Capturing and storing CO2

At the storage location, the liquid CO2 is injected to a depth of about 1,000 metres. Because of the pressure at this depth, it is 500 times denser here than as a gas at the earth’s surface and therefore makes full use of the storage volume. Storage occurs either physically (CO2 is prevented from escaping by the pressure and cap rock) or chemically (new mineral formation). Once the injection is completed, the expansion of the CO2 underground is secured with anti-leak sealing (right-hand image) and continually monitored.