Climate love

Wil Sillen

20 w


Climate love

Icelandic company turns CO2 to stone

The CO2 is dissolved in seawater and then pumped into a basaltic rock formation through a network of injection wells. Once in the subsurface, the injected CO2 reacts with the rock to form a stable carbonate mineral, which ensures long-term storage. The timescale of this process surprised scientists at first. In the pilot, 95% of the injected CO2 was mineralized within two years, much faster than previously thought.

How it works
Carbonated water is acidic. The more carbon you can put in water, the more acidic the liquid becomes. Carbfix's carbonated water reacts with underground rocks and releases available cations such as calcium, magnesium and iron into the water stream. Over time, these elements combine with the dissolved CO2 to form carbonates that fill the empty space (pores) in the rocks. The carbonates are stable for thousands of years and can thus be considered permanently stored.

The injected carbonated water is denser than the surrounding water in the geological formation and therefore tends to sink after being injected. This differs from other carbon capture and storage methods, which rely on capstone to prevent leakage of gaseous CO2.

The method does not work with all rock types, but it does work with basalt, which Iceland is rich in. In addition, young basalt rocks are highly fractured and porous, so that water easily seeps through the interconnecting cracks and voids underground. This simplifies the process.

Where it works
Carbfix has put together a mapping tool that shows the feasibility of applying the Carbfix technology for industries and countries to assess as part of their climate strategy. The global storage potential, according to the company, is greater than the emissions from the combustion of all fossil fuels on earth. It is estimated that Europe could theoretically store at least 4,000 billion tons of CO2 in rocks and the United States at least 7,500 billion tons.
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  • Muhammad Fahd Khan

    20 w

    Good fixing of carbs!

    • Edwin wangombe

      20 w

      Woow this is a milestone that will help cut down the amount of CO2 in the atmosphere.. kudos

      • Daryl Cleary

        20 w

        If we don’t stop pollution at its source of burning fuels then we will never catch up on reduction or sequestering.

        • imani ally

          20 w

          This one will be good

          • Tabitha Kimani

            20 w

            This will be a great contribution towards climate restoration.

            • Peter Kamau

              20 w

              Could this be a game changer in carbon sequestration?

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