• July 20, 2026
The Architecture of Old Coal Power Stations Around the World

Coal remains one of the most enduring sources of energy in human history, fueling industries, powering homes, and driving technological progress for centuries. This article delves into the geological origins…

  • June 21, 2026
Pribbenow Mine – Colombia

Pribbenow Mine is a coal mining site referenced in connection with Colombia’s northern coal-producing regions. This article compiles available information about its location, geology, types of coal extracted, economic and…

  • June 12, 2026
Optimum Coal Mine – South Africa

The Optimum Coal Mine, located in South Africa’s rich Highveld coalfields, is one of the better-known coal operations in the Mpumalanga/Ogies region. This article summarizes its location, geological characteristics, the…

  • May 19, 2026
Coal middlings

This article examines the phenomenon commonly called coal middlings — the intermediate-sized, intermediate-quality fractions produced during coal mining and preparation. Coal middlings occupy a complex place between high-grade clean coal…

  • May 11, 2026
Coal-to-liquid feedstock

This article examines coal as a feedstock for coal-to-liquid (CTL) processes: its geology, global occurrence, mining and supply, economic importance, statistics, industrial uses, environmental challenges and technological trends. Coal remains…

  • May 9, 2026
Gasification-grade sub-bituminous coal

This article examines gasification-grade sub-bituminous coal: its geological characteristics, global distribution, mining and supply patterns, technical suitability for coal gasification and related processes, economic and market aspects, environmental considerations, and…

  • April 29, 2026
Mining-grade coal

This article examines mining-grade coal: its geology, types, where it occurs and is extracted, economic and statistical dimensions, industrial importance, and ongoing technological and environmental developments. The discussion covers both…

  • April 4, 2026
Prime PCI blend

This article examines the characteristics, occurrence, mining, economic significance and industrial role of the Prime PCI blend — a category of coals specifically tailored for pulverized coal injection (PCI) into…

  • March 23, 2026
Baruun Naran Mine – Mongolia

The Baruun Naran Mine, one of several coal-related sites referred to in Mongolian exploration and mining literature, sits within the broader context of Mongolia’s rapidly evolving coal industry. This article…

  • January 26, 2026
Low-BTU coal

This article examines the characteristics, occurrences, extraction, economic roles and industrial importance of low-calorific-value coal—commonly referred to as low-BTU coal. It presents geological and geographical contexts, outlines the technological and…