Accelerating mineral carbonation using carbonic anhydrase
Abstract
Carbonic anhydrase (CA) enzymes have gained considerable attention for their potential use in carbon dioxide (CO2) capture technologies because they are able to catalyze rapidly the interconversion of aqueous CO2 and bicarbonate. However, there are challenges for widespread implementation including the need to develop mineralization process routes for permanent carbon storage. Mineral carbonation of highly reactive feedstocks may be limited by the supply rate of CO2. This rate limitation can be directly addressed by incorporating enzyme-catalyzed CO2 hydration. This study examined the effects of bovine carbonic anhydrase (BCA) and CO2-rich gas streams on the carbonation rate of brucite [Mg(OH)2], a highly reactive mineral. Alkaline brucite slurries were amended with BCA and supplied with 10% CO2 gas while aqueous chemistry and solids were monitored throughout the experiments (hours to days). In comparison to controls, brucite carbonation using BCA was accelerated by up to 240%. Nesquehonite [MgCO3·3H2O] precipitation limited the accumulation of hydrated CO2 species, apparently preventing BCA from catalyzing the dehydration reaction. Geochemical models reproduce observed reaction progress in all experiments, revealing a linear correlation between CO2 uptake and carbonation rate. Data demonstrates that carbonation in BCA-amended reactors remained limited by CO2 supply, implying further acceleration is possible.
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Using carbonic anhydrase catalyzes the hydration of aqueous CO2.
“For instance, using carbonic anhydrase catalyzes the hydration of aqueous CO2 [54,90].”
From Integrated Mineral Carbonation of Ultramafic Mine Deposits—A Review (2018) · cites this paper as [90]
In laboratory experiments, brucite carbonation remains CO2-limited even when exposing it to CO2-rich fluids.
“In laboratory experiments, brucite carbonation remains CO2-limited even when exposing it to CO2-rich fluids [89,90].”
From Integrated Mineral Carbonation of Ultramafic Mine Deposits—A Review (2018) · cites this paper as [90]
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“In laboratory experiments, brucite carbonation remains CO2-limited even when exposing it to CO2-rich fluids [89,90].”
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- Authors
- Power, I. M., Harrison, A. L., & Dipple, G. M.
- Affiliations
- University of British Columbia (CA)
- Corresponding author
- Power, Ian M.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-02-17
- Volume
- 50
- Issue
- 5
- Pages
- 2610-2618
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2271612146
- Cited by
- 154
- References
- 16
- Citations by year
- 2026: 23 · 2025: 27 · 2024: 10 · 2023: 12 · 2022: 12 · 2021: 15 · 2020: 13 · 2019: 16 · 2018: 13 · 2017: 12 · 2016: 1
- FWCI
- 8.74
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Science & Technology (publishedVersion)
- PubMed (publishedVersion)
- Bern Open Repository and Information System (University of Bern) (submittedVersion)
- Funders
- Natural Sciences and Engineering Research Council of Canada
- Carbon Management Canada
- University of British Columbia
- Topics
- Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Enzyme function and inhibition
- Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
- Keywords
- carbonic anhydrase, CO2 mineralization, CO2 capture, brucite, nesquehonite, CO2 hydration, CO2 sequestration, enzyme catalysis, magnesium hydroxide, geochemical modeling
- MeSH terms
- Animals, Carbon Dioxide, Carbonates, Carbonic Anhydrases, Cattle, Hydrogen-Ion Concentration, Magnesium Hydroxide, Microscopy, Electron, Scanning, Minerals, Models, Theoretical, Water, Carbon Sequestration
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