Knowra Hydrogen fuel Hydrogen fuel Hydrogen fuel is hydrogen used to deliver energy through combustion or electrochemical reactions. It stores energy made elsewhere rather than serving as a primary energy source.
Hydrogen fuel cell : An electrochemical device that converts hydrogen and oxygen into electricity, water, and heat. It turns hydrogen’s chemical energy directly into electricity without combustion.
Hydrogen vehicle : A vehicle that uses hydrogen, usually in a fuel cell, to provide propulsion. Fuel-cell vehicles turn stored hydrogen into onboard electricity for an electric motor.
Battery electric vehicle : A vehicle propelled by electric motors powered by rechargeable batteries. It stores electricity directly, unlike a hydrogen vehicle that converts stored hydrogen onboard.
Hydrogen economy : An energy system in which hydrogen is produced, stored, transported, and used at large scale. Hydrogen fuel becomes consequential when its production and distribution form an integrated system.
Steam methane reforming : An industrial process that reacts methane with steam to produce hydrogen and carbon monoxide. It is a dominant hydrogen-production route and usually releases carbon dioxide unless emissions are captured.
Hydrogen combustion : The reaction of hydrogen with oxygen that releases heat and forms water. Combustion uses hydrogen’s energy as heat, though hot air can also produce nitrogen oxides.
Ammonia production : The industrial manufacture of ammonia, commonly by reacting nitrogen with hydrogen. Hydrogen is a major feedstock for ammonia, linking fuel supply to fertilizer and chemical production.
Natural gas : A fossil fuel mixture composed mainly of methane. Natural gas is often used to make hydrogen, but it is itself a combustible fuel.
Greenhouse gas emissions : Gases released into the atmosphere that trap heat and contribute to climate change. Hydrogen use can be low-emission at the point of use, while its production may emit greenhouse gases.
Green hydrogen : Hydrogen produced by water electrolysis using renewable electricity. Its production can have low operational emissions when the electricity supply is genuinely renewable.
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