Cited by 29CO2 Sequestration and Geologic InteractionsConcrete and Cement Materials ResearchCarbon Dioxide Capture Technologies

Pressurized in situ X-ray diffraction insights into super/subcritical carbonation reaction pathways of steelmaking slags and constituent silicate minerals

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Chai, Ye Eun, Miller, Quin R.S., Schaef, H. Todd, Barpaga, Dushyant, Bakhshoodeh, Reza, Bodor, Marius, Van Gerven, Tom, Santos, Rafael M.·2021·The Journal of Supercritical Fluids

Abstract

Abstract This study explores mineral carbonation of industrial stainless steelmaking slags and relevant synthetic constituent minerals via in situ pressurized X-ray diffraction, to clarify carbonation reaction pathways and efficiency for carbon storage and waste valorization. The primary mineral phases of Argon Oxygen Decarburization (AOD) and Continuous Casting (CC) slags, namely, akermanite, bredigite, cuspidine, merwinite, and β- and γ-C2S, were reacted in a custom-built beryllium-capped XRD reactor filled with either water-saturated (wet) subcritical CO2(g), or wet supercritical CO2(SC), in a series of carbonation experiments. Formation of calcite and aragonite was observed for most Ca-bearing minerals, transient precipitation of metastable vaterite was observed, while carbonation of AOD and CC slags in CO2(SC) resulted in hydrated crystalline calcium carbonates and indirect evidence of amorphous carbonate. Results obtained suggest that low-pressure subcritical carbonation routes are attractive for standalone slag carbonation processes, while high-pressure supercritical carbonation routes are amiable to symbiotic integration with CO2(SC)-generating green technologies.

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Crossref · 10.1016/j.supflu.2021.105191

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  • Adsorbed water nanofilms can readily mediate the nucleation and growth of metastable intermediates, including nesquehonite, hydromagnesite, aragonite, and amorphous Mg/Ca carbonates, as well as facilitate transformations of carbonate minerals, including dolomite recrystallization and hydrated calcite surface dissolution.

    “Although structurally and dimensionally highly-constrained, adsorbed water nanofilms can readily mediate the nucleation and growth of metastable intermediates, including nesquehonite (MgCO3•3H2O) 55 , hydromagnesite [Mg5(CO3)4(OH)2•4H2O] 50 , aragonite (CaCO3) 56 , and amorphous Mg/Ca carbonates, 53,57 as well as facilitate transformations of carbonate minerals, including dolomite [CaMg(CO3)2] rec”

    From Molecular-scale mechanisms of CO2 mineralization in nanoscale interfacial water films (2022) · cites this paper as [56]

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  1. [1]1. IPCC, Climate Change 2007: Synthesis Report. Contribution of Working Groups I, II and III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Core Writing Team, Pachauri, R.K and Reisinger, A. (eds.)]. IPCC, Geneva, Switzerland, 2007 104 pp.
  2. [10]10. G. Kashwani, A Review of CO 2 Sequestration via Fly Ash and Steel Slag, Emirati Eng. Abroad Lett. 1 (2020) 1-11.
  3. [31]31. F. Engström, Mineralogical influence on leaching behaviour of steelmaking slags, Doctoral dissertation. Luleå University of Technology, 2010.

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Authors
Chai, Y. E., Miller, Q. R. S., Schaef, H. T., Barpaga, D., Bakhshoodeh, R., Bodor, M., Van Gerven, T., & Santos, R. M.
Affiliations
  • University of Guelph (CA)
  • Pacific Northwest National Laboratory (US)
  • The University of Western Australia (AU)
  • "Dunarea de Jos" University of Galati (RO)
Corresponding author
Santos, Rafael M.
Venue
The Journal of Supercritical Fluids
Publisher
Elsevier BV
Published
2021-05
Volume
171
Pages
105191
ISSN
0896-8446 (ISSN-L)
OpenAlex
W3126833717
Cited by
29
References
62
Citations by year
2026: 4 · 2025: 10 · 2024: 3 · 2023: 8 · 2022: 4
FWCI
1.22
Type
journal article
Language
en
Open access
Locations
  • The Journal of Supercritical Fluids (acceptedVersion)
  • Lirias (submittedVersion, other-oa)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • UWA Profiles and Research Repository (UWA) (submittedVersion)
  • The Atrium (University of Guelph) (submittedVersion)
Funders
  • U.S. Department of Energy
  • Fonds Wetenschappelijk Onderzoek
  • Office of Science
  • Natural Sciences and Engineering Research Council of Canada
  • Basic Energy Sciences
  • Chemical Sciences, Geosciences, and Biosciences Division
  • Pacific Northwest National Laboratory
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
  • Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
  • Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
Keywords
CO2 mineralization, steel slag, supercritical carbon dioxide, subcritical CO2, akermanite, bredigite, cuspidine, merwinite, calcium silicate hydrate, calcium carbonate, calcite, aragonite, vaterite, amorphous carbonates, carbon storage, waste valorization

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