Super-clean coal
Super-clean coal refers to coal that has been processed and treated to have very low levels of impurities and emissions-related constituents, or to naturally occurring high-grade coal that inherently contains…
High-rank coal
High-rank coal occupies a distinctive place among fossil fuels. Often associated with superior energy density, lower volatile content and a higher fixed carbon fraction, this class of coal plays specific…
Low-rank coal
Low-rank coals — commonly referred to as lignite and sub-bituminous coals — occupy an important but often misunderstood position in the global energy mix. Characterized by high moisture content, relatively…
Bituminous briquettes
Bituminous briquettes are a form of processed coal that combine the properties of natural bituminous coal with mechanical compaction and, often, added binders to create a solid, uniform fuel product.…
Anthracite briquettes
Anthracite briquettes are a concentrated, manufactured fuel derived from the highest-rank coal, prized for their high carbon content, low impurities and efficient combustion. This article explores the geology and distribution…
Ovoid coal
Ovoid coal is a term that can refer both to a particular morphological form of coal lumps and to the broader category of coal as a vital geological and industrial…
Smokeless coal
Smokeless coal is a category of coal and coal-derived fuels valued for their low visible smoke output when burned, making them desirable for domestic heating and certain industrial processes where…
Activated coal (activated carbon)
Activated coal, commonly known in English as activated carbon, is a highly porous form of carbon produced from carbonaceous raw materials — including coal — and widely used for adsorption,…
){kind=link}
Coal slurry
Coal slurry is an often-overlooked but highly consequential component of the coal industry: a mixture of fine coal particles, water and mineral matter produced during coal washing, handling and combustion…
Coal fines
This article examines the often-overlooked fraction of coal known as coal fines — the small particles and powdered material generated during mining, handling, crushing and processing of coal. Coal fines…
