Research on the desorption law and multifractal characteristics of coal gas based on infrared radiation
Studying the infrared radiation (IR) variation during the coal gas desorption (CGD) process is a critical aspect in understanding and controlling abnormal coal gas emissions, and preventing coal gas disasters and accidents, such coal and gas outburst. We conducted IR experiments on CGD to analyze th...
| Authors: | , , , , , , , |
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| Format: | article |
| Publication Date: | 2024 |
| Country: | España |
| Institution: | Universitat Politècnica de Catalunya (UPC) |
| Repository: | UPCommons. Portal del coneixement obert de la UPC |
| Language: | English |
| OAI Identifier: | oai:upcommons.upc.edu:2117/421070 |
| Online Access: | https://hdl.handle.net/2117/421070 https://dx.doi.org/10.1016/j.fuel.2024.132744 |
| Access Level: | Embargoed access |
| Keyword: | Coal Gas desorption Infrared radiation Multifractal analysis Àrees temàtiques de la UPC::Enginyeria civil::Enginyeria de mines |
| Summary: | Studying the infrared radiation (IR) variation during the coal gas desorption (CGD) process is a critical aspect in understanding and controlling abnormal coal gas emissions, and preventing coal gas disasters and accidents, such coal and gas outburst. We conducted IR experiments on CGD to analyze the mechanisms and factors influencing changes in infrared radiation temperature (IRT), as well as to assess the multifractal characteristics. The results indicate that as gas desorption time increases, the average infrared radiation temperature difference (¿AIRT) of coal under varying adsorption equilibrium pressure (AEP) follows a double exponential downward trend. Concurrently, the differential infrared cloud image (DICI) transitions from a high temperature to a low temperature distribution state. The counts of infrared radiation temperature difference (¿IRT) in the DICI during CGD are normally distributed, with the classification count of ¿IRT in the interval showing an upward trend. The multifractal spectra of the DICI gradually change from a left hook to a right hook as gas desorption time increases, and its degree of opening increases when the CGD time and AEP are increased. Both multifractal spectral parameters ¿a and ¿f(a) increase with the rise in CGD time. The changes in IRT and its derivative parameters can effectively reflect the trend and distribution characteristics of the amount of CGD. These results provide a theoretical foundation for understanding the characteristics of CGD, real-time monitoring of abnormal changes in coal gas emission, and the prevention of coal and gas outbursts. |
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