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Table 1 Properties of coal sample in the opencast coal mine

From: Bioconversion of coal to methane by microbial communities from soil and from an opencast mine in the Xilingol grassland of northeast China

Analysis Yield (%)
Proximate analyses (air dried) %
Moisture 7.5
Volatile matter 32.05
Fixed carbon 53.68
Ultimate analysis vol. (dry ash free) %
Carbon 73.98
Hydrogen 4.09
Nitrogen 0.93
Sulfur 0.32
Oxygen 20.70
Petrographic analysis vol. %
Vitrinite 24.6
Liptinite 3.5
Inertinite 71.6
Mineral matter 0.8
Reflectance (Ro, max) % 0.31
Classification Lignite