Propane is usually made from natural gas and petroleum refining, but what if it was used as a means of energy storage for electricity? This is basically the same thing as producing hydrogen through electrolysis and using it in a fuel cell, without the problems. Autogas vehicles are practical and have a real world precedent and infrastructure already in place, so it doesn't seem so crazy to me as a means to overcome the battery problem. Having ten thousand pounds of batteries in a vehicle to give it the range, speed, and power of a fossil fuel vehicle just doesn't work and fuel cells have their own problems. Propane, on the other hand, has an energy density very similar to gasoline and no technical hurdles to overcome.

The idea would be to produce electricity through renewable means, and then combine energy, 4 H2O and 3 CO2 to become 1 C3H8 and 5 O2. As a bonus a wood gasifier could produce carbon monoxide/dioxide and electricity simultaneously, then get O2 fed back into it for more efficient burning. Butane production would be okay, as autogas contains that as well as propane, but methane would need to be avoided. Is such a thing possible/practical?

Thanks for reading!