Chemistry | KOH and NaOH | Inline potassium hydroxide (KOH) and sodium hydroxide (NaOH) measurement in the alkaline water electrolysis process for the production of green hydrogen

Alkaline water electrolysis for Power-to-X

The production of green hydrogen via alkaline water electrolysis will become a near future key parameter, especially for Power-to-X technology. Through the synthetic production of hydrogen via green electricity, other energy sources can be obtained or if possible di-rectly converted into energy. Currently, hydrogen is produced by means of natural gas reforming, but new inventions as well as the revival of the well-known technology of alkaline water electrolysis enable the production of green hydrogen. To do so, the chemi-cals KOH and NaOH as liquid alkaline electrolyte so-lution play a major role. The structure of an electrochemical cell consists of two conductive materials, so called electrodes, which are immersed in an ionically conductive liquid electro-lyte and electrically connected to each other. The sep-aration of water occurs in two partial reactions in the electrolysis cell. As soon as voltage is applied, hydro-gen is produced at the cathode and oxygen at the an-ode.
Potassium hydroxide (KOH) or sodium hydroxide (NaOH) is added as an electrolyte to increase the conductivity of the water.
For an efficient and reliable 24/7 monitoring of the electrolyte concentration, Anton Paar offers an easy-to-integrate and cost-efficient technology package consisting of the inline sound velocity sensor L- Sonic 5100 Version MON together with the power-ful evaluation unit Pico 3000.