Table 5 Peak fitting parameters for the FTIR spectrum of WS raw coal in the region of 1800–1600 cm−1.

From: Study on the Change of Dielectric Properties and Chemical-Mechanism during Coal Low-Temperature Oxidation

Peak

Center (cm−1)

Assignment

1

1740

Esters

2

1724

Esters

3

1701

Carboxylic acid

4

1678

Conjugated C=O

5

1653

Highly conjugated C=O

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