Separation unit (1) for separating at least one gaseous component from a gas mixture, or arrangement of such separation units, wherein it comprises at least one circumferential wall element(s) (5), said circumferential wall element(s) defining an upstream opening (31) and an opposed downstream opening (32) of at least one cavity (3) containing at least one gas adsorption structure (4) for adsorbing said gaseous component under ambient pressure and/or temperature conditions, or an array of at least two such cavities (3), wherein the separation unit (1) comprises a pair of opposing sliding doors (12) for sealing the openings of a cavity (3) and preferably allowing for evacuating a cavity (3), and wherein the pair of opposing sliding doors (12) can be shifted in a direction essentially parallel to the plane of the respective sliding door (12) and to allow for flow through of gas mixture through the gas adsorption structure (4).

The present disclosure describes a system and method for maintaining oxygen purity in portable oxygen concentrators, even with asymmetric generation of oxygen enriched gas volumes from different sieve beds of the concentration system. The present system and method compensate for asymmetric oxygen enriched gas generation using asymmetric delivery of purge volumes. Purge valves are used to deliver the asymmetric purge gas volumes, enables the system to maintain oxygen purity without additional power consumption, even when a portable oxygen concentrator does not include a product tank. The present system and method are configured such that asymmetry in enriched oxygen generation can be monitored and the asymmetric purge gas compensation can be applied independently from other control mechanisms of a portable oxygen concentrator.

The disclosure discloses an energy-saving system for purifying and recycling oxygen from high-temperature oxygen-enriched flue gas, including a water washing mechanism for introducing high-temperature oxygen-enriched flue gas, a compressor set connected with the water washing system through a pipeline, a compressor outlet heat exchanger connected with the compressor set through a pipeline, a gas-liquid separation tank connected with the compressor outlet heat exchanger through a pipeline, a temperature swing adsorption isobaric drying mechanism and a pressure swing adsorption purification mechanism connected with the gas-liquid separation tank through pipelines, a dedusting and filtering mechanism for introducing gas treated by the temperature swing adsorption isobaric drying mechanism and the pressure swing adsorption purification mechanism, and a cooling mechanism for cooling the water washing mechanism and the compressor outlet heat exchanger.

A temperature swing adsorption process for removing a target component from a gaseous mixture containing water and at least one side component, said process comprising: (a) at least one adsorption step, providing a target component-loaded adsorbent and at least one waste stream depleted of the target component; (b) a desorption step, comprising heating of the loaded adsorbent to a desorption temperature and providing a first output stream containing the desorbed target component; (c) a conditioning step; (d) at least one target component-releasing releasing step bringing the solid adsorbent to a temperature lower than said desorption temperature and providing at least one second output stream containing an amount of the target component and containing water; (e) separating water from said second output stream(s) and (f) subjecting the so obtained water-depleted stream(s) to said adsorption step or to at least one of said adsorption steps.

Described herein are various embodiments of an oxygen concentrator system. In some embodiments, oxygen concentrator system includes one or more components that improve the useful lifetime of gas separation adsorbents.

A hydrogen gas supply apparatus includes a compressor configured to compress hydrogen gas and supply the compressed hydrogen gas toward a pressure accumulator which accumulates the hydrogen gas, a first adsorption column disposed between the discharge port of the compressor and the pressure accumulator and configured to include the first adsorbent for adsorbing impurities in the hydrogen gas discharged from the compressor, a first valve disposed between the discharge port of the compressor and the gas inlet port of the first adsorption column, a second valve disposed between the gas outlet port of the first adsorption column and the pressure accumulator, a return pipe configured to branch from between the first valve and the gas inlet port of the adsorption column and connect to the suction side of the compressor, and a second adsorption column disposed in the middle of the return pipe.

The present disclosure relates to a purge system for a vapor compression system, where the purge system includes an emission canister configured to receive a gas flow. The gas flow includes a mixture of non-condensable gases and refrigerant of the vapor compression system. An adsorbent material is disposed within the emission canister and configured to adsorb the refrigerant and enable the non-condensable gases to flow toward an exhaust of the emission canister, where the adsorbent material is a silica gel.

A water recovery system including a first fluid stream inlet providing for the flow of a first fluid stream, such as a humidified inlet gas, into the system and a second fluid stream inlet providing for the flow of a second fluid stream, such as a gas having a temperature greater than the humidified inlet gas, into the system. At least one contactor is in fluid communication with the first fluid stream inlet and the second fluid stream inlet. The at least one contactor defining therein a first fluidically-isolated, sorbent-integrated, fluid domain for flow of the first fluid stream and water adsorption, a second fluidically-isolated fluid domain for flow of the second fluid stream wherein the second fluidically-isolated fluid domain is in thermal communication with the first fluidically-isolated, sorbent-integrated, fluid domain and a third fluidically-isolated fluid domain for capture of a condensate and recycling of latent heat of condensation back to the first fluidically-isolated, sorbent-integrated, fluid domain.

Disclosed are techniques such as roll to roll processing to produce membrane valves in microelectromechanical systems that are integrated with micro-pumps that include a pump body having compartmentalized pump chambers. One application of this technology is as a valve assembly for a gas concentrator that includes a first micro pump for feeding an input gas stream, a second micro pump to supplying a vacuum and at least one sieve bed having a zeolite. The gas concentrator uses the valve assembly for controlling entry of gas from the first micro pump into the sieve bed and the second micro pump to vent.

The process of the present invention provides high recovery and low capital cost giving it an economic advantage over previously known purification processes. The present process has particular applicability to the purification of synthesis gases comprising at least hydrogen (H.sub.2), carbon monoxide (CO), methane (CH.sub.4), CO.sub.2, and H.sub.2O to obtain a gas stream including at least H.sub.2, CO, and CH.sub.4, that is substantially free of H.sub.2O and CO.sub.2. The process also has applicability to the purification of natural gases inclusive of at least CH.sub.4, N.sub.2, CO.sub.2, and H.sub.2O to produce a gas stream including at least CH.sub.4 and N.sub.2, but which is substantially free of H.sub.2O and CO.sub.2.