![]() ![]() According to the 2020 report of the International Renewable Energy Agency (IRENA) 1, “increasing the size of electrolyzers to 20 MW (compared with 1MW currently) could cut costs by more than one third”. The French State’s hydrogen strategy plans to promote this industrialisation by supporting the production of electrolyzers by small and medium-sized companies and major groups throughout the country.Įlectrolyzers play a key role in the development of hydrogen, because their design and build have a direct impact on costs. This is the reason why the French Environment and Energy Management Agency (ADEME) recommends “supporting the development of renewable sources of electricity (hydraulic, wind power or solar) by deploying electrolyzers to produce hydrogen, especially in the industrial and heavy transport sectors”. How can this cost be reduced? Through industrialisation and the large-scale deployment of electrolysis. The main obstacle to the development of renewable hydrogen is its production cost. What are the challenges of producing green hydrogen? electrolysis with electricity from the grid, if it is decarbonised enough.vaporeforming natural gas (which consists of “breaking” the methane molecule at 700☌ using catalysts) with CO2 capture and storage.On the other hand, low-carbon hydrogen is produced either by: When exclusively renewably-sourced electricity is used (hydraulic, wind power, or solar) for electrolysis, then the hydrogen is green, also said “renewable”. The difference lies in their carbon weight, or the quantity of greenhouse gases emitted when they are produced, which in turn depends on the energy used. What is the difference between green hydrogen and low-carbon hydrogen? Since this solution is still emerging, electrolysis currently remains the most common technique. This process extracts a complex gas containing hydrogen. Pyro-gasification consists of heating organic matter (wood biomass, end-of-life wood, crop residue, etc.), plus various forms of carbon-containing waste (solid recovered fuel, old tyres, non-recyclable plastic, dried sludge from wastewater treatment plants, etc.) to temperatures between 900☌ and 1,200☌ in the presence of a small quantity of oxygen. Is the electrolysis of water the only way to produce green hydrogen? The electricity must itself be carbon-free in order to consider this hydrogen as green or renewable.Ī hydrogen-fuelled car consumes 1 kg per 100 km. Electrolysis is THE technique used to produce hydrogen that consists of “breaking” the water molecules using an electric current in an electrolyzer in order to extract the dihydrogen H2. The H2 is separated from the O in a process called the electrolysis of water. Indeed! Water molecules (H2O) contain hydrogen (H). ![]() This renewable energy can then be used to produce renewable hydrogen. Finally, solar electricity finishes in third place, thanks to farms of photovoltaic panels that convert light into electricity. In second place is wind power ( onshore or offshore), which is produced by transforming the kinetic power of the wind into mechanical energy, and then electricity, using wind turbines. ![]() This technique transforms the power of water into electric current in hydro power plants installed on natural water courses or dams. Hydroelectricity is the primary source of renewable electricity in France and worldwide. There are three main sources of carbon-free electricity: water, the wind and the sun. Green electricity is the first step of the production of green hydrogen!
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