One hydrogen fuel technology uses ammonia (NH3) to store hydrogen. Where do we get all the ammonia, and what happens to the nitrogen waste?
Ammonia is relatively easy to manufacture in large quantities and is one of the most commonly-produced inorganic compounds in industry today. Its main use is in HVAC systems (Heating, Ventilating, and Air Conditioning) as a refrigerant, in heat exchangers, and in other applications where coolants are required. If it is ever used in a commercial and cost-effective fuel cell application, the existing infrastructure will need to be scaled up to meet the new requirements, but would not have to be created from scratch. Surplus nitrogen would likely find its way into the fertilizer industry, which is one of the largest consumers of nitrogen compounds compounds today.
