Technology
What is it?
An electric current is supplied to isolated nitrogenase enzymes, which reduce nitrogen gas (N2) and water to form ammonia, whilst also producing hydrogen.
Why is it important?
Ammonia can be synthesised under ambient conditions via the application of an electric current.
Characteristics
- Volumetric hydrogen density: High (10.7kg H2 / m3 at 10 bar and 25°C)
- Gravimetric hydrogen density: High (17.8% by mass)
- Storage conditions: Liquid at ambient temperature, 10-11 bar pressure
Benefits
- Occurs at ambient temperature and pressure. Less energy intensive than Haber-Bosch
- Occurs at neutral pH
Limitations
- Separation of ammonia and hydrogen required after production
- Biological system is difficult to control
- Metallo-protein is oxygen sensitive and usually negated by biology
RD&D priorities
- Separation of ammonia and hydrogen required after production
- Biological system is difficult to control
- Metallo-protein is oxygen sensitive and usually negated by biology
Known active organisations
- CSIRO