Electrochemical Carbon Dioxide Capture and Concentration

Abstract

Electrochemical carbon capture and concentration (eCCC) offers a promising alternative to thermochemical processes as it circumvents the limitations of temperature-driven capture and release. This review will discuss a wide range of eCCC approaches, starting with the first examples reported in the 1960s and 1970s, then transitioning into more recent approaches and future outlooks. For each approach, the achievements in the field, current challenges, and opportunities for improvement will be described. This review is a comprehensive survey of the eCCC field and evaluates the chemical, theoretical, and electrochemical engineering aspects of different methods to aid in the development of modern economical eCCC technologies that can be utilized in largescale carbon capture and sequestration (CCS) processes. CONTENTS 5.4.

Assessing the Kinetics of Quinone–CO2 Adduct Formation for Electrochemically Mediated Carbon Capture

“…To validate our hypothesis, k bimolecular values were calculated and compared with the thermodynamic indicator K binding , defined as the CO 2 -binding constant of quinone dianions. K binding is calculated using eq , which has been previously adopted to evaluate the CO 2 -binding strength. , K normalb normali normaln normald normali normaln normalg = exp ( F R T Δ E 2 ) .25em − .25em 1 false[ normalC normalO 2 false] R is the ideal gas constant, T is the temperature, Δ E 2 is the shift of the second redox potential ( E 2 ) between N 2 and CO 2 , and [CO 2 ] is the concentration of dissolved CO 2 .…”

“…K binding is calculated using eq 5, 27 which has been previously adopted to evaluate the CO 2 -binding strength. 17,28 = [ ] ( )…”

Enhancing Supercapacitive Swing Adsorption of CO2 with Advanced Activated Carbon Electrodes

“…[13,14] Electrochemical CO 2 capture techniques have gained considerable attention in recent years. [5,7,[15][16][17][18][19] They avoid the energy penalty associated with thermal and pressure cycling. Among them, supercapacitive swing adsorption (SSA) is a promising emerging technology capable of reversibly capturing and releasing CO 2 by charging and discharging supercapacitor electrodes.…”

Enhanced CO2 Reactive Capture and Conversion Using Aminothiolate Ligand–Metal Interface

“…In recent years, excessive utilization of fossil fuels has caused increasing carbon dioxide (CO 2 ) concentration in the atmosphere and thus a severe global climate threat . CO 2 reactive capture − and conversion, for example, electrochemical CO 2 capture and CO 2 reduction reaction (CO 2 RR) into value-added hydrocarbons and alcohols, become a promising strategy to close the carbon loop and form a net-zero-carbon process . CO 2 can be converted through diverse approaches, such as biochemical, thermochemical, electrochemical, photochemical reactions, , and microwave. , Among these approaches, electrocatalytic CO 2 capture and reduction, powered by renewable electricity, is attractive because it has several advantages, including mild operating conditions, controllable reaction rates by tuning parameters like applied potentials, pH, and electrolyte anion/cation and economic feasibility .…”