So why can/do we not capture the CO2 directly where it is released? For example for cars directly at the exhaust? Or for coal power plants at the chillen? Wouldn‘t it be much more effective to capture the CO2 there instead of trying to filter it out of the atmosphere?
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The primary way of capturing CO2 from the atmosphere is condensation. You take in atmospheric air and use cryogenics to cool it down and you remove different gasses as they condense out of the air. Thats not possible for a mobile vehicle and not possible for the quantities that a power plant produces (you’d have to capture the extremely hot air in a tank then give it enough time to condense, not really possible in an open system like a power plant).
Also, its costly and doesn’t make sense for simply removing gasses from the atmosphere. We use this process because we use the various gasses for industrial purposes.
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