Crushed coal
Crushed coal is a widely used form of fossil fuel obtained by mechanically reducing the size of mined coal to meet the requirements of various industrial processes. This article examines…
Heating coal
Heating coal plays a continuing and complex role in the modern energy system. This article explores the geological occurrence, mining and processing, global production and trade, economic importance, industrial uses,…
Gas coal
This article explores the nature, distribution, economic importance and industrial uses of gas coal — a form of coal with distinctive physical and chemical properties that make it valuable for…
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…
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…
Lean coal
This article explores the technical, economic and geopolitical dimensions of what is commonly referred to as “lean coal” — lower-energy, lower-volatile types of coal often used for power generation rather…
Peat coal
Peat, often called peat coal in some regional contexts, occupies a unique place between organic soil and true coal both geologically and economically. Formed over thousands of years from partially…
Brown coal
This article explores brown coal (commonly called lignite) in detail: its geological origins, where it is found and mined, its economic and industrial roles, statistical snapshots of production and consumption,…
Sub-bituminous coal
Sub-bituminous coal is an intermediate rank of coal that bridges the gap between lignite and bituminous coal. It plays a crucial role in modern energy systems, particularly in power generation,…
Low-volatile bituminous coal
Low-volatile bituminous coal is a high-rank coal grade prized for its elevated carbon content, strong coking properties and relatively low volatile matter. This article examines its geological characteristics, global distribution,…
