Using Calcium Carbonate to Capture CO2 From the Atmosphere

We use naturally available minerals, particularly limestone or calcium carbonate to capture CO2 from the atmosphere. In our process that limestone is sent into a reactor, and it temperatures around 900 degrees Celsius calcium carbonate breaks apart into two parts calcium oxide and co2. So we can capture that co2 in a near pure form and store that underground to keep it kind of sequestered away from the atmosphere but the calcium oxide we've produced from that reaction is highly thirsty for co2. We've essentially given the mineral superpowers and it wants to take out co2 from the sky.