Carbon capture may be the next big thing although it might double the energy cost for fossil fuel plants. It could be that a power station would pay you to capture the CO2 (although unless the facility was burning biomass the exercise would not be carbon neutral once the jet fuel was burnt). Its like cryogenic storage of hydrogen, very useful as a demonstration exercise but certainly not practicable in the short term. If you want to make fuel from CO2 I would grow seaweed and work out how to convert that to jet fuel - although the work so far hasn't been that successful, there could be a breakthrough in the future.