[ulrikrasmussen]

I'm not sure if we are talking past each other, but: https://en.wikipedia.org/wiki/Electrofuel

Electrofuels, also known as e-fuels, are a class of synthetic fuels which function as drop-in replacement fuels for internal combustion engines. They are manufactured using captured carbon dioxide or carbon monoxide, together with hydrogen obtained from water split.

It is my understanding that there is actually a shortage of concentrated co2 if we want to produce e-fuels as drop-in replacements in e.g. planes.

[analog31]

All ideas for "fuels" hinge on the future availability of an economical energy source, which would have to be either solar or nuclear.

[outworlder]

I wonder what happened to the Navy's attempts at synthesize aviation fuel in aircraft carriers. They have plenty of power (newer carriers have even more) and reducing or eliminating the need of support craft for fueling would be a massive bonus.

They've been looking at that for a while, I don't know what issues they encountered.

[thinkcontext]

They couldn't get it to be efficient enough.

[ulrikrasmussen]

Yes of course, I am not claiming otherwise.

My point was just about the scarcity of concentrated co2.