Enabling the full potential of water
Hydron Energy develops water electrolyser technology based on proton conductive membranes: so called polymer electrolyte membrane water electrolysis (PEMWE). PEMWE is an advanced type of water electrolysis technology with unique features.
Electrolysis of water is the decomposition of water (H2O) into oxygen (O2) and hydrogen gas (H2) by means of electric current. A PEM based water electrolysis cell consists of two compartments which are separated by a membrane electrode assembly (MEA). Water is supplied to one compartment of the cell and is decomposed at the anode (positive electrode) into hydrogen ions (protons: H+) and molecular oxygen (O2). This reaction is called Oxygen Evolution Reaction (OER).
The protons are transported through the membrane to the other cell compartment under the influence of an applied potential. In this compartment, at the cathode (negative electrode) the protons and electrons are recombined to form molecular hydrogen (H2).
This reaction is called the Hydrogen Evolution Reaction (HER). As long as electric current and water is supplied to the cell, the electrolysis process is facilitated and gasses evolve efficiently. Multiple electrolysis cell are stacked to form the electrolyser module, hence the name stack.
The number of electrolyser cells, the active area per cell and the amount of current drawn, defines the production capacity of an electrolyser stack.
Compared to conventional alkaline type electrolysers, PEMWE technology offers many advantages:
- High efficiency
- High current densities
- High hydrogen discharge pressure
- Lower molecular gas crossover due to the application of a polymer membrane resulting in a wide operating range and high purity hydrogen (and oxygen) production
- Rapid response time to ramping up and down due to fast kinetics
- Compact cell and stack design leading to systems with a small foot print
At Hydron Energy, we are committed to capturing the full potential of PEM based water electrolysis by offering state-of-the-art electrolyser stacks.