Power-grade lignite
This article examines brown coal (lignite), commonly referred to as power-grade lignite, describing its geological nature, global distribution, mining and processing methods, economic and industrial roles, environmental impacts and the…
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…
Lean coal
This article explores the technical, economic and geopolitical dimensions of what is commonly referred to as “lean coal” — lower-energy, lower-volatile types of coal often used for power generation rather…
Coking coal
Coking coal, also known as metallurgical coal, is a specialized type of coal used primarily for producing coke, the essential carbonaceous material in traditional iron and steelmaking. Unlike thermal coal…
Semi-anthracite
Semi-anthracite is a distinct rank of coal that occupies a middle ground between high-grade anthracite and the more common bituminous coals. It combines many of the advantageous physical and chemical…
