Boiler coal
This article examines the market, geology, production and uses of boiler coal — the category of thermal coal most commonly burned in boilers for space heating, district heat and industrial…
Utility steam coal
The following article explores utility steam coal — the thermal coal used predominantly for producing heat and electricity — examining its geological occurrence, global mining hotspots, economic and statistical context,…
Standard steam coal
Standard steam coal is a widely used form of coal designed primarily for heat and power applications. It is a cornerstone fuel for many electricity systems and industrial boilers, characterized…
Non-premium steam coal
Non-premium steam coal occupies a large and pragmatic niche within the global energy mix. Unlike high-grade or so-called premium coals used in metallurgical processes or selected high-efficiency boilers, non-premium steam…
Blending-grade low-ash coal
Blending-grade low-ash coal is a specialized category of coal prized for its consistently high quality and suitability for mixing with poorer coals to meet strict industrial specifications. This article explores…
High-ash thermal coal
High-ash thermal coal is a widely used but often overlooked category of fossil fuel that plays a significant role in electricity generation and industry in many parts of the world.…
Low-ash metallurgical coal
This article examines low-ash metallurgical coal — a specialized class of coal that is central to traditional steelmaking and remains an economically strategic commodity worldwide. The text explains the coal’s…
High-density coal
This article explores the characteristics, occurrence, extraction, economic importance and industrial uses of high-density coal — a group of high-rank coals and coal products notable for their elevated fixed carbon,…
Low-density coal
Low-density coal represents a group of lower-rank coals—most commonly known as lignite and sub-bituminous coals—that are characterized by higher moisture content, greater porosity, lower carbon concentration and reduced energy density…
Porous coal
Porous coal is a variant of coal characterized by a pronounced internal network of voids and channels that significantly influence its physical, chemical and economic behavior. Unlike dense, massive coal,…
