Cited by 101CO2 Sequestration and Geologic InteractionsCarbon Dioxide Capture TechnologiesCalcium Carbonate Crystallization and Inhibition

Directed precipitation of hydrated and anhydrous magnesium carbonates for carbon storage

Swanson, Edward J., Fricker, Kyle J., Sun, Michael, Park, Ah-Hyung Alissa·2014·Phys. Chem. Chem. Phys.

Abstract

Magnesite is the most desirable phase within the magnesium carbonate family for carbon storage for a number of reasons: magnesium efficiency, omission of additional crystal waters and thermodynamic stability. For large-scale carbonation to be a viable industrial process, magnesite precipitation must be made to occur rapidly and reliably. Unfortunately, the formation of metastable hydrated magnesium carbonate phases (e.g. MgCO3·3H2O and Mg5(CO3)4(OH)2·4H2O) interferes with the production of anhydrous magnesite under a variety of reaction conditions because magnesite crystals are slower to both nucleate and grow compared to the hydrated carbonate phases. Furthermore, the reaction conditions required for the formation of each magnesium carbonate phases have not been well understood with conflicting literature data. In this study, the effects of both magnesite (MgCO3) and inert (Al2O3) seed particles on the precipitation of magnesium carbonates from a Mg(OH)2 slurry were explored. It was interesting that MgCO3 seeding was shown to accelerate anhydrous magnesite growth at temperatures (80-150 °C), where it would normally not form in short time scale. Since the specific surface areas of MgCO3 and Al2O3 seeding particles were similar, this phenomenon was due to the difference in the surface chemistry of two seeding particles. By providing a template with similar chemistry for the growth of magnesite, the precipitation of anhydrous magnesite was demonstrated. The effect of temperature on seeded carbonation was also investigated. A comparison with published MgCO3 precipitation rate laws indicated that the precipitation of magnesite was limited by either CO2 adsorption from the gas phase or the dissolution rate of Mg(OH)2.

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Registry

Crossref · 10.1039/c4cp03491k

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  • The alkalinity of the solution contributes to increase CO3 2- concentration in the slurry, thus inducing exclusive formation of magnesite in the heat aging step (20 to 90 °C).

    “The authors propose that the alkalinity of the solution contributes to increase the CO 3 2-concentration in the slurry, thus inducing the exclusive formation of magnesite in the heat aging step (20 to 90 °C).148”
  • Use of magnesite seeds can completely bypass the formation of hydrated carbonate phases, and could be practically implemented through the addition of a product slip stream into the reactor.

    “Use of magnesite seeds can completely bypass the formation of hydrated carbonate phases, and could be practically implemented through the addition of a product slip stream into the reactor.67”

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Authors
Swanson, E. J., Fricker, K. J., Sun, M., & Park, A.-H. A.
Affiliations
Columbia University (US)
Corresponding author
Park, Ah-Hyung Alissa
Venue
Phys. Chem. Chem. Phys.
Published
2014-09-29
Volume
16
Issue
42
Pages
23440-23450
ISSN
  • 1463-9076 (ISSN-L)
  • 1463-9084
OpenAlex
W2085556033
Cited by
101
References
44
Citations by year
2026: 8 · 2025: 12 · 2024: 13 · 2023: 11 · 2022: 8 · 2021: 7 · 2020: 12 · 2019: 12 · 2018: 3 · 2017: 4 · 2016: 7 · 2015: 3 · 2014: 1
FWCI
3.84
Type
journal article
Language
en
Open access
closed
Locations
  • Physical Chemistry Chemical Physics (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation (0846846)
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
  • Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
  • Physical Sciences › Materials Science › Biomaterials › Calcium Carbonate Crystallization and Inhibition
Keywords
magnesite, magnesium carbonate, carbon storage, carbonation, seeded precipitation, nucleation and growth, CO2 adsorption, temperature effects, precipitation kinetics

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