What if they used co2 and h2o, or with some adjustment just h2o. Could this be used to build hydrocarbons? My physics and chemistry failed math.
You have all the bits to make them and there seems to be a "simple" way of collecting energy.
There are two ideas here. Hydrocarbons from nano-tubes and water or co2 and h2o processed via a nano tube catalyst.
My guess is the required pressure and or reaction time will be to high to be practical.
Joke: Gas from soda-water and a straw.