Technical background

Electrolysis is the name given to a chemical process in which electric current forces a redox reaction. It is used, for example, to extract metals, or to produce substances that would be more expensive or virtually impossible to extract by purely chemical processes. Examples of important electrolyses are the extraction of hydrogen, aluminum, chlorine, caustic soda.

Electrolysis plant

We offer turnkey electrolysis plants in the capacity classes from 1 up to 1000 Nm³/h. Our plants consist of the electrolysers and gas post-treatment to achieve purities of up to 99.999%. This purity is required, among other things, for the operation of hydrogen refueling stations, which can refuel hydrogen cars.

Our electrolysis plants are ideally suited for the production of green hydrogen from renewable energy sources such as wind and solar power.

Both alkaline and PEM electrolysers are available. Alkaline electrolysers use caustic potash as the electrolyte and have been in large-scale use for a long time. PEM electrolyzers function like inverted fuel cells and use a solid polymer membrane as the electrolyte.


Type H2-Production [Nm³/h] Gas quality
Large-scale H2 electrolysis plant Alkaline 16–1000 ≥ 99,999%
Compact stationary H2 production Alkaline 5–15 ≥ 99,999%
PEM-Electrolyzer PEM 1–100 ≥ 99,999%