Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust
In a humid environment, active metal magnesium is susceptible to the hydrogen evolution reaction with water, which significantly increases the risk of explosions in areas where magnesium is produced and used. In this paper, the effects of equilibrium relative humidity (ERH) on the explosion characte...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-11-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956723001743 |
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| author | Xinyu Xiong Kai Gao Changquan Ji Jie Mu Bin Li Dan Zhang Yadong Xu Lifeng Xie |
| author_facet | Xinyu Xiong Kai Gao Changquan Ji Jie Mu Bin Li Dan Zhang Yadong Xu Lifeng Xie |
| author_sort | Xinyu Xiong |
| collection | DOAJ |
| description | In a humid environment, active metal magnesium is susceptible to the hydrogen evolution reaction with water, which significantly increases the risk of explosions in areas where magnesium is produced and used. In this paper, the effects of equilibrium relative humidity (ERH) on the explosion characteristics parameters of magnesium dust under various initial conditions (concentration, particle size and temperature) were studied using a 20 L explosion device. Additionally, the explosion mechanism was thoroughly analyzed by incorporating the oxygen content results of the explosion products. The research revealed that explosion characteristics parameters (Pmax, (dp/dt)max) of magnesium dust cloud initially increased and then decreased with rising ERH when the explosion system was in an “oxygen-rich” state. The maximum increments in Pmax and (dp/dt)max are 130 kPa and 10.73 kPa/ms, respectively. Moreover, a decrease in particle size and an increase in temperature facilitated the generation of more hydrogen from the humid magnesium dust. This phenomenon effectively improved the explosion characteristics parameters of the humid magnesium dust, thereby increasing the sensitivity and risk of the explosion system. However, in the case of a high degree of “oxygen-poor” state, the derived hydrogen instead became burdensome, resulting in an excessive amount of magnesium dust that was unavailable for reaction. This led to a decrease in the explosion characteristics parameters of humid magnesium dust, with the maximum decreases in Pmax and (dp/dt)max being 45.8 kPa and 2.1 kPa/ms respectively. |
| format | Article |
| id | doaj-art-3a775485790b4b1dbda2139e6dc8caa4 |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-3a775485790b4b1dbda2139e6dc8caa42025-01-05T04:28:01ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672024-11-01121146674681Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dustXinyu Xiong0Kai Gao1Changquan Ji2Jie Mu3Bin Li4Dan Zhang5Yadong Xu6Lifeng Xie7Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China; Zhejiang Academy of Emergency Management Science, Key Laboratory of Safety Engineering and Technology Research of Zhejiang Province, Hangzhou 310012, Zhejiang, ChinaNanjing University of Science and Technology, Nanjing 210094, Jiangsu, ChinaNanjing University of Science and Technology, Nanjing 210094, Jiangsu, ChinaZhejiang Academy of Emergency Management Science, Key Laboratory of Safety Engineering and Technology Research of Zhejiang Province, Hangzhou 310012, Zhejiang, ChinaNanjing University of Science and Technology, Nanjing 210094, Jiangsu, ChinaNanjing University of Science and Technology, Nanjing 210094, Jiangsu, ChinaNanjing University of Science and Technology, Nanjing 210094, Jiangsu, China; Corresponding authors.Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China; Corresponding authors.In a humid environment, active metal magnesium is susceptible to the hydrogen evolution reaction with water, which significantly increases the risk of explosions in areas where magnesium is produced and used. In this paper, the effects of equilibrium relative humidity (ERH) on the explosion characteristics parameters of magnesium dust under various initial conditions (concentration, particle size and temperature) were studied using a 20 L explosion device. Additionally, the explosion mechanism was thoroughly analyzed by incorporating the oxygen content results of the explosion products. The research revealed that explosion characteristics parameters (Pmax, (dp/dt)max) of magnesium dust cloud initially increased and then decreased with rising ERH when the explosion system was in an “oxygen-rich” state. The maximum increments in Pmax and (dp/dt)max are 130 kPa and 10.73 kPa/ms, respectively. Moreover, a decrease in particle size and an increase in temperature facilitated the generation of more hydrogen from the humid magnesium dust. This phenomenon effectively improved the explosion characteristics parameters of the humid magnesium dust, thereby increasing the sensitivity and risk of the explosion system. However, in the case of a high degree of “oxygen-poor” state, the derived hydrogen instead became burdensome, resulting in an excessive amount of magnesium dust that was unavailable for reaction. This led to a decrease in the explosion characteristics parameters of humid magnesium dust, with the maximum decreases in Pmax and (dp/dt)max being 45.8 kPa and 2.1 kPa/ms respectively.http://www.sciencedirect.com/science/article/pii/S2213956723001743Derived hydrogenDust agglomerationHybrid reactionMultiple systemsExplosion product |
| spellingShingle | Xinyu Xiong Kai Gao Changquan Ji Jie Mu Bin Li Dan Zhang Yadong Xu Lifeng Xie Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust Journal of Magnesium and Alloys Derived hydrogen Dust agglomeration Hybrid reaction Multiple systems Explosion product |
| title | Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust |
| title_full | Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust |
| title_fullStr | Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust |
| title_full_unstemmed | Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust |
| title_short | Effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust |
| title_sort | effect of equilibrium relative humidity on explosion characteristics parameters of humid magnesium dust |
| topic | Derived hydrogen Dust agglomeration Hybrid reaction Multiple systems Explosion product |
| url | http://www.sciencedirect.com/science/article/pii/S2213956723001743 |
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