I assume itd work for a minute and then reverse due to pressure?
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nah there’s tons of space and gas injection is a thing we do all the time afaik
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Answers would be: too expensive, or unworkable (volume of flue too large), at least in-situ (maybe you would need to colocate the plant near a place that can hold that much gas.
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(Not that I've checked the, but the space of possible answers seems to be those two as key suspect)
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As it’s gaseous, wouldn’t you need to pressurize the injection? What pressure can an injection well hold? Liquid injection hydro-fractures and expands volume, gas?
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If you flip the smokestack upside down the plant takes in CO2 and outputs coal. Engineering 101 ryan
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you’re hired
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A few reasons: - costs: You would need to compress the whole flue gasses. Instead of only 10%. - when CO2 is compressed it becomes liquid. The other gasses at other temp/pressure. - the CO2 will either dissolve in the formation water or react to carbonates. The other gasses not
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So in traditional power plant CCS they’re actually injecting a liquid? Does that mean you use a gravity-fed well?
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You can’t inject unprocessed flue gas into the ground because it doesn’t store long term (will likely bubble back up, undoing the effort) and is dangerous (could erupt violently and/or suffocate nearby people with a sudden excess of CO2)
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That’s why you process it into a supercritical fluid, which is much more dense than a gas but requires 3-4x more energy if you don’t separate out the nitrogen and would therefore be a lot more expensive than just doing separation in the first place
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