Underground-mine coal
Underground-mine coal — commonly referred to as coal extracted from deep seams below the earth’s surface — remains a cornerstone of global industry, energy systems and regional economies. This article…
Vitrain coal
Vitrain coal occupies a special place in coal petrology and the coal industry. Recognized by its bright, glassy appearance and distinctive banding within coal seams, vitrain is a lithotype that…
Coal with high liptinite content
This article examines coals that are unusually rich in liptinite macerals — a group of organic constituents in coal that derive from spores, cuticles, resins and algal materials. Such coals…
Coal tar-rich coal
This article examines coal varieties that yield high volumes of coal tar — a historically and industrially important byproduct of coal processing. It covers geological characteristics, major producing regions, extraction…
Low-caking coal
Low-caking coal is a specific category of coal defined by its limited tendency to soften, swell and fuse when heated in the absence of air. Unlike coking or strongly caking…
Gasification-grade bituminous coal
Gasification-grade bituminous coal is a specific class of coal valued for its suitability in conversion processes that produce synthesis gas (syngas) — a mixture primarily of carbon monoxide and hydrogen…
Ultra-low-phosphorus coal
Ultra-low-phosphorus coal represents a niche but strategically important subset of coals whose exceptionally low concentrations of phosphorus make them valuable to high-specification industrial applications. This article examines what ultra-low-phosphorus coal…
High-volatile B coal
High-volatile B coal occupies an important place in the global spectrum of fossil fuels. As a specific sub-rank within the broader category of bituminous coals, it combines distinct physical and…
How Coal Gasification Could Power the Next Generation of Energy
Coal has been a cornerstone of global energy production for centuries, providing heat, electricity, and a range of industrial applications. As the world transitions toward cleaner energy sources, traditional coal…
High-BTU coal
High-BTU coal is a category of fossil fuel prized for its high energy content per unit mass and strong industrial applications. In many energy and metallurgical markets, this coal commands…
