Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process
Abstract To test the effectiveness of N2 and CO2 in preventing coal from spontaneously combusting, researchers used an adiabatic oxidation apparatus to conduct an experiment with different temperature starting points. Non-adsorbed helium (He) was used as a reference gas, and coal and oxygen concentr...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-11-01
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| Series: | International Journal of Coal Science & Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40789-023-00652-y |
| _version_ | 1827635821898891264 |
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| author | Xiyang Fang Bo Tan Haiyan Wang |
| author_facet | Xiyang Fang Bo Tan Haiyan Wang |
| author_sort | Xiyang Fang |
| collection | DOAJ |
| description | Abstract To test the effectiveness of N2 and CO2 in preventing coal from spontaneously combusting, researchers used an adiabatic oxidation apparatus to conduct an experiment with different temperature starting points. Non-adsorbed helium (He) was used as a reference gas, and coal and oxygen concentration temperature variations were analyzed after inerting. The results showed that He had the best cooling effect, N2 was second, and CO2 was the worst. At 70℃ and 110℃, the impact of different gases on reducing oxygen concentration and the cooling effect was the same. However, at the starting temperature of 150℃, CO2 was less effective in lowering oxygen concentration at the later stage than He and N2. N2 and CO2 can prolong the flame retardation time of inert gas and reduce oxygen displacement with an initial temperature increase. When the starting temperature is the same, N2 injection cools coal samples and replaces oxygen more effectively than CO2 injection. The flame retardancy of inert gas is the combined result of the cooling effect of inert gas and the replacement of oxygen. These findings are essential for using inert flame retardant technology in the goaf. |
| first_indexed | 2024-03-09T15:32:49Z |
| format | Article |
| id | doaj.art-1081cfe5949149bb906102f443501a82 |
| institution | Directory Open Access Journal |
| issn | 2095-8293 2198-7823 |
| language | English |
| last_indexed | 2024-03-09T15:32:49Z |
| publishDate | 2023-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj.art-1081cfe5949149bb906102f443501a822023-11-26T12:09:15ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232023-11-0110111110.1007/s40789-023-00652-yComparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation processXiyang Fang0Bo Tan1Haiyan Wang2School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing)School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing)School of Civil and Resources Engineering, University of Science and TechnologyAbstract To test the effectiveness of N2 and CO2 in preventing coal from spontaneously combusting, researchers used an adiabatic oxidation apparatus to conduct an experiment with different temperature starting points. Non-adsorbed helium (He) was used as a reference gas, and coal and oxygen concentration temperature variations were analyzed after inerting. The results showed that He had the best cooling effect, N2 was second, and CO2 was the worst. At 70℃ and 110℃, the impact of different gases on reducing oxygen concentration and the cooling effect was the same. However, at the starting temperature of 150℃, CO2 was less effective in lowering oxygen concentration at the later stage than He and N2. N2 and CO2 can prolong the flame retardation time of inert gas and reduce oxygen displacement with an initial temperature increase. When the starting temperature is the same, N2 injection cools coal samples and replaces oxygen more effectively than CO2 injection. The flame retardancy of inert gas is the combined result of the cooling effect of inert gas and the replacement of oxygen. These findings are essential for using inert flame retardant technology in the goaf.https://doi.org/10.1007/s40789-023-00652-yCoal spontaneous combustionAdiabatic oxidationInert gas flame retardantFlame retardant efficiencyReplacement |
| spellingShingle | Xiyang Fang Bo Tan Haiyan Wang Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process International Journal of Coal Science & Technology Coal spontaneous combustion Adiabatic oxidation Inert gas flame retardant Flame retardant efficiency Replacement |
| title | Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process |
| title_full | Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process |
| title_fullStr | Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process |
| title_full_unstemmed | Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process |
| title_short | Comparative study on the flame retardancy of CO2 and N2 during coal adiabatic oxidation process |
| title_sort | comparative study on the flame retardancy of co2 and n2 during coal adiabatic oxidation process |
| topic | Coal spontaneous combustion Adiabatic oxidation Inert gas flame retardant Flame retardant efficiency Replacement |
| url | https://doi.org/10.1007/s40789-023-00652-y |
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