A modular valve cartridge for a regenerative air dryer including a housing having a dry air passage and a desiccant canister having a desiccant bed. The modular valve cartridge includes a cylindrical body having an air passage extending axially there through between a first opening and second opening, a first end of the cylindrical body, including the first opening, to releasably couple to the housing to place the cartridge air passage in communication with the dry air passage via the first opening, and a second end of the cylindrical body, including the second opening, to releasably couple to the desiccant canister to place the cartridge air passage in communication with the desiccant bed via the second opening. A check valve is disposed within the cartridge air passage, the check valve biased to be in a normally closed position to close the cartridge air passage and to open the cartridge air passage in response to receiving a pressurized air via the second opening.

A packed bed for a heat exchanger may comprise a frame and a first fin layer disposed within the frame. A second fin layer may be disposed within the frame. A first perforated sheet may be disposed between the first fin layer and the second fin layer. A sorbent material may be disposed within a volume of at least one of the first fin layer or the second fin layer.

A sorbent product, including from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one base sorbent material; and from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one binder. The sorbent product may further include at least from about 0 wt % to about 99% wt %, based on the total weight of the sorbent product, of at least one additional additive. Methods for making same and methods and systems for controlling multiple pollutants are also included.

Disclosed is a visible light-activated photocatalytic coating composition comprising a visible light active photocatalytic material and an aqueous solvent.

Novel radioactive iodide molecular traps, in which one or more metal atoms are functionalized by coordinating to an amine containing two or more nitrogens, and methods of using the molecular traps to capture radioactive iodide.

A dehumidifying air handling unit for a heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a housing, a hollow desiccant drum configured to rotate within the housing, and a heat exchanger disposed within the hollow desiccant drum. The hollow desiccant drum includes channels that extend through a sidewall that surrounds an interior space. A desiccant is provided in the channels. The heat exchanger is configured to cool air flowing through the interior space of the hollow desiccant drum. A method of conditioning air includes rotating a hollow desiccant drum within a housing and directing the air to pass through the hollow desiccant drum. The air passing through the hollow desiccant drum includes cooling, with the heat exchanger, the air in an interior space of the hollow desiccant drum, and adsorbing, with a desiccant, moisture from the air cooled by the heat exchanger

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.

A capture vessel is provided that is configured to capture carbon dioxide (CO.sub.2) according to a thermal swing adsorption (TSA) process. The capture vessel includes capture media that are configured to adsorb CO.sub.2 from an exhaust gas during a CO.sub.2 capture stage to produce a first N.sub.2 gas that exits the capture vessel, receive a mixed stream of CO.sub.2 and water vapor during a wet regeneration stage, adsorb water from the mixed stream of CO.sub.2 and water vapor and release adsorbed CO.sub.2 during the wet regeneration stage to produce a CO.sub.2 stream, receive a first heated N.sub.2 gas and release adsorbed water due to evaporation caused by the first heated N.sub.2 gas during a drying stage, and receive a cooled gas during a cooling stage such that an absorption capacity of the capture media for CO.sub.2 capture is increased for a next CO.sub.2 capture stage.

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 system for reclaiming water from moisture-laden building exhaust exiting a building through a vent is described herein, where the system can include one or more porous metal organic frameworks (MOFs) disposed downstream of the building exhaust vent for adsorbing water from the exiting moisture-laden building exhaust. The adsorped water can be desorped from the MOF, either naturally or aided by cooling the MOF. The desorped water can optionally be collected or directed elsewhere for use or collection.