Carbon-rich hard coal
This article examines the geological nature, distribution, extraction, economic importance and industrial uses of high-carbon hard coal — a group of coals valued for their high fixed carbon content and…
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…
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…
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…
Sized coal
This article examines sized coal — coal that has been crushed, screened and graded into defined particle ranges for specific industrial uses. Sized coal plays a crucial role in power…
Crushed coal
Crushed coal is a widely used form of fossil fuel obtained by mechanically reducing the size of mined coal to meet the requirements of various industrial processes. This article examines…
Heating coal
Heating coal plays a continuing and complex role in the modern energy system. This article explores the geological occurrence, mining and processing, global production and trade, economic importance, industrial uses,…
Gas coal
This article explores the nature, distribution, economic importance and industrial uses of gas coal — a form of coal with distinctive physical and chemical properties that make it valuable for…
E-grade coal
This article explores E-grade coal — a commercial classification commonly used to describe lower-rank thermal coals with specific physical and chemical characteristics. It covers where such coals are found and…
Thermal PCI coal
Thermal PCI coal occupies a specific and growing niche at the intersection of the energy and steel industries. Often referred to simply as PCI coal (Pulverized Coal Injection coal), this…
