A Vanadium Redox Flow Process for Carbon Capture and Energy Storage DOI Creative Commons
Mohsen Afshari, Abdelrahman Refaie, Prince Aleta

et al.

Published: May 23, 2024

Climate change mitigation by decreasing worldwide CO2 emissions is an urgent and demanding challenge that requires innovative technical solutions. This work, inspired vanadium redox flow batteries (VRFB), introduces integrated electrochemical process for carbon capture energy storage. It utilizes established ferricyanide couples pH modulation desorption absorbent regeneration. The developed consumes electricity during the daytime—when renewable available—to desorb charge cell, it can regenerate further absorption while releasing to grid nighttime when solar power unavailable. research explores fundamentals scalability potential, through extensive study of system's thermodynamics, transport phenomena, kinetics, bench-scale operations. Cyclic voltammetry (CV) was utilized thermodynamics process, mapping profiles identify ideal potential windows operation. CV results pinpointed a 0.3 V Nernstian overpotential as thermodynamic minimum required cell Additionally, polarization studies were conducted select practical operating identifying 0.5 optimal cycle provide sufficient polarity overcome activation barriers in addition potential. Mass transfer analysis balanced conductivity efficiency, with 1:1 ratio identified redox-active species background electrolyte concentration. To enhance kinetics reactions, plasma treatment electrode surfaces implemented, resulting 43% decrease resistance, measured impedance spectroscopy (EIS) analysis. Finally, operation system demonstrated consumption 54 kJ/mol CO2, which competitive other technologies. Besides its competitiveness, offers multiple additional advantages, including elimination precious metal electrodes, oxygen insensitivity flue gas, VRFB technology, unique ability function battery regeneration enabling efficient day-night

Language: Английский

A Vanadium Redox Flow Process for Carbon Capture and Energy Storage DOI Creative Commons
Mohsen Afshari, Abdelrahman Refaie, Prince Aleta

et al.

Published: May 23, 2024

Climate change mitigation by decreasing worldwide CO2 emissions is an urgent and demanding challenge that requires innovative technical solutions. This work, inspired vanadium redox flow batteries (VRFB), introduces integrated electrochemical process for carbon capture energy storage. It utilizes established ferricyanide couples pH modulation desorption absorbent regeneration. The developed consumes electricity during the daytime—when renewable available—to desorb charge cell, it can regenerate further absorption while releasing to grid nighttime when solar power unavailable. research explores fundamentals scalability potential, through extensive study of system's thermodynamics, transport phenomena, kinetics, bench-scale operations. Cyclic voltammetry (CV) was utilized thermodynamics process, mapping profiles identify ideal potential windows operation. CV results pinpointed a 0.3 V Nernstian overpotential as thermodynamic minimum required cell Additionally, polarization studies were conducted select practical operating identifying 0.5 optimal cycle provide sufficient polarity overcome activation barriers in addition potential. Mass transfer analysis balanced conductivity efficiency, with 1:1 ratio identified redox-active species background electrolyte concentration. To enhance kinetics reactions, plasma treatment electrode surfaces implemented, resulting 43% decrease resistance, measured impedance spectroscopy (EIS) analysis. Finally, operation system demonstrated consumption 54 kJ/mol CO2, which competitive other technologies. Besides its competitiveness, offers multiple additional advantages, including elimination precious metal electrodes, oxygen insensitivity flue gas, VRFB technology, unique ability function battery regeneration enabling efficient day-night

Language: Английский

Citations

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