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 evaporated fuel treating device lowers the blow-by volume of evaporated fuel emitted to the atmosphere via a casing having an atmospheric port. The casing has in series a first adsorbent chamber housing an adsorbent material, a space chamber not housing an adsorbent material and a second adsorbent chamber housing an adsorbent material. Each of the chambers is positioned beside an adjacent chamber thereof. The first chamber is disposed closest to the atmospheric port among the adsorbent chambers. An end part of the space chamber on a side of the first chamber has a first partition wall having an opening part with a plurality of first openings provided on a top side of the first partition wall. A current plate has one end positioned between the adjacent first openings and a surface and a rear face of the current plate are disposed along the top and bottom direction.

Abstract: A fluid filter for preventing the introduction of fluid contaminants into an associated device is disclosed. The filter has a housing having an inlet chamber and an outlet chamber. The inlet chamber forms an inlet port of the fluid filter and the outlet chamber forms an outlet port of the fluid filter. A number of serially connected intermediate chambers are coupled between the inlet chamber and the outlet chamber. Each of the chambers contains an absorbent material for capturing the fluid contaminants and generally preventing their introduction into the associated device.

Abstract: The disclosure provides methods and systems for sequestering and/or reducing sulfur oxides, nitrogen oxides and/or carbon dioxide present in industrial effluent fluid streams. A solid particulate material comprising a slag component, a binder component (distinct from the slag component), and optionally water is formed and then contacted with the effluent fluid stream to reduce at least one of the sulfur oxides, nitrogen oxides, and/or carbon dioxide. The contacting of the effluent stream may occur in a packed bed reactor with the solid dry particulate material. Methods of reducing pollutants from exhaust generated by combustion sources, lime and/or cement kilns, iron and/or steel furnaces, and the like are provided.

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 invention relates to a method for achieving low oxygen levels in a natural gas stream without the use of a catalytic system. In one embodiment, the method comprises: membrane treatment for the removal of the bulk of CO2 and oxygen in the natural gas feed and the addition of a PSA system using a carbon molecular sieve adsorbent for the adsorption of residual oxygen.

Abstract: This specification discloses a radial flow continuous reaction/regeneration apparatus. Through employing a rotary device to individually and annularly distributing process fluid and regeneration fluid into a stationary segmented reaction/regeneration box and receiving effluents individually and annularly from the same stationary reaction/regeneration box, the mentioned radial flow continuous reaction/regeneration apparatus can be operated continuously and efficiently without the need for shutting down for regeneration. This radial flow continuous reaction/regeneration apparatus is not only used to separate components by adsorption, such as dehumidification, but also is used in chemical processes to carry out catalytic reaction, regenerate catalyst and used as filtration device to trap particles by changing the filler in the stationary reaction/regeneration box.

Abstract: A method of manufacturing and assembling a carbon canister for a fuel vapor management system of a vehicle includes injection molding a housing partially defining a first chamber, a second chamber, a third chamber, and a baffle. The housing includes a first wall defining an interface between the first and second chambers and a second wall with a portion of the second wall defining an interface between the second chamber and the baffle with apertures proximate a first side of the housing. The method may include injection molding first and second retention plates, filling first, second, and third chambers with carbon pellets, installing the first retention plate into the second side of the housing proximate the first and second chambers to enclose the carbon pellets, and installing the second retention plate into the second side proximate the third chamber to enclose the carbon pellets in the third chamber.

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: An adsorbent canister includes a casing defining a first adsorption chamber, a second adsorption chamber and a diffusion chamber therein, and an adsorbent capable of adsorbing the fuel vapor and filled in the first adsorption chamber and the second adsorption chamber. The first adsorption chamber and the second adsorption chamber communicate with each other via the diffusion chamber. The casing has on a side wall thereof a fuel introducing port configured to introduce fuel vapor into the first adsorption chamber and an air communicating port configured to introduce air into the second adsorption chamber. The diffusion chamber has at least one of a first diffusion chamber and a second diffusion chamber. The first adsorption chamber is positioned above the first adsorption chamber and extends over the entire length of the first adsorption chamber. The second diffusion chamber is positioned below the second adsorption chamber and extends over the entire length of the second adsorption chamber.

Abstract: A room temperature trap for the purification and concentration of gaseous methane. The trap utilizes the adsorption and desorption properties of microporous spherical carbon molecular sieves to purify and concentrate radiolabelled methane for application in an automated synthesis module without the need for cryogenic cooling.

Abstract: A four-pass carbon canister includes a cover sealingly coupled to an injection-molded housing having a first chamber, a second chamber fluidly coupled to the first chamber, a baffle fluidly coupled to the second chamber, and a third chamber fluidly coupled to the baffle. The three chambers are filled with carbon pellets to absorb carbon pellets provided to the carbon canister from the fuel tank. The carbon canister is periodically purged by drawing fresh air into the carbon canister, with the fresh air desorbing the hydrocarbons and then provided to and consumed in an internal combustion engine.

Abstract: The invention relates to a method for purifying a feedstock gas flow including a main compound, water (H2O) and carbon dioxide (CO2) as well as so-called secondary impurities, that comprises: a) feeding the feedstock gas flow into at least one 2-grid radial adsorber comprising as a single adsorption bed an activated alumina or silica gel bed on which H2O is preferably adsorbed; b) feeding the gas resulting from step a) into at least one 2-grid radial adsorber comprising as a single adsorption a molecular sieve bed on which CO2 and secondary impurities are preferably adsorbed; and c) recovering a gas resulting from step b) enriched with the main compound and suitable for cryogenic distillation.

Abstract: A motor vehicle has a filter device for purifying untreated gases. The filter device has a filter housing and at least one filter element, in particular an adsorber element, which is arranged therein, with an auxiliary filter that is positioned outside and above the filter housing being provided. The auxiliary filter, which is disposed in an auxiliary filter housing, has at least one auxiliary filter element which is connected in a communicating fashion to and in series with the filter element in the filter housing.

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. The modular design requires lower fabrication and maintenance costs; is easier to transport; and is easier to load with adsorbent material.

Abstract: A fluid purifier includes an enclosure provided with an inlet and an outlet, and a plurality of different carbon based purifying media disposed within the enclosure which are capable of removing different contaminants. In a non-limiting embodiment, the purifier includes three carbon-based materials ordered according to a specific sequence. In an aspect of the non-limiting embodiment, the material closer to the purifier inlet may include acid-impregnated carbons, the centrally-located material may include base-impregnated carbons, and the material closer to the outlet may include activated carbons.

Abstract: An air filter that includes a primary filter and a polishing filter. The primary filter comprises a monolith 10 that contains active-particulate. The air-to-be-filtered travels through the primary filter in a path generally parallel to the passageways 12. The polishing filter 36 has first and second major surfaces and also contains active-particulate. The polishing filter is generally arranged such that air travels from the first major surface to the second major surface when passing through it. The inventive filter demonstrates extraordinary performance over the same primary and polishing filters taken individually.

Abstract: A vaporized fuel treatment apparatus having comprising a first adsorbent having a honeycomb structure capable of adsorbing and desorbing vapor contained in fuel evaporation gas, a case configured to house the first adsorbent therein, and a holding device configured to elastically hold the first adsorbent within the case. The first adsorbent has a circumferential surface and at least one end surface intersecting with the circumferential surface at a corner portion. The holding device comprises a holding member having a first portion and a second portion configured to contact with the circumferential surface and the at least one end surface, respectively. The holding member does not contact with the corner portion of the first adsorbent. The vaporized fuel treatment apparatus can include a sealed container disposed in a canister for controlling temperature alteration in the canister.

Abstract: The invention concerns a desiccant box for dehumidifying air, with a cylindrical outer housing (10), a lid (11) that closes the outer housing, and an inner housing (12) to accommodate desiccant (13). The lid (11) features at least one inflow opening (14) and at least one outflow opening (15), the contour of the outer housing opposite the lid being curved. Moreover, another inner housing (17) is provided which is located in the area of the contour (16) and runs approximately along this contour, this inner housing being also filled with desiccant (18), and the two inner housings (12 and 17) being connected to each other.

Abstract: An apparatus for separation of gases from ambient air that has at least one separation column with an inlet at a first end and an outlet at a second end, a buffer column having a single inlet at a first end, a vacuum pump, and a valve system that connects the vacuum pump to the outlet at the first end of the separation column, and that connects the outlet at the second end of separation column to the single inlet at the first end of the buffer column.

Abstract: Disclosed are a pressure swing adsorption apparatus for hydrogen purification and a hydrogen purification method using the same. The pressure swing adsorption apparatus for hydrogen purification includes a plurality of adsorption columns connected with a feed supply pipe, a hydrogen storage tank for collecting purified hydrogen from the adsorption columns, and valves for opening or closing a plurality of pipes connected to the respective adsorption columns, and the adsorption columns are packed with adsorbent beds of active alumina or silica gel, activated carbon, zeolite 13X, zeolite 5A, and a carbon monoxide-selective adsorbent other than the zeolite 5A, in order to remove carbon dioxide, methane, and carbon monoxide from a hydrogen-containing gas mixture supplied through the feed supply pipe, and the content of carbon monoxide in the discharged hydrogen is minimized through sequential adsorption on the adsorbents in the adsorption columns.

Abstract: A scrubber that employs a dry chemical medium includes a first vessel defining a first cavity. A second vessel adjoining the first vessel defines a second cavity, and the first and second cavities combine to form a common chamber. A fan draws a gaseous stream into the chamber at a first location and extracts the gaseous stream from the chamber at a second location. A plurality of partitions extend substantially from the upper end of the chamber to the floor. A dry chemical medium is disposed within the spaces between the partitions for neutralizing a pollutant in a gaseous stream. The partitions have openings of a sufficiently large size to permit gas to flow therethrough but of a sufficiently small size to prevent the dry chemical medium from passing therethrough. A method for converting a wet scrubber to a dry scrubber of the type described is also disclosed.

Abstract: An automatic selector valve including a box body having an internal space portion, framed partition plates separating the space portion into four rooms, each framed partition plate having an opening portion, plate-shaped turnable valve bodies opening or closing the opening portions of the framed partition plates, an inflow port letting a gas flow in, an inflow/outflow port letting a gas flow in and flow out alternately, an outflow port letting a gas flow out through, and an inflow/outflow port letting a gas flow in and flow out alternately with the port, the ports provided in the separated four rooms, and a driving mechanism turning the plate-shaped turnable valve bodies about a rotation shaft.

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: A CO2 control device and method for capturing CO2 from fluid flow, including: a flow-through apparatus and an CO2 absorbing filter treated with an alkaline material which is housed within the flow-through apparatus. The flow-through apparatus receives fluid flow and the CO2 from the fluid flow is absorbed by the CO2 absorbing filter. The absorbed CO2 is converted into CaCO3 which is combined with volcanic ash to form a useful cement material.

Abstract: A multiple-stage granular moving bed apparatus comprises a first integrated moving bed unit, a second integrated moving bed unit and at least one granular material. The first integrated moving bed unit, having a first inlet part for providing a raw gas flowing therein, a first outlet part for providing a partially cleaned gas flowing thereout, and a plurality of first flow-corrective elements disposed therebetween for defining two channels. The second integrated moving bed unit, coupled to the first integrated moving bed unit, having a second inlet part for providing the partially cleaned gas flowing therein, a second outlet part for providing a completely cleaned gas flowing thereout, and a plurality of second flow-corrective elements disposed therebetween for defining two channels. The at least one granular material flows through the two channels respectively and then passes through the two channels respectively.

Abstract: A gas adsorption medium and an adsorption pump apparatus having the same are provided. The gas adsorption medium includes a multi-layered structure of which the layers formed of a material are spaced apart from each other, wherein an ion valence of the material is variable and the material includes extra electrons not participating in a chemical bond, and the adsorption pump apparatus includes the gas adsorption medium as described above. The gas adsorption medium can secure a large surface area by securing a space between the layers so that efficiency of the gas adsorption ability can be enhanced.

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: 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 canister device includes a main canister, a sub-canister, and a hose. The main canister includes a charging port, a purging port, and a main canister-side connection port. The sub-canister is separated from the main canister and located on a side of the main canister, and includes a drain port opened to the atmosphere and disposed on the same side as the main canister-side connection port of the main canister and a sub-canister side connection port disposed on the opposite side from the drain port. The hose provides fluid communication between the main canister-side connection port and the sub-canister-side connection port.

Abstract: Plate systems and methods of using them. The plate systems may be used, for example, for the removal of metallic or semi-metallic contaminants from a fluid stream.

Abstract: An air-cleaner includes a housing attached to an induction system of an internal combustion engine. The air-cleaner includes a filter element located within the housing and separating the internal of the housing into a dust side and clean side, the dust side having an introduction portion for introducing an external air into the housing, the clean side having a feeder portion for feeding a filtered air to an engine. The air-cleaner includes a plate-shaped adsorption element including an adsorbent to adsorb a vaporized fuel returned from an engine side and permitting an air to pass therethrough, the adsorption element arranged to cross the direction of an air flow and fitted to occupy the entire surface of the clean side in the housing. The adsorption element defines a port connecting the filter element and the feeder portion, and includes a valve disc to open or close the port. The valve disc is controlled to open during air inspiration for permitting an air to flow toward the feeder portion.

Abstract: A method and apparatus for improving air quality within an enclosed space. The apparatus provides at least three molecular sieves that contain zeolite material to treat the air to remove toxins such as suspended particles, carbon dioxide, carbon monoxide, nitrogen dioxide, bacteria, formaldehyde, total volatile organic compounds, radon, ozone, toxic mould and organic odor-causing compounds. The apparatus uses the sieves such that one of the sieves is locked and retaining air, substantially immobile within, for a period of not less than 2 seconds to allow the zeolite material to breakdown the compounds and release the individual natural elements.

Abstract: An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen separator for ambulatory use.

Abstract: A porous filter medium forms a filter or liner for extracting hydrocarbons from vapors emitted from a motorized vehicle, device or appliance fuel tank. The filter medium is a polymer network of a foam, nonwoven or collection of particles and has fine pore size and a butane working capacity (W/W %) of 4.0 percent or higher.

Abstract: Disclosed is a method and a filter unit for depleting or enriching a liquid or gas with substance(s) comprising i) providing a filter unit comprising at least one convective layer and at least one receiving layer adjacent one another, ii) passing the liquid or gas through the filter so that the main direction of flow is along the layers and the main flow of liquid gas is in the convective layer, allowing the substance(s) to: a) be transferred from a convective layer to a receiving layer, and b) be retained or otherwise modified or transferred within a receiving layer, or c) be provided by the receiving layer, and d) be transferred from the receiving layer to the fluid in the convective layer.

Abstract: An apparatus for separating humidity from a pressurized feed gas is provided the apparatus having a housing; an intake path formed at a first end of the housing; a centrifugal device disposed within the housing; a sieve bed disposed within the housing; an outlet path formed at a second end of the housing; a purge path formed below the intake path; and a water sump zone located within the housing below the centrifugal device. The centrifugal device receives the feed gas from the intake path during a charge phase and directs the feed gas in a centrifugal pattern to cause water vapor in the feed gas to condense into water droplets on the inner wall. The water droplets are discharged from the housing through the purge path with an exhaust gas during a purge phase.

Abstract: Filtering medium based on activated carbon which is characterized in that it comprises three superposed layers, respectively an inner layer and two outer layers, the inner layer consisting of 80 to 95% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, the first outer layer comprising from 45 to 95% by dry weight of organic and/or inorganic chemical fibres, the balance for 100% consisting of activated carbon and/or of a material having a density of less than 0.9, the second outer layer comprising from 5 to 25% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, and in that the weight of the inner layer is between 40 and 200 g/m2 and the weight of the outer layers is between 10 and 100 g/m2.

Abstract: A plant (100) includes a gas turbine (110) that receives a feed gas (130), wherein a metal plates from a metal carbonyl contained in the feed gas onto a sacrificial metal (152A) in an adsorber (150A), and wherein the feed gas in the adsorber has a temperature sufficient for plating the metal onto the sacrificial metal.

Abstract: A motor vehicle has a filter device for purifying untreated gases. The filter device has a filter housing and at least one filter element, in particular an adsorber element, which is arranged therein, with an auxiliary filter that is positioned outside and above the filter housing being provided. The auxiliary filter, which is disposed in an auxiliary filter housing, has at least one auxiliary filter element which is connected in a communicating fashion to and in series with the filter element in the filter housing.

Abstract: A porous metal denuder has a cascade impactor to collect aerosol particles of different diameters, two porous metal discs downstream to collect basic and acidic gases, respectively, and a final filter to collect particles smaller than the cut diameter of the last stage of the cascade impactor which will penetrate the two porous metal discs.

Abstract: A scalable technology for purifying ethanol, wherein the vaporization of ethanol is coupled with a chromatographic rectification process comprising feeding a vaporized ethanol/water mix onto a plurality of molecular sieve beds to produce dehydrated ethanol vapor, which can then be condensed to recover purified dehydrated ethanol liquid. The scalable technology process is suitable for farm-scale production of fuel-grade ethanol, having the added benefit of allowing wet distillers grains to be used on-site as live-stock feed. By reducing energy requirements, costs and pollution, the output can be scaled to produce fuel-grade ethanol at quantities of anywhere from about 1000 gallons per year to upwards of hundreds of millions of gallons per year. Particularly beneficial versions utilize a plurality of smaller molecular sieve beds in series and use heat generated during desorption and regeneration of the molecular sieve beds as an energy source to aid in the vaporization step.

Abstract: There is provided a gas separation apparatus for separating a specified gas from a gas to be treated containing a plurality of gases. The gas separation apparatus includes a plurality of serially-connected separation units that separate the specified gas from other gases by using a column, and a suction unit that controls an inside of the column to a reduced pressure. At least two of the plurality of separation units differ from each other in at least one separation condition.

Abstract: A method and an apparatus for controlling airflow in a desiccant drying system having a plurality of desiccant beds, in which each desiccant bed is located in a chamber, and multi-position valves can be operated to cause the gas to be dried to flow in a serial manner through a plurality of desiccant bed chambers while another desiccant bed is isolated from the gas flow and undergoing regeneration. Once regenerated, the multi-position valves are repositioned to establish a new serial flow gas path in which the freshly regenerated desiccant bed becomes the final bed in the series, and another bed undergoes regeneration.

Abstract: Systems and methods for processing methane and other gases are disclosed. A representative method in accordance with one embodiment includes directing a first portion of a gas stream through a first adsorbent while exchanging heat between a second adsorbent and a third adsorbent. The method can further include directing a second portion of the gas stream through the third adsorbent while exchanging heat between the first and second adsorbents. The method can still further include directing a third portion of the gas stream through the second adsorbent while exchanging heat between the first and third adsorbents. In further particular aspects, the adsorbent can be used to remove carbon dioxide from a flow of methane. In other particular aspects, a heat exchange fluid that is not in direct contact with the adsorbents is used to transfer heat among the adsorbents.

Abstract: The invention relates to the filter for removing of physical and/or biological impurities from the filtrated media containing the textile fibres. The filter contains at least one couple (L) of nanofibrous layers, out of which in the direction of passage of the filtrated media the first nanofibrous layer is an active nanofibrous layer (2) formed of polymeric nanofibres containing particles of at least one low molecular substance active against the removed biological impurity or removed biological impurities, and the second nanofibrous layer is represented by the filtration nanofibrous layer (3) formed of polymeric nanofibres, while the size of gaps for passage of filtrated media between nanofibres of the filtration nanofibrous layer (3) is smaller than the size of gaps for passage of filtrated media between nanofibres of active nanofibrous layer (2) and smaller than the size of elements of biological impurity or biological impurities removed by means of this filtration nanofibrous layer (3).

Abstract: A filter assembly configured to be incorporated into an exhaust treatment device, the filter assembly comprising: a plurality of channel frames secured to each other, each channel frame defining a perimeter for supporting a filter element, the perimeter surrounding a portion of the filter element.

Abstract: A pressure swing adsorption (PSA) including a first PSA module having a first manifold, a second manifold, and a plurality of pressure vessels extending between the first manifold and the second manifold. The unit further includes at least one support member attached to one of the manifolds and configured to provide rigidity thereto. The support member is preferably made of a material different from the manifold to which it is attached. The PSA unit can also include a structure for clamping the plurality of pressure vessels between the first manifold and the second manifold without imposing a bending moment to the vessels.

Abstract: An air-cleaner includes a housing attached to an induction system of an internal combustion engine. The air-cleaner includes a filter element located within the housing and separating the internal of the housing into a dust side and clean side, the dust side having an introduction portion for introducing an external air into the housing, the clean side having a feeder portion for feeding a filtered air to an engine. The air-cleaner includes a plate-shaped adsorption element including an adsorbent to adsorb a vaporized fuel returned from an engine side and permitting an air to pass therethrough, the adsorption element arranged to cross the direction of an air flow and fitted to occupy the entire surface of the clean side in the housing. The adsorption element defines a port connecting the filter element and the feeder portion, and includes a valve disc to open or close the port. The valve disc is controlled to open during air inspiration for permitting an air to flow toward the feeder portion.