2 ms·

It turns out a better energy storage system than hydrogen, actually. Think it has better energy density, easier to liquefy, and if you’re making hydrogen it see

It turns out a better energy storage system than hydrogen, actually. Think it has better energy density, easier to liquefy, and if you’re making hydrogen it seems to be a relatively easy step to add nitrogen (easily available everywhere as well). And you can burn ammonia in engines that are closer in design to their gasoline counterparts, as opposed to completely new hydrogen fuel cells. And the density is high enough for it to be a serious contender for aircraft fuel. So yeah, ammonia, assuming it’s made from green hydrogen (renewable energy) as opposed to blue hydrogen (from natural gas or oil with hand wavy carbon capture), has a lot of interesting prospects.

semi-extrinsic 5y ago
You can burn hydrogen in ICE engines as well. In the 2000's both BMW and Mazda did limited series developments of cars that can be switched between burning gasoline and hydrogen - the BMW 750 with the M73 V12, and the Mazda RX-8 with the dual rotor Renesis Wankel engine. Currently batteries (and possibly fuel cells) seem to be winning out for cars, but burning hydrogen in large piston engines seems to be a promising option for ships. I've heard Yanmar is currently developing a large slow two-stroke marine engine burning hydrogen, probably in the 5 MW range.