Hazards of Propylene Oxide Aerosols in the Secondary Explosion

Du, Qing-lei; Liang, Huimin; Zhang, Qi

doi:10.1080/00102202.2021.1939320

Cited by 10 publications

(4 citation statements)

References 26 publications

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“…PO, as well as other alkylene oxides, is a highly toxic and harmful substance with several concerns correlated also to its difficult handling, flammability, and explosivity. 184,185 An alternative method was investigated by Avérous et al in 2016, 186 performing oxypropylation on con-densed tannins, the second most abundant source of renewable aromatic structures, with propylene carbonate (PC). In particular, PC was utilized as a replacement for PO in tannin functionalization and optimization of the reaction conditions was carried out.…”

Section: Hydroxyl Group Functionalized Ligninmentioning

confidence: 99%

From waste to resource: advancements in sustainable lignin modification

Libretti,

Santos Correa,

Meier

2024

Green Chem.

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Section: Hydroxyl Group Functionalized Ligninmentioning

confidence: 99%

From waste to resource: advancements in sustainable lignin modification

Libretti,

Santos Correa,

Meier

2024

Green Chem.

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“…In terms of secondary explosion research, Song and Li 29 carried out experimental research on the propagation characteristics of secondary explosion caused by coal dust by using pipeline equipment and found that the air velocity increased significantly. Du et al 30 studied the secondary explosion of epoxy propylene aerosol. Zhang et al 31 studied the secondary explosion of the gasoline/ gas mixture in a closed tunnel and obtained four reasons for secondary explosion of gasoline/gas.…”

Section: Introductionmentioning

confidence: 99%

Secondary Explosion Characteristics and Chemical Kinetics of CH₄/Air Induced by a High-Temperature Surface

Wang,

Zhang,

Wei

et al. 2023

ACS Chem. Health Saf.

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The gas explosion induced by the high-temperature surface of coal spontaneous combustion in goaf will cause a devastating blow to personnel and equipment in the process of coal mining. Secondary explosion may be induced by the high-temperature surface of coal spontaneous combustion after primary explosion with the continuous emission of gas and the ventilation of goaf. This will lead to new disasters for the ongoingrescue operation. A high-temperature source explosion experimental system consistent with the similarity and unity of goaf was designed and developed based on the similarity criterion in this study. A CH4/air explosion experiment was carried out with the high-temperature surface as an ignition source. The characteristics of secondary explosion were studied, and chemical kinetics was analyzed. It is of great significance to the safety of the process of mining production. The results show that the secondary explosion limit (6.5–14%) is less than the primary explosion (5.5–14.5%). Its explosion risk (F) is reduced by 15.6%. The key parameters P max, T max, and (dP /dt)max of secondary explosion at each concentration are lower than those of primary explosion. The t e of secondary explosion is higher than primary explosion. The most dangerous concentration of primary and secondary explosions induced by the high-temperature surface is 11.5%. Carbon oxides (CO2 and CO) and C2 hydrocarbon gases (C2H2, C2H4, and C2H6) are generated after primary explosion. The chemical kinetics of secondary explosion was analyzed with CHEMKIN Pro 2021. When the CH4 concentration is <11.5%, the formation of the key free radicals ·H, ·O, ·OH, and CH2O is inhibited due to the formation of CO2. When the CH4 concentration is ≥11.5%, the formation of the key free radicals ·H, ·O, ·OH, and CH2O is inhibited due to the generation of combustible gases (C2H2, C2H4, C2H6, and CO) and inert gas (CO2). As a result, the limit range of secondary explosion and the explosion hazard characteristics are reduced. R156 and R158 played major roles in the process of secondary explosion with the analysis of reaction sensitivity.

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“…Although considerable efforts are being made to understand the kinetics of this conversion, the detailed mechanism of the epoxidation process is still unclear. , Large-scale production of PO is often considered dangerous due to a high volatility, high flammability, and wide explosion limits of PO . In this regard, it is also considered as a model and practical fuel-air explosive. − Thus, extensive experimental and numerical studies of PO/air explosion mechanisms have been carried out using simplified and detailed kinetic schemes.…”

Section: Introductionmentioning

confidence: 99%

“… 7 In this regard, it is also considered as a model and practical fuel-air explosive. 8 − 10 Thus, extensive experimental and numerical studies of PO/air explosion mechanisms have been carried out using simplified 11 and detailed 9 kinetic schemes.…”

Section: Introductionmentioning

confidence: 99%

Propylene Oxide Addition Effect on the Chemical Speciation of a Fuel-Rich Premixed n-Heptane/Toluene Flame

et al. 2022

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1,2-Propylene oxide (PO, C 3 H 6 O) is considered as a promising agent for improving fuel. In this work, the effect of PO additives on the species pool in a premixed burner-stabilized fuel-rich (ϕ = 1.6) flame fueled by n-heptane/ toluene mixture (7/3 by volume of liquids) at atmospheric pressure is studied by the flame-sampling molecular beam mass spectrometry and numerical modeling in order to get insight into the chemical aspects of the influence of oxygenates with an epoxy group on the formation of abundant intermediates (including PAH precursors) during combustion of fossil fuels. The flames with various loadings of PO in the fuel blend (from 0 to 16.3% in mole basis) are examined, and detailed kinetic mechanisms available in the literature are validated against the measurements of mole fraction profiles of reactants, major products, and many intermediate species. A higher reactivity of the fresh mixture and a reduction in the peak mole fractions of intermediates playing an important role in PAH formation (benzene, styrene, ethylbenzene, phenol, acetylene, diacetylene, etc.) are observed when PO is added. This was found to be due to simultaneously two factors: the partial replacement of "sooting" fuel (toluene, which is the main precursor of these species) with oxygenated additive, and the changes in the flame radical pool caused by PO addition. Propylene oxide additive was found to change the ratio between H, OH, O, and CH 3 toward an increase in the proportion of O and CH 3 . The detailed kinetic mechanisms considered in the work are found to overpredict the peak mole fraction of acetylene, a key species playing a crucial role in PAH growth. Its chemistry is revisited in order to provide a better prediction of C 2 H 2 and, as a result, PAHs.

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Hazards of Propylene Oxide Aerosols in the Secondary Explosion

Cited by 10 publications

References 26 publications

From waste to resource: advancements in sustainable lignin modification

From waste to resource: advancements in sustainable lignin modification

Secondary Explosion Characteristics and Chemical Kinetics of CH₄/Air Induced by a High-Temperature Surface

Propylene Oxide Addition Effect on the Chemical Speciation of a Fuel-Rich Premixed n-Heptane/Toluene Flame

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Hazards of Propylene Oxide Aerosols in the Secondary Explosion

Cited by 10 publications

References 26 publications

From waste to resource: advancements in sustainable lignin modification

From waste to resource: advancements in sustainable lignin modification

Secondary Explosion Characteristics and Chemical Kinetics of CH4/Air Induced by a High-Temperature Surface

Propylene Oxide Addition Effect on the Chemical Speciation of a Fuel-Rich Premixed n-Heptane/Toluene Flame

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Secondary Explosion Characteristics and Chemical Kinetics of CH₄/Air Induced by a High-Temperature Surface