Grey Hydrogen is derived from natural gas and produced from fossil fuels such as natural gas or methane, that is the most common form of hydrogen production. The Gray Hydrogen is relatively inexpensive and commonly used in the chemical industry to make fertiliser (e.g., synthesise ammonia and its derivatives for agriculture) and for refining oil (e.g., desulphurisation of fractions intended for fuel applications) that accounts from roughly 95% of the hydrogen produced in the world today. (Refer to the Green Hydrogen; Blue Hydrogen)
Related Definitions in the Project: The Renewable Energy; Hydrogen Fuel Cell; Element and Substance
