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| PT coal | AT coal | |||||
|---|---|---|---|---|---|---|
| number | peak position (cm–1) | area ratio (%) | functional group | peak position (cm–1) | area ratio (%) | functional group |
| 1 | 2918 | 39.93 | –CH2(as) | 2817 | 3.35 | –CH2(s) |
| 2 | 2949 | 14.32 | –CH3(as) | 2839 | 6.27 | –CH2(s) |
| 3 | 2853 | 24.78 | –CH2(s) | 2861 | 12.63 | –CH3(s) |
| 4 | 2831 | 4.20 | –CH2(s) | 2891 | 11.39 | –CH |
| 5 | 2889 | 16.77 | –CH(as) | 2914 | 25.75 | –CH(v) |
| 6 | 2932 | 20.24 | –CH2(as) | |||
| 7 | 2955 | 19.60 | –CH3(as) | |||
| 8 | 3000 | 0.75 | ||||
