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A comment on Direct air capture: our technology to capture CO₂. Parent comment

Re:Direct air capture: our technology to capture CO₂ by stavros on Saturday May 27, 2023 @09:16AM (#36094575)
1000 kWh/ton to sequester, and how many tons per kWh to generate?

EDIT: Apparently, one ton of CO2 is released by 1000 kWh of electricity:

https://www.eia.gov/tools/faqs/faq.php?id=74&t=11

So you have a coal plant generating energy and emitting CO2 just for this factory next to it to capture all that CO2 again. Seems more efficient to just not run the coal factory.

It seems like this idea will be worthwhile when the last coal factory closes.

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Re:Direct air capture: our technology to capture CO₂ by cogman10 on Saturday May 27, 2023 @10:53AM (#36095298)
It'll always be more efficient not to emit carbon.

Imagine you have a teaspoon of salt and a cup of water.

Adding salt into the water is dead simple and requires little energy. Now how hard is it to remove that teaspoon of salt?

That's effectively what's happening with the atmosphere.

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