A separation membrane structure comprising a porous support, a first glass seal, and a separation membrane. The porous support includes through-holes which connect a first end surface and a second end surface. The first glass seal is configured to cover the first end surface. The separation membrane is formed on an inner surface of the through-holes. The first glass seal has a first seal body part and a first extension part. The first seal body part is disposed on the first end surface. The first extension part is connected to the first seal body part and disposed on the inner surface of the through-holes. The separation membrane has a first connection part connected to the first extension part of the first glass seal. A first thickness of the first connection part is less than or equal to 10 microns, and less than or equal to 3.2 times a center thickness at a longitudinal center of the separation membrane.

An acidic gas separation module 10, which improves gas separation efficiency and reduces pressure loss, includes: a permeating gas collecting tube 12 having tube walls in which through holes 12A are formed; a layered body 14 that has at least an acidic gas separation layer 32 and that is wound on the permeating gas collecting tube 12; and telescope prevention plates 18 (a gas supply side 18A and a gas discharge side 18B) provided at both end faces in an axial direction of the wound layered body 14, wherein the ratio (D2/D1) of the open area ratio D2 of the telescope prevention plate on the gas discharge side 18B relative to the open area ratio D1 of the telescope prevention plate on the gas supply side 18A is from 0.5 to 0.9. An acidic gas separation device includes the acidic gas separation module 10.

A structure of assembly grasp for palladium-alloy tubes and the manufacturing method thereof are described. The structure of assembly grasp for palladium-alloy tubes includes a grasp with a plurality of holes, a plurality of palladium-alloy tubes inserted into the plurality of holes, and an intermetallic compound layer between the palladium-alloy tubes and the inner sidewalls of the plurality of holes.

A membrane capsule for biological and chemical separations comprising a cassette comprising an upper surface and a lower surface adjoined by a cassette sidewall, an inlet and an outlet located on the upper and lower surfaces of the cassette, tubes fluidly connected to the inlet and the outlet, holes or slots in the tubes to facilitate separation, and a membrane wrapped, pleated, and/or spiral wound around each of the tubes. Methods of separation comprising flowing fluid flow through the inlet of the membrane capsule, allowing the fluid to permeate through the holes or slots of the tubes, separating biological and/or non-biological substances, collecting the fluid within a reservoir, and draining fluid from the reservoir.

A system and method for producing hydrogen, including providing hydrocarbon and steam into a vessel to a region external to a tubular membrane in the vessel. The method includes steam reforming the hydrocarbon in the vessel via reforming catalyst to generate hydrogen and carbon dioxide. The method includes diffusing the hydrogen through the tubular membrane into a bore of the tubular membrane, wherein the tubular membrane is hydrogen selective.

Separation of a gas mixture comprising first and second gases may be improved using two cascaded stages of gas separation membrane modules that includes the additional techniques of cooling the feed gas stream that is fed to the feed stage and using a portion of the feed stage retentate as a sweep gas on the feed stage.

An air separation module includes a canister, a separator, and a perforated plate. The canister has a plenum portion connecting an inlet portion to an outlet portion, extends circumferentially about a canister axis, and has a plenum diameter that is larger than a canister diameter defined by the inlet and outlet portion of the canister. The separator is arranged within the canister and axially spans the plenum portion to separate air received at the inlet end portion into nitrogen-enriched and oxygen-enriched air flows. The perforated plate is seated within the plenum portion, fluidly couples the separator to an oxygen-enriched air outlet port defined by the plenum portion, and has a snap-fit major dimension smaller than the plenum diameter to radially support a portion of the separator axially spanning the plenum portion of the canister. Nitrogen generation systems and methods of making air separation modules are also described.

A gas separation membrane for selective separation of hydrogen and helium from gas mixtures containing carbon dioxide includes a porous support layer, an aromatic polyamide layer on the porous support layer, and a coating including a glassy polymer formed on the aromatic polyamide layer. A glass transition temperature of the glassy polymer is greater than 50° C. The gas separation membrane may be formed by contacting a solution including the glassy polymer with an aromatic polyamide layer of a composite membrane and drying the solution to form a coating of the glassy polymer on the aromatic polyamide layer. Separating hydrogen or helium from a gas stream including carbon dioxide includes contacting a gas feed stream including carbon dioxide with the gas separation membrane to yield a permeate stream having a concentration of helium or hydrogen that exceeds the concentration of helium or hydrogen, respectively, in the gas feed stream.

According to one embodiment, a gas recovering apparatus includes a casing and a tube. The casing is provided with an inlet through which a gas flows in, a first outlet for discharging a first gas containing a gas to be recovered of the gas, and a second outlet for discharging a second gas other than the first gas of the gas. The casing is evacuated via the first outlet. The tube is provided in the casing from the inlet to the second outlet, and has a high permeability to the first gas and a low permeability to the second gas.

Systems and methods are provided that obtain the same or better level of performance by using lower operating flow rates and pressures within the system. This extends the life of system components and lower energy consumption. In one embodiment, gas separation (or sieve) beds that are used to separate gaseous components are provided that have lower flow and pressure requirements compared to conventional beds. The sieve beds include, for example, a diffuser having low solid area in cross-section and maximum open area for flow while providing adequate mechanical properties to contain sieve material and support filter media. In another embodiment, systems and methods are provided having an indicator when a component has been serviced or repaired. This provides an indication whether the component has been tampered with in any manner. This allows the manufacturer to determine if the component was serviced, repaired, or tampered with outside the manufacturer's domain.