CO 2 Mitigation via Capture and Chemical Conversion in Seawater
Abstract
A lab-scale seawater/mineral carbonate gas scrubber was found to remove up to 97% of CO(2) in a simulated flue gas stream at ambient temperature and pressure, with a large fraction of this carbon ultimately converted to dissolved calcium bicarbonate. After full equilibration with air, up to 85% of the captured carbon was retained in solution, that is, it did not degas or precipitate. Thus, above-ground CO(2) hydration and mineral carbonate scrubbing may provide a relatively simple point-source CO(2) capture and storage scheme at coastal locations. Such low-tech CO(2) mitigation could be especially relevant for retrofitting to existing power plants and for deployment in the developing world, the primary source of future CO(2) emissions. Addition of the resulting alkaline solution to the ocean may benefit marine ecosystems that are currently threatened by acidification, while also allowing the utilization of the vast potential of the sea to safely sequester anthropogenic carbon. This approach in essence hastens Nature's own very effective but slow CO(2) mitigation process; carbonate mineral weathering is a major consumer of excess atmospheric CO(2) and ocean acidity on geologic times scales.
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Mineral carbonation products (carbonates) may be used for ocean liming.
“Moreover, MC products (carbonates) may be used for ocean liming.15,16”
From A review of mineral carbonation technologies to sequester CO <sub>2</sub> (2014) · cites this paper as [15]
A lab-scale seawater/mineral carbonate gas scrubber was found to remove up to 97% of CO2 in a simulated flue gas stream at ambient temperature and pressure, with a large fraction of this carbon ultimately converted to dissolved calcium bicarbonate.
“A lab-scale seawater/mineral carbonate gas scrubber was found to remove up to 97% of CO 2 in a simulated flue gas stream at ambient temperature and pressure, with a large fraction of this carbon ultimately converted to dissolved calcium bicarbonate.15”
From A review of mineral carbonation technologies to sequester CO <sub>2</sub> (2014) · cites this paper as [15]
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- Authors
- Rau, G. H.
- Affiliations
- Lawrence Livermore National Laboratory (US)
- Corresponding author
- Rau, Greg H.
- ORCID
- Rau, Greg H.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-12-28
- Volume
- 45
- Issue
- 3
- Pages
- 1088-1092
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2315420205
- Cited by
- 134
- References
- 23
- Citations by year
- 2026: 14 · 2025: 17 · 2024: 10 · 2023: 21 · 2022: 12 · 2021: 7 · 2020: 5 · 2019: 9 · 2018: 5 · 2017: 6 · 2016: 2 · 2015: 4 · 2014: 7 · 2013: 8 · 2012: 5
- FWCI
- 9.13
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Science & Technology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
- Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
- Physical Sciences › Engineering › Mechanical Engineering › Industrial Gas Emission Control
- Keywords
- CO2 capture, calcium bicarbonate, flue gas scrubbing, CO2 sequestration, ocean alkalinity enhancement, ocean acidification, power plant retrofit, point source emissions, ocean carbon sequestration
- MeSH terms
- Carbon Dioxide, Hydrogen-Ion Concentration, Seawater, Water Pollutants, Chemical, Water Pollution, Chemical, Environmental Restoration and Remediation
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