this post was submitted on 07 Jun 2024
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152
How Much Energy Would It Take to Pull Carbon Dioxide out of the Air? (www.wired.com)
submitted 5 months ago by jeffw to c/technology
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[–] 3volver 6 points 5 months ago (2 children)

In order for that we need more renewable energy, otherwise we're just burning fossil fuel, producing carbon dioxide, and then capturing it. Solar, wind, algae biofuel, renewable diesel, green hydrogen, etc. We have to be careful how we use energy otherwise we're just producing carbon dioxide to capture carbon dioxide.

[–] mriguy 6 points 5 months ago (1 children)

People keep complaining that solar and wind give us “too much electricity at the wrong time”, causing power prices to go negative (as if this is a problem). Having a beneficial process like co2 removal that you can do at any time of day (the co2 isn’t going anywhere) that would soak up all that energy seems like a win win.

[–] 3volver 2 points 5 months ago (1 children)

Yea, and one of the best ways to sequester carbon dioxide is by using algae. Algae biofuels are a great way out of the climate crisis. Use excess energy to produce algae biofuel, net negative emissions.

[–] [email protected] 1 points 5 months ago (1 children)

But if it's used as fuel, wouldn't that typically return the CO~2~? Just about all fuels are burned, which creates the CO~2~, and you have to make sure the energy you use to make and transport the fuel is clean, too.

[–] 3volver 1 points 5 months ago (1 children)

Yes, but overall it would be net negative carbon dioxide emissions.

[–] [email protected] 1 points 5 months ago

How does it stay net negative? Carbon goes into the fuel, which is good, but doesn't like all of it come back out when burned for fuel? My understanding is that these fuels can only really achieve neutrality, and that assumes clean energy used to make the fuel.

[–] Poach 4 points 5 months ago (2 children)

Looks at US corn production for ethanol 👀