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Study on Secondary Oxidation Characteristics of Coal Gangue at Different Pyrolysis Rank by Chenguang Wang; Deming Wang; Haihui Xin; Zhangfan Qi; Wei Zhang; Kang Zhang is a Engineering article available to read on EtoBox.

What is Study on Secondary Oxidation Characteristics of Coal Gangue at Different Pyrolysis Rank about?

In order to further investigate the spontaneous combustion characteristics of coal gangue (CG) hills, this paper explored the potential connection between the spontaneous combustion characteristics of CG and its pyrolysis rank. Though the method of gas chromatography (GC) and mass spectrometry (MS), the temperature programmed experiments of CG samples with different pyrolysis ranks were carried out. The variation of index gas emission behavior and the oxidation kinetics of CG after high-temperature pyrolysis were investigated under the condition of heating from 30 °C to 900 °C. The results showed that there is a certain connection between the rank of pyrolysis of CG and its emission behavior and the thermodynamic parameter. The energy required for the combustion of samples after pre-pyrolysis were significantly higher than the raw sample. With the increase of the rank of pyrolysis, due to the decomposition of oxygen-containing functional groups in the process of pyrolysis, a large amount of volatiles were released, the CG in the combustion process of the emission of index gas and its oxygen consumption rate gradually reduced, the rapid oxidation stage shifted to the high temperatur

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Author

Chenguang Wang; Deming Wang; Haihui Xin; Zhangfan Qi; Wei Zhang; Kang Zhang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)