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…
E-grade coal
This article explores E-grade coal — a commercial classification commonly used to describe lower-rank thermal coals with specific physical and chemical characteristics. It covers where such coals are found and…
D-grade coal
D-grade coal occupies a specific niche in the wider spectrum of coal types: it is typically a lower-ranked, commercially traded category of coal used mainly for thermal applications, industrial heating…
Ultra-supercritical coal grade
The term ultra-supercritical is most commonly associated with advanced steam cycle technology used in coal-fired power plants, not a standalone type of coal. However, certain coal qualities are particularly suitable…
Supercritical coal grade
This article examines the concept commonly referred to as supercritical coal grade and, more broadly, the relationship between coal quality and the technologies known as supercritical and ultra-supercritical power plants.…
Thermal PCI coal
Thermal PCI coal occupies a specific and growing niche at the intersection of the energy and steel industries. Often referred to simply as PCI coal (Pulverized Coal Injection coal), this…
Blended coal
Blended coal refers to coal products created by combining different grades or types of coal to achieve specific technical and commercial specifications. Blending is a widespread practice in power generation,…
Enriched coal
Enriched coal — a term often used to describe coal that has undergone physical and/or chemical processing to improve its quality — plays a complex role in the modern energy…
Cleaned coal
This article examines cleaned coal — both the material produced by beneficiation (washing and preparation) and the suite of technologies often marketed as “clean coal” aimed at reducing the environmental…
Washed coal
Washed coal is coal that has been processed to remove impurities such as rock, ash, sulfur, and other unwanted materials. Through mechanical and physical beneficiation methods, washed coal delivers higher…
