Taking five coal
samples (FCSs) in Xinjiang as the research object,
characterizations such as proximate analysis, ultimate analysis, Fourier
transform infrared (FTIR), and thermogravimetry-differential thermal
analysis (TG-DTG) were carried out. The Coats–Redfern model
was used to simulate pyrolysis kinetics of FCSs under different reaction
orders (ROs). The results showed that except for HSBC, the R
2 of the other four coal samples are all higher
than 0.9, which showed a good correlation effect. FCSs present similar
reaction activation energy in the same RO and temperature range. Results
of FTIR showed that the hydroxyl groups of FCSs, in the range of 3100–3600
cm–1, were mainly self-associated hydroxyl hydrogen
bonds and hydroxyl π bonds, and they occupied over 63%. Among
them, the pyrolysis characteristic index (D) of XBC
was 4.139 × 10–6, higher than those of other
samples, and it showed good pyrolysis performance. Moreover, by reducing
the temperature range appropriately, the fitting results showed a
better correlation effect.
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