Field Validation of Supercritical CO 2 Reactivity with Basalts
Continued global use of fossil fuels places a premium on developing technology solutions to minimize increases in atmospheric CO2 levels. CO2 storage in reactive basalts might be one of these solutions by permanently converting injected gaseous CO2 into solid carbonates. Herein we report results from a field demonstration where ~1000 MT of CO2 was injected into a natural basalt formation in Eastern Washington State. Following two years of post-injection monitoring, cores were obtained from within the injection zone and subjected to detailed physical and chemical analysis. Nodules found in vesicles throughout the cores were identified as the carbonate mineral, ankerite Ca[Fe, Mg, Mn](CO3)2. Carbon isotope analysis showed the nodules are chemically distinct as compared with natural carbonates present in the basalt and clear correlation with the isotopic signature of the injected CO2. These findings provide field validation of rapid mineralization rates observed from years of laboratory testing with basalts.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1344633
- Report Number(s):
- PNNL-SA--119127; 48820; AA7050000
- Journal Information:
- Environmental Science & Technology Letters, Journal Name: Environmental Science & Technology Letters Journal Issue: 1 Vol. 4; ISSN 2328-8930
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
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