John Banister
Rather than capture CO2 out of the atmosphere where the concentration is very low, why not work with someone like Schwarze Pumpe who captures power plant CO2 before it is released into the atmosphere. Then, they can close the cycle, using captured CO2 from hydrocarbon consumption directly for hydrocarbon creation.
Racqia Dvorak
Thorium Nuclear power plants plus this and Algae-Based Bio-diesel? Sometimes it seems like no one out there in power cares about the future or even about truly changing the world.
Joel Detrow
That's pretty impressive! This means we can continue using diesel where electric doesn't make sense, but in a way which is carbon-neutral, leaving sequestered carbon right where it is.
Bob64
I believe that converting electricity to liquid fuel is going to be the future of transport energy supply. Liquid fuels have a lot of advantages over batteries, including high energy density, ease of transport and quick refueling. Planes are going to need liquid fuels, batteries are just too heavy. Once solar/wind become the main source of energy, I believe that electricity prices will drop. Very cheap energy is the next big step forwards for the world economy. Many things that are currently too expensive because of energy costs will become viable, leading to massive changes. The next big economic revolution, the "energy revolution" is just around the corner.
mhpr262
@John Banister:
They are indeed using CO2 that is the exhaust of some power or manufacturing plant nearby that would otherwise have gone into the atmosphere.
Slowburn
The engine runs quieter. I call bullcookie on that.
The improvement in efficiency is appreciated but I doubt is cost competitive with even synthetic oil.
Pat Pending
"....by taking electricity from renewable sources like wind, solar or hydropower and using it to produce hydrogen from water via reversible electrolysis."
Am I missing something here? Why not liquefy the Hydrogen using the above energy sources and run gas engines directly on it?
Exhaust product = water.

Mike Giles
How much will it cost t the pump?
Captain Obvious
The US Navy did the same. It's expensive, because it uses a lot of electricity, essentially storing it as chemical fuel. Then you have the inefficiency of the engine that burns it. It's faster to refuel than charging a battery, though.
Делян Ангелов
>>Why not liquefy the Hydrogen using the above energy sources and run gas engines directly on it?
Hydrogen is very inconvenient for storage or transportation, since it leaks very easily (the hydrogen molecules are very small), it is odorless so leaks will not be detected early enough, and it makes highly combustible, even explosive fuel-air mixtures ... Fore more, see: http://en.wikipedia.org/wiki/Hydrogen_safety