of combustible dusts.In the past few decades, many investigations have focused on increasing the MIT and MIE of combustible dusts by adding an inert substance. Yang et al [2,3] investigated the inerting effects of CO 2 on the MIT and MIE of micron-size acrylate copolymer (ACR) dusts. When the CO 2 concentration reached 40% of the volume, the MIT and MIE of ACR dusts increased by 50 • C and 257 mJ, respectively.…”

mentioning

confidence: 99%

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Investigation into the Suppression Effects of Inert Powders on the Minimum Ignition Temperature and the Minimum Ignition Energy of Polyethylene Dust

Lin

Gan

et al. 2020

Processes

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The risks associated with dust explosions still exist in industries that either process or handle combustible dust. This explosion risk could be prevented or mitigated by applying the principle of inherent safety. One effective principle is to add an inert material to a highly combustible material in order to decrease its ignition sensitivity. This paper deals with an experimental investigation of the influence of inert dust on the minimum ignition temperature and the minimum explosion energy of combustible dust. The experiments detailed here were performed in a Godbert–Greenwald (GG) furnace and a 1.2 L Hartmann tube. The combustible dust (polyethylene—PE; 800 mesh) and four inert powders (NaHCO3, Na2C2O4, KHCO3, and K2C2O4) were used. The suppression effects of the four inert powders on the minimum ignition temperature and the minimum explosion energy of the PE dust have been evaluated and compared with each other. The results show that all of the four different inert dusts have an effective suppression effect on the minimum ignition temperature and the minimum explosion energy of PE dust. However, the comparison of the results indicates that the suppression effect of bicarbonate dusts is better than that of oxalate dust. For the same kind of bicarbonate dusts, the suppression effects of potassium salt dusts are better than those of the sodium salt. The possible mechanisms for the better suppression effects of bicarbonate dusts and potassium salt dusts have been analyzed here.

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Section: Discussionmentioning

confidence: 99%

Section: Comparison Between the Two Acid Radical Ionsmentioning

confidence: 99%

mentioning

confidence: 99%

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Investigation into the Suppression Effects of Inert Powders on the Minimum Ignition Temperature and the Minimum Ignition Energy of Polyethylene Dust

Lin

Gan

et al. 2020

Processes

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“…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%

“…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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Investigation on suppression of melamine polyphosphate on acrylonitrile‐butadiene‐styrene dust explosion

Song

Luo

et al. 2021

Process Safety Progress

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There is a possibility of dust explosion during acrylonitrile-butadiene-styrene (ABS) production including cutting, grinding and machining. The suppression effect of melamine polyphosphate (MPP) on the explosion severity and ignition sensitivity of ABS dust, including maximum explosion pressure (P max ), maximum explosion index (K st ), minimum ignition energy (MIE) and minimum ignition temperature (MIT), was systematically investigated. MPP had an inhibitory effect on ABS dust explosion, and the explosion suppression effect was proportional to the mass fraction of MPP. Through the analysis on thermal decomposition behavior, gas-phase products and the explosion residue, the explosion suppression mechanism of MPP on the ABS dust was studied and proposed. According to the thermal analysis and explosion residue analysis results, it could be seen that the addition of MPP improved the thermal stability of the ABS dust and promoted the formation of dense carbon on the surface of ABS particles. Gas-phase products results showed that thermal decomposition of MPP produced NH 3 , CO 2 and H 2 O, which consumed and diluted the oxygen concentration in the explosion zone.

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Inerting effects of ammonium polyphosphate on explosion characteristics of polypropylene dust

Cited by 41 publications

References 35 publications

Investigation into the Suppression Effects of Inert Powders on the Minimum Ignition Temperature and the Minimum Ignition Energy of Polyethylene Dust

Investigation into the Suppression Effects of Inert Powders on the Minimum Ignition Temperature and the Minimum Ignition Energy of Polyethylene Dust

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

Investigation on suppression of melamine polyphosphate on acrylonitrile‐butadiene‐styrene dust explosion

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