A gas separation method in which a rare as a first introduced gas and an impurity gas as a second introduced gas, are introduced into a raw material gas. Each of the flow rates of the first and second introduced gases is controlled based on the flow rates of the rare gas and impurity gas in the discharged gas from a rare gas using facility. A gas separation device includes an introduction pipe for introducing rare gas in a separation gas container into a raw material gas, an introduction pipe for introducing impurity gases in the separation gas container into the raw material gas, a flow meter provided in a supply pipe for supplying a discharged gas of a rare gas using facility, and an arithmetic device electrically connected to each of the flow meter the flow rate controller, and the flow rate controller.

A perovskite oxygen carrier having the formula Sr.sub.1-xCa.sub.xFe.sub.1-yNi.sub.yO.sub.3, where 0.05<x<0.30 and 0.001<y<0.125 and a method of using the perovskite carrier to carry oxygen. A mesoporous perovskite oxygen carrier having the formula Sr.sub.1-xCa.sub.xFeO.sub.3, where 0.01<x<0.40 and methods for making and using the mesoporous perovskite oxygen carrier.

The invention relates to a method and system for improving PSA/VPSA plant energy efficiency during times of reduced production demand and capital efficiency through optimizing feed, vacuum, and centrifugal product compressors to achieve lower energy consumption and lower unit gas product production cost. More specifically, the present invention relates to a new energy efficient PSA/VPSA turn down process and system which employs high speed direct drive centrifugal product compressor to achieve desired production. Significant lower energy consumption can be achieved by employing lower flow, and lower adsorption top pressure in the lower production range.

An adsorption process is provided to remove oxygen from a hydrogen stream through the use of a copper material in combination with layers of adsorbent to remove water and nitrogen from a hydrogen stream. This process is particularly useful for purification of hydrogen product gas from water electrolyzers with the hydrogen product gas having greater than 99.9 mol % purity.

A device for drying compressed gas with an inlet for compressed gas to be dried originating from a compressor and an outlet for dried compressed gas, where this device includes a number of vessels that are filled with a regeneratable drying agent and a controllable valve system that connects the aforementioned inlet and outlet to the aforementioned vessels, where the device includes at least three vessels, where the aforementioned valve system is such that at least one vessel is always being regenerated, while the other vessels dry the compressed gas, where due to the control of the valve system the vessels are each successively regenerated in turn.

An oxygen generation device having a compressed air supply device, air cooling coil, a fan, pneumatic valve system, a housing, at least one media insert, an on-off switch, a printed circuit board, and a touch screen. The pneumatic valve system includes an air inlet port, a first air outlet port connected to the inlet of the first media insert, a second air outlet port connected to the inlet of the second media insert. The air inlet port receives compressed air from the compressed air supply device and alternatingly provides the compressed air to one of the first media insert and the second media insert. The lower housing includes check valve ball moveable between the first position and the second position and alternatingly controlling a flow of compressed air through the first media insert and the second media insert.

The invention includes methods for removing higher acetylenes from a gaseous stream that includes a hydrogen fraction and a non-hydrogen fraction, wherein the gaseous stream includes less than about 4% in total of diacetylene and vinylacetylene, where the method includes the following steps: (i) an adsorption that passes the gaseous stream at a preselected superficial linear gas velocity across an adsorption bed supported within an enclosure, the adsorption bed containing a crystalline porous ceramic adsorbent to adsorb the higher acetylenes onto the adsorbent, thereby producing a saturated adsorption bed and a purified gaseous stream including less than about 25 ppm of diacetylene that regenerates the saturated adsorbent bed by passing a regeneration gas across the saturated adsorption bed to desorb the higher acetylenes retained thereupon, thereby producing a regenerated adsorbent bed and a contaminated gas stream bearing the higher acetylenes; and (iii) a purging step that removes the contaminated gas stream from the enclosure. The invention also includes systems for removing diacetylene and vinylacetylene from a hydrogen-dominant acetylene-hydrogen gaseous stream.

A system for pressure swing adsorption including: a plurality of beds each performing at least one of an adsorbing process, a pressure equalizing process, a vacuum process, or a pressurizing process; a supply valve provided in each of the beds and connected to a mixed gas supply unit to supply a mixed gas to the bed; a discharge valve provided in each of the beds and connected to a hydrogen gas discharge unit to discharge hydrogen generated in the bed; a vacuum valve provided in each of the beds and connected to a vacuum pump so as to be open to the vacuum pump during the vacuum process of the bed; and a control unit that controls the supply valve, the discharge valve, and the vacuum valve to allow each of the beds to perform the adsorbing process, the pressure equalizing process, the vacuum process, or the pressurizing process.

A carbon capture system can include a plurality of CO.sub.2 thermal swing adsorption (TSA) beds. The plurality of CO.sub.2 TSA beds can include at least a first TSA bed, a second TSA bed, and a third TSA bed configured to capture CO.sub.2 within a capture temperature range and to regenerate the captured CO.sub.2 at a regeneration temperature range above the capture temperature range. The carbon capture system can include a plurality of valves and associated flow paths configured to allow switching operational modes of each of the first, second, and third TSA beds.

A modular, multi-crew life support system and a method of assembling the system involve a fan to draw in ambient air. The system includes one or more assemblies that produce conditioned air from the ambient air, and a housing to support an oxygen source. The system also includes a port configured as an inlet from the oxygen source to augment the conditioned air, and a duct to disperse a result of augmenting the conditioned air as output air to support two or more occupants of an enclosure.