Researchers turn CO2 into stone using natural processes

limestoneA new paper published this week shows it’s possible to turn carbon dioxide into limestone, but the price tag isn’t cheap. Scientists pumped large amounts of carbon dioxide (CO2) and water into underground basalt rocks, and the resulting chemical mix reacted with the rocks’ calcium magnesium to form limestone. Limestone is considered a more permanent solution for storing CO2 because it’s now been converted to stone. The technique was published in a new in the journal Science.

“It’s no longer a gas,” said Juerg Matter, a co-author of the study at the University of Southampton in England. “Basically carbon dioxide converted it into stone.” Previous experiments done in the lab showed it could take thousands or hundreds of thousands of years for this process to occur. In this study, it took about two years and converted 95 percent of the gas.

Another process is known as carbon capture sequester (CCS), where large amounts of CO2 are pumped and stored deep underground to slow down global warming. Once the gas is pumped into the ground, it can be stored in into depleted oil wells, but it runs the risk of escaping. With this new method, the gas is converted to stone. Previous efforts to store large amounts of CO2 in the ground using CCS have made little progress.

The entire process described in the new paper is natural, as carbon dioxide mixed with water forms a weak acid. This acid breaks down the calcium magnesium, bonds with it, and forms limestone made of calcium carbonate (not the same as sedimentary limestone). But the cost of $17 per ton may be cost-prohibitive. That’s more than a couple times more expensive than shooting CO2 into old wells using CCS.

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  • Avatar

    Amber

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    Carbon dioxide helps plants and trees grow
    hence higher levels used in greenhouses .
    Is the EPA planning on banning the use of added carbon dioxide in greenhouses seeing as they view it as a pollutant ? Will joggers be restricted on the amount of carbon dioxide they are allowed to exhale ?
    The reality is a warming world is a very good thing and as we all know climate changes so enjoy it while it lasts .

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  • Avatar

    GR82DRV

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    This might be relevant if CO2 were some kind of pollutant…

    The entire climate change agenda is an exercise in wasting money.

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  • Avatar

    MIner49er

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    Nature already does a great job of converting carbon dioxide into limestone. Carbonates form in seawater and soils through biological and chemical calcification processes. The simplified formula is CO2 + CaO => CaCO3. Anyone can make calcite quickly in a kitchen by mixing carbonated water with quicklime.

    Carbon dioxide from fossil fuels use does not affect climate whatsoever. Maybe climate is warming. It is supposed to be warming, because earth is in an interglacial period. Which begs the question why some scientists and government agencies try to pad the record by “adjusting” prior-period temperature data.

    Its very simple. Nature sequesters CO2 as limestone (calcite). The higher the atmospheric CO2 partial pressure, the faster it becomes limestone.

    Climate change results from a combination of (non-CO2) causes, such as sunspots, solar orbital variations, cosmic rays’ effect on clouds, and plate tectonics (well documented elsewhere). But it cannot be caused by CO2 arising from fossil fuels use, because nature efficiently recycles CO2 as carbonate minerals (limestone) through numerous calcification processes.

    Only 3% of CO2 emissions come from fossil fuels use. Most of the rest arises from rotting vegetation in swamps and jungles. Carbon dioxide emissions and fossil fuels use are beneficial, and climate change is a false premise for regulating them. See http://www.thegwpf.com/28155/.

    There is no empirical evidence that CO2 from fossil fuels affects climate. Human activities cause only about 3% of all carbon dioxide (CO2) emissions to the atmosphere. The rest arise from rotting vegetation. Changes in temperature cause changes in CO2 emissions from these sources, and are not caused by them.

    CO2 is in equilibrium. Mineral carbonates are the ultimate repository of atmospheric CO2. Anyone who passed 10th grade chemistry can know this using public information. Limestone and marble are familiar forms of mineral carbonate. CO2 is an essential component of mineral carbonate (CaCO3, for calcium). See the paper http://bit.ly/1NziTF4 by Norwegian researcher Tom Segalstad.

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  • Avatar

    old44

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    Why in the hell do we want to store plant food as rock?
    Two things a commercial grower does is to provide a greenhouse to elevate temperature and and raise elevated CO2 levels to improve growing conditions. What is the fascination with retuning us to the Little Ice Age.

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    ninetyninepct

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    Have the treehuggers even bothered to find out how much CO2 is vented by the flash frozen food industry? I demand frozen fruit be banned.

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  • Avatar

    Amber

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    When the departing President stands up and spouts complete climagedon nonsense
    it is a disrespectful insult to the citizens .

    Why are the Democrats so set on sinking the job prospects of millions and propping up grant seeking businesses that only exist because the President authorized the payment of $$Billions in tax payer subsidies ?

    This multi $$billion dollar heist needs to be fully exposed and the ring leaders jailed for life .

    Reply

  • Avatar

    David Lewis

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    The Paris agreement is guaranteed to fail for two reasons.

    One, even if anthropological climate change were a real problem, this agreement is too expensive.

    Second, the problem is not real and as time goes on real world data shows this more and more. The luke warming theory is getting more attention and as it become obvious this is what is happening the high costs of the climate change agenda will have less and less support.

    Reply

  • Avatar

    GR82DRV

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    This is the last gasp of determined socialists (re-branded as environmentalists) to cast the world’s economy into chaos while handing totalitarian power to their “fellow travelers” in the leftist movement. Climate change is merely their Trojan horse.

    None of it makes sense to practical, honest people. But if you are determined to foist a failed sociopolitical system on the world you must start from ashes so that even Marxist rule looks good by comparison.

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