Change Hydrogen Powered Cars

As mentioned earlier, separation of C02 at concentrated sources is easier than from the environment, and carbon capture at upstream decarbonizes many subsequent economic sectors. However, it does require significant changes in the existing infrastructure of power and chemical plants. Furthermore, approximately half of all emissions arise from small, distributed sources. Many of these emitters are vehicles for which onboard capture is not practical. Thus, unless all the existing automobiles are replaced by either hydrogen-powered fuel cell cars or electric cars, the capture of C02 from the air provides another alternative for small mobile emitters. 

As to the cost of the power plant, the final goal would be 50/kW, or about 5000 for one electric car. The cost of the power plant depends not only on the cost of the fuel cell stack as such, but also on the cost of ah auxiliary units and systems, including hydrogen storage and supply. The authors do not rule out the possibility that the goal could be achieved when changing over to mass production of such power plants (many millions of units). 

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