Water-Alternating-Gas (WAG) injection as a plausible scheme to optimize carbon dioxide mineralization in the basaltic oceanic crust

Awolayo, Dapo; Lauer, R. M.; Tutolo, Ben; Obeso, Juan Carlos de; Nelson, Claire; Goldberg, David J.

doi:10.46427/gold2022.12268

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“…In scaling to injection rates of billions of tons of CO 2 per year, there is concern that slow reactions will limit the rates of mineralization (Tutolo et al, 2021). In a case where OAC and OAE may complement each other, research is ongoing as to whether this reduced CO 2 carbonation efficiency at the gigaton scale can be increased by pretreating, or co-treating (Awolayo et al, 2022), the injection formation with the acid generated by OAE. This approach aims to leverage the orders-of-magnitude increase in mineral dissolution rates and solubilities at low pH values to enhance the concentrations of carbonate forming cations.…”

Section: Discussionmentioning

confidence: 99%

Pathways for marine carbon dioxide removal using electrochemical acid-base generation

Eisaman

2024

Front. Clim.

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Research over the past decade has resulted in various methods for removing CO2 from the atmosphere using seawater and electrochemically generated acids and bases. This Perspective aims to present a unified framework for comparing these approaches. Specifically, these methods can all be seen as falling into one of two categories: those that result in a net increase in ocean alkalinity and use the “ocean as a sponge” for atmospheric CO2 (ocean alkalinity enhancement, or OAE) and those that cycle ocean alkalinity and use the “ocean as a pump” for atmospheric CO2 (ocean alkalinity cycling, or OAC). In this Perspective, approaches for marine carbon dioxide removal (mCDR) using electrochemistry are compared using this framework, and the similarities and differences of these two categories are explored.

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Section: Discussionmentioning

confidence: 99%

Pathways for marine carbon dioxide removal using electrochemical acid-base generation

Eisaman

2024

Front. Clim.

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Water-Alternating-Gas (WAG) injection as a plausible scheme to optimize carbon dioxide mineralization in the basaltic oceanic crust

Cited by 1 publication

References 0 publications

Pathways for marine carbon dioxide removal using electrochemical acid-base generation

Pathways for marine carbon dioxide removal using electrochemical acid-base generation

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