By Loz Blain
January 17, 2023
https://newatlas.com/automotive/amogy-f ... MAIL_ID%5D
Claiming a system-level energy density 5X higher than batteries, Amogy has rolled out "the world's first ammonia-powered, zero-emission semi truck." It holds about 900 kWh of energy, like the Tesla Semi, but you can refuel it in about eight minutes.
Ammonia does a better job of storing hydrogen than hydrogen itself, in many ways, and it could help clean up some difficult industries that require high-density energy. Brooklyn company Amogy has now presented a world-first ammonia-powered semi truck.
Ammonia has two chief advantages over hydrogen as an energy carrier. One is the fact that it's a liquid at ambient temperature and pressure levels, making it a ton easier to store, transport and handle; hydrogen either needs to be heavily compressed to around 700 bar, or else kept cryogenically cooled as a liquid, to just 20.28 K (−252.87 °C; −423.17 °F) – both of these are energy-intensive processes. The second is how much energy it carries: by volume, nearly three times as much as hydrogen gas, and by weight, more than 20 times as much as today's lithium batteries.