Re:Is it effective? (Score 1)

Yeah, but how much energy does generating one tonne of CO2 give? It still just capturing CO2, they need still more energy to eventually convert it to fuel

Burning a ton of coal for energy generates ~2000kWh of energy, and 3.7 tons of CO2 (since coal is mostly carbon). Using this device to sequester said CO2 is going to use 370 of those kWhs. So assuming there aren't any ineffiencies in scaling up the operation, we've just made coal carbon-neutral at a cost of about 20% of it's usefulness.