Geologists and industry advocates are defending the use of coal in specialized industrial applications, arguing that its unique chemical properties remain essential for processes that currently lack viable alternatives. While environmental groups increasingly label the promotion of these uses as "greenwashing," professionals in the field maintain that coal’s role in steel production and chemical manufacturing is distinct from its use in power generation.
Why coal remains essential in industrial processes
Coal is not solely a fuel source; it serves as a critical raw material in the production of high-grade steel and various chemical compounds. According to the World Coal Association, coking coal—or metallurgical coal—is a primary ingredient used to produce coke, which acts as both a fuel and a reducing agent in blast furnaces.
Unlike thermal coal burned for electricity, metallurgical coal has specific carbon and impurity profiles that allow it to strip oxygen from iron ore. Industry experts note that while research into hydrogen-based steelmaking is ongoing, large-scale commercial alternatives that match the efficiency of coal-fed blast furnaces are not yet fully implemented globally.
The "Greenwashing" debate
The tension between industrial utility and environmental impact has intensified as companies face pressure to reach net-zero emissions. Environmental organizations, such as ClientEarth, argue that marketing coal as a "specialized" or "essential" material often obscures the broader climate impact of the coal supply chain.
Critics contend that emphasizing non-combustion uses can be used to justify continued investment in coal mining infrastructure that primarily serves the energy sector. Conversely, industry representatives argue that distinguishing between thermal and metallurgical applications is a matter of geological and chemical accuracy rather than a marketing tactic. They maintain that the physical properties of coal—specifically its high carbon content and structural integrity—are currently irreplaceable in heavy industry.
Comparison of coal applications
The following table outlines the functional differences between the two primary categories of coal usage:
| Feature | Thermal Coal | Metallurgical (Coking) Coal |
|---|---|---|
| Primary Use | Electricity generation | Steel and iron production |
| Key Property | Energy density/Heat output | Coking properties/Carbon purity |
| Market Trend | Declining in many regions | High demand for industrial output |
| Substitution | Renewables, natural gas | Hydrogen, electric arc furnaces |
What happens next for industrial coal?
The future of coal in the industrial sector hinges on the development of "green steel" technologies. Major steel producers, including ArcelorMittal, are currently investing in carbon capture and storage (CCS) and hydrogen-based reduction methods to reduce reliance on coking coal.
As regulatory frameworks tighten, the industry is expected to face increased scrutiny regarding its supply chains. Investors are increasingly looking for transparent reporting that separates emissions related to power generation from those associated with essential industrial inputs. The path forward involves a transition toward technologies that can replicate the chemical reduction properties of coal without the associated carbon footprint.