Abstract: A desulfurization unit for a fuel cell system includes a first desulfurizer arranged in a temperature environment ranging from 50° C. to 200° C. and accommodating a desulfurizing agent including a porous material serving as a base material, the desulfurizing agent exerting a desulfurization effect in a normal temperature range, the first desulfurizer adsorbing a sulfur compound included in a source gas in the temperature environment ranging from 50° C. to 200° C. when the source gas having a low dew point is supplied through a source gas passage to the first desulfurizer and when the source gas having a high dew point is supplied through the source gas passage to the first desulfurizer.

Abstract: The present invention relates to a filtering device for NBC weapons, comprising a hermetically sealed box structure (10), provided with an opening for the inlet of air and/or gas to be filtered and an opening for the outlet of filtered air and/or gas, and within which one or more plates (11) are arranged to define the walls of a course for said air and/or gas from said inlet and said outlet, the sides of the plates (11) facing said course supporting a layer (12) of an adsorbing material.

Abstract: The present invention relates generally to zeolites having a silica/alumina ratio of less than or equal to 10 (Si/Al?10) that are exchanged with Ag+ and thermally treated in such a way to favor adsorption over alternative catalytic and chemically reactive functionalities. The adsorbents of the present invention and the method of producing such adsorbents maximize the working adsorption capacity through ?-complexation. Applications for such adsorbents include any process in which contaminants from gas streams can form ?-complexes with the Ag in the zeolite, particularly the removal of CO, ethylene, propylene and the like from air and CO/H2 from air in prepurifier adsorbers in the production of ultra high purity (UHP) N2.

Abstract: A radial flow reactor vessel is disclosed for use in gas purification, separation or reaction processes and most suitably used in prepurification processes. The reactor has internal baskets for confining a bed of active material. The baskets are rigidly supported at both the top and bottom ends of the reactor and have walls that are axially flexible and radially rigid. The vessel has multiple movable support columns designed to facilitate pre-stressing of the baskets to offset axial compressive loads induced from thermal cycling.

Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.

Abstract: A hydrocarbon adsorption assembly for an air induction system is disclosed. The hydrocarbon adsorption assembly includes a fluid conduit having an outer surface and a spaced apart inner surface to form a fluid path therein, the conduit including a recessed area formed in the inner surface thereof. A hydrocarbon trap is disposed in the recessed area of the fluid conduit to adsorb hydrocarbons passing through the conduit. The recessed area and the hydrocarbon trap cooperate to cause a portion of an air flowing through the flow path of the conduit to flow through the hydrocarbon trap to facilitate a purging thereof.

Abstract: Hydrogen sulfide is removed from a hydrogen rich gas stream using adsorbents having a low loss of carbon dioxide adsorption capacity upon sulfur loading including high purity silica gels, titania or highly cross-linked, non-chemically reactive resins. The adsorbents may be used to adsorb both carbon dioxide and hydrogen sulfide, or may be used as a guard bed upstream of a separate carbon dioxide adsorbent.

Abstract: A self-regenerating bio-gas treatment system that uses the bio-gas instead of atmospheric are as media transport between adsorber and desorber tanks. Each tank includes at least four horizontally stacked and evenly spaced apart, perforated trays each capable being filled with fluidized carbon which migrates downward in the adsorber tank to remove contaminants from the bio-gas. With the bio-gas function as its media transport, the carbon media continuously moves downward over the perforated trays and eventually collected in the bottom of the adsorber tank. The spent carbon is then delivered to the desorber tank. The desorber tank is filled with an inert gas produced by an inert gas generator which causes the carbon media to be regenerated. The inert gas strips the carbon media of contaminates and is then delivered to a ground flare. The carbon media is returned to the adsorber tank and re-used to treat bio-gas.

Abstract: An air purification system comprises a chamber having an air inlet and an air outlet, a plurality of flexible wires hanging from a ceiling of the chamber, a spray mechanism configured to spray droplets in the chamber, and a sound wave generator configured to generate a standing sound wave in the chamber. During operation of the air purification system, the plurality of flexible wires are elastically deformed by the standing sound wave generated by the sound wave generator such that portions of the plurality of flexible wires converge at nodes of the sound wave, and also the droplets move to the nodes of the standing sound wave, while trapping particles in the air during the movement to the nodes. The droplets collide against and are adsorbed to the plurality of flexible wires at the nodes of the sound wave.

Abstract: The present invention relates to a portable pressure swing adsorption (“PSA”) oxygen generator with at least one partition board disposed inside its housing; an oil-free compressor and a control valve assembly are disposed in one of the separated space isolated by at least one fixing board and the at least one partition board; wherein a fan is disposed inclined or vertically on the partition board outside of the isolated space so that air can be blown into the isolated space directly by an air outlet of the fan. The present invention is built in compact structure with small size and light weight to carry and move, and works safely with a choice of three different types of power supplies, which enable the oxygen generator of the present invention to be used more widely than conventional ones.

Abstract: A multi-chamber canister for a pressure swing absorption system within a general housing assembly. The chambers include a first molecular sieve chamber for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas and at least a second molecular sieve chamber disposed within the housing assembly for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas component. Furthermore, a supply chamber is disposed within the housing for receiving air from the ambient environment and for communicating air to either first or second molecular sieve chambers.

Abstract: In a modular gas-separating adsorber assembly, a pair of cylindric vessels, filled-in by a given amount of an adsorbing material (either a mainly adsorbing or a mainly adsorbing material) are always operatively assembled with a top plate and a bottom plate, the top and bottom plates being mutually coupled by tie rods, engaged in the plate corners, the bottom plates and top plates forming plate chambers and being operatively connected with the chamber formed by adjoining cylindric vessel, the plates having projecting fittings to be assembled with the plate chambers included in adjoining vessels.

Abstract: A system and a method are described for monitoring pressure imbalances in the adsorbent beds of a portable gas concentrator. Using the programmability features found in modern portable concentrators, various mitigative procedures to adjust for pressure imbalances and to predict the need for service are disclosed.

Abstract: A gas separation vessel has a vessel shell and a partition therein. A first bed support is mounted between the partition and the shell, and a second bed support is mounted within the partition to define a second bed space. First and second ports on the vessel shell beneath the bed supports permit gas flow between the bed spaces and the exterior of the vessel shell. A separation medium is placed in the bed spaces. A feed gas is introduced into the vessel to flow through the first bed and then through the second bed to separate at least one component of the feed gas from the other intermixed gases. Output gas is then collected from the vessel. The vessel may have a L:D ratio of not more than 4:1.

Abstract: A radial flow reactor is disclosed for use in gas purification, separation or reaction processes and most suitably used in prepurification processes. The reactor has two concentric internal baskets which are rigidly supported at both the top and bottom ends of the reactor. The reactor has a removable section in the inner basket to accommodate rotating arms to dense load one or more layers of active materials between the concentric baskets.

Abstract: The present invention is directed to methods for removing CO2 from air, which comprises exposing sorbent covered surfaces to the air. The invention also provides for an apparatus for exposing air to a CO2 sorbent. In another aspect, the invention provides a method and apparatus for separating carbon dioxide (CO2) bound in a sorbent.

Abstract: A vacuum pressure swing absorption system provides portable oxygen to medical patients. A pair of sieve beds are alternately pressurized with air and evacuated by vacuum by coordinated operation of a selector valve and a vent valve. Product gas flows from both sieve beds through respective check valves to a product tank. An equalization valve is operated in coordination with the selector valve and the vent valve to open a flow path between the sieve beds and allow pressure to equalize therebetween. Operation of the vent valve is time to occur after pressure in the sieve beds has equalized. Components of the concentrator are tuned so that the equalization pressure occurs at about zero pounds per square inch (psi). This reduces energy loss due to free expansion of gasses and reduces noise created by the venting of gasses to the ambient atmosphere.

Abstract: A radially compliant scroll compressor includes a fixed scroll, an orbiting scroll operatively connected to the fixed scroll, a synchronizer and at least one linkage member operatively connected to the orbiting scroll and the synchronizer. The at least one linkage member includes an orbiting crank handle operatively disposed on the linkage member, a crankpin operatively disposed through said synchronizer and extending into the crank handle and a damping member disposed on the crankpin between the synchronizer and the crank handle.

Abstract: Systems and methods for initiating startup of PSA assemblies in hydrogen-processing assemblies, which may include a hydrogen-generation assembly and/or a fuel cell stack. The systems and methods include startup procedures that provide for pressurization of the adsorbent beds of the PSA assembly without the need for a stored quantity or other supply of purified hydrogen gas. The systems and methods additionally or alternatively include startup procedures that restrict or even prevent contamination of portions of the PSA assembly, hydrogen storage devices and/or accumulator tanks with an impure gas stream and/or decrease accumulation of the impure gas stream therein. This impure gas stream may be the mixed gas, reformate, or other gas stream that is intended to be purified by the PSA assembly when the PSA assembly is in its hydrogen-purifying operating state.

Abstract: A microtrap assembly includes a carbon nanotube sorbent. The microtrap assembly may be employed as a preconcentrator operable to deliver a sample to an analytical device to measure the concentrations of greenhouse gases. A system includes a microtrap having a carbon nanotube sorbent for measuring the concentrations of greenhouse gases in a sample.

Abstract: An oxygen concentrator comprises an oxygen reservoir and adsorbent columns that each have an inlet, an outlet, and a bed of adsorbent material. The concentrator also comprises an air inlet, an exhaust outlet, and a vacuum pump for pumping nitrogen rich gas from one of the column inlets to the exhaust outlet. A product control pump pumps oxygen rich gas from one of the column outlets to the oxygen reservoir. A control valve controls flow in and out of the columns by selectively connecting the air inlet to one column inlet, connecting the vacuum pump to another column inlet, and connecting the product control pump to a column outlet. A motor drives the vacuum pump and control valve to produce vacuum swing adsorption (VSA) cycles in which oxygen-rich product gas is separated and accumulated in the reservoir.

Abstract: A compact and highly portable combination pressure swing adsorption apparatus and product gas conservation device for medical use, to produce efficiently a gas with a high concentration of oxygen and to deliver the oxygen concentrated gas to a user at selectable times and in selectable doses, in which the operating components are detachably mounted together as a single unit.

Abstract: NO2 may be removed from a carbon dioxide feed gas comprising NOx and at least one “non-condensable” gas as contaminants by passing the feed gas at a first elevated pressure through a first adsorption system that selectively adsorbs at least NO2 to produce at least substantially NO2-free carbon dioxide gas. The adsorption system is at least partially regenerated using a carbon dioxide-rich gas recovered from the substantially NO2-free carbon dioxide gas after purification. The invention has particular application in removing NOx and water from flue gas generated by oxyfuel combustion.

Abstract: The present invention provides a method and an apparatus for condensing ozone arranged so as to efficiently take out the ozone gas of a predetermined concentration, although its construction is simple. The method for condensing the ozone gas comprises acting ozone-oxygen mixture gas on an adsorbing cylinder which is filled in its interior area with an adsorbent so as to selectively adsorb the ozone gas to an adsorbent and desorbing the selectively adsorbed ozone gas so as to condense and purify the ozone gas. The method further includes acting the ozone-oxygen mixture gas on the adsorbent in non-cooled state to selectively adsorb the ozone gas to the adsorbent and vacuuming the adsorbing cylinder on performing desorption-operation of the ozone gas to desorb the ozone gas from the adsorbent.

Abstract: This invention relates to an adsorbent system, adsorbent cartridge, and external canister for removing gaseous contaminants from air or another gas.

Abstract: An oxygen generator comprising a body shell, a top cover set, a bottom cover set, an air pump, multiple switching solenoid valves and a watering control set; the body shell is provided with multiple big tanks filled with molecular sieve substances, its surrounding is provided with a gas intake passage, multiple sets of airflow channels, multiple sets of gas outtake channels, a gas storage tank and an air filtration tank; the body shell is further provided with multiple switching solenoid valves, which control both the circulation between two adjoined airflow channels and the circulation between an airflow channel and an adjoined gas outtake channel; the top cover set and the bottom cover set are installed on the top side and bottom side of the body shell respectively, and the air pump is set up under the bottom cover, while the watering control set is set up on the bottom cover.

Abstract: The present disclosure provides a method for removing carbon dioxide from a gas stream without consuming excess energy, wherein a solid sorbent material is used to capture the carbon dioxide. The solid sorbent material may utilize a water-swing for regeneration. Various geometric configurations are disclosed for advantageous recovery of CO2 and regeneration of the sorbent material.

Abstract: In various implementations, various feed gas streams which include hydrogen and carbon monoxide may be processed for conversion to product streams. For example, the feed gas stream may be processed using the Fischer-Tropsch process or a methanol synthesis process. Unconverted hydrogen and carbon monoxide can be recycled at high recovery and/or inert components removed to prevent build-up in the recycle system by using an arrangement of pressure swing adsorption systems designed to recover impure product gas streams.

Abstract: A multi-channel circulation oxygen generator, comprising a body shell, a top cover set and a base set; the body shell is provided with at least two big tanks for loading molecular sieve substances at its internal, having a set of gas passage, a set of gas intake passage, a gas storage tank and a set of gas outtake passage at its surrounding, and providing with a plurality of orderly arranged heat dissipation ribs shaped at its outer surface; the top cover set caps the top side of the body shell, and its bottom side corresponding to the big tank is provided with filtration and one way barricading parts, connecting to the inside of the big tank; the base set joins the bottom of the body shell, having switching solenoid valves to control the big tanks for alternating between the intake and outtake of air.

Abstract: A modular and compact adsorbent bed structure is disclosed for use in an adsorption-based gas separation plant. The conventional adsorbent bed in a gas separation plant is replaced with a plurality of modular adsorbent bed units connected to make the adsorbent bed structure. Modular adsorbent bed units of this invention provide higher capacity of product per unit volume of adsorbent material (i.e., increased adsorbent utilization) as compared to that obtained from conventional adsorbent beds. The modular design requires lower fabrication costs; is easier to transport; has less maintenance and repair requirements; and is easier to load with adsorbent material.

Abstract: Concentrated oxygen product gas is produced and delivered to a patient. Product gas is produced by (a) introducing ambient air into a first end of a column containing an adsorbent material that preferentially adsorbs nitrogen and removes oxygen-rich product gas out a second end of the column; (b) evacuating the column through the first end to remove adsorbed gas from the column; (c) repressurizing the column by introducing ambient air into the first end of the column until the column is near 1.0 atmosphere; and (d) repeating steps (a)-(c). Product gas is delivered as needed to the patient.

Abstract: The invention concerns a self-propelled vehicle, in particular an aircraft, comprising an onboard equipment such as an inerting system, means for vapour pollutant filtering (1) arranged between an air intake (8) connected to a compressed air source and an air outlet (9) connected to the equipment. The invention is characterized in that the vapour pollutant filtering means (1) comprise adsorption filtering means such as molecular sieve and/or activated carbon.

Abstract: Embodiments of oxygen concentrators having a sieve bed that includes a vessel filled with a separation medium are disclosed. The sieve bed vessel at least partially supports one chassis component of the oxygen concentrator with respect to another chassis component. of the oxygen concentrator.

Abstract: A carbon nanotube filter. The filter including a filter housing; and chemically active carbon nanotubes within the filter housing, the chemically active carbon nanotubes comprising a chemically active layer formed on carbon nanotubes or comprising chemically reactive groups on sidewalls of the carbon nanotubes; and media containing the chemically active carbon nanotubes.

Abstract: A multi-chamber canister for a pressure swing absorption system within a general housing assembly. The chambers include a first molecular sieve chamber for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas and at least a second molecular sieve chamber disposed within the housing assembly for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas component. Furthermore, a supply chamber is disposed within the housing for receiving air from the ambient environment and for communicating air to either first or second molecular sieve chambers.

Abstract: An oxygen generating system includes an oxygen generating unit including a housing having disposed therein i) at least two sieve beds, ii) a piston disposed between and operatively connected to the sieve beds, and iii) at least one magnet operatively disposed on the piston. A coil is wrapped around an exterior surface of the housing and is in operative communication with the magnet(s). The coil is configured to drive the piston along a length of the housing between the sieve beds during at least one stage of an oxygen generating cycle. The driving of the piston is accomplished via an electromagnetic field formed between the coil and the magnet(s). Also disclosed herein is a method for generating an oxygen-enriched gas using the oxygen generating system.

Abstract: An improved gas separation PSA process, more particularly for oxygen production, utilizing adsorbents of Type X characterized by high frequency (i.e., cycle times of less than 4 s), bed length to square of mean particle diameter ratio within 200 to 600 mm?1, bed size factor of less than 50 lb/TPDO. The bed length, mean particle size, and cycle time are selected in a range such that axial dispersion becomes an important factor. In this way, low product recovery and high pressure drop (high power consumption) disadvantages often associated with the use of small particles are overcome.

Abstract: To a canister assembly to be installed in a vehicle body having a differential device mounted on a rear part thereof without reducing the space above a floor panel while ensuring an adequate adsorption chamber volume. The canister assembly (22) comprises a first adsorption chamber (31) for adsorbing fuel vapor introduced from a fuel tank (8); a second adsorption chamber (32) for adsorbing fuel vapor introduced from the first adsorption chamber; and a chamber communication pipe (46) for communicating the first adsorption chamber with the second adsorption chamber; wherein the first adsorption chamber and second adsorption chamber are provided separately from each other on either side of the differential device.

Abstract: An oxygen concentrator comprises a plurality of adsorbent columns, each having an inlet, an outlet and abed of adsorbent material. The oxygen concentrator also includes a vacuum pump for removing separated nitrogen rich gas from the column inlets, a control valve for controlling flow of fluids in and out of the columns, and a breakthrough sensor for signaling the position of a mass transfer zone (MTZ), the breakthrough sensor controlling operation of the control valve as a function of the breakthrough sensor signal. An electric control module (ECM) receives the signal from the breakthrough sensor, and adjusts the control valve based on the signal.

Abstract: A system and a method are described for monitoring pressure imbalances in the adsorbent beds of a portable gas concentrator. Using the programmability features found in modern portable concentrators, various mitigative procedures to adjust for pressure imbalances and to predict the need for service are disclosed.

Abstract: A method is disclosed for distributing a plurality of fluid which flows through a plurality of chambers and an apparatus for performing this method, which comprises a first fluid flow distribution device (2), with no mixing feature, having a first plurality P of inlet/outlet lines (31, 32, 33, 34) opposite a second plurality N of inlet/outlet lines (41, 42, 43, 44, 45, 46, 47, 48), where N?P, said first distribution device (2) selectively connecting each of said lines of said second plurality N of lines (41, 42, 43, 44, 45, 46, 47, 48) with one of said lines of said first plurality P of lines (31, 32, 33, 34), said first distribution device (2) being adapted for simultaneous intermittent and sequential switching of the connection between all of said N lines of said second plurality of lines with all of said P lines of said first plurality of lines, to sequentially provide N different possible inlet/outlet patterns; a second fluid flow distribution device (6), said second distribution devices (6) have a synchr

Abstract: Pressure swing adsorption process for the separation of a feed gas mixture comprising (a) providing a pressure swing adsorption system comprising one or more composite beds, each composite bed comprising adsorbent material disposed in two or more vessels in parallel flow configuration, each vessel having a feed end and a product end; (b) performing cyclic sequential steps comprising adsorption/make product, withdrawing gas at decreasing pressure from the composite bed, purging the composite bed, and introducing gas into the composite bed at increasing pressure; and (c) for any of the sequential steps, setting a flow rate or flow rates of one or more gases selected from the group consisting of gas introduced into or withdrawn from the feed end or ends of any of the two or more vessels and gas introduced into or withdrawn from the product end or ends of any of the two or more vessels.

Abstract: A rotary cylinder valve comprises a valve body, a valve cylinder rotationally mounted within the valve body, and first, second, third and fourth valve seats coupled to the valve body. The valve cylinder has a first position in which dual independent flow paths connect the first valve seat with the second valve seat, and connect the third valve seat with the fourth valve seat. The valve cylinder is rotatable to a second position in which the dual independent flow paths connect the first valve seat with the fourth valve seat, and connect the third valve seat with the second valve seat. The valve seats form seals against the valve cylinder, such that no flow path connects the first valve seat with the third valve seat.

Abstract: The present system is an adsorption system (100) for separating air into a concentrated gas component, which has an air supply, a compressor (115) for receiving and compressing the air supply, providing a compressed air supply, and molecular sieve material for separating the compressed air supply into a concentrated gas component. The adsorption system delivers at least 5 liters per minute (LPM) of concentrated gas component from the molecular sieve material in which the system has a specific total weight per LPM<9 lbs/LPM. Additionally, an output quantity of the concentrated gas is delivered by the adsorption system and a purging quantity of the concentrated gas is dispensed into a sieve chamber of the adsorption system undergoing a purge cycle. The purging quantity has a value equal to or less than the difference between the maximum quantity and the output quantity, and the purging quantity is controlled based on the output quantity.

Abstract: An on-board oxygen generating system is provided, which includes an air supply duct, a breathing gas duct, and an oxygen generator fluidly coupled between the air supply duct and the breathing gas duct. The oxygen generator is configured to enrich the oxygen content of air flowing from the air supply duct to the breathing gas duct. A drain valve assembly is fluidly coupled to the air supply duct and configured to move between: (i) an open position wherein condensation may drain from the air supply duct, and (ii) a closed position.

Abstract: A portable oxygen concentrator includes a pair of sieve beds, a compressor for delivering air to the sieve beds, a reservoir receiving oxygen-enriched gas from the sieve beds, and an air manifold attached to the first ends of the sieve beds. A set of valves operate under the control of a controller for selectively opening and closing the valves to alternately charge and purge the sieve beds to deliver oxygen-enriched gas into the reservoir. In addition, an exhaust passage communicates with the plurality of sieve beds to deliver a flow of nitrogen evacuated from the sieve beds such that the flow of the nitrogen is directed at or across the controller to cool the controller.

Abstract: Disclosed is a fuel filter for removing sulfur containing compounds from an internal combustion fuel stream. In one embodiment, the fuel filter comprises at least one column comprising an adsorbent. In one exemplary embodiment the adsorbent is capable of removing sulfur containing compounds, especially sulfur containing aromatic compounds, from fuels used in internal combustion engines, especially diesel fuels. Also disclosed is an apparatus for extending the life cycle of a post combustion emission control device. In one exemplary embodiment, the apparatus comprises a fuel filter for removing sulfur containing compounds from an internal combustion fuel stream and an emission control device. Finally, a method for removing sulfur containing compounds from an internal combustion fuel stream is disclosed.

Abstract: A multi-chamber canister for a pressure swing absorption system within a general housing assembly. The chambers include a first molecular sieve chamber for receiving a first molecular sieve for separating air from the ambient environment into a concentrated gas and at least a second molecular sieve chamber disposed within the housing assembly for receiving a second molecular sieve for separating air from the ambient environment into a concentrated gas component. Furthermore, a supply chamber is disposed within the housing for receiving air from the ambient environment and for communicating air to either first or second molecular sieve chambers.

Abstract: Disclosed herein, without limitation, are activated carbon honeycomb catalyst beds and systems for removing mercury and other toxic metals from a process stream, i.e, from flue gas of a coal combustion system. The activated carbon honeycomb can for example remove greater than 90% mercury from flue gas with a simple design and without adding material to the flue gas. Also disclosed herein, and without limitation, are methods for manufacturing and using the disclosed honeycomb catalyst beds and systems.

Abstract: A method of providing concentrated oxygen product gas to a patient. The method comprises producing product gas by a vacuum swing adsorption (VSA) process with an oxygen concentrator comprising a plurality of separation columns connected to a vacuum source driven by a motor. Separated product gas is then pumped to a product reservoir. The pressure of the reservoir is monitored and used to adjust the speed of the motor based on the reservoir pressure. The separated gas is then delivered to the patient.