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Overview of direct air capture by Dr Hanak
Do you know what direct air capture is?
It's a piece of an engineering kit that can suck CO2 directly out of thin air.
Whenever I speak about DAC, the same questions come up. I thought I'd share some of the answers here.
๐๐จ ๐ฐ๐ ๐ง๐๐๐ ๐๐๐ ๐๐ญ ๐๐ฅ๐ฅ?
I believe it depends. It depends on how well we will decarbonise our economy and whether our activities will converge towards the Paris Agreement targets.
๐๐ก๐๐ง ๐ฐ๐ ๐ฐ๐ข๐ฅ๐ฅ ๐ง๐๐๐ ๐๐๐?
I don't think we should be working towards a specific timeline here. We can deploy DAC now if it makes sense from a business perspective.
We may need to ramp up the deployment of DAC and other greenhouse gas removal technologies, if we fail to decarbonise our economy (i.e. 2030 and 2050).
๐๐ก๐๐ญ ๐๐ซ๐ ๐๐ก๐๐ฅ๐ฅ๐๐ง๐ ๐๐ฌ ๐จ๐ ๐๐๐?
CO2 concentration in the air is low (415ppm), making it a difficult separation. DAC also needs to be driven by low-carbon or renewable energy.
Energy requirement and volume of the contactors result in high OPEX and CAPEX. Currently, DAC is estimated to cost 200-500 โฌ/tCO2.
๐๐จ๐ฅ๐ฎ๐ญ๐ข๐จ๐ง๐ฌ?
There are several ways in which we can reduce the cost and improve the business case for DAC
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