Speaker
Description
Fast carbon dioxide (CO2) mineralization has been recently observed in mafic and ultramafic rocks, promoting CO2 stabilization and reducing risky reliance on caprock integrity. However, there are currently many unknowns surrounding these new observations, including reaction kinetics for different minerals. In the current study, we apply neutron reflectometry (NR) to make in situ observations of the fluid-rock interface to characterize these geochemical interactions for olivine, serpentine, and basalt thin films. We observed minimal reactivity for basalt compared with ultramafic minerals. Surprising, more alteration of serpentine was observed than olivine, despite reported lower reactivities. Through this work, we can advance our understanding of dissolution and secondary mineral precipitation during GCS in mafic/ultramafic rocks, which will allow optimization of CO2 mineralization through improved site selection and more accurate geochemical modeling.
| Country | USA |
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