A method and system for carbon capture through a voltage-swing is provided. The present invention may include capturing carbon dioxide from a gas mixture through physisorption by applying a positive electrical charge to a sorbent to increase the sorbent's selectivity and adsorption and liberating the carbon dioxide from the sorbent by removing the positive electrical charge from the sorbent and applying a desorption method to the sorbent.

Provided is a management apparatus 30 including: a concentration acquisition unit 31 configured to acquire a first concentration which is a concentration of an acidic gas when a gas containing the acidic gas is introduced into an acidic gas adsorber that adsorbs the acidic gas and a second concentration which is a concentration of the acidic gas after being processed in the acidic gas adsorber; a captured amount calculation unit 32 configured to calculate a captured amount of the acidic gas adsorbed by the acidic gas adsorber based on the first concentration and the second concentration; and a management unit 33 configured to conduct management to replace the acidic gas adsorber based on a regeneration timing of the acidic gas adsorber determined based on the calculated captured amount. The present invention thereby provides a management apparatus etc. that facilitate the management of an acidic gas adsorber and save costs.

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 CO.sub.2 adsorbent. The CO.sub.2 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 CO.sub.2 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.

A device for passive collection of atmospheric carbon dioxide is disclosed, including a vessel having an opening and a sorbent regeneration system. The device also includes a helical sorbent structure rotatably coupled to the vessel. The sorbent structure has a helical framework coupled to a sorbent material. The sorbent structure is movable between collection and release configurations. The collection configuration includes the sorbent structure extending upward from the vessel to expose the sorbent structure to an airflow and allow the sorbent material to capture atmospheric CO.sub.2. The sorbent structure is free to rotate on an axis. The sorbent material is constrained to a helix rotating about and propagating along the axis. The release configuration includes a lid covering the opening, and the sorbent material being sufficiently enclosed inside the vessel that the regeneration system may operate to release captured CO.sub.2 from the sorbent material and form an enriched gas.

A compound represented by Formula (1): each of L.sup.1 and L.sup.2 independently represents an alkyl group having from 1 to 20 carbon atoms, an alkoxy group having from 1 to 20 carbon atoms, NH.sub.2, NHR.sup.3, NR.sup.3R.sup.4, an ester group, a carboxy group, an amide group, a cyano group, a nitro group, a halogen atom, an acyl group, CF.sub.3, O(CH.sub.2).sub.lOCH.sub.3, a carbamate group, or an aryl group. l represents 1 or 2. Each of R.sup.1 and R.sup.2 independently represents a divalent hydrocarbon group having from 1 to 10 carbon atoms, at least one hydrogen atom of the divalent hydrocarbon group is optionally substituted with an alkyl group, an aryl group, an ester group, a carboxy group, an amide group, a cyano group, a nitro group, a halogen atom, an acyl group, CF.sub.3, O(CH.sub.2).sub.lOCH.sub.3, a carbamate group, or an alkoxy group, each of R.sup.3 and R.sup.4 independently represents an alkyl group, an aryl group, an acyl group, an ester group, an alkylsulfonyl group, or an arylsulfonyl group, each of R.sup.5 and R.sup.6 independently represents a hydrogen atom, an alkyl group having from 1 to 20 carbon atoms, or an aryl group, and n+m1.

Disclosed is an energy-saving system and method for direct air capture with precise ion control. The system includes an air conveying device, an air distribution device and a CO.sub.2 adsorption device with a moisture swing adsorbent with high CO.sub.2 adsorption capacity, where the air conveying device, the air distribution device and the CO.sub.2 adsorption device are connected in sequence, and the CO.sub.2 adsorption device is provided with a spray desorption device; a valence-state ion sieving device; a pH swing regeneration device; and a CO.sub.2 regeneration device. In accordance with the energy-saving system provided by the present disclosure, ultra-low concentration of CO.sub.2 in the air can be enriched to the concentration of 95% step by step for industrial application or biological application at room temperature and pressure by consuming the electricity which cannot be connected to a power grid.

A method of separating carbon dioxide (CO.sub.2) from air, where the method includes: feeding air into a cooler to generate cooled air, the cooled air including nitrogen (N.sub.2), oxygen (O.sub.2), water (H.sub.2O), and CO.sub.2; feeding the cooled air to a first adsorption column including a first zeolite adsorbent to selectively capture the H.sub.2O from the cooled air, generating dried cooled air; and feeding the dried cooled air to a second adsorption column including a second zeolite adsorbent to selectively capture the CO.sub.2 from the dried cooled air, generating a tail gas, wherein the second zeolite adsorbent includes a Linde Type A (LTA) aluminosilicate zeolite that is hydrolyzed and at least partially collapsed.

Metal organic framework compositions and methods for acid gas capture from elevated temperature (70 to 370 C.) gas streams like those found in steel and cement manufacturing processes that require energy-intensive cooling prior to feasible CO.sub.2 capture are disclosed. The metal-hydride frameworks ZnH-MFU-4l (Zn.sub.5H.sub.4(btdd).sub.3; H.sub.2btdd=bis(1H-1,2,3-triazolo[4,5-b],[4,5-i])dibenzo[1,4]dioxin)) and ZnH-CFA-1 (Zn.sub.5H.sub.4(bibta).sub.3, where ZnH-CFA-1=Zn.sub.5H.sub.4(bibta).sub.3; H.sub.2(bibta)=1H,1H-5,5-bibenzo[d][1,2,3]triazole demonstrate steep CO.sub.2 uptake between 150 C. and 300 C. at low partial pressures, indicating strong sorbent-interactions with the framework through a metal-ligand insertion process.

A conveyor motivated water desorber includes a hollow prism defining a desorption channel and includes an ingress port at a proximal end of the prism, and an egress port at a distal end of the prism, a conveyor motivating movement of multiple sorbent objects through the desorption channel, an injection port and an ejection port fixed at opposite ends of the prism with a desorption zone defined therebetween within the desorption channel, a water recirculation loop recirculating water injected into the desorption channel through the injection port and exiting the channel at the ejection port with a temperature increasing from the injection port into the desorption zone and decreasing from the desorption zone to the ejection port, and a gas takeoff port fixed to the prism and coupling a gas storage reservoir to the desorption channel.

The present disclosure is directed to metal ion-containing zeolitic compositions having MOR topology that are useful for scavenging CO.sub.2 from low-CO.sub.2-content feed streams, including air, and method of making and using the same.