Non-swelling coal
This article examines the properties, distribution, economic importance and industrial uses of non-swelling coal — a category of coal defined by its limited tendency to cake or expand when heated.…
Low-swelling coal
This article explores the characteristics, occurrence, extraction, economic role and industrial uses of low-swelling coal. Low-swelling coals form an important segment of the global coal resource base. Although they are…
Composite coal
This article examines the subject commonly referred to as composite coal — a term that can denote both geological composite samples and engineered blends of different coal types used to…
Synthetic coal
This article examines the phenomenon commonly referred to as synthetic coal alongside conventional coal. It covers geological occurrence, extraction methods, economic and statistical context, industrial uses, environmental consequences, and emerging…
Coal-to-liquid feedstock
This article examines coal as a feedstock for coal-to-liquid (CTL) processes: its geology, global occurrence, mining and supply, economic importance, statistics, industrial uses, environmental challenges and technological trends. Coal remains…
Low-mercury coal
This article examines the topic of low-mercury coal from geological occurrence to mining regions, market dynamics, industrial uses and environmental implications. Low-mercury coal has become an important commodity as regulators,…
High-volatile A coal
This article examines the properties, distribution, extraction, economic role and industrial uses of high-volatile A bituminous coal. It explains what distinguishes this rank from other coals, where significant deposits are…
De-ashed coal
De-ashed coal is a processed form of coal from which mineral matter (ash) and many inorganic impurities have been substantially reduced or removed. Through a variety of physical and chemical…









