Green Hydrogen: Can It Power A Sustainable Future?
Green hydrogen refers to hydrogen produced exclusively from renewable energy sources, without direct carbon emissions during production. It is obtained by splitting water into hydrogen and oxygen using electricity generated from renewables such as solar, wind or hydro power.
Because no fossil fuels are involved and with no direct CO₂ emissions at the production site when powered by renewable electricity, green hydrogen is widely recognized as a key lever in the transition toward net-zero energy systems.
As an energy carrier rather than a primary energy source, green hydrogen enables renewable electricity to be converted, stored, transported and used when and where it is needed. This flexibility gives it a unique role in supporting energy systems that increasingly rely on intermittent renewable power.
Hydrogen produced from renewable sources has the potential to become a critical enabler of sustainable energy systems, supporting both industrial decarbonization and the evolution of low-emission mobility.
How Is Green Hydrogen Produced?
Green hydrogen is produced through a process called water electrolysis.
Electrolysis uses electricity to split water molecules (H₂O) into hydrogen (H₂) and oxygen (O₂). When the electricity powering this process comes entirely from renewable sources, the resulting hydrogen is considered green.
At the heart of this process is the electrolyzer. An electrolyzer consists of:
- An anode and a cathode
- A membrane separating both sides
- A power supply providing electrical current
When water enters the system and electricity is applied, hydrogen ions pass through the membrane and recombine to form hydrogen molecules. Oxygen is released as a by-product. The result is hydrogen produced without direct greenhouse gas emissions.
Electrolysis also allows renewable energy that would otherwise be lost during peak production periods to be converted into a storable molecule. This makes green hydrogen a powerful solution for long-term energy storage and system balancing.
Green Hydrogen: Is It Good or Bad for The Environment?
Green hydrogen is neither a miracle solution nor an impractical concept. Its value lies in where and how it is used.
Green Hydrogen Benefits: How Can It Support Sustainability and Decarbonization Efforts?
Green hydrogen plays a decisive role in addressing emissions from sectors that are difficult to electrify directly.
Across industry, green hydrogen can be used:
- As a feedstock in chemical processes
- As a clean energy vector for high-temperature industrial operations
To reduce emissions in energy-intensive activities such as refining, metallurgy, glassmaking, electronics and chemical manufacturing
In mobility, green hydrogen supports the use of fuel cells, particularly for heavy-duty and long-range applications.
Green hydrogen also strengthens the link between renewable power generation and end-use applications. By converting electricity into a transportable molecule, it helps stabilize energy systems and improves energy security.
Green Hydrogen Problems
Green hydrogen is not intended to replace all energy solutions.
Producing hydrogen through electrolysis requires significant amounts of renewable electricity, which can make it energy-intensive and, in some contexts, costly. For applications where direct electrification is technically feasible and efficient, electricity remains the preferred option.
This is why green hydrogen must be deployed strategically, focusing on sectors where alternatives are limited or unavailable. Its strength lies in complementing other low-carbon solutions rather than competing with them.
Energy transition will not rely on a single technology. Green hydrogen is one essential component within a broader, diversified energy mix.
Air Liquide’s Advancement and Sustainability Efforts
Air Liquide is convinced that green hydrogen can be decisive in the energy transition.
Air Liquide has a strong commitment to climate change and energy transition, our solutions are developed to achieve the highest performance in your applications while reducing your environmental impact.
Contact us today at Air Liquide Egypt to explore more about our gas solutions.