Supercapacitive Swing Adsorption of Carbon Dioxide: Current Status and Perspectives

Supercapacitive swing adsorption (SSA) is a newly discovered electrochemically driven carbon dioxide capture method using the principle of electric double-layer capacitor, which achieves the purpose of adsorption and desorption of CO2 by charging and discharging the supercapacitive electrodes. Based on this method, gas separation devices were designed which could adsorb CO2 from a mixture of carbon dioxide and nitrogen, and a series of factors affecting the CO2 adsorption capacity were explored. This review briefly introduces the SSA mechanism and the structural design of SSA modules, and analyzes the factors influencing the performance of SSA from multiple aspects, with emphasis on electrode materials, in order to find ways to improve the CO2 adsorption capacity of SSA modules. The supercapacitor swing adsorption module can adsorb carbon dioxide. If it is applied to adsorb high concentration carbon dioxide gas (such as exhaust gas and flue gas) and emit low concentration carbon dioxide gas in the future, it will provide a great help to solve the global climate problem and achieve the goal of carbon neutrality.image