Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines
Coal dust endangers the health and safety of workers in underground coal mines. Therefore, developing coal dust suppressants with dust prevention and explosion-proof properties is critical. The influence of molasses on the explosion and decomposition of the coal dust deposited in underground mines w...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/6/2758 |
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| author | Jianguo Liu Minglei Lin Longzhe Jin Gang Li Shengnan Ou Yapeng Wang Tianyang Wang Mulati Jueraiti Yunqi Tian Jiahui Wang |
| author_facet | Jianguo Liu Minglei Lin Longzhe Jin Gang Li Shengnan Ou Yapeng Wang Tianyang Wang Mulati Jueraiti Yunqi Tian Jiahui Wang |
| author_sort | Jianguo Liu |
| collection | DOAJ |
| description | Coal dust endangers the health and safety of workers in underground coal mines. Therefore, developing coal dust suppressants with dust prevention and explosion-proof properties is critical. The influence of molasses on the explosion and decomposition of the coal dust deposited in underground mines was investigated using 20 L explosion experiments and thermogravimetric and differential thermal analysis (TG-DTA). Findings reveal that, first, molasses can weakly promote the explosion of coal dust at low coal dust concentrations (<400 g/m<sup>3</sup>) but has no significant effect on the explosion at high coal dust concentrations (≥400 g/m<sup>3</sup>). Second, the decomposition process of the coal dust mixed with molasses has three stages: the moisture evaporation stage (0–150 °C), the molasses decomposition stage (150–300 °C), and the coal dust decomposition stage (300–500 °C). Molasses oxidation consumes oxygen and releases heat; at low coal dust concentrations, the released heat can promote coal dust decomposition to produce combustible gas, enhancing the coal dust explosion; at high coal dust concentrations, under the co-influence of the heat generation and oxygen consumption, molasses has no effect on the coal dust explosion. This is the mechanism of which molasses influences coal dust explosions. |
| first_indexed | 2024-03-11T06:36:32Z |
| format | Article |
| id | doaj.art-1e566f35dc22406faa556d2dff73184f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T06:36:32Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-1e566f35dc22406faa556d2dff73184f2023-11-17T10:50:34ZengMDPI AGEnergies1996-10732023-03-01166275810.3390/en16062758Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground MinesJianguo Liu0Minglei Lin1Longzhe Jin2Gang Li3Shengnan Ou4Yapeng Wang5Tianyang Wang6Mulati Jueraiti7Yunqi Tian8Jiahui Wang9NHC Key Laboratory for Engineering Control of Dust Hazard, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaNHC Key Laboratory for Engineering Control of Dust Hazard, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Safety and Health for Metal Mine, Maanshan 243000, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaCollege of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaCoal dust endangers the health and safety of workers in underground coal mines. Therefore, developing coal dust suppressants with dust prevention and explosion-proof properties is critical. The influence of molasses on the explosion and decomposition of the coal dust deposited in underground mines was investigated using 20 L explosion experiments and thermogravimetric and differential thermal analysis (TG-DTA). Findings reveal that, first, molasses can weakly promote the explosion of coal dust at low coal dust concentrations (<400 g/m<sup>3</sup>) but has no significant effect on the explosion at high coal dust concentrations (≥400 g/m<sup>3</sup>). Second, the decomposition process of the coal dust mixed with molasses has three stages: the moisture evaporation stage (0–150 °C), the molasses decomposition stage (150–300 °C), and the coal dust decomposition stage (300–500 °C). Molasses oxidation consumes oxygen and releases heat; at low coal dust concentrations, the released heat can promote coal dust decomposition to produce combustible gas, enhancing the coal dust explosion; at high coal dust concentrations, under the co-influence of the heat generation and oxygen consumption, molasses has no effect on the coal dust explosion. This is the mechanism of which molasses influences coal dust explosions.https://www.mdpi.com/1996-1073/16/6/2758coal dustmolassescoal dust explosionsuppression performanceTG-DTA |
| spellingShingle | Jianguo Liu Minglei Lin Longzhe Jin Gang Li Shengnan Ou Yapeng Wang Tianyang Wang Mulati Jueraiti Yunqi Tian Jiahui Wang Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines Energies coal dust molasses coal dust explosion suppression performance TG-DTA |
| title | Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines |
| title_full | Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines |
| title_fullStr | Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines |
| title_full_unstemmed | Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines |
| title_short | Influence of Molasses on the Explosion and Decomposition Properties of the Coal Dust Deposited in Underground Mines |
| title_sort | influence of molasses on the explosion and decomposition properties of the coal dust deposited in underground mines |
| topic | coal dust molasses coal dust explosion suppression performance TG-DTA |
| url | https://www.mdpi.com/1996-1073/16/6/2758 |
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