In September 2020, the world's first shipment of blue ammonia was dispatched from Saudi Arabia to Japan, where it was used for power generation.

Meanwhile, another potential usage of ammonia rests in fuelling the traditional vehicles running on an internal combustion engine.



In conclusion, ammonia has the potential to play an important role in the transformation of the global energy system as a green and less-CO2 intensive energy source to meet the world's growing energy demand.

The power sector, which would undergo perhaps the most drastic structural shift in this transition when considering the global "greening the energy industry'' drive, could greatly benefit from utilising ammonia - whether blue or green - in meeting its emissions obligations.

Doing more research into Hydrogen Fuel cells and Forklifts, Government Policy (here in Scotland it is a very interesting policy). It is a very complicated subject for sure. But reading various articles it seems Ammonia would be about 80% efficient as a fuel source, they don't specify the parameters for efficiency.
But from what I can tell it seems there are issues with the toxicity and corrosive nature of ammonia hence the idea to use it as a carrier that can be converted back to hydrogen.
Its a very dark rabbit hole to go down for sure.