Abstract: The present invention relates to a solid state facilitated transport separation membrane prepared by using a polymer electrolyte, wherein the facilitated transport separation membrane has good stability and improved permeance and selectivity of alkene-series hydrocarbons.

Abstract: A method for producing a tubular hydrogen permeation membrane comprising: (a) adhering at least one layer containing palladium, at least one palladium alloy, platinum, or at least one platinum alloy to a first surface of a plate having such first surface and a second surface disposed opposite to the first surface, the plate being of a metal or a metal alloy containing at least one metal from a group of the Periodic System of Elements selected from the group consisting of the fourth secondary group and the fifth secondary group, to form a layered plate; and (b) reshaping the layered plate into a tubular hydrogen permeation membrane having an inside wall, so that the layer adhered to the first surface is disposed on the inside wall of the tubular hydrogen permeation membrane.

Abstract: A novel method of producing an improved thin hydrogen-selective palladium-alloy membrane, through solid-solid interdiffusion of thin films or layers of palladium and a palladium-enhancing metal, such as copper, subjected in the presence of a reducing agent, such as hydrogen, to an elevated temperature below the melting point of both metals, for a sufficient time to effect substantially complete interdiffusion of the metals.

Abstract: A two-phase proton and electron conductor is described which comprises (a) a proton conductive oxides represented by the formula: ABO3 where A is selected from the group consisting of Ba, Ca, Mg and Sr and B is Ce1−xMx or Zr1−xMx, where x has a value greater than zero and less than one and M is an element selected from the group consisting of Y, Yb, In, Gd, Nd, Eu, Sm and Tb, in combination with (b) an electron conductor comprising palladium. The palladium may be coated on particles of the oxide in the form of an oxide powder. This novel two-phase conductor is particularly useful as a mixed hydrogen ion and electronic conducting membrane for separating hydrogen from a hydrogen-containing gas.

Abstract: A membrane for separating hydrogen from a gas mixture is provided on at least one side with a catalyst layer for a specific catalytic combustion process. A methanol reformation system so equipped can be brought rapidly to operating temperature, with the hydrogen-separating membrane being heated directly by performing the catalytic combustion process.

Abstract: An apparatus for extracting a gas, in particular hydrogen, from a fluid stream utilizing a plate membrane flattened with a wave spring on the low pressure side of the membrane and a turbulence generator on the high pressure side. Alternately, the membrane is folded and wrapped against a central conduit within the membrane fold. Extraction membranes have a substrate layer of Ta—W, V—Co, V—Pd, V—Au, V—Cu, V—Al, Nb—Ag, Nb—Au, Nb—Pt, Nb—Pd, V—Ni—Co, V—Ni—Pd, V—Nb—Pt or V—Pd—Au alloy or combination thereof and a first layer affixed to the outer surface of the substrate towards a mixed gas flow which is composed of palladium, platinum, rhodium, or palladium alloys.

Abstract: A filter medium for air filters wherein the collection performance of polytetrafluoroethylene (PTFE) membranes is not damaged even after processing, for example, pleating and bonding to air-permeable supporting members. The filter medium containing a laminate (2) containing at least three layers of porous PTFE membranes wherein the pressure drop of a porous PTFE membrane (4) located as an outermost layer has a pressure drop of 1/2 times or less the pressure drop of porous PTFE membrane (5) located as at least one intermediate layer. Air-permeable supporting members (3) are bonded to both outermost layers of the laminate (4) to obtain a filter medium for air filters (1).

Abstract: A composite metal membrane including a first metal layer of a Group IVB or Group VB metal sandwiched between two layers of a Group VIIIB metal selected from the group consisting of palladium, platinum, nickel, rhodium, iridium, cobalt, and alloys thereof, and a non-continuous layer of a metal chalcogenide upon one layer of the Group VIIIB metal is disclosed together with a process for the recovery of hydrogen from a gaseous mixture using such a composite membrane and a process for forming such a composite metal membrane.

Abstract: A method for the formation of a zeolite membrane, which comprises preparing raw materials (a) and (b) for the synthesis of zeolite, at least one of the raw materials containing water, positioning the raw material (a) for the synthesis of zeolite so as to contact one lateral face of a porous body and the raw material (b) therefor so as to contact the other lateral face of the porous body, causing the two raw materials (a) and (b) to permeate the porous body thereby forming an interface of the two raw material in pores of the porous body, and inducing a reaction of hydrothermal synthesis at the interface, a porous body obtained by the method and having a zeolite membrane formed in the pores thereof, and a membrane used for separation and purification of gas and formed of the porous body.

Abstract: A multi-phase solid electrolyte ion transport membrane comprising at least two phases wherein one of the phases comprises an oxygen ion single conductive material, or a mixed conductor. The other phase comprises an electronically-conductive metal or metal oxide that is incorporated into the membrane by deposition of the metal or metal oxide from a polymer made by polymerizing a chelated metal dispersion in a polymerizable organic monomer or prepolymer. The multi-phase composition advantageously comprises a first phase of a ceramic material and a second phase of a metal or metal oxide bound to a surface of the ceramic material. The multi-phase composition is advantageously prepared in an in-situ fashion before fabricating the membrane matrix. As another alternative, a preformed ceramic matrix is surface-coated with a metal or metal oxide.

Abstract: An assembly for separating molecular hydrogen from a volume of gas. The assembly includes a first conduit through which a gas at a first pressure flows, wherein the gas at least partially contains hydrogen. A second conduit intersects the first conduit. The second conduit is maintained at a pressure less than the first pressure of the first conduit. A hydrogen permeable membrane is disposed within the second conduit, wherein the membrane prevents the gas from flowing directly into the second conduit. Since the membrane is hydrogen permeable, a predetermined flow rate of hydrogen permeates through the membrane into the second conduit. The hydrogen permeable membrane contains a layer of hydrogen permeable material. The layer of hydrogen permeable material has a top surface and a bottom surface. A first metal mesh element is bonded to the top surface of the layer of hydrogen permeable material.

Abstract: An apparatus for extracting a gas, in particular hydrogen, from a fluid stream utilizing a plate membrane flattened with a wave spring on the low pressure side of the membrane and a turbulence generator on the high pressure side. Alternately, the membrane is folded and wrapped against a central conduit within the membrane fold. Extraction membranes have a substrate layer of Ta—W, V—Co, V—Pd, V—Au, V—Cu, V—Al, Nb—Ag, Nb—Au, Nb—Pt, Nb—Pd, V—Ni—Co, V—Ni—Pd, V—Nb—Pt or V—Pd—Au alloy or combination thereof and a first layer affixed to the outer surface of the substrate towards a mixed gas flow which is composed of palladium, platinum, rhodium, and palladium alloys.

Abstract: Apparatus and an associated method of operation are disclosed for removal of gaseous contaminants, particularly oxygen, from closed containers. The apparatus is economical, simple to install and operate, of convenient size, and highly effective. A gas extractor communicates with a container for a gas-sensitive product. A high gas concentration in the container causes operation of the extractor until the gas concentration is reduced to a desired low level, when the extractor operation stops. Separate sensors and controllers responsive to concentrations can be present, or the extractor can be self-actuated by use as a power source of a battery which operates on gas generated by operation of the extractor. The system preferably is used for oxygen extraction from containers holding oxygen-sensitive contents. The preferred extractor includes an electrochemical cell which has a ion-permeable membrane disposed between two electrodes.

Abstract: An improved plate-and-frame assembly selectively transfers a fluid component from one fluid stream to another fluid stream. In a preferred embodiment, a plate-and-frame humidity exchanger with unitary plates and seals transfers water vapor and heat between two fluid streams.

Abstract: A high temperature membrane reactor or gas purification apparatus includes a housing containing a gas heating chamber and a gas extraction component, preferably one or more tubular membranes. The preferred application is for extracting hydrogen from a mixed gas flow or for generating hydrogen, e.g., by reforming methanol, ethanol, or gasoline. A surrounding annulus provides heat exchange and insulation by circulating the mixed gas flow about the housing and then injecting the mixed gas flow into the housing for extraction or reaction. The apparatus further includes an outlet for releasing raffinate preferably including a flow controlling restriction. Heating is provided by conducting the raffinate from the gas extraction component to the heating chamber wherein reaction with a catalyst generates heat. These features, alone or in combination, provide better energy management, better flow management, and better safety than current designs.

Abstract: A method of enriching chlorine gas is described, which method comprises: (a) providing a supported ceramic membrane having a feed side and a permeate side; (b) bringing a feed gas comprising chlorine gas and contaminant gas into contact with the feed side of the ceramic membrane; (c) removing a gaseous permeate depleted in chlorine from the permeate side of the ceramic membrane; and (d) recovering a gas enriched in chlorine from the feed side of the ceramic membrane. The supported ceramic membrane has pore diameters in the range of from 3 angstroms to 12 angstroms. Preferably, the supported ceramic membrane is a substantially cylindrical supported ceramic membrane having a substantially cylindrical internal coaxial passage.

Abstract: A hydrogen gas-extraction module includes an intermediate layer bonded between a porous metal substrate and a membrane layer that is selectively permeable to hydrogen. The metal substrate includes a substantial concentration of a first metal at a surface of the metal substrate, and the intermediate layer includes an oxide of this first metal. In one embodiment, where the module is designed to selectively extract hydrogen at high temperatures, the porous metal substrate comprises stainless steel, and the membrane layer includes palladium or a palladium/silver alloy. A method for fabricating a hydrogen gas-extraction membrane includes reacting the porous metal substrate with an oxidizing agent to form a ceramic intermediate layer on a surface of the porous metal substrate and covering the ceramic coating with the membrane layer that is selectively permeable to hydrogen.

Abstract: An electrochemical autothermal reformer (EATR) provides hydrogen. The EATR includes an autothermal reformer region, a reformer anode supply region, and a composite membrane layer separating the reformer anode from the autothermal reformer region. The composite membrane layer includes a mechanically stable porous ceramic support member with a thin gas permeable ceramic substrate layer overlaying the support member. Overlaying the substrate layer is a first thin metallic catalyst layer which promotes the dissociation of H.sub.2 to 2H.sup.+ +2e.sup.31 . Overlaying the first catalyst layer is a metallic oxide layer capable of conducting 2H.sup.+ +2e.sup.- at elevated temperatures. Overlaying the metallic oxide layer is a second thin metallic catalyst layer which promotes the recombination of 2H.sup.+ +2e.sup.31 to H.sub.2.

Abstract: A turbine generator hydrogen filtration system having an improved membrane filter for the removal of gases and particulates is provided. The system comprises a membrane filter operably connected with defoaming tanks. The hydrogen stream is routed through an improved membrane filter where air and other contaminants such as oil are removed. The hydrogen is recirculated into the hydrogen cooled generator. The membrane filter employed in the system is one of several palladium based membrane filters which effectively remove air and other contaminants and provide high hydrogen through-put.

Abstract: Structures comprising an upper crystalline molecular sieve layer on a support, the crystals being at least partially oriented normal to the plane of the layer, there being a dense intermediate crystalline molecular sieve layer between the support and upper layer.

Abstract: The invention relates to a gas dehydration membrane comprising a membrane having pores communicating between a first and an opposing second surface of the membrane and further having an average pore diameter on the first surface of the membrane which is about 10 to 1000 times smaller than that on the opposing second surface of the membrane. The invention further relates to a process for dehydrating a gaseous feedstock comprising passing the gaseous feedstock over a membrane characterized by high surface porosity wherein pore openings on a first surface thereof are at least 10 to 1000 times smaller than pore openings on an opposing surface thereof and wherein from about 2% to about 30% of the pore volume is occupied by a humectant.

Abstract: Structures comprising a crystalline molecular sieve layer on a substrate and an additional layer of a refractory material to occlude voids in the molecular sieve layer.

Abstract: A gas separator includes a porous substrate having fine pores opened on its surface and a metal for separating a gas, the porous substrate having fine pores having an average diameter of 0.1-3.0 .mu.m and a porosity of 25-45%, and the metal for separating a gas being filled into the pores in the porous substrate to close them. A gas separation film seldom exfoliates from the porous substrate, and the gas separator is excellent in durability in comparison with a conventional gas separator.

Abstract: The present invention presents a fluid separation device capable of separating oxygen from an oxygen-containing gaseous mixture which utilizes at least one solid-state membrane comprising a dense mixed conducting multicomponent metallic oxide layer formed from a mixed conducting multicomponent metallic oxide represented by the formulaLn.sub.x A'.sub.x A".sub.x B.sub.y B'.sub.y O.sub.3-z,wherein Ln is an element selected from the f block lanthanides, A' is selected from Group 2, A" is selected from Groups 1, 2 and 3 and the f block lanthanides, and B,B' are independently selected from the d block transition metals, excluding titanium and chromium, wherein 0.ltoreq.x<1, 0<x'.ltoreq.1, 0.ltoreq.x"<1, 0<y<1.1, 0.ltoreq.y'<1.1,x+x'+x"=1.0, 1.1>y+y'>1.0 and z is a number which renders the compound charge neutral.

Abstract: The present invention relates to an improved method and apparatus for separating one or more condensable compounds from a mixture of two or more gases of differing volatilities by capillary fractionation in a membrane-type apparatus, and a method of forming porous structures therefor. More particularly, the invention includes methods of forming and using an apparatus consisting, at least in part, of a porous structure having capillary-type passages extending between a plurality of small openings on the first side and larger openings on a second side of the structure, the passages being adapted to permit a condensed liquid to flow therethrough substantially by capillary forces, whereby vapors from the mixture are condensed, at least in part, and substantially in and adjacent to the openings on the first side, and are caused to flow in a condensed liquid state, substantially in the absence of vapor, from the openings on the first side to the openings on the second side.

Abstract: This disclosure features a permeation storage chamber in a tube having a first membrane delivering a permeate flow into an intermediate chamber. This chamber delivers flow from a second membrane. The intermediate chamber delivers surplus permeate out through a pressure regulator, or a drain tube. Pressure stabilization at the second membrane enables constant permeation discharge, avoiding pressure or temperature dependent flow rate charges.

Abstract: A membrane for dry metal-air chemical current sources which posses high oxygen permeability and provide high barrier properties toward water vapor. The invention includes a semipermeable porous asymmetric membrane based on vinylidene fluoride polymer comprising copolymer of vinylidene fluoride with tetrafluoroethylene at 8-70% mass content of tetrafluoroethylene, the membrane pore size being 0.0015-0.030 .mu.m, and the volume porosity being 35-60%, wherein said asymmetric membrane has a more dense porous structure on one side of the membrane than on another side of said membrane, and wherein the water vapor permeability is not more than 0.178 mg/h. cm.sup.2 and the oxygen permeability is not less than 2.70 m.sup.3 /m.sup.2 atm h.

Abstract: A steam reformer with internal hydrogen purification includes internal bulk hydrogen purification, internal hydrogen polishing to remove trace levels of carbon monoxide and carbon dioxide, an integrated combustion method utilizing waste gas to heat the reformer, efficient integration of heat transfer, and a compact design. One steam reformer shown includes a concentric cylindrical architecture nesting an annular combustion region, an annular reforming region, an annular hydrogen transport region, and a cylindrical polishing region. Other reformers shown include modified combustion systems distributed within a reformation region, isolated vaporization chambers, combustion systems providing uniform temperature gradient, and plate membrane construction methods.

Abstract: A gas separator includes a porous substrate having fine pores opened on its surface and a metal for separating a gas, the porous substrate having fine pores having an average diameter of 0.4-0.9 .mu.m, and the metal for separating a gas being filled into the pores in the porous substrate to close them. A gas separation film seldom exfoliate from the porous substrate, and the gas separator is excellent in durability in comparison with a conventional gas separator.

Abstract: The present invention provides a supported membrane assembly comprising a membrane adhered to a support material by way of a nonwoven web of multicomponent fibers therebetween, wherein the multicomponent fibers comprise a first polymer and a second polymer such that the second polymer is present on at least a portion of the surface of the multicomponent fibers and has a softening temperature below the softening temperatures of the first polymer, the membrane, and the support material, and the supported membrane assembly has a water flow rate at least about 20% of the water flow rate of the membrane alone. The present invention also provides a filter element comprising a housing and such a supported membrane assembly, as well as a method of preparing such a supported membrane assembly and methods of using such a supported membrane assembly.

Abstract: A gas separator is here disclosed in which a metal for separating a gas is filled into pores opened on the surface of a porous substrate to close them. The thus constituted gas separator can prevent a material gas from leaking into a purified gas. A method for preparing the gas separator is also disclosed which comprises an activation step of immersing the porous substrate having a pair of surfaces in a solution containing an activated metal, while a pressure difference is set between the pair of surfaces, and a chemical plating step of filling the metal for separating the gas into the pores opened on the surface of the porous substrate to close these pores by chemical plating.

Abstract: Carbogenic molecular sieve devices comprising a porous support (e.g., a metal support) having a carbogenic molecular sieve membrane attached to one or more surfaces of the support so that small pores in the membrane are in communication with larger pores in the support and methods of making the devices.

Abstract: Ultra-high purity hydrogen is produced from a hydrogen stream containing impurities including carbon monoxide and carbon dioxide, by first depleting the stream of carbon monoxide and carbon dioxide, than passing it through a semipermeable membrane such as a palladium-silver membrane, to remove methane, water and other impurities. Preferably, a methanation catalyst is used in the first step to convert the carbon monoxide and carbon dioxide to methane and water. This stream, free of carbon monoxide and carbon dioxide, is then passed through the semipermeable membrane to separate the remaining impurities.

Abstract: A solid electrolyte ion transport membrane composite for separating a gaseous species from a gaseous mixture in which the composite has a dense matrix material and a porous coating. The dense membrane is comprised of a matrix material which conducts at least one type of ion, and at least one membrane constituent. The porous coating is disposed on the membrane to enhance the rate of surface reactions involving the gaseous species.

Abstract: An apparatus (5) and methods for extracting a gas, especially hydrogen, from a fluid stream includes a pressure vessel (12) having an inlet (22) and at least one outlet (26) for allowing fluid flow therethrough. A plurality of extraction membranes (14) are axially disposed in pressure vessel (12). Extraction membranes (14) are selected from cylindrical or approximately cylindrical tubular metal substrate membranes and ceramic or polymeric substrate membranes. Enhanced mass transfer during the extracting is achieved by reducing the diameter and separation barrier thickness of extraction membranes (14) by adding bumps (18), curves, or packing (19). Extraction membranes (14) have inner and/or outer layers of palladium, platinum, rhodium or palladium alloys having greater hydrogen separation surface properties than a core membrane.

Abstract: A hydrogen-selective thin Pd/40% Cu membrane as for use as a wall connecting high and low pressure chambers of a hydrogen generator, comprising the foil having its edge area diffusion-bonded to a copper-surfaced metallic frame; and a method of preparing the same.

Abstract: An oxygen generating device (11, 211) to which a gas mixture containing oxygen is fed, and which is operable to separate the gas mixture into oxygen rich and oxygen depleted gas components, the device (11, 211) including a negative temperature coefficient material (36a 36b 36c; 236) which is active at an elevated temperature above a minimum operating temperature, to separate the gas mixture into oxygen rich and oxygen depleted gas components, there being an electronic control unit coupled to the device to pass an electrical current through the device (11, 211) to produce a heating effect within the device to heat the gas mixture at least towards the minimum operating temperature wherein the device includes a plurality of active sections (A, B, C) through each of which the gas mixture passes in turn, and the electrical current supply is connected to each of the sections (A, B, C) so that the sections electrically are connected in series.

Abstract: An apparatus designed to separate mixtures of materials by use of a stack of spaced membrane elements (11) in the form of membrane cells having bore (112) through which the permeate (130) is discharged. The device (10) includes a feed inlet (14) for the mixture plus discharge outlets (16) for the retentate (17) and permeate (13), and the mixture flowing over the surfaces (110, 11, 180, 181) of the membrane elements (11) in chambers (150) between element (18). Fitted between each pair of membrane elements (11) or between the membrane (11) and deflection (18) elements is an annular support element (19) which surrounds the bore (112) through the membrane element (11) or deflection element (18), the seal between the support element (19) and the membrane (11) or deflection (18) element being formed by a sealing element (191) fitted round the outer circumference (190) of the support element (19).

Abstract: A high temperature membrane reactor or gas purification apparatus includes a housing containing a gas heating chamber and a gas extraction component, preferably one or more tubular membranes. The preferred application is for extracting hydrogen from a mixed gas flow or for generating hydrogen, e.g., by reforming methanol, ethanol, or gasoline. A surrounding annulus provides heat exchange and insulation by circulating the mixed gas flow about the housing and then injecting the mixed gas flow into the housing for extraction or reaction. The apparatus further includes an outlet for releasing raffinate preferably including a flow controlling restriction. Heating is provided by conducting the raffinate from the gas extraction component to the heating chamber wherein reaction with a catalyst generates heat. These features, alone or in combination, provide better energy management, better flow management, and better safety than current designs.

Abstract: A separation module to be used for separation and filtration of micro-substances. The separation module comprises a bundled configuration of a plurality of hollow thread-type porous membrane elements made of high polymer material. The bundled configuration is sealingly disposed in a casing, in which the thread-type porous membrane elements are bound each other by means of molten thermoplastic resin.

Abstract: Fabrication and use of porous silicon structures to increase surface area of heated reaction chambers, electrophoresis devices, and thermopneumatic sensor-actuators, chemical preconcentrates, and filtering or control flow devices. In particular, such high surface area or specific pore size porous silicon structures will be useful in significantly augmenting the adsorption, vaporization, desorption, condensation and flow of liquids and gasses in applications that use such processes on a miniature scale. Examples that will benefit from a high surface area, porous silicon structure include sample preconcentrators that are designed to adsorb and subsequently desorb specific chemical species from a sample background; chemical reaction chambers with enhanced surface reaction rates; and sensor-actuator chamber devices with increased pressure for thermopneumatic actuation of integrated membranes.

Abstract: The present invention is directed toward a new zeolite membrane which exhibits a columnar cross-sectional morphology and preferred crystallographic orientation comprising a porous substrate having coated thereon a mesoporous growth enhancing layer and a layer of columnar zeolite crystals on said mesoporous growth enhancing layer, and wherein said mesoporous growth enhancing layer comprises nanocrystalline or colloidal sized zeolites, nanocrystalline or colloidal zeolite and metal oxide, or nanocrystalline or colloidal zeolite and colloidal metal, or nanocrystalline or colloidal zeolite, colloidal metal and metal oxide, and wherein said mesoporous growth enhancing layer has interstices of about 20 to about 2000 .ANG., and wherein said columnar zeolite layer is a polycrystalline layer wherein 99.9% of said columnar zeolite crystals have at least one point between adjacent crystals that is .ltoreq.20 .ANG..

Abstract: A method is provided for efficiently controlling the operation of a vapor recovery system including a first reaction vessel and first bed of adsorbent, a second reaction vessel and second bed of adsorbent and a vacuum pump for selectively regenerating those beds of adsorbent. The method includes the step of adsorbing vapor from an air-volatile liquid vapor mixture on the first bed of adsorbent in the first reaction vessel, measuring a total amount of the vapor adsorbed by the first bed of adsorbent, comparing the total amount of vapor adsorbed on the first bed of adsorbent to a first predetermined value which is a percentage of the first bed adsorbance capacity and regenerating the first bed of adsorbent and adsorbing the vapor from the air-volatile liquid vapor mixture on the second bed of adsorbent in the second reaction vessel upon reaching the first predetermined value.

Abstract: A virus-removing filter using, as a virus-capturing body, at least one kind of sialic acid, a sialic acid derivative, and sugars, glycoproteins and glycolipids containing sialic acid and/or the sialic acid derivative.

Abstract: A hydrogen separation membrane having a good hydrogen selective permeance and a high stability, without any deterioration, even if exposed to a high temperature atmosphere or steam, which comprises a porous ceramic membrane with SiO.sub.2 deposited and filled into pores on the surface of the membrane and a SiO.sub.2 thin film formed on the surface of the membrane as a hydrogen selectively permeable film is produced by introducing a vaporized SiO.sub.2 source into pores on the surface of a porous ceramic membrane by suction established by providing a pressure difference between both sides of the membrane and thermally decomposing the SiO.sub.2 source, thereby forming, depositing and filling SiO.sub.2 into the pores and fully coating the outer surface of the membrane with a SiO.sub.2 thin film simultaneously where the SiO.sub.2 source is preferably a tetra(lower alkoxy)silane and the deposition of the SiO.sub.2 source is preferably carried out by a chemical vapor deposition process.

Abstract: A process for producing and oxygen gas stream, an oxygen-enriched gas stream, or a reaction product stream as a permeate stream and an oxygen-depleted retentate gas stream by first separating oxygen from a feed gas stream and thereafter cooling at least the permeate stream. The production and cooling of the permeate stream occurs within a single apparatus having at least one ion transport membrane.

Abstract: A composite porous ceramic hollow fiber obtained by dipping a porous ceramic hollow fiber into a carbon precursor-forming solution, picking up and drying the dipped porous ceramic hollow fiber, heating the thus deposited carbon precursor-forming film, thereby obtaining a carbon precursor thin film, and heating the carbon precursor thin film at a carbon precursor thermal decomposition temperature, thereby forming a carbon thin film on the porous ceramic hollow fiber has a permeance about 100 to about 1,000 times as high as that of an organic thin film and a separation coefficient as high as that of the organic thin film.

Abstract: An integral coalescer filter-membrane device to provide clean sample gas to gas analyzers. The device includes a housing, an inlet port for feed gas, an outlet port to withdraw clean sample gas essentially free of entrained liquids, such as water, and particulate material which might contaminate or interfere with the gas analyzer, a bypass port and a drain port to remove by gravity coalesced liquid. The device includes a filter tube to coalesce and filter the feed gas stream and a chamber having a supported hydrophobic selected porosity membrane. The outlet port receives clean sample gas from the upper portions of the chamber, while the bypass port removes coalesced filtered gas from a lower chamber.

Abstract: This invention is a composite membrane for chemical synthesis, a chemical reactor into which the composite membrane might be incorporated, and a method of using the composite membrane. The composite membrane comprises a substrate, a first side, and a second side, wherein the substrate operatively connects the first side and second side, the first side comprises an oxidizing catalyst and the second side comprises a reducing catalyst. The reducing catalyst comprises, in elemental or combinative form, lanthanum, zinc, cerium, praeseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, bismuth, or indium. A chemical reactor utilizing this composite membrane can react hydrogen and oxygen to form hydrogen peroxide without direct mixture of the reactants.

Abstract: The present invention relates to novel solid state mixed conductor membranes and their use for separating oxygen from oxygen-containing feeds at elevated temperatures. The membranes comprise a multicomponent metallic oxide of substantially cubic perovskite structure, stable in air over the temperature range of 25.degree.-950.degree. C., having no connected through porosity wherein the membrane is of a composition represented by the formula ?A.sub.1-x A'.sub.x !?Co.sub.1-y-z B.sub.y B'.sub.z !O.sub.3-.delta., where A.tbd.Ca, Sr, Ba, and mixtures thereof; A'.tbd.La, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, and mixtures thereof; B.tbd.Fe, Mn, Cr, V, Ti, and mixtures thereof; B'.tbd.Cu, Ni, and mixtures thereof; .about.0.0001.ltoreq.x.ltoreq..about.0.1; .about.0.002.ltoreq.y<0.05; .about.0.0005.ltoreq.z.ltoreq..about.0.3; .delta. is determined by the valence of the metals.