Bituminous coal
Esquema
Jerarquía
<materials by composition> > organic material > bituminous material > natural bituminous material > pyrobitumen > coal
Descripción
A relatively soft coal containing the tarlike substance asphaltic bitumen. Its carbon content is 60-80%, the rest composed of water, air, hydrogen, and sulfur. It is of higher quality than lignite coal but of poorer quality than anthracite. It was usually formed as a result of high pressure on lignite. It dark brown to black in color, commonly banded or layered. The major problem with burning of bituminous coal is air pollution.
URI original del concepto
Otros términos
- vette kolen [nl]
- carbón bituminoso [es]
- Steinkohle [de]
- coal, bituminous [en]
- soft coal [en]
- steam coal [en]
- bitumineuze kolen [nl]
- vette steenkolen [nl]