SCHEDULED MAINTENANCE
Activation energy of magnesite (MgCO3) precipitation: recent insights from olivine carbonation studies
Quin R. S.
Miller 
*a
and
H. Todd
Schaef
*a
*a
and
H. Todd
Schaef
*a
Abstract
We present two new activation energies for magnesite precipitation during forsteritic olivine (Mg2−xFexSiO4; 0.18 ≤ x ≤ 0.26) carbonation in high-pressure carbon dioxide. These new activation energies of 89 ± 6 and 85 ± 1 kJ mol−1 are consistent with the literature for magnesite precipitation in aqueous media and extend the temperature range to encompass 90 °C to 50 °C. These insights will help improve understanding of mineral transformation kinetics in the subsurface, including carbon storage in mafic-ultramafic environments, and aid in the development of carbon dioxide removal (CDR) and net negative-emissions technologies.
- This article is part of the themed collection: Urgent communications in RSC Environmental Science journals
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