@Article{EE.2021.015413,
AUTHOR = {Ang Li, Peng Lei, Changkun Chen, Tong Xu},
TITLE = {A Simplified Model for SO<sub>2</sub> Generation during Spontaneous Combustion of Coal Gangue},
JOURNAL = {Energy Engineering},
VOLUME = {118},
YEAR = {2021},
NUMBER = {5},
PAGES = {1469--1482},
URL = {http://www.techscience.com/energy/v118n5/43818},
ISSN = {1546-0118},
ABSTRACT = {A simplified model for SO<sub>2</sub> 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 SO<sub>2</sub> generation were discussed. The results showed that, higher initial temperature inside the gangue could accelerate the oxidation rate of FeS<sub>2</sub> and increase the maximum concentration of SO<sub>2</sub>. If initial temperature inside the gangue increased by about 37%, the total SO<sub>2</sub> generation increased by 166%. Fresh air supply had less significant effect on the oxidation rate of FeS<sub>2</sub>. However, the higher the fresh air supply was, the more FeS<sub>2</sub> could be oxidized, which ultimately produced more SO<sub>2</sub>. 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 SO<sub>2</sub> within acceptable accuracy. Besides, this method provides a useful prototype to predict the generation of hazardous materials, such as CO, NO<sub>x,</sub> and chlorine during the spontaneous combustion of coal gangue.},
DOI = {10.32604/EE.2021.015413}
}