Green hydrogen production

Green hydrogen (H₂) is a versatile energy carrier that can be applied to decarbonize a wide range of sectors. It can be used directly or in the form of its derivatives like e-Methanol, e-Ammonia, or e-Fuels to replace fossil fuels like coal or gas.
Only around 40% of global carbon dioxide (CO₂) emissions originate from power generation which can be decarbonized via electrification. The other 60% of CO₂ emissions originate from industry, mobility, buildings and others. These can be decarbonized via sector coupling, using green hydrogen and its derivatives to make renewable energy available to those sectors.��This is why the production of sustainable hydrogen is so important for the energy transition.

Generating green hydrogen��ڴھ��Գٱ�� from water and renewable energy requires��high-end technology and innovative solutions — like our electrolyzer product family from ��˿��. Using Proton Exchange Membrane (PEM) electrolysis, our electrolyzer is ideally suited for harnessing volatile energy generated from wind and solar. Combining high efficiency and high power density, our PEM electrolyzers ensure gas products of superior quality. It is easy to operate and requires low maintenance. Using a modular design strategy that splits the electrolysis system into skids, we are able to optimize costs, reduce installation costs, and make the electrolysis system transportable.

Shows electrolyzer at Trailblazer project in Oberhausen

Carbon emission targets in the European Union and other industrialized countries will require massive scaling-up and acceleration of renewable hydrogen production and imports.

That’s why we have joined forces with Air Liquide��to create a joint venture dedicated to the series production of industrial-scale renewable hydrogen electrolyzers. In 2023, we started production of electrolysis stacks��at our multi-gigawatt electrolyzer facility in Berlin��and will ramp up the production. The factory will supply stacks to ��˿�� and Air Liquide for our broad range of customers and serve the rapidly growing market.��

We can offer comprehensive services for your electrolyzer plant and energy assets along the entire hydrogen value chain. Our service agreements range from basic maintenance to premium service with state-of-the-art data analysis and can be customized to your needs.
Our combined package of maintenance, support and digital services can ensure reliable and economical operation. You can reduce your risks with our performance guarantees or enjoy total peace of mind with our operations and maintenance service program.��Together, we will push your clean hydrogen production to the next level.

Overview of ��˿��'s services for the production of green hydrogen

PEM electrolyzer plant in Normand’Hy, France, to produce hydrogen for industry and mobility

Our 20 MW electrolyzer project in Oberhausen with two people in front of stacks

In PEM water electrolysis, water is split into its molecules, oxygen and hydrogen. This requires a PEM membrane as well as an anode and a cathode

Our Proton Exchange Membrane (PEM), simply explained, splits water into its molecules hydrogen and oxygen using an electric current. The PEM membrane serves as barrier between the two electrodes and allows the protons to pass through while preventing the mixing of the gases, facilitating the separation and collection of the hydrogen and oxygen gases.

PEM water electrolysis is an important technology for the production of hydrogen as a clean and sustainable source, as it provides a way to generate hydrogen gas using renewable electricity and water, without producing greenhouse gas emissions. ��

With our extensive knowledge of industrial, mobility, and energy sectors, we’re able to provide dependable solutions for our customers in every aspect of green hydrogen production.��

You will benefit from ��˿��’s decades of experience, global footprint, infrastructure, strong partnerships and manpower available, covering the full energy value chain from renewable power via transmission to hydrogen and Power-to-X production. Moreover, we can help you certify the source of green energy with CertaLink certification.��

Are you ready for the green hydrogen economy? We are and we look forward to being your partner��for sustainable hydrogen generation.

Our Haru Oni project represents our Power to X technology for a carbon-free world

Cover image of a white paper on the economic feasibility, key markets, and applications of e Ammonia in global Power to X strategies.

Our Kasso project in Denmark shows the advantages of e Methanol in the shipping industry

Integrated electrolyzer and heat pump system for efficient hydrogen and heat production from waste heat

Hybrid power solutions for decarbonizing independent energy supply and ensuring cost-effective, accessible power.

ESD focuses on cost-effective decarbonization for sustainable energy system transformation

Green hydrogen as a CO2-free energy carrier is essential for Power-to-X solutions and decarbonization efforts.

It is not inherently more dangerous than other fuel sources.�� Hydrogen is flammable and must be handled with care, just like other flammable fuels. To ignite, the hydrogen must be combined with an additional oxidizing agent (air, pure oxygen, chlorine, etc.) in a specific�� concentration and an ignition source (a spark). If, in a worst-case scenario, the hydrogen ignites, it burns upwards very quickly. It creates no dangerous heat radiation above the accident site, as petrol or kerosene do.

The facilities are designed to be permanently leak proof. Flange connections are designed especially for hydrogen and the number of detachable connections are minimized. Furthermore, in buildings a steady air exchange is ensured and the facilities are equipped with safety valves and pressure reliefs. Additionally explosion prevention zones are designated. In these zones, electrical and other equipment needs to be in accordance with 2014/34/EU (ATEX Directive).

Electrolysis processes can be categorized as follows: alkaline electrolysis with liquid alkaline electrolytes, acidic electrolysis with a solid polymer electrolyte (as PEM) and high temperature electrolysis with a solid oxide as electrolyte.

PEM electrolysis and alkaline electrolysis systems are available at an industrial scale. The solid oxide electrolysis technology is in an early development phase.

Hydrogen enables the long-term storage of large quantities of surplus renewable energy. It is allows new ways to use green electricity, i.e. by using hydrogen as substitute for natural gas by feeding it into existing pipelines, as fuel for fuel-cell vehicles or power plants, or as feedstock for the hydrogen processing industry. It opens the possibility to connect energy generation with the industry and mobility sectors, the so called “sector coupling”.

‘Green’ hydrogen is sourced by 100% renewable energy. That means that the needed energy to produce hydrogen by electrolysis has emitted zero emissions. Hydrogen produced from fossil fuels releasing emissions such as CO₂, may be referred to as ‘grey’ or ‘brown’ hydrogen. If the emitted carbon dioxide is captured, stored (carbon capture storage) and re-used, it is often called ‘blue’ hydrogen.

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