Ultra-cleaned thermal coal
The term ultra-cleaned thermal coal refers to thermally graded coal that has undergone intensive beneficiation and cleaning processes to remove ash, sulfur, moisture and other impurities, producing a fuel with…
Chemical-grade coal
This article examines the specialised category commonly called chemical-grade coal — varieties of coal selected or processed for use as a raw material in chemical, metallurgical and high-value industrial applications.…
Power-station coal
This article examines the coal used in large-scale electricity generation — commonly called power-station or thermal coal — its geological occurrence, mining and processing, economic and trade dynamics, role in…
Carbon coal
The following article examines the geological nature, global distribution, economic importance, and environmental implications of coal — a sedimentary rock that has powered industry and societies for centuries. It covers…
F-grade coal
This article explores the characteristics, occurrence, production, economic role and industrial significance of what is commonly referred to as F-grade coal — a practical label used in some markets and…
Ultra-low-ash coal
Ultra-low-ash coal occupies a niche but increasingly important position within the global coal complex. Defined by its exceptionally low residue after combustion or processing, this coal type serves as a…
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…
Sub-bituminous C
Sub-bituminous C is a specific rank of coal that plays a quiet but important role in global energy systems. Positioned between lignite and higher-rank bituminous coals, sub-bituminous C combines relatively…
Sub-bituminous B
Sub-bituminous B coal is a low- to medium-rank thermal coal that plays an important role in contemporary energy systems, particularly for power generation. It sits between lignite and bituminous coal…
Soft coking coal
Soft coking coal occupies a specific and important niche within the family of bituminous coals. It combines properties that make it partially suitable for metallurgical processes, particularly when blended with…
