Exploring the scope of capacitance-assisted electrochemical carbon dioxide capture

Abstract

Optimisation of a capacitance-assisted electrochemical carbon-capture process is facilitated by the physical separation of the graphite and aluminium anode electrodes. This facilitates graphite electrode recycling and enables high current and increased aluminium surface area experiments which fix carbon at a higher rate and the same cell-voltage. Quantification of the H cathode byproduct shows that this process could be a net energy producer if recycled aluminium is used as the sacrificial anode.

Electrochemical carbon capture processes for mitigation of CO2 emissions

“…The energy requirement for the optimized capture-mineralization processes was 230 kJ e mol −1 . 91 This estimation does not consider the energy cost for preparation of the metal electrode used in the process. In light of the current annual production rate for aluminum and steel and their recycling rate, it was predicted that the developed technology could annually capture and sequester 20–45 million tons of CO 2 using aluminum or ∼800 million tons using steel.…”

“…The energy requirement for the optimized capture-mineralization processes was 230 kJ e mol À1 . 91 This estimation does not consider the energy cost for preparation of the metal electrode used in the process.…”

A Vanadium Redox Flow Process for Carbon Capture and Energy Storage

“…Several ECC approaches have been developed, including the electrochemical generation of nucleophiles (EGN) [19][20][21][22][23][24], electrochemical capacitive adsorption (ECA) [25][26][27][28][29][30], electrochemically mediated amine regeneration (EMAR) [31][32][33][34][35][36], and electrochemical modulation of proton concentration (EMPC), also known as electrochemical pH swing [37][38][39][40][41][42][43]. These approaches differ in how they utilize redox reactions to capture and concentrate CO2.…”