Research Article
Characterization and Identification of Coal and Carbonaceous Shale Using Visible and Near-Infrared Reflectance Spectroscopy
Table 2
X-ray fluorescence (XRF) and proximate analysis of samples in Figure
1.
| Sample | XRF analysis (wt. %) | Proximate analysis (wt. %) | SiO2 | Al2O3 | Fe2O3 | Matrix | Volatile | Ash |
| Bituminite (a) | 8.63 | 5.01 | 0.87 | 82.60 | 13.74 | 16.05 | Bituminite (b) | 10.61 | 6.17 | 0.81 | 79.12 | 16.14 | 18.22 | Bituminite (c) | 10.68 | 8.40 | 3.39 | 73.94 | 21.57 | 23.95 | Carbonaceous shale (d) | 26.46 | 19.98 | 3.14 | 47.80 | 7.86 | 51.80 | Carbonaceous shale (e) | 32.13 | 21.20 | 1.04 | 41.25 | 4.31 | 57.55 | Carbonaceous shale (f) | 45.65 | 30.14 | 0.92 | 20.24 | 1.51 | 78.94 |
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