Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 167, Issue 13, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1945-7111/abbbb9
Keywords
CO2 Separation; Direct-Air Capture; Alkaline Media; Anion Exchange Membrane; Electrodialysis
Funding
- Shell's New Energy Research and Technology (NERT) Program
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This review focuses on research advancements in electrochemical methods of CO(2)separation as part of the broader field of CO(2)capture. Such methods are a potentially effective way of separating CO(2)from dilute gas mixtures (e.g., flue gas, air) such that it can be sequestered or recycled for other purposes. Electrodialysis using a liquid electrolyte capture solution is the most thoroughly explored electrochemical approach for CO(2)capture. The purpose of this review is to provide a broad overview of developments in the field, highlighting and harmonizing relevant figures of merit such as specific energy consumption and faradaic efficiency. In addition, the use of alkaline membranes is separately surveyed as a promising means of electrochemical CO(2)separation, as their CO(2)transport phenomena are well understood within the context of alkaline fuel cells or electrochemical CO(2)reduction. Recent materials advancements enable the use and modification of these membranes to promote electromigration of (bi)-carbonate ions, the result being CO(2)concentration on the anode side of an electrochemical cell.
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