Common minerals called silicates react with water and atmospheric CO2 to form stable bicarbonate ions and solid carbonate minerals–a process known as weathering. But it can take hundreds to thousands of years to complete. A new practical, low-cost process converts slow-weathering silicates into much more reactive minerals that capture and store atmospheric carbon quickly. The process would require less than half the energy used by leading direct air capture technologies. It uses heat to transform common minerals into materials that spontaneously pull carbon from the atmosphere, permanently sequestering it. These reactive materials can be produced in conventional kilns, like those used to make cement.
chemistry.stanford.edu/news/scientists-discover-low-cost-way-trap-carbon-using-common-rocks