Ethylene gas explosion analysis under oxygen-enriched atmospheres in a 20-liter spherical vessel

Chen, Chin-Feng; Shu, Chi‐Min; Wu, Hongchun; Ho, Hsin-Hsiu; Ho, San-Ping

doi:10.1016/j.jlp.2017.05.022

Cited by 18 publications

(5 citation statements)

References 13 publications

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“…Formula ( 4 ) shows the mathematical expression for the model. The literature shows that this model's laminar burning velocity is not much different from the results obtained by other methods 35 , 51 – 53 . S L was calculated when the flame radius is greater than 6 mm to avoid the effects related to spark ignition, so the result can be considered an ideal spherical flame propagating outwards 25 , 54 .…”

Section: Resultsmentioning

confidence: 47%

Influence of acetylene on methane–air explosion characteristics in a confined chamber

Jia

Zhu

Niu³

et al. 2021

Sci Rep

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To study the impact of acetylene on methane explosions, the safe operation of coal mines should be ensured. In this paper, a 20 L spherical tank was used to study the explosive characteristics of acetylene–methane–air mixture. In addition, the GRI-Mech3.0 mechanism was used to study the chemical kinetic mechanism for the mixed gas, and the effect of adding acetylene on the sensitivity of methane and the yield of free radicals was analysed. The results show that acetylene can expand the scope for methane explosion, lower the lower explosion limit, and increase the risk of explosion. Acetylene increases the maximum explosion pressure, laminar combustion rate and maximum pressure rise rate for the methane–air mixture while shortening the combustion time. Three combustion modes for the acetylene–methane–air mixture were determined: methane-dominated, transitional and acetylene-dominated combustion modes. Chemical kinetic analysis for the mixed gas shows that as the volume fraction of acetylene increases, the generation rate for key free radicals (H*, O* and OH*) gradually increases, thereby increasing the intensity of the explosive reaction. The results from this research will help formulate measures to prevent coal mine explosion accidents.

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Section: Resultsmentioning

confidence: 47%

Influence of acetylene on methane–air explosion characteristics in a confined chamber

Jia

Zhu

Niu³

et al. 2021

Sci Rep

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“…As shown in Figure 4a,b the mixture explosiveness assessment was carried out considering pressure values P max and the explosion pressure rise rate (dP/dt) max [34]. To show the spectral radiation characteristics, the intensity (I) was recorded and analyzed as it is shown in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

The Choice of Optical Flame Detectors for Automatic Explosion Containment Systems Based on the Results of Explosion Radiation Analysis of Methane- and Dust-Air Mixtures

2022

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A review of the existing optoelectron monitoring devices revealed that the design of optoelectron detectors of the mine atmosphere does not sufficiently take into account the factor of external optical interference. This includes any extraneous source of thermal emission: a source of artificial lighting or enterprises. As a consequence, the optoelectron detectors -based safety systems currently installed at mining sites are not able to ensure properly the detection of the ignition source in the presence of optical interference. Thus, it is necessary to determine the working spectral wavelength ranges from methane and coal dust explosions. The article presents the results of experimental research devoted to the methane-air mixture and coal dust explosion spectral analysis by means of the photoelectric method. The ignition of a methane-air mixture of stoichiometric concentration (9.5%) and coal dust of size characterized by the dispersion of 63–94 microns and concentration of 200 g/m3 was carried out in a 20 L spherical chamber with an initial temperature in the setup of 18–22 °C at atmospheric pressure. Then, photometry of the explosion light flux was conducted on a photoelectric unit. Operating spectral wavelength ranges from methane and coal dust explosions were determined. For the methane-air mixture, it is advisable to use the spectral regions at the maximum emission of 390 and 900 nm. The spectrum section at the maximum emission of 620 nm was sufficient for dust-air mixture. It enabled us to select the wavelength ranges for automatic explosion suppression systems’ launching references. This will exclude false triggering of the explosion suppression system from other radiation sources. The research results will help to improve the decision-making credibility of the device in its direct design. The results will be used in further research to design noise-resistant optical flame detection sensors with a high response rate.

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“…17 With an increasing oxygen concentration in the ethylene explosion, there is a higher (d P /d t ) max and P max in a set of concentrations of ethylene. 18 Moreover, due to the greater reaction rate, burning velocities, and detonability, ethylene can be a fuel of interest in various practical engines, including turbines and scramjets. 19 It can be applied to hypersonic propulsion.…”

Section: Introductionmentioning

confidence: 99%

The dual effect and mechanism analysis of expanded aluminum on an ethylene explosion

Wang

Gao

Pan

et al. 2023

Sustainable Energy Fuels

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Ethylene gas explosion analysis under oxygen-enriched atmospheres in a 20-liter spherical vessel

Cited by 18 publications

References 13 publications

Influence of acetylene on methane–air explosion characteristics in a confined chamber

Influence of acetylene on methane–air explosion characteristics in a confined chamber

The Choice of Optical Flame Detectors for Automatic Explosion Containment Systems Based on the Results of Explosion Radiation Analysis of Methane- and Dust-Air Mixtures

The dual effect and mechanism analysis of expanded aluminum on an ethylene explosion

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