Issue 4, 2022

Activation energy of magnesite (MgCO3) precipitation: recent insights from olivine carbonation studies

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.

Graphical abstract: Activation energy of magnesite (MgCO3) precipitation: recent insights from olivine carbonation studies

Article information

Article type
Communication
Submitted
08 apr 2022
Accepted
08 jul 2022
First published
18 jul 2022
This article is Open Access
Creative Commons BY license

Environ. Sci.: Adv., 2022,1, 426-429

Activation energy of magnesite (MgCO3) precipitation: recent insights from olivine carbonation studies

Q. R. S. Miller and H. T. Schaef, Environ. Sci.: Adv., 2022, 1, 426 DOI: 10.1039/D2VA00066K

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