Table 2.
Petrographic characteristics of the studied coal.
| Supplier, country | Petrographic composition (without mineral impurities), % |
Index of reflection vitrinite, % |
Stages of vitrinite metamorphism, % | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Vt | Sv | I | L | ∑FC | R 0 | 0.50–0.79 | 0.80- 0.89 |
0.90–1.19 | 1.20–1.49 | 1.50–1.69 | 1.70–2.59 | |
| EF “Pavlogradska”, Ukraine | 66 | 0 | 31 | 3 | 31 | 0.60 | 99 | 1 | 0 | 0 | 0 | 0 |
| EF “Dobropilska”, Ukraine | 72 | 0 | 25 | 3 | 25 | 0.77 | 58 | 34 | 8 | 0 | 0 | 0 |
| Wellmore, USA | 77 | 0 | 20 | 3 | 20 | 1.02 | 5 | 11 | 81 | 3 | 0 | 0 |
| Arch Coal Premium, USA | 72 | 0 | 24 | 4 | 24 | 0.98 | 3 | 10 | 84 | 3 | 0 | 0 |
| EF “Svyato-Varvarynska”, Ukraine | 84 | 1 | 14 | 1 | 15 | 1.23 | 0 | 0 | 41 | 59 | 0 | 0 |
| Illawarra, Australia | 91 | 0 | 9 | 0 | 9 | 1.27 | 0 | 0 | 31 | 65 | 3 | 0 |