How it Works
The CPH2 technology combines our Membrane-Free Electrolyser™ (MFE) with cryogenic separation to deliver pure hydrogen and pure oxygen as separate gases. This approach to hydrogen generation is both unique and patented.
The stack is simple in its design and with sustainable credentials as it is constructed from readily available materials which can be reused or recycled at the end of its operational life.
How does the electrolyser work?
- Incoming water (1) is mixed with electrolyte and travels to the stack (2) where the chemical reaction happens, and the mixed hydrogen and oxygen gas is generated.
- The mixed gas continues its journey through the balance of the plant to the dryers (3).
- The wet gas enters the dryers, where desiccant removes the water from the mixed gas stream, and the gas continues its journey to the Cryogen for separation (4).
We separate the mixed gas in the cryogenics systems using cold temperatures, which liquefies the oxygen and leaves pure hydrogen as a gas. The cold hydrogen and liquid oxygen return through a patent-protected three-stream heat exchanger, which receives the incoming mixed gas, and the oxygen regasifies.
As the hydrogen exits as a gas, it performs a crucial pre-cooling function on the incoming gas. By the time the mixed gas reaches the bottom of the heat exchanger, the oxygen has already transitioned into a liquid state. The separated gases then proceed through the purity meters.
