A capture vessel is provided that is configured to capture carbon dioxide (CO.sub.2) according to a thermal swing adsorption (TSA) process. The TSA process includes a cyclical sequence including at least a CO.sub.2 capture stage, a regeneration stage, and a cooling stage. The capture vessel includes capture media arranged inside the capture vessel, and an inter-exchanger arranged inside the capture vessel and thermally coupled to the capture media. The capture media are configured to adsorb CO.sub.2 from an exhaust gas during the CO.sub.2 capture stage to produce a nitrogen (N.sub.2) gas that exits the capture vessel. The inter-exchanger is configured to, during the CO.sub.2 capture stage, circulate a coolant within the capture vessel to regulate a temperature of the capture media.

A method and plant for capturing CO.sub.2 from a CO.sub.2 containing exhaust gas (1), where the exhaust gas is compressed (10) and thereafter cooled (13, 15, 22) before the exhaust gas is introduced into an absorber (30), where the exhaust gas is brought in counter-current flow with an aqueous CO.sub.2 absorbent solution (49), to give a lean exhaust gas (31) that is withdrawn from the absorber (30), reheated 22, 13) against incoming compressed exhaust gas, and thereafter expanded (34) and released into the atmosphere (4), where the aqueous CO.sub.2 absorbent solution is an aqueous potassium carbonate solution, and that the steam and CO.sub.2 withdrawn from the regenerator (40) is cooled in a direct contact cooler (61) by counter-current flow of cooling water (62), to generate a gaseous flow (70) of cooled CO.sub.2 and steam that is withdrawn for compression and drying of the CO.sub.2, and a liquid flow (64) of cooling water and condensed steam that is withdrawn and flashed (80), to give a cooled liquid phase (84) that is recycled as cooling water for the direct contact cooler (61) for the withdrawn CO.sub.2 and steam, and a gaseous phase (81) that is compressed (82) and thus heated, and introduced into the regenerator (40) as stripping steam (83).

A composite adsorbent for adsorbing water includes a silica-cage having plural pores and internal channels that fluidly connect the plural pores, at least one interior chamber having an average diameter larger than an average diameter of the plural pores, wherein the at least one interior chamber is a result of a collapse of at least one pore of the plural pores and one channel of the internal channels, and a salt provided within the plural pores, the internal channels and the at least one interior chamber.

Generally, an atmospheric water harvesting system useful in harvesting water from surrounding air. Specifically, a water harvester including a secondary heat exchanger operable in a first mode of the water harvester to absorb heat from the ambient environment to reduce the sensible heat penalty associated with increasing temperature to initiate desorption of water from a water capture material and in particular embodiments operable in a second mode of the water harvester to transfer heat from the desorbed water to the ambient environment.

In a process for the scrubbing of a gas stream, liquid (7) from the scrubbing tower (K) is vaporized (E1) in order to cool ambient air (19) which is subsequently used to cool water (25), producing cooling water (27) to be used upstream or downstream of the scrubbing process.

An air purifier apparatus, comprising: a housing comprising an air intake opening to an external environment outside the housing; a plant pot disposed downstream of the air intake, configured to hold soil, and being perforated so as to enable contact between at least some air outside the plant pot and at least some of the soil inside the plant pot; an air purification filter disposed downstream of the plant pot; a fan disposed downstream of the air purification filter; an air outlet disposed downstream of the fan and located in a first compartment of the housing; a dehumidifier disposed in a second compartment of the housing separate from the first compartment and configured to extract water from air interacting with the dehumidifier, the second compartment having an air exchange perforation opening to the external environment; a watering system, configured to circulate water located inside the housing to the plant pot.

A method and plant for capturing CO.sub.2 from a CO.sub.2 containing exhaust gas (1), where the exhaust gas is compressed (10) and thereafter cooled (13, 15, 22) before the exhaust gas is introduced into an absorber (30), where the exhaust gas is brought in counter-current flow with an aqueous CO.sub.2 absorbent solution (49), to give a lean exhaust gas (31) that is withdrawn from the absorber (30), reheated 22, 13) against incoming compressed exhaust gas, and thereafter expanded (34) and released into the atmosphere (4), where the aqueous CO.sub.2 absorbent solution is an aqueous potassium carbonate solution, and that the steam and CO.sub.2 withdrawn from the regenerator (40) is cooled in a direct contact cooler (61) by counter-current flow of cooling water (62), to generate a gaseous flow (70) of cooled CO.sub.2 and steam that is withdrawn for compression and drying of the CO.sub.2, and a liquid flow (64) of cooling water and condensed steam that is withdrawn and flashed (80), to give a cooled liquid phase (84) that is recycled as cooling water for the direct contact cooler (61) for the withdrawn CO.sub.2 and steam, and a gaseous phase (81) that is compressed (82) and thus heated, and introduced into the regenerator (40) as stripping steam (83).

A method for capturing CO.sub.2 from a flue gas from a district heating plant fired on a carbonaceous fuel, where the flue gas is compressed and thereafter cooled before the flue gas is introduced into an absorber (16), where the flue gas is brought in countercurrent flow to an aqueous CO.sub.2 absorbent solution introduced into the absorber (16), to give a lean flue gas that is withdrawn from the absorber (16), reheated against incoming compressed flue gas, and thereafter expanded and released into the atmosphere, where the rich absorbent is introduced into a regenerator (30) and stripped to release CO.sub.2, withdrawing the lean absorbent from the regenerator (30) and introduction of the lean absorbent into the absorber (16), where the flow of lean absorbent is split in two, a first flow which is introduced at the top of an absorbent packing (17) in the absorber (16), and a second flow which is cooled against a heat fluid received from the district heating plant an returned thereto, and where the thus cooled absorbent is introduced at the top of a cooler packing (21) at the top of the absorber for cooling and drying of the lean flue gas before being reheated against incoming compressed flue gas, and thereafter expanded and released into the surrounding. and a plant for performing the method are described.

An energy-efficient method of removing carbon dioxide, hydrogen sulfide, and other acid gases from a stream of flue gases. The flue stream is contacted with a predetermined sorbent system to remove acid gases from the flue stream. The acid gas-rich sorbent is then heated to desorb the acid gas for capture and regenerate the sorbent. Heat exchangers and heat pumps are used to reduce utility steam and/or cooling water consumption.

A carbon capture system for carbon dioxide (CO.sub.2)-thermal swing adsorption (TSA) includes an engine configured to produce a hot exhaust; a plurality of capture vessels that are configured to be respectively cycled through a plurality of stages of a CO.sub.2-TSA process; an N.sub.2 heat exchanger configured to receive the hot exhaust; and an N.sub.2 turbocharger coupled to the N.sub.2 heat exchanger. The N.sub.2 turbocharger is configured to receive N.sub.2 gas from a first capture vessel, heat the N.sub.2 gas via the N.sub.2 heat exchanger through a thermal exchange with the hot exhaust to produce a heated N.sub.2 gas, and provide the heated N.sub.2 gas to a second capture vessel in order to dry capture media of the second capture vessel.