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 4 2022
Accepted
08 7 2022
First published
18 7 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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