CFD modelling of gas-electrolyte behaviour in alkaline water electrolysis cells by Kevin Van Droogenbroek

In the coming years, considerable efforts will have to be made to reduce greenhouse gas emissions to as close to zero as possible in order to limit the increase in global average temperature. One way to decarbonize a wide range of sectors – including transport, iron and steel production and chemicals manufacture – is to use green hydrogen as an energy carrier to store and deliver usable and clean energy. At present, the most mature technology for producing green hydrogen is Alkaline Water Electrolysis (AWE). In essence, this process involves the separation of oxygen and hydrogen from water through the application of renewably-sourced current to an alkaline solution. The primary hurdle associated with this technology revolves around improving the efficiency of the electrolyzer.

During this presentation, we will delve into the invaluable role of Computational Fluid Dynamics (CFD) simulations in assessing the fluid behaviour within an electrolysis cell. Through modeling and simulation, the goal will be to identify optimal configurations that promote electrolyte homogenization and efficient removal of gas bubbles. This, in turn, is expected to enhance the overall performance of the electrolyzer and facilitate the transition towards a greener, more sustainable energy landscape.