Term:
Hard coal
Definition:
A black, natural fossil organic sediment with a gross calorific value of more than 23 860 kJ/kg (5 700 kcal/kg) in the ash-free condition and with the moisture content obtaining at a temperature of 30 degrees C and relative air humidity of 96 per cent, and with a mean random reflectance of vitrinite of at least 0.6.
Domain:
Energy
Source:
Glossary for Transport Statistics, prepared by the Intersecretariat Working Group on Transport Statistics – Eurostat, European Conference of Ministers of Transport (ECMT), United Nations Economic Commission for Europe (UNECE)
