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Title: Activation energy of magnesite (MgCO 3 ) precipitation: recent insights from olivine carbonation studies

Journal Article · · Environmental Science. Advances
DOI:https://doi.org/10.1039/D2VA00066K· OSTI ID:1876673

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.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1876673
Alternate ID(s):
OSTI ID: 1906844
Report Number(s):
PNNL-SA-174595; ESANEB
Journal Information:
Environmental Science. Advances, Journal Name: Environmental Science. Advances Vol. 1 Journal Issue: 4; ISSN 2754-7000
Publisher:
Royal Society of Chemistry (RSC)Copyright Statement
Country of Publication:
United Kingdom
Language:
English

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