Blue Hydrogen is the hydrogen (H2) produced from natural gas with a process of steam reforming, where natural gas is mixed with very hot steam and a catalyst that splits into hydrogen and carbon dioxide (CO2), and the CO2 is captured and stored (e.g., Carbon Capture, Utilisation and Storage (CCUS)). If the CO2 emissions are captured and stored, the process is considered carbon-neutral, and the resulting hydrogen is called the Blue Hydrogen. The Hydrogen is produced over 90% from using fossil fuels (Coal and Natural Gas), and the Blue Hydrogen process requires a lot of energy, 25% more natural gas to make blue hydrogen than used directly for heat. (Refer to the Green Hydrogen)
Related Definitions in the Project: The Renewable Energy; Element and Substance
