Thread by @geoengineering1

🚨NEW STUDY🚨

🌊Recent study "presents the mass balances linked with #CarbonDioxideRemoval using seawater as both the source of reactants & as the reaction medium via electrolysis following the “Equatic” (formerly known as “SeaChange”) process."

🌊Details in a 🧵 below ⬇️
1/12

"The #Equatic process, broadly detailed in (pubs.acs.org/doi/full/10.10…), involves the application of an electric overpotential that splits H2O to form H+ & OH– ions, producing #acidity & #alkalinity, i.e., in addition to gaseous coproducts at the anode & cathode, respectively."
2/12

"The #alkalinity that results, i.e., via the steady electrolytic pH pump results in the rapid precipitation of CaCO3, hydrated magnesium #carbonates (e.g., nesquehonite & hydromagnesite, etc.) or Mg(OH)2 depending on the carbonate ion-activity in solution."
3/12

"This results in the trapping & hence, durable & permanent (at least ∼10000–100000 yrs) immobilization of #CO2 that was originally dissolved in H2O, & that is additionally #drawndown from the atmosphere within: ......"
4/12

Contd.....
"(a) mineral carbonates, and/or
(b) as solvated bicarbonate (HCO3–) & carbonate (CO32–) ions (i.e., due to the absorption of atmospheric CO2 into seawater having #EnhancedAlkalinity)."
5/12

"Taken together, these actions result in the net #removal of ∼4.6 kg of #CO2 per m3 of seawater catholyte processed."
6/12

"Geochemical simulations quantify the extents of net #CarbonDioxideRemoval including the dependencies on the process configuration."
7/12

"It is furthermore indicated that the efficiency of #realkalinization of the acidic anolyte using alkaline solids depends on their acid #neutralization capacity and dissolution reactivity."
8/12

Researchers of this study also "assess changes in seawater chemistry resulting from Mg(OH)2 dissolution with emphasis on the change in seawater #alkalinity and #saturation state."
9/12

"Overall, this analysis provides direct quantifications of the ability of the 𝐸𝑞𝑢𝑎𝑡𝑖𝑐 process to serve as a means for technological #CDR to mitigate the worst effects of accelerating #ClimateChange."
10/12

Read the open-access paper entitled: "Electrolytic Seawater Mineralization and the Mass Balances That Demonstrate Carbon Dioxide Removal" here ⬇️
pubs.acs.org/doi/full/10.10…

#CarbonDioxideRemoval

11/12

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