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

Abstract 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 che...

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Autores principales:	Jinzhang Jia, Jinchao Zhu, Wenxing Niu, Jing Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6d01266584454727ac2d7f85e939c594
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spelling	oai:doaj.org-article:6d01266584454727ac2d7f85e939c5942021-12-02T16:15:06ZInfluence of acetylene on methane–air explosion characteristics in a confined chamber10.1038/s41598-021-93466-42045-2322https://doaj.org/article/6d01266584454727ac2d7f85e939c5942021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93466-4https://doaj.org/toc/2045-2322Abstract 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.Jinzhang JiaJinchao ZhuWenxing NiuJing ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jinzhang Jia Jinchao Zhu Wenxing Niu Jing Zhang Influence of acetylene on methane–air explosion characteristics in a confined chamber
description	Abstract 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.
format	article
author	Jinzhang Jia Jinchao Zhu Wenxing Niu Jing Zhang
author_facet	Jinzhang Jia Jinchao Zhu Wenxing Niu Jing Zhang
author_sort	Jinzhang Jia
title	Influence of acetylene on methane–air explosion characteristics in a confined chamber
title_short	Influence of acetylene on methane–air explosion characteristics in a confined chamber
title_full	Influence of acetylene on methane–air explosion characteristics in a confined chamber
title_fullStr	Influence of acetylene on methane–air explosion characteristics in a confined chamber
title_full_unstemmed	Influence of acetylene on methane–air explosion characteristics in a confined chamber
title_sort	influence of acetylene on methane–air explosion characteristics in a confined chamber
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6d01266584454727ac2d7f85e939c594
work_keys_str_mv	AT jinzhangjia influenceofacetyleneonmethaneairexplosioncharacteristicsinaconfinedchamber AT jinchaozhu influenceofacetyleneonmethaneairexplosioncharacteristicsinaconfinedchamber AT wenxingniu influenceofacetyleneonmethaneairexplosioncharacteristicsinaconfinedchamber AT jingzhang influenceofacetyleneonmethaneairexplosioncharacteristicsinaconfinedchamber
_version_	1718384295539638272

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

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