By Mike Scott | Although the fundamentals of direct air capture are fairly standard – huge facilities with massive fans drawing air in to remove the CO2, normally in a remote landscape – there are a number of technologies to do it. But all of them are trying to bring down the high energy needs, and hence cost, of DAC.
The key divide is between high-temperature and low-temperature DAC. Two of the three most established DAC companies, Swiss-based Climeworks and Global Thermostat, based in Colorado, use low-temperature technologies, with sorbents that attract CO2 molecules to stick to the sorbent surface.
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