I found one problem with your proposal.
The amount of energy required to reverse that process would be inherently greater than the amount of energy released to begin with.
You'd be spending $20 to save $10. That would make this process almost automatically more expensive than pumping oil out of the ground.
If you burn a $20 of Gasoline in a small portable generator, you do NOT get $20 of electricity at Grid Electric rates.
When you currently charge the battery in your cell phone, you put more energy into charging that battery, than the cell phone gets to extract from it on discharge. The same thing occurs when you charge an all-electric car.
When you burn gasoline, by thermo-dynamic laws, you can only extract a portion, usually less than 50% of the available energy to perform "Work" from your engine. Some engines are more efficient than others, such as a Diesel Cycle or Sterling Cycle engine, compared to an Otto Cycle Engine.
This does NOT mean that an Otto Cycle Engine won't work, most of us use them daily, it just means we lose some energy of the "ideal" extraction of the energy from the fuel.
If you look carefully at the equations and text I provided in the post, I acknowledge this.
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O + 35 MJ/L
16 CO2 + 18 H2O + ~100 MJ/L → 2 C8H18 + 25 O2
You put in 100 MJ/L to get out 35 MJ/L. So what?!
Its 35 MJ/L that you can store, with a few trace stabilizer chemicals, for up to 10-20 YEARS, and it is not limited by the length of your power cord.
So, you put a 10 KW peak wind turbine, for a particular day it is generating an average of 5 KW for 24 hours.
5000 * 24 * 60 * 60 = 432 MJ which means you could produce 4.3 liters of fuel. This is enough for most of our daily commutes to work.
Done on a large scale using mirror array solar power towers or much larger wind turbines, plenty of fuel could be synthesized as well as the hydrocarbon feed stocks for fertilizers and plastics.
You won’t be using the SynthGas to produce electricity; you’ll be using to make stored energy for mobile applications such as personal transportation.
Even with the energy effificency in production, as a system, SynthGas is overall 5 times more efficent than the BEST possible mobile battery stored energy vehicles, and allot safer as well.
We WILL run out of fossil fuels. Long before we run out, it will become too dirty, as we scrape the bottom of the barrel for oil containing large amounts of sulfur, dioxins and other pollutants.
Using SynthGas means we keep the energy investment in the current gasoline vehicles and fuel distribution system, we just get the fuel from a new, renewable, sustainable source.