Hydrogen is a colourless, odourless, tasteless and non-toxic gas that is the simplest of the chemical elements, consisting of a single proton and a single electron. There is currently a huge amount of media attention about hydrogen, which reference it being many different colours such as blue, grey, green, pink etc. As molecular hydrogen doesn’t typically exist in nature so needs to be generated by a process; these hydrogen colours mentioned in the media do not have different characteristics or chemistries but describe the process by which the hydrogen is formed. The hydrogen formed is still completely colourless and it actually burns with a very pale blue flame, which is almost impossible to see with the naked eye in daylight…so what do the different hydrogen colours really mean? BROWN – Brown hydrogen is produced from coal through a process called gasification, which involves heating the coal in the absence of air and gives off substantial quantities of carbon dioxide as a by-prod...

The green hydrogen world often regards Jules Verne as a prophet. In his book, the Mysterious Island, written 146 years ago, he wrote, "I believe that water will one day be employed as fuel, that hydrogen and oxygen, which constitute it… will furnish an inexhaustible source of heat and light." BUT electrolysis was first used to split water by two English scientists William Nicholson and Anthony Carlisle in 1800; so perhaps Monsieur Verne is less of a prophet and more of a technocrat with a keen eye for a good idea. By Étienne Carjat - This file comes from Gallica Digital Library and is available under the digital ID btv1b84497879/f1, Public Domain, https://commons.wikimedia.org/w/index.php?curid=83065220  Since the discovery of electrolysis there have been compounding advancements over the last 200 years that have produced an electrolyser unit that is now commercially deployable, enabling the spatially disparate unleashing of the energy stored in the hydrogen contained in wate...