A portable gas separator assembly utilizing carbon molecular sieve absorbents or elements to separate a compressed air stream to extract nitrogen and oxygen molecules. Components of the assembly include at least two charging towers so that one tower can be charged with compressed gas while the other of the at least two towers is purged.

The present invention provides a refrigerating and freezing device. A first sealed space and a second sealed space are disposed in a storage space inside the refrigerating and freezing device. The refrigerating and freezing device is further provided with a nitrogen generation device, which comprises an adsorption device and an air compressor that supplies compressed air for the adsorption device. The adsorption device utilizes the compressed air to prepare nitrogen that is provided for the first sealed space and an oxygen-enriched gas that is provided for the second sealed space. The freshness preservation capability of the first sealed space is improved. The bioactivity of food in the second sealed space is guaranteed.

A gas inerting system employs a carbon dioxide separation unit to remove carbon dioxide and water from an oxygen depleted gas stream generated from a catalytic oxidation unit and subsequently provides a nitrogen rich inerting gas to a fuel tank and/or to a cargo hold. A method of producing an inert gas passes an oxygen depleted gas stream from a catalytic oxidation unit through a carbon dioxide separation unit and provides a nitrogen rich inerting gas for fuel tank inerting and/or cargo hold fire suppression.

The present invention relates to an adsorption process for xenon recovery from a cryogenic liquid or gas stream wherein a bed of adsorbent is contacted with a xenon-containing liquid or gas stream selectively adsorbing the xenon from said stream. The adsorption bed is operated to at least near full breakthrough with xenon to enable a deep rejection of other stream components, prior to regeneration using the temperature swing method. After the stripping step, the xenon adsorbent bed is drained to clear out the liquid residue left in the nonselective void space and the xenon molecules in those void spaces is recycled upstream to the ASU distillation column for increasing xenon recovery. The xenon adsorbent bed is optionally purged with oxygen, followed by purging with gaseous argon at cryogenic temperature (160 K) to displace the oxygen co-adsorbed on the AgX adsorbent due to higher selectivity of argon over oxygen on the AgX adsorbent. By the end of this step, the xenon adsorbent bed is filled with argon and xenon. Then the entire adsorbent bed is heated indirectly without utilizing any of the purge gas for direct heating. Operating the adsorption bed to near full breakthrough with xenon and displacing the adsorbed oxygen and other residues with argon, prior to regeneration, along with indirect heating of the bed, enables production of a high purity product 40 vol % xenon from the adsorption bed and further enables safely heating without any purge gas and ease for downstream product collection, even in cases where hydrocarbons are co-present in the feed stream.

An apparatus and method for reclaiming and filtering helium for reuse in analytical instruments. The method includes inputting the output gas stream from a gas chromatograph split vent and subjecting the input gas stream to a mini-particulate filter. The gas stream is also subjected to a molecular sieve filter and a finishing filter to isolate the helium carrier gas. The finishing filter removes trace contaminants that are not caught in the previous filters. The method utilizes a pump and controller to maintain a constant pressure, preferably between 80 and 100 psi, to avoid back-flow contamination and to ensure movement of the gas stream through the filters. Additionally, the use of a relief valve prevents back pressure from entering into the gas chromatograph. The filtered helium gas may be stored for future use or re-introduced directly to the input carrier gas stream of a gas chromatograph.

Systems and methods for generating inerting gas on vehicles are described. The systems include a proton exchange membrane (PEM) inerting system, a pure water supply system configured to provide pure water to the PEM inerting system, wherein the pure water supply system is in fluid communication with the PEM inerting system to replenish water lost during operation of the PEM inerting system, and a recapture loop configured to direct at least one of moisture and water from an output of the PEM inerting system back into the PEM inerting system, wherein the recapture loop includes a water treatment system.

Systems and methods for generating inerting gas on vehicles are described. The systems include a proton exchange membrane (PEM) inerting system and a pure water replenishment system configured to provide pure water to the PEM inerting system, wherein the pure water replenishment system is in fluid communication with the PEM inerting system to replenish water lost during operation of the PEM inerting system.

Redundant electrochemical systems and methods for vehicles are described. The systems include a first electrochemical device located at a first position on the vehicle wherein the first electrochemical device is configured to generate at least one of inert gas, oxygen, and electrical power and a second electrochemical device located at a second position on the vehicle wherein the second electrochemical device is configured to generate at least one of inert gas, oxygen, and electrical power. The first electrochemical device is configured to operate in a first mode during normal operation of the vehicle and a second mode when the second electrochemical device fails, wherein in the second mode, the first electrochemical device provides the at least one of inert gas, oxygen, and electrical power for at least one vehicle critical system of the vehicle.

A gas production device and a gas production system capable of efficiently manufacturing a produced gas containing carbon monoxide from a raw material gas containing carbon dioxide are provided. The gas production device 1 is an apparatus that manufactures a produced gas containing carbon monoxide by bringing a raw material gas containing carbon dioxide into contact with a reductant that reduces the carbon dioxide. The device 1 includes a connecting portion 2 that supplies the raw material gas, a reducing gas supply section 3 that supplies a reducing gas for reducing the reducing agent oxidized by contact with the carbon dioxide, a reaction section 4 that includes a plurality of reactors 4a and 4b to which the connecting portion 2 and the reducing gas supply section 3 are respectively connected, and a reducing agent arranged in the reactors 4a and 4b, and that is capable of switching between the raw material gas and the reducing gas to be supplied to the respective reactors 4a and 4b, and a concentration adjustment section 5 that is provided between the connecting portion 2 and the reactors 4a and 4b, and that adjusts a concentration of oxygen contained in the raw material gas. In the concentration adjustment section 5, the concentration of the oxygen contained in the raw material gas is adjusted to less than 1% by volume.

Device and method for purifying a gas mixture to produce a concentrated gas, notably neon, starting from a mixture comprising neon, said device including, in a cold box housing a cryogenic purification circuit comprising, in series, at least one unit for purifying the mixture by cryogenic adsorption at a temperature between 65K and 100K and notably 65K, then a unit for cooling the mixture to a temperature between 25 and 65 K and then a unit for cryogenic distillation of the mixture to produce the concentrated liquid at the outlet of the cryogenic distillation unit, characterized in that the unit for cooling the mixture to a temperature between 25 and 65 K comprises at least one cryocooler that extracts thermal power from the mixture via a heat exchanger.