T 7 e chnologies - Direct Air Carbon Capture (DAC)

This multi-stage process is required in order to overcome the limitations of the low atmospheric CO2 concentration, and the lower ability of enrichment possible with a single membrane compared with liquid absorption or solid adsorption. [...] In addition, to reach the requirement of 30 gigatonnes of CO2 capture per year would take of the order of 12-20% of total global energy supply. [...] Furthermore, these energy costs are only for the creation of the materials required for massively upscaled DAC of 30 gigatonnes of CO2 capture per year; they do not include the energy required to run the processes themselves. [...] If the CO2 concentration in the atmosphere significantly decreases due to large-scale carbon capture, then this equilibrium will shift, and CO2 will be released into the atmosphere from the oceans. [...] The credits rise from $35/tonne CO2 in enhanced oil recovery (EOR) to $50/tonne CO2 stored, and apply to a wide range of industrial facilities down to those producing 100000 tonnes of CO2 per year and to applications that use more than 25000 tonnes CO2.