The present invention relates to the CO.sub.2 and O.sub.2 remover. The CO.sub.2 and O.sub.2 remover comprises 65 to 85 weight percent (wt. %) of a nickel oxide (NiO), 5 to 20 wt. % of a magnesium oxide (MgO), wherein the weight ratio of the nickel oxide and the magnesium oxide (NiO/MgO) is 4 to 11, and wherein the wt. % is based on the weight of the CO.sub.2 and O.sub.2 remover.

A method is provided for operating a controlled atmosphere (CA) system to regulate the atmosphere in a cargo storage space. The CA system comprises a gas exchange module operable to vary the level of a component gas in the cargo storage space, a control module to control operation of the gas exchange module, and at least one of an oxygen sensor and a carbon dioxide sensor, each being operable to measure a parameter indicative of a level of oxygen or carbon dioxide respectively in the cargo storage space. The method comprises: the control module determining a respiration parameter value indicative of the rate of change of oxygen level and/or the rate of change of carbon dioxide level in the cargo storage space due to respiration of goods in the cargo storage space; and the control module controlling operation of the gas exchange module based on the determined respiration parameter value to target an oxygen level setpoint and/or a carbon dioxide level setpoint.

The present invention aims to improve the separation selectivity for light gases such as hydrogen and helium. The gas separation membrane according to the present invention includes a porous support layer and a separation functional layer containing a cross-linked polyamide and laid on the porous support layer, wherein: the separation functional layer has a protuberance structure containing a plurality of protrusions and recesses; randomly selected 20 of the protrusions on the surface of the separation functional layer indented under a load of 3 nN and observed in pure water at 25° C. by atomic force microscopy give an average deformation of 5.0 nm or more and 10.0 nm or less; and they give a standard deviation of the deformation of 5.0 nm or less.

An air separation module includes a canister extending between a first end and an opposite second end, a separator fixed within the canister to separate a compressed air flow into an oxygen-enriched air flow fraction and an oxygen-depleted air flow fraction, and a one-piece cap. The one-piece cap is connected to the first end of the canister and has a filter module mount portion on a side of the one-piece cap opposite the separator to support a filter module with the air separation module. Nitrogen generation systems and methods of making air separation modules are also described.

Sorptive gas separators can employ contactors having various sorbents blended together. The various sorbents used to make a blended sorbent contactor can be selected for their various physical and chemical properties, which will allow operators to customize formulations and structural configurations to obtain optimum performance of sorptive gas separators using blended sorbents.

Disclosed are a CHA zeolite membrane and a method of preparing the same, and more particularly, a CHA zeolite membrane having high capacity to separate CO.sub.2/N.sub.2 and CO.sub.2/CH.sub.4 even under wet conditions using a membrane produced using a synthetic precursor having a controlled ratio of Si and Al, a method of preparing the same, and a method of capturing and removing carbon dioxide using the membrane.

A hazardous gas purification device with a built-in purification system is disclosed. The disclosed present invention is characterized in that it comprises a body case provided with an intake port for sucking hazardous gas on the upper side, provided with an exhaust port for discharging purified air to the outside on the lower side, and provided with an accommodating part provided between the intake port and the exhaust port on the inside; a pre-filter for filtering out large particles of dust and foreign substances contained in the hazardous gas introduced through the intake port; and a modular purification system, in a state of being installed in the accommodating part, for sterilizing viruses while filtering hazardous substances and fine particulate foreign substances contained in the hazardous gas introduced through the intake port, wherein the purification system consists of a three-dimensional filter for three-dimensionally filtering volatile organic compounds contained in the hazardous gas passed through the pre-filter from four directions; a pressure-feed fan, in a state of being disposed below the three-dimensional filter, for sucking hazardous gas through the intake port and forcibly discharging purified air through the exhaust port; a UV lamp disposed below the pressure-feed fan and for irradiating the pressure-feed fan and the hazardous gas with ultraviolet rays to sterilize harmful viruses; a HEPA filter disposed below the UV lamp and for filtering fine particles in the hazardous gas that is not filtered by the pre-filter; and a flat plate filter disposed below the HEPA filter and for filtering the remaining amount of volatile organic compounds that are not filtered by the three-dimensional filter.

The disclosure provides a method for producing a gas separation article, said gas separation article comprising: a gas separation membrane, optionally a support, and optionally an additional support said method comprising the steps of: a) providing a matrix comprising: a matrix material having a viscosity from 1 cP to 40000 cP, particles, said particles being free from functionalized carbon nanotubes, and optionally a solvent, b) contacting the matrix of step a) with a support comprising at least one side, said at least one side facing said matrix, thereby forming (i) a matrix side in contact with the support and (ii) a matrix side opposite the side in contact with the support, c) optionally contacting the matrix side opposite the side contacting the support with an additional support, d) subjecting said matrix being in contact with said support to one or more electric fields whereby the particles form particle groups in a plurality of substantially parallel planes, said particle groups in each of said plurality of substantially parallel planes being aligned substantially parallel with the one or more electric fields, e) fixating the matrix material so as to fixate the particle groups thereby forming a gas separation membrane, and f) optionally removing the support and/or the additional support.

The disclosure also provides a gas separation membrane obtainable by the aforementioned method as well as use thereof for separation of gases in a gas mixture.

A method of purifying air via a pre-purification unit (PPU) of an air separation unit (ASU) system having a pre-PPU chiller that is upstream of the PPU to cool compressed air before the compressed air is fed to the PPU can include passing air through an adsorber of the PPU to pass the air through a bed of adsorbent material within a vessel of the adsorber. In response to the pre-PPU chiller being determined to have an issue resulting in the pre-PPU chiller being tripped or requiring the pre-PPU chiller to be taken off-line, continuing to operate the ASU system at a full capacity even though nitrous oxide (N2O) within the air output from the PPU exceeds a first pre-selected threshold and is below a second pre-selected threshold associated with carbon dioxide (CO2) breakthrough. An ASU and a PPU can be designed to implement an embodiment of the method.

Method and plant for generating a synthesis gas which consists mainly of carbon monoxide and hydrogen and has been freed of acid gases, proceeding from a hydrocarbonaceous fuel, and air and steam, wherein low-temperature fractionation separates air into an oxygen stream, a tail gas stream and a nitrogen stream, wherein the tail gas stream and the nitrogen stream are at ambient temperature and the nitrogen stream is at elevated pressure, wherein the hydrocarbonaceous fuel, having been mixed with the oxygen stream and steam at elevated temperature and elevated pressure, is converted to a synthesis gas by a method known to those skilled in the art, and wherein acid gas is subsequently separated therefrom by low-temperature absorption in an absorption column, wherein the nitrogen stream generated in the fractionation of air is passed through and simultaneously cooled in an expansion turbine and then used to cool either the absorbent or the coolant circulating in the coolant circuit of the compression refrigeration plant.