Figure 3. Electrochemical CO2 capture via SSE. a, Schematic illustration of traditional DAC techniques through adsorption/absorption-desorption cycle with temperature and/or pressure control. b, DAC based on the Kraft process using NaOH as the absorbent. Reproduced with permission of Ref. [47]. Copyright 2016, American Chemical Society. c, CO2 recovery from SSE during CO2RR and the distribution of the recovered gas under different operating current. Reproduced with permission of Ref. [46]. Copyright 2022, Springer Nature. d, CO2 capture from dilute gas sources by coupling ORR/OER redox in SSE and the CO2 capture rate under series of current density [54]. Reproduced with permission of Ref. [54]. Copyright 2023, Springer Nature. e, CO2 capture and regeneration from (bi)carbonates using HER/HOR redox in SSE and the CO2 regeneration rate under different cell voltage with varied NaHCO3 concentrations [55]. Reproduced with permission of Ref. [55]. Copyright 2024, Springer Nature.
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