Aged lignite
This article examines aged lignite — commonly known as lignite or brown coal — from geological, technical, economic and environmental perspectives. It explains what distinguishes aged lignite from fresh coal,…
Soft brown coal
Soft brown coal, commonly known as lignite, is a low-rank type of coal that plays a distinct role in the global energy mix and regional economies. Characterized by high moisture…
Coal with high vitrinite content
Coal with high vitrinite content represents a distinct and economically important category of coal whose physical and chemical characteristics influence its use across power generation, metallurgical processes, chemical conversion and…
High-swelling coal
High-swelling coal — often referred to in industry as coking or caking coal with a high swelling index — plays a central role in traditional steel production and in several…
Industrial-grade lignite
Industrial-grade lignite, often termed brown coal, is a distinctive type of coal that occupies an important but controversial position in the global energy and industrial landscape. Characterized by relatively low…
High-volatile C coal
High-volatile C coal is a specific rank within the bituminous coal classification that plays a significant role in global energy systems, industrial processes and regional economies. This article provides a…
High-volatile A coal
This article examines the properties, distribution, extraction, economic role and industrial uses of high-volatile A bituminous coal. It explains what distinguishes this rank from other coals, where significant deposits are…
Syngas coal feedstock
This article examines the use of coal as a feedstock for producing syngas — a mixture of primarily carbon monoxide and hydrogen — addressing its geological occurrence, extraction regions, industrial…
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…
Hard steam coal
Hard steam coal is a widely used category of solid fossil fuel, valued for its relatively high energy content and versatility across power generation and industrial processes. This article examines…
