Our way of life needs an increasing amount of watts to function. The war in Ukraine has caused a global energy crisis due to the lack of fossil fuels. This has led to an unprecedented rise in the price of natural gas and coal, causing Europe to import much more liquefied natural gas than usual, with the attendant problem of worsening climate change. However, decarbonising the planet suggests a different world in 2050: one that is more accessible, efficient and sustainable, and driven by clean energies such as green hydrogen.
What is green hydrogen an how is it obtained?
This technology is based on the generation of hydrogen — a universal, light and highly reactive fuel — through a chemical process known as electrolysis. This method uses an electrical current to separate the hydrogen from the oxygen in water. If this electricity is obtained from renewable sources we will, therefore, produce energy without emitting carbon dioxide into the atmosphere.
As the IEA points out, this method of obtaining green hydrogen would save the 830 million tonnes of CO2 that are emitted annually when this gas is produced using fossil fuels. Likewise, replacing all grey hydrogen in the world would require 3,000 TWh/year from new renewables — equivalent to current demand of Europe. However, there are some questions about the viability of green hydrogen because of its high production cost; reasonable doubts that will disappear as the decarbonisation of the earth progresses and, consequently, the generation of renewable energy becomes cheaper.
How is greenhydrogen obtain?
Producing green hydrogen by electrolysis from renewable sources involves breaking down water molecules (H2O) into oxygen (O2) and hydrogen (H2).
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HydrogenOxygen
Cathodic reaction
4H+ + 4e- → 2H2
Anodic reaction
2H2O → O2 + 4H+ + 4e-Membrane
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Osama Bahnas
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https://www.iberdrola.com/sustainability/green-hydrogen📷
https://energyevolutionconference.com/green-hydrogen-and-renewable-energy/📷
https://www.dsneg.com/info/green-hydrogen-an-alternative-that-reduces-em-51930522.html📷
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