Accelerating in Situ CO2 Mineralization: Detailed Exploration of Kinetics, Reaction Mechanisms, and Mineral Product Formation

CO2 mineralization offers a promising approach for long-term carbon capture and storage by converting CO2 into stable carbonate minerals. This study explores the optimization of CO2 mineralization under varying chemical conditions to enhance reaction kinetics and maximize carbonate formation. The use of amine-based accelerators, such as glycine, was investigated to increase reaction rates and improve the efficiency of mineral trapping processes. Experimental work involved systematically varying calcium chloride and accelerator concentrations, as well as examining the effects of temperature and solvent composition on reaction outcomes.

The results demonstrated that glycine not only accelerates CO2 mineralization but also acts as a pH buffer, improving the overall absorption efficiency of CO2. Analytical techniques including XRD, FT-IR, and TGA were employed to characterize the mineral products, confirming the formation of calcium carbonate in polymorphs such as calcite, aragonite, and vaterite. This work highlights the potential of amine-accelerated mineralization as a scalable and energy-efficient solution for CO2 sequestration, offering insights into improving the feasibility of mineral-based carbon capture technologies.