Abstract: A carbon dioxide recovery system separates CO2 from a CO2 containing gas containing CO2 by an electrochemical reaction. The carbon dioxide recovery system includes an electrochemical cell having a working electrode and a counter electrode. The working electrode has a CO2 adsorbent that adsorbs CO2. When electrons are supplied from the counter electrode to the working electrode by applying a voltage between the working electrode and the counter electrode, the CO2 adsorbent combines with CO2 as the electrons are supplied. The working electrode has a working electrode conductive additive that forms a conductive path to the CO2 adsorbent. The working electrode conductive additive is a metal oxide having a structure in which an oxygen element is disposed around a metal element.

Abstract: Provided is a carbon dioxide recovery system that separates CO2 from a CO2-containing gas containing CO2 by an electrochemical reaction, and comprises an electrochemical cell comprising a working electrode containing a CO2 adsorbent, and a counter electrode. Application of a voltage between the working electrode and the counter electrode causes electrons to be supplied from the counter electrode to the working electrode, and enables the CO2 adsorbent to bind to CO2 as electrons are supplied. The CO2 adsorbent is a crystalline porous body, and has a molecular structure in which a functional group that exchanges electrons and binds to CO2 is regularly arranged.

Abstract: A carbon dioxide recovery system separates CO2 from gas containing CO2 via an electrochemical reaction. The carbon dioxide recovery system includes an electrochemical cell including a working electrode and a counter electrode. The working electrode includes CO2 adsorbent. The CO2 adsorbent adsorbs CO2 via an oxygen reduction reaction by using electrons supplied from the counter electrode to the working electrode when a first voltage is applied between the working electrode and the counter electrode. The oxygen reduction reaction produces active oxygen via reduction of O2. The CO2 adsorbent desorbs CO2 by discharging electrons from the working electrode to the counter electrode when a second voltage different from the first voltage is applied between the working electrode and the counter electrode. The CO2 adsorbent has a promoting function for promoting the oxygen reduction reaction.

Abstract: A carbon dioxide recovery system includes an electrochemical cell. The electrochemical cell includes a working electrode, a counter electrode, and an electrolytic solution. The working electrode includes a CO2 adsorbent. The working electrode and the counter electrode are disposed to sandwich the electrolytic solution therebetween. The CO2 adsorbent is configured to absorb CO2 in response to a voltage being applied between the working electrode and the counter electrode and electrons being supplied from the counter electrode to the working electrode. The CO2 adsorbent is a porous body having pores, and a pore diameter of the pores is larger than an ion diameter of the electrolytic solution.

Abstract: A carbon dioxide recovery system, which is configured to separate and recover carbon dioxide from a carbon dioxide containing gas, includes an adsorption unit that includes an adsorbent material that is configured to adsorb and desorb the carbon dioxide. The adsorbent material is configured to radiate heat in response to adsorption of the carbon dioxide and is configured to absorb the heat in response to desorption of the carbon dioxide. The adsorption unit is one of a plurality of adsorption units, and adjacent two adsorption units among the plurality of adsorption units contact with each other. When one of the adjacent two adsorption units adsorbs the carbon dioxide, another one of the adjacent two adsorption units desorbs the carbon dioxide.

Abstract: A carbon dioxide recovery system is configured to separate carbon dioxide from gas containing the carbon dioxide via an electrochemical reaction and includes an electrochemical cell including a working electrode and a counter electrode. The working electrode includes a CO2 adsorbent. The CO2 adsorbent is configured to, when a first voltage is applied between the working electrode and the counter electrode, take in electrons flowing from the counter electrode to the working electrode and adsorb the carbon dioxide by a Coulomb force of the electrons without bonding to the carbon dioxide by sharing an electron orbital with the carbon dioxide. The CO2 adsorbent is configured to, when a second voltage different from the first voltage is applied between the working electrode and the counter electrode, discharge the electrons from the working electrode to the counter electrode and desorb the carbon dioxide.

Abstract: Provided is a carbon dioxide recovery system that separates CO2 from a CO2-containing gas containing CO2 by an electrochemical reaction, and comprises an electrochemical cell comprising a working electrode containing a CO2 adsorbent, and a counter electrode. Application of a voltage between the working electrode and the counter electrode causes electrons to be supplied from the counter electrode to the working electrode, and enables the CO2 adsorbent to bind to CO2 as electrons are supplied. The CO2 adsorbent is a crystalline porous body, and has a molecular structure in which a functional group that exchanges electrons and binds to CO2 is regularly arranged.