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Efficient method to capture carbon dioxide from the atmosphere

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Re: Efficient method to capture carbon dioxide from the atmosphere

#91

Post by saubeidl »

PeterHolzwarth wrote: post #84

Well, instead of repeating myself manually, I'll paste in a comment of mine here from a past discussion on carbon capture: It's easy to forget why there is a bit of a challenge to getting C02 out of the air: there's so little of it, comparatively. In order, air is, broadly, made up of the following: Nitrogen: %78.084 Oxygen: %20.946 Argon: %00.934 CO2: %00.042 The stuff is essentially beyond a rounding error - it rea…

What if one started emitting Nitrogen, Oxygen and Argon in the right proportions instead to get the mix right again?

Re: Efficient method to capture carbon dioxide from the atmosphere

#92

Post by witte »

omgJustTest wrote: post #72
condiment wrote: post #45

At current rates of emissions, we’re only about 20 years away from people needing to install CO2 scrubbers in their homes. Soda lime, or calcium hydroxide, is the current state of the art. We use that in an anesthesia and in saltwater aquariums and in scuba rebreathers. An idealized system can capture 500 mg per gram, but in practice you only capture around 250mg/g. This outperforms the method in the article but it’s…

citation for the co2 scrubbers in home need?

[dead]

Re: Efficient method to capture carbon dioxide from the atmosphere

#93

Post by potato3732842 »

net01 wrote: post #7

What are the use cases of CO2 appart for making my Coke fizz?

You can think of industrial CO2 use as basically the same as nitrogen but a little worse and several fucktons cheaper.

CO2 is fairly inert. This makes it useful. Welding steel is a typical example of something you can use CO2 to shield. There are many other examples in the chemicals industries of things like that where you want to do something at a "higher than natural on earth" temperature to make a reaction happen or happen faster but you don't want that reaction to happen with oxygen all around.

And on the other end of the temperature spectrum....dry ice.

Re: Efficient method to capture carbon dioxide from the atmosphere

#94

Post by dotancohen »

saubeidl wrote: post #91
PeterHolzwarth wrote: post #84

Well, instead of repeating myself manually, I'll paste in a comment of mine here from a past discussion on carbon capture: It's easy to forget why there is a bit of a challenge to getting C02 out of the air: there's so little of it, comparatively. In order, air is, broadly, made up of the following: Nitrogen: %78.084 Oxygen: %20.946 Argon: %00.934 CO2: %00.042 The stuff is essentially beyond a rounding error - it rea…

What if one started emitting Nitrogen, Oxygen and Argon in the right proportions instead to get the mix right again?

These gases are refined from air to begin with.

Re: Efficient method to capture carbon dioxide from the atmosphere

#95

Post by saubeidl »

dotancohen wrote: post #94
saubeidl wrote: post #91

Earlier quoted context omitted.

What if one started emitting Nitrogen, Oxygen and Argon in the right proportions instead to get the mix right again?

These gases are refined from air to begin with.

Do they need to be?

Re: Efficient method to capture carbon dioxide from the atmosphere

#96

Post by teiferer »

gonzo41 wrote: post #46
jmclnx wrote: post #41

Earlier quoted context omitted.

I agree, plus were would one store the CO2 ? To get back to "1980", I really doubt puling CO2 from the atmosphere will ever work. Another concern, who will pay for maintenance ? See this for why you cannot let CO2 escape from underground storage: https://en.wikipedia.org/wiki/Lake_Nyos_disaster If stored near a populated area, hundreds of thousands could be kill, including all animals and insects, in a matter of minu…

Well as far as storing it goes, if you can capture it, turn it into a solid and stick it in the ground. Imagine you were growing a huge biomass that you harvest, dry out, and then store. We know how the bacteria and processes that stripped co2 from the atmosphere in the past, we just need to do that in a big way. Good thing we have places on earth that are huge and flat and growing algae won't be a problem. And then…

As long as leading figures either claim it's a hoax or that it's not necessary to do sth about it, none of this matters anywhere.

This is less of a technogical problem than it is a political one, I'm afraid.

Re: Efficient method to capture carbon dioxide from the atmosphere

#97

Post by caturopath »

PeterHolzwarth wrote: post #84

Well, instead of repeating myself manually, I'll paste in a comment of mine here from a past discussion on carbon capture: It's easy to forget why there is a bit of a challenge to getting C02 out of the air: there's so little of it, comparatively. In order, air is, broadly, made up of the following: Nitrogen: %78.084 Oxygen: %20.946 Argon: %00.934 CO2: %00.042 The stuff is essentially beyond a rounding error - it rea…

Plants seem to manage it okay.

Re: Efficient method to capture carbon dioxide from the atmosphere

#99

Post by teiferer »

jmclnx wrote: post #41
condensedcrab wrote: post #13

Direct air capture imo can’t escape the scaling problem - when the feedstock has CO2 at ~400 ppm the economics simply won’t work out despite various oil companies backing one off systems around the globe. Capturing CO2 at the source (power plant, etc) would be simpler to reach economic viability but without incentives it’s dead on arrival. I believe the IRA infra bill had put a price ~$50/ton of CO2 captured.

I agree, plus were would one store the CO2 ? To get back to "1980", I really doubt puling CO2 from the atmosphere will ever work. Another concern, who will pay for maintenance ? See this for why you cannot let CO2 escape from underground storage: https://en.wikipedia.org/wiki/Lake_Nyos_disaster If stored near a populated area, hundreds of thousands could be kill, including all animals and insects, in a matter of minu…

> I would rather live near a nuclear waste site than a CO2 Site.

If it's between immediate death and a slow one of cancer, I'm not sure your choice is the obvious one.

Re: Efficient method to capture carbon dioxide from the atmosphere

#100

Post by GZGavinZhao »

saubeidl wrote: post #91
PeterHolzwarth wrote: post #84

Well, instead of repeating myself manually, I'll paste in a comment of mine here from a past discussion on carbon capture: It's easy to forget why there is a bit of a challenge to getting C02 out of the air: there's so little of it, comparatively. In order, air is, broadly, made up of the following: Nitrogen: %78.084 Oxygen: %20.946 Argon: %00.934 CO2: %00.042 The stuff is essentially beyond a rounding error - it rea…

What if one started emitting Nitrogen, Oxygen and Argon in the right proportions instead to get the mix right again?

My naive guess is that since CO2 takes up so few percentage, you would need an unfathomable amount of N, O, and Ar to get the mix right..?
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