Is it possible to bury carbon dioxide in the ground?

Question

because i heard that scienctist are considering it to reduce CO2. Won't the gas be easily released from the ground?

Answer 1

Not in it's normal form (a gas). It can be mixed with chemicals which either trap the gas or react to produce something other than CO2. The resulting byproduct can then be more easily stored.

One proposed scheme involves capturing CO2 with sodium hydroxide, the resulting liquid can be pumped under pressure into deep bores drilled into the Earth's surface where it will be absorbed into porous rock. The temperature and pressure deep below the surface of the Earth would prevent escape upwards so the solution would remain trapped indefinitely.

Perhaps a better option is to use the resulting mixture in some other way and in this example it can be used by the oil industry.

If carbon dioxide were buried as a gas it would need to be hermetically sealed in some sort of pressurised chamber and the quantities involved would be prohibitive.

Answer 2

No, because they use rocks that are solid with few holes, llike granite. They can then plug up any remaining holes and get the co2 to a very high pressure inside of the caves. Think of it as a giant granite balloon. They can then get the pressure so high that the co2 turns into a liquid which has a harder time escaping.

Answer 3

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Answer 4

Oil companies use CO2 to pressurize oil wells to increase pressure and production. That process leaves the CO2 beneath the earth's surface.

Answer 5

yes,
that is what happened naturallyto produce our current environment, living organisms converted CO2 to various forms of carbon - fossil fuels, chalk etc to lock it out of the atmosphere.
And the gaia systems work, for free, to mainatain the levels of gasses suitable for life as we know it. http://www.ipcc.ch/unfccc_pdf/session3_martino.pdf

Unfortunatly we are now changing the enviornment so these organisms are failing (acidifying oceans, deforestation, agro-chemical intensive farming...) while at the same time releasing all the locked up carbon, fossil fuel, cement ...

So technically we can lock up Co2 by replicating the natural systems, but at huge cost, and needing even more energy to do this. We are already in energy debt by living of the fossil fuel reserves built up over millenia

Answer 6

I find this rather interesting.

We put out 30,000,000,000 tons of CO2 in the atmosphere every year.

To put that in perspective, that's 38 molecules of CO2 for every 100,000 molecules of air. It would take 5 years to change that 38 molecules to 39 molecules at the above rate.

Interesting, huh?

Answer 7

Yes, you can, but I don't think it would work very well. There are too many problems possible about it leaking back out of the ground. It would be better to transform it by planting more greenery.

Answer 8

The source describes some projects to do just that.