The use of hydrogen in the energy transition
The challenge

In the course of the energy transition, hydrogen will play a decisive role as an energy storage medium. Electrolysis splits water into hydrogen and oxygen. A widely used process for this is alkaline electrolysis (AEL), in which water is mixed with potassium hydroxide (KOH) to form an alkaline solution. Splitting then takes place at nickel-based electrodes, which are separated from each other by a gas-impermeable membrane.

The technical challenge in this process is that common metallic valve materials are not resistant to potassium hydroxide. At the same time, however, resistant plastic-based materials cannot withstand the high pressures and temperatures. NOPA was commissioned to develop valves that can withstand the extreme conditions of alkaline electrolysis and ensure safe use.