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I haven't crunched the numbers on this, but CO2 air capture is incredibly inefficient, and it consumes energy which itself releases heat. So if the amount of CO
by naasking 2y ago
I haven't crunched the numbers on this, but CO2 air capture is incredibly inefficient, and it consumes energy which itself releases heat. So if the amount of CO2 you capture reduces heat by X degrees but you release Y degrees in energy consumption to achieve that where Y > X, that would be one interpretation of "thermodynamically unviable". It seems implausible to me but not impossible.
- realusername 2y agoThe effect of the heat released in the air is negligible compared to the greenhouse effect. CO2 capture might be economically unviable but nothing physically prevents it from working.
- naasking 2y ago> The effect of the heat released in the air is negligible compared to the greenhouse effect. And the amount of CO2 gathered by direct air capture is also negligible, so you can't just hand wave a position that one negligible amount is obviously greater than another.