Spontaneous combustion liability between coal seams: A thermogravimetric study
The spontaneous combustion liability of coal can be determined by using different experimental techniques. These techniques are well-known in their application, but no certain test method has become a standard to prove the reliability of all of them. A general characterisation which included proxima...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-09-01
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| Series: | International Journal of Mining Science and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268619301727 |
| _version_ | 1828172447298355200 |
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| author | Moshood Onifade Bekir Genc Samson Bada |
| author_facet | Moshood Onifade Bekir Genc Samson Bada |
| author_sort | Moshood Onifade |
| collection | DOAJ |
| description | The spontaneous combustion liability of coal can be determined by using different experimental techniques. These techniques are well-known in their application, but no certain test method has become a standard to prove the reliability of all of them. A general characterisation which included proximate and ultimate analyses, petrographic properties and spontaneous combustion tests (thermogravimetric analysis (TGA) and the Wits-Ehac tests) were conducted on fourteen coal and four coal-shale samples. The spontaneous combustion liability of these samples collected between coal seams (above and below) were predicted using the TGA and the Wits-Ehac tests. Six different heating rates (3, 6, 9, 15, 20 and 25 °C/min) were selected based on the deviation coefficient to obtain different derivative slopes and a liability index termed the TGspc index. This study found that coal and coal-shale undergo spontaneous combustion between coal seams when exposed to oxygen in the air. Their intrinsic properties and proneness towards spontaneous combustion differ considerably from one seam to the other. The Wits-Ehac test results agreed with the TGspc results to a certain extent and revealed the incidents of spontaneous combustion in the coal mines. |
| first_indexed | 2024-04-12T03:41:30Z |
| format | Article |
| id | doaj.art-e20e92e80b6041fb8d232aa3512d97b7 |
| institution | Directory Open Access Journal |
| issn | 2095-2686 |
| language | English |
| last_indexed | 2024-04-12T03:41:30Z |
| publishDate | 2020-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Mining Science and Technology |
| spelling | doaj.art-e20e92e80b6041fb8d232aa3512d97b72022-12-22T03:49:16ZengElsevierInternational Journal of Mining Science and Technology2095-26862020-09-01305691698Spontaneous combustion liability between coal seams: A thermogravimetric studyMoshood Onifade0Bekir Genc1Samson Bada2Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam; Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Viet Nam; Corresponding author.School of Mining Engineering, University of the Witwatersrand, Johannesburg 2050, South AfricaClean Coal and Sustainable Energy Research Group, Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg 2050, South AfricaThe spontaneous combustion liability of coal can be determined by using different experimental techniques. These techniques are well-known in their application, but no certain test method has become a standard to prove the reliability of all of them. A general characterisation which included proximate and ultimate analyses, petrographic properties and spontaneous combustion tests (thermogravimetric analysis (TGA) and the Wits-Ehac tests) were conducted on fourteen coal and four coal-shale samples. The spontaneous combustion liability of these samples collected between coal seams (above and below) were predicted using the TGA and the Wits-Ehac tests. Six different heating rates (3, 6, 9, 15, 20 and 25 °C/min) were selected based on the deviation coefficient to obtain different derivative slopes and a liability index termed the TGspc index. This study found that coal and coal-shale undergo spontaneous combustion between coal seams when exposed to oxygen in the air. Their intrinsic properties and proneness towards spontaneous combustion differ considerably from one seam to the other. The Wits-Ehac test results agreed with the TGspc results to a certain extent and revealed the incidents of spontaneous combustion in the coal mines.http://www.sciencedirect.com/science/article/pii/S2095268619301727Crossing-point temperatureThermogravimetric analysisWits-Ehac indexTGspc index |
| spellingShingle | Moshood Onifade Bekir Genc Samson Bada Spontaneous combustion liability between coal seams: A thermogravimetric study International Journal of Mining Science and Technology Crossing-point temperature Thermogravimetric analysis Wits-Ehac index TGspc index |
| title | Spontaneous combustion liability between coal seams: A thermogravimetric study |
| title_full | Spontaneous combustion liability between coal seams: A thermogravimetric study |
| title_fullStr | Spontaneous combustion liability between coal seams: A thermogravimetric study |
| title_full_unstemmed | Spontaneous combustion liability between coal seams: A thermogravimetric study |
| title_short | Spontaneous combustion liability between coal seams: A thermogravimetric study |
| title_sort | spontaneous combustion liability between coal seams a thermogravimetric study |
| topic | Crossing-point temperature Thermogravimetric analysis Wits-Ehac index TGspc index |
| url | http://www.sciencedirect.com/science/article/pii/S2095268619301727 |
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