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…
Non-caking coal
Non-caking coal is a broad category of coals that do not soften, plasticize or fuse into a coherent, porous mass (coke) when heated in the absence of air. It is…
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…
H-grade coal
This article examines H-grade coal — a term often used in industry to denote higher-quality coal with significant heat output and specific properties that make it valuable for energy and…
