Exploring Hydrogen: Forms of Hydrogen
The demand for clean and renewable energy sources is rising as the world accelerates toward a sustainable future. Among these sources, hydrogen (blue and green), solar, and wind energy have emerged as major players in transitioning to a zero-carbon future.
Green Hydrogen
This technology is based on the generation of hydrogen — a universal, light and highly reactive fuel — through a chemical process known as electrolysis. This method uses electrical current to separate hydrogen from the oxygen in water. If this electricity is obtained from renewable sources we will, therefore, produce energy without emitting carbon dioxide into the atmosphere.
Grey Hydrogen
Grey hydrogen is the most common form and is generated from natural gas, or methane, through a process called “steam reforming”.
Black and Brown Hydrogen
Black or brown hydrogen refers to hydrogen produced by coal gasification. The black and brown colors sometimes indicate the coal type: bituminous (black) and lignite (brown).
Black or brown hydrogen is the most environmentally damaging as both the CO2 and carbon monoxide generated during the process are not recaptured.
Blue Hydrogen
Hydrogen is labelled blue whenever the carbon generated from steam reforming is captured and stored underground through industrial carbon capture and storage (CSS).
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