Carbon-rich hard coal
This article examines the geological nature, distribution, extraction, economic importance and industrial uses of high-carbon hard coal — a group of coals valued for their high fixed carbon content and…
How Indonesia Became a Leading Coal Exporter
Coal has long powered industries, heated homes, and driven national economies. As one of the most abundant fossil fuels on Earth, its influence stretches from mining towns to global trading…
High-rank coal
High-rank coal occupies a distinctive place among fossil fuels. Often associated with superior energy density, lower volatile content and a higher fixed carbon fraction, this class of coal plays specific…
Anthracite briquettes
Anthracite briquettes are a concentrated, manufactured fuel derived from the highest-rank coal, prized for their high carbon content, low impurities and efficient combustion. This article explores the geology and distribution…
Carbonized coal
This article examines the nature, occurrence, processing and economic importance of carbonized coal — the coal that has undergone carbonization to yield high-carbon materials such as coke and other carbon…
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…
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…
Ultra-low-ash coal
Ultra-low-ash coal occupies a niche but increasingly important position within the global coal complex. Defined by its exceptionally low residue after combustion or processing, this coal type serves as a…
House coal
House coal — commonly sold as lumps of coal intended for domestic heating and small-scale use — remains an important yet controversial energy commodity in many parts of the world.…
The Role of Coal in Global Energy Security
Coal continues to play a pivotal role in shaping the contours of global energy systems. This article explores the multifaceted aspects of coal and **coal stock**, examining their contributions to…
