This Green Hydrogen Production is a 18 MW proton exchange membrane (PEM) electrolysis plant, powered by renewable energy to generate high-purity dry hydrogen gas.  

The system produces up to 4000 Nm3/h of green hydrogen by splitting demineralized water into hydrogen and oxygen using 16 electrolysis stacks  

With this interactive 3D model, users can explore the electrolysis process, power electronics, pressure swing adsorption and the economics of producing hydrogen from renewable energy. 

See live process simulation information in the virtual environment and try out one of the technologies announced as part of the solution to the energy transition problem. 

Main features: PEM electrolysis system: 

Main case In this method of electrolysis, electricity splits water into hydrogen and oxygen gases. A solid polymer electrolyte allows hydrogen ions to pass through selectively, keeping the gases isolated. 

Electrochemical reactions : 

• On the anode water decomposes, producing oxygen, hydrogen ions and electrons: 2H₂O → 4H⁺ + O₂ + 4e- 

• At the cathode hydrogen ions combine with electrons to form hydrogen gas:  

4H⁺ + 4e- → 2H₂ 

Electrolysis Battery Composition Made up of several cells, each with bipolar plates acting as anodes and cathodes. These plates also contain channels for water flow and gas separation. 

Operating mechanism: 

The water enters through flow channels, moves through a diffusion layer and reaches the anode catalyst. Here, it decomposes into oxygen gas and hydrogen ions. The hydrogen ions migrate through the membrane, reacting at the cathode to produce hydrogen gas. This process is maintained at pressures of 30 barg on the hydrogen side and 4 barg on the oxygen side. 

Cooling integration The circulating feed water is cooled by means of a heat exchanger before entering the electrolysis stack, where it acts as a reactant and cooling agent. 

Separation and Recirculation: 

• The mixture of oxygen and water separates, allowing the oxygen to be released while the water is recycled through the system. 

• Likewise, the mixture of hydrogen and water is cooled, separated and purified using a pressure swing adsorption (PSA) unit, which dries the hydrogen for greater purity. 

Product dehydration A temperature oscillation adsorption unit, with four zeolite-filled beds, further purifies the hydrogen by removing residual moisture and impurities, guaranteeing a high purity result. 

Electrical supply system High-voltage electricity is first reduced and rectified to provide a stable current to the electrolysis cells, allowing precise control of hydrogen production levels.