An electrolyser is a unit that uses electricity to split water (H₂O) into hydrogen (H₂) and oxygen (O₂) through the process of electrolysis. It is a key technology in the production of low-carbon hydrogen. There are several types of electrolysers, each with unique characteristics and applications:
Power-to-X (PTX): A broad term for converting electricity into other energy carriers like hydrogen.
Alkaline (ALK): A mature and cost-effective technology, widely used for large-scale hydrogen production.
Anion Exchange Membrane (AEM): An emerging technology combining benefits of alkaline and PEM systems.
Proton Exchange Membrane (PEM): Offers fast response times and is well-suited for pairing with variable renewable energy.
Solid Oxide Electrolyser Cell (SOEC): Operates at high temperatures and can achieve high efficiencies, especially in industrial settings.