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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
#12This solves only part of the problem: it captures CO2 and can release it later. But you still need to figure out what to do with this CO2, how to turn it into something useful.
It can be used as an energy storage by compressing / releasing + powering a turbine. Good for storing excess wind + solar energy.
Re: Efficient method to capture carbon dioxide from the atmosphere
#13Direct 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.
Re: Efficient method to capture carbon dioxide from the atmosphere
#14A better title would be "More efficient method to capture CO2 from the atmosphere." The method is not objectively efficient, but may be more efficient than other methods (solvents/sorbents) used for DAC.
Re: Efficient method to capture carbon dioxide from the atmosphere
#15What are the use cases of CO2 appart for making my Coke fizz?
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Re: Efficient method to capture carbon dioxide from the atmosphere
#16What are the use cases of CO2 appart for making my Coke fizz?
The main commercial use is enhanced oil recovery—shooting it into old wells to extract more oil (super ironic if captured from the air).
One application I think is neat is that it’s a pretty robust refrigerant in a heat pump application.
Re: Efficient method to capture carbon dioxide from the atmosphere
#17Economics rules everything. How much does this cost vs simply planting trees, when the value of harvesting the trees is included? Since tree farms are generally profitable, and wood is expensive, it seems this method is likely to be economically less efficient.
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Re: Efficient method to capture carbon dioxide from the atmosphere
#18This solves only part of the problem: it captures CO2 and can release it later. But you still need to figure out what to do with this CO2, how to turn it into something useful.
you can inject it into peridotites and let it mineralize. there is enough exposed peridotite outcrops in the world that we could inject all the co2 produced and store it there indefinitely. this process also produces elemental hydrogen.
Do you have any links on research on that? Serious question.
Re: Efficient method to capture carbon dioxide from the atmosphere
#19This solves only part of the problem: it captures CO2 and can release it later. But you still need to figure out what to do with this CO2, how to turn it into something useful.
If it is reasonably energy efficient, this could be used to feed a methane processor, especially on Mars.
Re: Efficient method to capture carbon dioxide from the atmosphere
#20The thing people don't think about with regards to CO2 capture is that you have to get the atmosphere in order to capture CO2 from it. You essentially have to suck the entire atmosphere into these carbon capture facilities.
Using something like this to capture carbon from an exhaust pipe might be viable, but scrubbing CO2 out of the atmosphere is not even remotely viable. There's just too much air out there.