Originally Posted by TOTONKA
So, we needed to do something
The "something" is coal gassification and then GTL (gas to liquid). The price of fossil petro is high enough right now to make it worth the ROI. I read somewhere that as long as fossil petro is above $60/bbl it makes most of these alternative liquids viable economically. The US military is already purchasing GTL for some significant fraction of their aviation fuel.
Hydrogen does not have anywhere near the energy density that heptane and cetane (diesel) do. Cellulosic EtOH is promising, but still doesn't have the energy density.
I read something today about sodium batteries (for plug-in electrics). Anyone heard of these before? I had thought that getting the price down on LiIons was the holy grail for plug-ins.