Green hydrogen

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Hydrogen produced through the electrolysis of water, providing 100% or near 100% renewable energy with close to zero greenhouse gas emissions (<=1 kg CO2e per kg H2 taken as an average over a 12-month period). (Green Hydrogen Standard).

Green hydrogen is seen by many as a mission critical solution in mitigating climate change and achieving carbon neutrality in this century. It is versatile and can help to replace fossil fuels and hence reduce (or even eliminate) carbon emissions across multiple economic sectors. Within transportation, it can be used as a fuel to power vehicles that carry passengers and cargo.

Within buildings, it can provide low-carbon heat and electricity. It can be used by utilities to store and distribute surplus energy generated from renewable sources to either stabilise electrical grids or add the energy supplies across sectors. It can also be used as a feedstock for other industrial and agricultural processes, helping lower their carbon intensity.

Furthermore, it can provide the chemical and/or thermal energy needed for industrial processes like steel, cement and chemical production. All that accounts for around 15-20% of all carbon emissions produced in the global economy. Electrical energy is unable to replace the chemical energy currently supplied by energy rich fossil fuels. As a result, these applications are unfit for decarbonisation via electrification.


What is green hydrogen and why do we need it? An expert explains.
Green hydrogen: A guide to policy making PDF