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A Simplified Model for SO2 Generation during Spontaneous Combustion of Coal Gangue

Ang Li1,2, Peng Lei1,*, Changkun Chen1, Tong Xu1

1 Institute of Disaster Prevention Science and Safety Technology, Central South University, Changsha, 410075, China
2 College of Forestry, Inner Mongolia Agricultural University, Hohhot, 010019, China

* Corresponding Author: Peng Lei. Email: email

Energy Engineering 2021, 118(5), 1469-1482. https://doi.org/10.32604/EE.2021.015413

Abstract

A simplified model for SO2 generation during spontaneous combustion of coal gangue was put forward and validated using the measured data. Using the proposed model, the effects of initial temperature inside the gangue and fresh air supply on SO2 generation were discussed. The results showed that, higher initial temperature inside the gangue could accelerate the oxidation rate of FeS2 and increase the maximum concentration of SO2. If initial temperature inside the gangue increased by about 37%, the total SO2 generation increased by 166%. Fresh air supply had less significant effect on the oxidation rate of FeS2. However, the higher the fresh air supply was, the more FeS2 could be oxidized, which ultimately produced more SO2. Although the computed results and the measured data concerning the inner locations inside the gangue had a certain degree of error, the proposed model can provide a relatively precise total release of SO2 within acceptable accuracy. Besides, this method provides a useful prototype to predict the generation of hazardous materials, such as CO, NOx, and chlorine during the spontaneous combustion of coal gangue.

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APA Style
Li, A., Lei, P., Chen, C., Xu, T. (2021). A simplified model for so2 generation during spontaneous combustion of coal gangue. Energy Engineering, 118(5), 1469-1482. https://doi.org/10.32604/EE.2021.015413
Vancouver Style
Li A, Lei P, Chen C, Xu T. A simplified model for so2 generation during spontaneous combustion of coal gangue. Energ Eng. 2021;118(5):1469-1482 https://doi.org/10.32604/EE.2021.015413
IEEE Style
A. Li, P. Lei, C. Chen, and T. Xu "A Simplified Model for SO2 Generation during Spontaneous Combustion of Coal Gangue," Energ. Eng., vol. 118, no. 5, pp. 1469-1482. 2021. https://doi.org/10.32604/EE.2021.015413



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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