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N Cranenburgh, From thin air: can converting atmospheric carbon into fuel close the carbon loop?, Energy, 12 August 2019

In Canada, Carbon Engineering has derived a scheme of direct air capture (DAC) in which CO2 is extracted from the atmosphere, dissolved in an alkali solution to form carbonate, then heated as a solid salt to 900°C and converted to pure CO2 and hence into a fuel.. However, this is energy intensive, and should be compared with systems of carbon capture and storage (CCS) from industrial exhaust gases. 

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