Lappeenrannan-lahden Teknillinen Yliopisto Lut

Abb Technology Oy

Antti Kosonen

Jero Ahola

Markku Niemelä

Tuomo Lindh

Vesa Ruuskanen

Joonas Koponen

Anton Poluektov

Markku Niemela

A system for alkaline water electrolysis includes electrolysis cells, a hydrogen separator tank, a first piping from the electrolysis cells to the hydrogen separator tank, an oxygen separator tank, a second piping from the electrolysis cells to the oxygen separator tank, and a third piping for conducting liquid electrolyte from the hydrogen separator tank and from the oxygen separator tank back to the electrolysis cells. The system includes an ultrasound source for applying ultrasound on the liquid electrolyte contained by the first piping. The ultrasound enhances the separation of dissolved hydrogen gas from the liquid electrolyte contained by the first piping, and thus energy efficiency of the alkaline water electrolysis is improved. Furthermore, a safe control range of the alkaline water electrolysis is broadened because crossover of hydrogen gas to an oxygen side of the system is reduced.

System and a method for alkaline water electrolysis

Growing community of inventors

Lappeenranta, Finland

Antti Kosonen