Abstract: A dehumidifier for an electrical-equipment air intake has an outer housing wall and a floor of a material with a high specific thermal conductivity downwardly closing the outer housing wall, having a downwardly tapering funnel-shaped inner surface formed with a central downwardly open port, and having a rounded edge where the surface meets the port. An inner air-permeable housing inside the outer housing wall holds a moisture-absorbing mass so that air drawn in through the port can pass through the mass and then into a space between the inner and outer housings. A moisture sensor is provided between the housings and a heater in the mass. A controller connected between the heater and the sensor energizes the heater and cooks moisture out of the mass such that the moisture condenses on the floor and runs over the edge out through the port.

Abstract: A method and a device for discharging air current from a cooking area. The method and the device guide the air current through a sorption agent for absorbing water or water vapor contained in the air current. The sorption agent is regenerated preferably when the air current is not being discharged from the cooking area.

Abstract: A surface (30) suitable for promoting the formation of droplets of liquid (35) is provided comprising alternating regions of liquid repelling (32) and liquid attracting (33) material in at least one direction across the surface wherein the diameter of the droplets is controlled by the size of the smallest dimension of the liquid attracting material. The surface (30) may be textured and/or form a pattern. Also disclosed are a method and a system of collecting a liquid (35) carried by or condensed out of a vapor comprising passing a vapor across such a surface (30) and a method of purifying a liquid by passing a vapor containing droplets of a liquid over such a surface.

Abstract: A polar-substance-permselective membrane includes a porous support and an active-membrane material. The active-membrane material fills the pores of the porous support to render the support substantially impermeable to non-polar gases at a moderate pressure gradient (e.g., at least 70 kPa) when the hydrophilic active-membrane material is wet. In a particular embodiment the membrane is water-permselective and the active-membrane material is hydrophilic. Water-recovery system and processes utilizing these water-permselective membranes can be used to selectively remove water from hot gas streams at the feed side, and collect water at the permeate side with extremely high energy efficiency. The membrane is particularly useful for in-situ extraction of water molecules directly from hot exhaust streams. The produced steam, or steam and air mixtures can be used as a feedstock in the process of converting liquid hydrocarbons into hydrogen-rich gas streams.

Abstract: The web of the invention can comprise a super absorbent layer that can act as an moisture sensitive fuel shut-off valve, absorbent, adsorbant or reactant. The web of the invention can comprise a super absorbent fabric or layer made of a superabsorbent particle or fiber. The web can comprise a nanofiber layer having dispersed within the nanofiber layer a super absorbent particulate and optionally a second particulate material that can act as an absorbent, adsorbant or reactant. Fluid, gas or liquid, that flows through or by the assemblies of the invention can have any gas, liquid or solid material dispersed or dissolved in the fluid interact with the super absorbent particulate. If needed these materials can also react with, be absorbed by, or adsorbed onto, the active particulate within the nanofiber layer.

Abstract: The various embodiments of the present invention relate to compositions, apparatus, and methods comprising sorbent fibers. More particularly, various embodiments of the present invention are directed towards sorbent fiber compositions for temperature swing adsorption processes. Various embodiments of the present invention comprise sorbent fiber compositions, apparatus comprising a plurality of sorbent fibers, and methods of using the same for the capture of at least one component from a medium, for example CO2 from flue gas.

Abstract: A water vapor ejector comprises a desiccant disposed in a communication path to a green house enclosure. In the day time and under sunlight exposure, the green house enclosure heats up, which dries the desiccant and generates a flow to the outside ambient through a pressure difference. The moisture trapped in the desiccant is then released to the outside ambient. In the night time, the green house enclosure cools, which generates a flow to the inside of the enclosure. The desiccant traps the moisture within the flow, ensuring a moisture-free enclosure. The cycle re-starts in the next morning when the enclosure heats up. The diurnal cycle removes the water vapor present in the enclosure and delivered to the exterior of the enclosure.

Abstract: A moisture absorbent composition is provided with a thermoplastic resin; and a moisture absorbent kneaded into the thermoplastic resin, having a secondary particle size of substantially 1 to 40 ?m, wherein equilibrium humidity is controlled by selecting the specific gravity of the thermoplastic resin. A method for controlling equilibrium humidity in a moisture absorbent composition obtained by kneading a moisture absorbent into a thermoplastic resin is provided, which includes kneading the moisture absorbent such that a secondary particle size of the moisture absorbent is substantially 1 to 40 ?m; and controlling equilibrium humidity by selecting specific gravity of the thermoplastic resin.

Abstract: A pressure swing adsorption (PSA) dryer for separating water and carbon dioxide from a gas stream includes two compound adsorbent columns [32, 42]. Each column comprises a primary adsorption material for adsorbing water and a secondary adsorbent that adsorbs carbon dioxide. The secondary adsorbent comprises a solid amine. The secondary adsorbent may be, for example, a highly porous polystyrene matrix with amine groups bonded to the porous resin structure. Preferably, a mixture of the primary and secondary adsorbent materials forms an intermediate layer [38, 48] sandwiched between a top layer [34, 44] and bottom layer [36, 46] of pure water adsorbent material in each of the columns [32, 42].

Abstract: A packed bed of granulated porous glass is used to purify a gas mixture comprising two gases whose boiling points or sublimation points at one atmosphere are least 10° K apart.

Abstract: A method and a system for providing a hypoxic environment inside an enclosed compartment with simultaneous removal of carbon dioxide and moisture produced by occupants; said method and system designed for fire prevention and for simulated altitude training, wellness and hypoxic therapy, including equine and other animal applications.

Abstract: An improved control scheme is set forth for an adsorption process that removes water and carbon dioxide (CO2) from a feed gas using a hybrid of both temperature swing (i.e. TSA) and pressure swing (PSA) to regenerate the adsorbent. The control scheme comprises adjusting the quantity of heat to be provided by the regeneration gas as a function of temperature data taken within a strategic portion of the water selective adsorbent zone. The strategic portion corresponds to the location for the desired transition from regeneration by temperature swing, to regeneration by pressure swing. In a preferred embodiment of the present invention, said quantity of regeneration heat is also adjusted as a function of the water content of the feed gas.

Abstract: An air and gas purification system having combined adsorbent material layers in a regenerable adsorbent system. A first adsorbent material, molecular sieve material, is positioned at the inlet end of the adsorbent bed and a second material, activated alumina, is positioned at the outlet end. Additional adsorbent materials may be positioned between the inlet adsorbent material and the outlet adsorbent material. This system, utilizing the combination of adsorbent layers, is particularly useful for fuel cell applications, where the adsorbent system is positioned in the incoming oxidant stream to reduce, and preferably remove, the contaminants that would affect the efficiency of the fuel cell. Using such a system allows using ambient air as the oxygen source.

Abstract: An apparatus and method for separating breathable oxygen gas from a source of gas and then humidifying the oxygen gas while preventing over humidification of the oxygen gas, the apparatus comprising a gas pathway located on a first side of a water transfer member, an oxygen gas pathway located on a second side of the water transfer member and a separator for separating the breathable oxygen gas from a gas located on the first side of the water transfer member and directing the breathable oxygen gas past the second side of the water transfer member while maintaining the pressure of the gas substantially equal to the pressure of the breathable oxygen gas to thereby humidify the breathable oxygen gas while preventing a moisture condensation in the breathable oxygen gas.

Abstract: A surface (30) suitable for promoting the formation of liquid (35) is provided comprising alternating regions of liquid repelling (32) and liquid attracting (33) material in at least one direction across the surface wherein the diameter of the droplets is controlled by the size of the smallest dimension of the liquid attracting material. The surface (30) may be textured and/or form a pattern. Also disclosed are a method and a system of collecting a liquid (35) carried by or condensed out of a vapour comprising passing a vapour across such a surface (30) and a method of purifying a liquid by passing a vapour containing droplets of a liquid over such a surface.

Abstract: A device and method for preventing ingression of contaminants and moisture and for removing moisture from a fluid reservoir, the device comprising a fluid reservoir for supporting a fluid therein, a fluid reservoir opening for allowing an exchanging of air between an interior of the fluid reservoir and the ambient surrounding, and a membrane-based reservoir dryer located in fluid communication with the fluid reservoir, the membrane-based reservoir dryer comprising a source of compressed gas and a membrane dryer for drying the compressed gas to increase the capacity of the compressed gas for absorbing moisture from the fluid in the reservoir.

Abstract: An adsorption dryer includes a pressure vessel containing the drying agent in a cylindrical chamber, which is in the form of a cylindrical tubing section. The pressure vessel is axially clamped between a bottom and a top distributor plate. In the cylindrical chamber of the pressure vessel, the drying agent is enclosed between a bottom piston and a top piston. The two pistons are radically sealed against the inside of the wall of the pressure vessel. Tongue and groove connections between the wall of the pressure vessel and the piston can hold the pistons axially. The bottom and top distributor plates are clamped with the pistons by means of threaded bolts. The tongue and groove connection between the piston and the pressure vessel and the bolt connection of the distributor plates with the pistons ensure comparatively low cost of production and assembly.

Abstract: A method for producing water includes removing water from a first airflow using a first process which includes exposing at least some of the first airflow to a desiccant. This increases water content of at least some of the desiccant. At least some of the desiccant having increased water content is introduced into a second airflow. This facilitates evaporation of water from the desiccant into the second airflow, and increases water content of the second airflow. Water is then removed from the second airflow.

Abstract: An apparatus is provided for removing airborne moisture from a designated area. In one embodiment, the apparatus includes a bucket, a liquid absorption medium (such as ground corn cobs) placed in the bottom of the bucket to form a media bed, a tray placed over the absorption media bed, and a moisture absorption medium (such as calcium chloride) placed in the bucket over the tray. A method is also provided for absorbing moisture from a humid environment using the apparatus. When the apparatus is exposed to humid conditions, the CaCl2 will absorb moisture and become hardened. As the CaCl2 media hardens, it will expand. However, its lateral expansion is restricted by a side wall of the tray. Over further time, the CaCl2 will begin to dissolve into a brine. The brine will gravitationally seep through the through-openings in the tray and be captured by the corn cob medium.

Abstract: The present invention is directed to an apparatus and a method for continuously removing water vapor from a closed loop, re-circulated gas flow in an ion mobility spectrometer using a water permeable membrane, having a first side and a second side opposite the first side. The gas flow is disposed adjacent and carried past the first side to deposit water vapor that passes through the membrane to the second side. An exhaust flow is disposed adjacent and carried passed the second side of the membrane to remove the water vapor from the system. Therefore, the water removal apparatus continuously regenerates in-situ. Heaters, heat sinks and additional treatment systems including charcoal filters can also be included in the system to enhance its performance.

Abstract: A moisture absorbent composition is provided with a thermoplastic resin; and a moisture absorbent kneaded into the thermoplastic resin, having a secondary particle size of substantially 1 to 40 ?m, wherein equilibrium humidity is controlled by selecting the specific gravity of the thermoplastic resin. A method for controlling equilibrium humidity in a moisture absorbent composition obtained by kneading a moisture absorbent into a thermoplastic resin is provided, which includes kneading the moisture absorbent such that a secondary particle size of the moisture absorbent is substantially 1 to 40 ?m; and controlling equilibrium humidity by selecting specific gravity of the thermoplastic resin.

Abstract: Apparatus and methods useful for removal or reduction of moisture from fluids are described. In one embodiment the apparatus comprises a moisture separation unit comprising a thermally regenerable moisture adsorption material having feed and waste sides, and means for regenerating the thermally regenerable moisture adsorption material. The feed fluid contacts the feed side, while a dry, preferably heated purge gas flows past the waste side. The thermally regenerable moisture adsorption material is regenerated by contacting with the heated dry purge gas. The apparatus and methods are particularly useful in supplying dehydrated electronic specialty gases to semiconductor tools.

Abstract: Moving bed adsorber and desorber apparatus and methods, wherein adsorbent material (e.g., beads of resin) moves over a series of vane members and a fluid flow passes between the vane members and through the flowing bed of adsorbent. An adsorbent depth regulator is positioned a spaced distance from the vanes to regulate the depth of the flowing adsorbent bed. In some embodiments, the adsorbent flow may be divided into 2 or more separate streams that pass over 2 or more separate arrays of vane members. Also disclosed are shell and tube desorber apparatus wherein the shell and tube are positioned at certain angle(s) to optimize flow and recovery of contaminant from an adsorbent material and/or wherein vacuum is applied to the adsorbent concurrently with heat to enhance the desorption of contaminant from the adsorbent material.

Abstract: The present invention relates to a process for purifying a syngas of the CO/H2 or N2/H2 type, which consists in removing CO2 and possibly other gaseous impurities (water, etc.) before the gas undergoes a cryogenic process. These impurities are adsorbed by the gas stream to be purified passing over an NaLSX-type zeolite and then desorbed during a regeneration step which may be performed by raising the temperature (TSA) and/or reducing the pressure (PSA or VSA).

Abstract: A lithium exchanged zeolite X adsorbent blend with improved performance characteristics produced by preparing a zeolite X, preparing a binder which includes highly dispersed attapulgite fibers wherein the tapped bulk density of the highly dispersed attapulgite fibers measured according to DIN/ISO 787 is more than about 550 g/ml, mixing the zeolite X with the binder to form a mixture, forming the mixture into a shaped material, ion exchanging the zeolite X at least 75% with lithium ions, and calcining the shaped material.

Abstract: A gas recovery system comprising a source of gas having a preselected concentration of a desired component (9), at least one application (1) that adds impurities to said gas, and at least one an adsorption system (6) that purifies said gas to produce a purified gas for re-use in application (1), wherein said at least one adsorption system includes at least one adsorbent bed (A) having at least three layers of adsorbents. A recovery process is also disclosed.

Abstract: A composition comprising a magnesium halide coated macroporous carbonaceous substrate is provided for effecting moisture removal from a hydrogen halide fluid. Moisture removal is effected by intimately contacting the hydrogen halide fluid with the magnesium halide coated macroporous carbonaceous substrate and separating the fluid from the coated substrate.

Abstract: Process for drying wet F32, which comprises placing a stream of the said F32 in continuous contact with a feed stock of a composition comprising a molecular sieve chosen from a 3A type sieve, at a temperature of between 5 and 78° C. and at a pressure of between 0.5 and 25 atm.

Abstract: For PSA or TSA prepurifiers, the temperature rise on adsorption is particularly troublesome when the temperature rise reaches the end of the bed at the end of the adsorption step. This results in an increase in the CO2 and N2O concentration at the end of the cycle. Addition of a regenerator in the middle of the adsorption layer will reduce the temperature rise at the end of the bed and thus enhance the performance of the bed.

Abstract: In one aspect, the invention is a lighting assembly comprising a housing defining an internal space within the housing, and an ambient space surrounding the housing, a light source within the internal space; a high capacity desiccant within the internal space, the high capacity desiccant being nonregenerating at temperatures of up to about 50 degrees Celsius and about 11.0% relative humidity; and a diffusion tube having a first opening proximate to the internal space and a second opening proximate to the ambient space, the diffusion tube providing gaseous communication between the internal space and the ambient space.

Abstract: Herein is disclosed a method and an apparatus for preparing a highly purified gas from a crude liquid comprising the gas and one or more of a metal, particulates, water vapor, or a volatile impurity. The method comprises: (a) vaporizing the crude liquid, to yield (i) a first vapor stream comprising the gas and (ii) a first liquid stream comprising the gas; (b) removing water vapor, particulates, or both from the first vapor stream, to yield a second vapor stream comprising the gas; (c) condensing the second vapor stream, to yield a second liquid stream comprising the gas; and (d) sparging the second liquid stream with an inert gas, to yield (i) a third vapor stream comprising the gas and (ii) a third liquid stream comprising the highly purified gas. Also disclosed is a method for preparing an adsorbent to effectively remove water vapor from the gas, as well as an adsorbent so prepared.

Abstract: Using a high pressure rotary adsorbent wheel, a high value compressed gas feed can be purified by concentrating the impurity such as water, condensing it out, before final purification. Instead of exhausting gas from the system, the effluent can be put back into the feed at a point prior to condensation of the high value gas feed, and therefore the entire feed is purified without any high value gas feed going into a waste stream.

Abstract: Purification material for removing a contaminant from an impure hydride gas comprising an adsorbent comprising a reduced metal oxide on a porous support and a desiccant. The porous support may be selected from the group consisting of activated carbon, alumina, silica, zeolite, silica alumina, titania, zirconia, and combinations thereof. The reduced metal oxide may comprise one or more metals selected from the group consisting of Group I alkali metals (lithium, sodium, potassium, rubidium, and cesium), Group II alkaline earth metals (magnesium, calcium, strontium, and barium), and transition metals (manganese, nickel, zinc, iron, molybdenum, tungsten, titanium, vanadium, cobalt, and rhodium). The desiccant may be selected from the group consisting of hygroscopic metal salts, zeolites, single metal oxides, mixed metal oxides, and combinations thereof.

Abstract: Process for purifying or separating a gas or gas mixture using a monolithic adsorbent for the separation or purification of gases or gas mixtures, having a cellular structure with open porosity in the form of a solid foam permeable to the gas molecules. The gas phase of the adsorbent possesses an essentially convex structure and the solid phase an essentially concave structure. The solid foam has a density of greater than or equal to 500 kg/m3 and an open porosity of between 20 and 60%. The gas is air or an H2/CO mixture. The process is of the VSA, PSA or TSA type. This process can be used in particular in OBOGS-type systems to supply passengers of the vehicle or a device participating in the traction of the vehicle and/or in its electrical supply, in particular a fuel cell. This process can also be used in medical oxygen concentrators.

Abstract: A vehicle air system has an air dryer which is periodically regenerated by reverse flow of dry air. The regeneration threshold is variable, and determined according to the operating state of the vehicle. The operating state is in turn determined from easily measurable vehicle status parameters, preferably in the form of on/off or in/out signals.

Abstract: A method and composition for the removal of contaminants in a gas stream used in the contamination sensitive processes of photolithography and metrology are described. The synergistic effect of a combination of an electropositive metal component, a high silica zeolite, and a late transition metal compound effects removal or reduction of the contaminates in the gas which interfere with light transmittance to the ppb or ppt levels necessary for the gas to be suitable for these uses. The removal of neutral polar molecules, neutral polar aprotic molecules, protic and aprotic alkaline molecules, acidic polar species, and neutral non-polar aprotic molecules is accomplished with the claimed composition. Depending on the type of contaminant, the composition components are each varied from 10 to 80 parts by volume, with the total composition limited to 100 parts by volume.

Abstract: A process and system for the synthesis and/or purification of crude germane to provide a purified germane product are disclosed herein. In one aspect of the present invention, there is provided a process for making a purified germane product containing less than 1 volume percent of one or more germanium-containing impurities comprising: providing a crude germane fluid; passing at least a portion of the crude germane fluid through a first adsorbent which selectively adsorbs water and carbon dioxide contained therein and withdrawing therefrom a partially purified germane fluid; passing at least a portion of the partially purified germane fluid through a second adsorbent which selectively adsorbs the one or more germanium-containing impurities contained therein and withdrawing therefrom a hydrogen-enriched purified germane fluid; and separating the purified germane product hydrogen from the hydrogen-enriched purified germane fluid.

Abstract: A method and apparatus for preventing contamination of a substrate or a substrate surface, and particularly relates to prevention of contamination of raw materials, semi-finished products, base materials of products and substrate surface in a high-tech industry such as an in the production of semiconductors and liquid crystals. A gas coming into contact with a base material or substrate is purified by dust removing apparatus and adsorption and/or absorption apparatus so that the concentration of fine particles in the gas is below class 1,000 and a non-methane hydrocarbon concentration is below 0.2 ppm. Thereafter, the base material or the substrate surface is exposed to this gas.

Abstract: A system and a process for recovering high concentrations of methane from crude natural gas and solid waste landfill exhaust gas uses a sequential combination of a pressure swing adsorber unit operation to remove volatile organic compounds from the crude feed gas mixture followed by a membrane separation unit operation. The membrane separation uses a membrane which is selectively gas permeable to reject transmission of methane and thus to produce a permeate depleted in methane relative to the feed mixture. The permeate is also free of volatile organic compounds and is recycled to the pressure swing adsorber unit operation to regenerate saturated adsorbers.

Abstract: Zeolite adsorbent, and method of production, exchanged with calcium and barium cations, for purifying or separating a gas or gas mixture, in particular air, so as to remove therefrom the impurities found therein, such as hydrocarbons and nitrogen oxides (NxOy). The adsorbent is preferably an X or LSX zeolite and the gas purification process is of the TSA type.

Abstract: A system for removing moisture from a wet gas stream including a vessel having a contact area containing deliquescing salts that produces brine as water is absorbed, the brine flowing to a collection area in the bottom of the vessel. A venturi positioned in a wet gas inlet stream produces an area of reduced pressure that is applied to a brine flow path connected to the brine collection area. In this way, the brine is recirculated into intimate contact with the wet gas inlet stream causing the brine to be diluted with water extracted from the wet gas stream.

Abstract: A method of separating a gas mixture using a permeation membrane unit, wherein the gas mixture, containing primarily hydrogen and carbon monoxide, is first treated to reduce the level of secondary components to lower than 100 molar ppm.

Abstract: A method and apparatus for the extraction of water from a gas stream, such as atmospheric air. The method includes contacting the gas stream with a porous adsorbent material having a surface modifying agent adsorbed on the surface of a porous support. The surface modifying agent creates a hydrophilic surface for the adsorption of the water. After the water is adsorbed into the pores, the surface modifying agent is selectively desorbed from the surface. The water then evaporates from the pore and can be collected in a condenser. The method and apparatus of the present invention advantageously operate in a substantially isothermal manner, thereby reducing the size and power consumption of the device. The device can advantageously be used to extract potable drinking water from atmospheric air.

Abstract: A dehumidifying agent of coating film delamination type, characterized in that it comprises a package formed by using, at least partly, a sheet having a double layer structure, wherein a film unsusceptible to moisture permeation is arranged on the surface side and a moisture-permeable film is arranged on the inner side, and a deliquescent salt filled in the package, and it is subjected to use through delaminating the film unsusceptible to moisture permeation. The dehumidifying agent can be packaged with simplicity and ease and can be stored for a long period of time, and as a result, can be provided with improved economy.

Abstract: A Process for the production and uses of a molecular sieve adsorbent blend product with improved performance characteristics produced by preparing a zeolite powder, preparing a highly dispersed attapulgite fiber binder, mixing the zeolite powder with the highly dispersed attapulgite binder to form a mixture, forming molecular sieve adsorbent products into a shaped material and calcining the shaped material, wherein the tapped bulk density of the highly dispersed attapulgite fibers measured according to DIN/ISO 787 is more than about 550 g/ml.

Abstract: A device for absorbing atmospheric moisture includes a support member with a net extending therefrom. The net includes a super absorbent polymer that has the property of being able to absorb a multiple of the polymer mass in atmospheric water and to thereafter release the water in response to an external stimulus. The device is in this way reusable. The device has particular application in the clearing of fog, manure odor clearance, and collection of potable water in remote locations. A process for extracting atmospheric moisture is also detailed that includes the step of extending a super absorbent polymer net into contact with an atmosphere. Thereafter, with that being in contact with the atmosphere for a sufficient amount of time moisture is absorbed from the atmosphere. The application of a stimulus to the super absorbent polymer containing atmospheric moisture causes the release of liquid water therefrom. The super absorbent polymer is then suitable for reuse to again absorb atmospheric water.

Abstract: An adsorbent composition containing a modified carbonaceous material capable of adsorbing an adsorbate is disclosed, wherein at least one organic group is attached to the carbonaceous material. Furthermore, methods to increase the adsorption capacity of a carbonaceous material capable of adsorbing an adsorbate and methods to adsorb an adsorbate using the above-described adsorbent composition are also disclosed.

Abstract: A method and a device for filtering polluted air, in which the air is successively subjected to the processes of extracting grease/fat and water, drying air still containing residual humidity, and adsorbing smells/odors. The filter device includes, in a direction of flow a vortex filter, layers of expanded metal, a filter for drying the air, and an odor filter, all in a filter housing. The filter for drying the air and the odor filter are, preferably, combined in a filter cassette that is disposed on the filter housing such that it can be changed/replaced.

Abstract: An apparatus and a method for purifying the air used in cryogenic air separation are described, which are capable of effectively removing nitrogen oxides and/or hydrocarbons. The apparatus comprises an adsorber comprising an adsorption cylinder that has a first adsorbing layer and a second adsorbing layer therein. The first adsorbing layer is composed of a first adsorbent capable of selectively adsorbing water in the air. The second adsorbing layer is composed of a second adsorbent capable of selectively adsorbing nitrogen oxide and/or hydrocarbon in the air passing the first adsorbing layer, wherein the second adsorbent comprises an X zeolite containing magnesium ion as an ion-exchangeable cation.

Abstract: A novel method and apparatus to dehumidify air provides enhanced dehumidification efficiency over conventional dehumidification apparatuses. A reusable dehumidification element disk provides a disk section to strip water from an air stream. The disk is rotated so that the saturated disk section enters a separate chamber where the water can be stripped from the disk with a stream of regeneration air. The regeneration air stream is recycled and is not split from or mixed with the air stream requiring dehumidification. The result is a more efficient dehumidification than in appara- tuses which require the influent air stream to be divided into separate streams for dehumidification and regeneration functions.