Abstract: An adsorbent canister has a housing defining an adsorption chamber therein, an adsorbent filled in the adsorption chamber, and a honeycomb core. The honeycomb core is made from a material having a higher thermal conductivity than the adsorbent, defines therein a plurality of cells passing through the honeycomb core and is disposed in the adsorption chamber. The adsorbent canister can further have a heater for heating the honeycomb core or the honeycomb core can be made from a material, which produce heat when current is applied.

Abstract: A fuel tank deaeration and aeration system, including a first main filter device having an inlet and an outlet, wherein the inlet is in fluid communication with a fuel tank; and a second additional filter device having an inlet and an outlet, wherein the inlet is in fluid communication with the outlet of the main filter device, and the additional filter device outlet is in fluid communication with an environment of a vehicle, and wherein a bypass valve controls a bypass, which bypasses the additional filter device.

Abstract: A carbon nanotube filter, a use for a carbon nanotube filter and a method of forming a carbon nanotube filter. The method including (a) providing a carbon source and a carbon nanotube catalyst; (b) growing carbon nanotubes by reacting the carbon source with the nanotube catalyst; (c) forming chemically active carbon nanotubes by forming a chemically active layer on the carbon nanotubes or forming chemically reactive groups on sidewalls of the carbon nanotubes; and (d) placing the chemically active nanotubes in a filter housing.

Abstract: Hydrogen can be recovered in a refinery network using a combination of a cycling adsorber unit and a membrane separation unit. A membrane separation unit can be used to generate at least a portion of the purge hydrogen stream for the cycling adsorber unit. This can reduce the portion of the hydrogen product stream from the cycling adsorber unit required for regeneration of the adsorbent.

Abstract: An off gas extraction system provides superior results to other systems for cleaning polluted soil. Off gas is extracted, followed by compression and condensation. Compression and condensation produce an off gas further treated to produce pollutant-free exhaust. A regenerative adsorber cleans the influent gas/air by adsorbing residual chemical vapor and concentrates the removed chemical vapor and reprocesses them. Conventional scrubbers are used on the back end of the system to produce a final exhaust as prescribed by environmental regulation. Methods of accomplishing the same are likewise taught including combinations and additions consistent with schemes as they evolve.

Abstract: In a method of capturing carbon dioxide in a gas, carbon dioxide in a gas is adsorbed to the hybrid adsorbent prepared by mixing an adsorbent with iron oxide nanoparticles, microwaves are irradiated to the hybrid adsorbent and the carbon dioxide adsorbed to the hybrid adsorbent is desorbed from the hybrid adsorbent, and the carbon dioxide desorbed from the hybrid adsorbent is captured.

Abstract: The invention relates to a process and catalyst for the oxidative desulfurization of hydrocarbonaceous oil. In one aspect, solid carbon materials are provided having stable sulfur trioxide and nitrogen dioxide oxidative species on the surface thereof. Such materials are useful in the production of low sulfur hydrocarbon feedstocks and in the removal of refractory sulfur compounds.

Abstract: The present invention discloses a carbon dioxide capture power generation system provided with a boiler to combust a fuel in the oxygen atmosphere, a carbon dioxide capture equipment to remove carbon dioxide in the wake flow of the boiler, a piping branching from the wake flow of the boiler to recycle the combustion exhaust gas to the boiler, and a desulfurization equipment to remove sulfur oxides and a sulfuric acid removal equipment to remove a sulfuric acid gas in the upstream of carbon dioxide capture equipment and in the wake flow of the boiler.

Abstract: There is provided an air purifier having a dehumidification function, including: a body case having an inner space; a blower part installed in the inner space of the body case and drawing outside air from both sides of the body case through a single blower fan; an air purifying part purifying air drawn from one side of the body case; and a dehumidifying part removing moisture from air drawn from the other side of the body case by a dehumidifying rotor. Through the blower part drawing the air from both sides of the body case, the air purifier purifies the air drawn from one side of the body case and dehumidifies the air drawn from the other side of the body case. Accordingly, a drop in an airflow amount caused by concurrently performing the dehumidification and the purification may be alleviated, so improved dehumidification and purification effects are achieved.

Abstract: Several embodiments of the invention relate to systems and methods for removing compositions comprising dimethyl sulfoxide (DMSO) or related compounds, or odors associated with same. In several embodiments, the systems include activated carbon filters, adsorbents, odor adsorbing fabrics, masks, clean air members and clean air supply assemblies. Methods for reducing the concentration of a DMSO metabolite, or the odors associated with said DMSO metabolite are provided in some embodiments. In some embodiments the systems and methods facilitating the treatment of traumatic brain injury, ischemic stroke, atherosclerosis, spinal cord trauma, and neurodegenerative illnesses with compositions comprising DMSO.

Abstract: A ductless fume hood suitable for the removal of various chemical materials including toxic and non-toxic gases, vapors, particles, dust and unpleasant odors from a fluid stream. The ductless fume hood uses electronic devices and software to enable real time monitoring of gas levels in parts per million.

Abstract: A filter cartridge 12 that has a first and second layer of filter media 38, 40 that each have first and second major surfaces 32, 44 and a perimeter 46 and that each contain active particulate that is bonded together. A plenum 42 is disposed between the first and second layers of filter media 38, 40 such that the plenum 42 interfaces with the second major surface 44, 44? of each layer of filter media. A housing sidewall 30 extends from the first layer of filter media 38 to the second layer of filter media 40 and is secured to the perimeter 46 of the first and second layers of filter media. The first major surfaces 32, 32? of the first and second layers of filter media 38, 40 are each fluid permeable and are each in fluid communication with an exterior gas space. A filter cartridge 12 having such a construction provides a bifurcated flow pattern in a higher volume structure.

Abstract: A mixed gas containing monosilane is released from a semiconductor fabrication equipment. A pump unit suctions the mixed gas discharged from the semiconductor fabrication equipment and sends it out to a silane gas treatment unit provided at a stage subsequent to the pump unit. Argon gas is used as a purge gas of the pump unit. The silane gas treatment unit processes the mixed gas, containing at least hydrogen and monosilane, discharged from the semiconductor fabrication equipment via the pump unit. And the silane gas treatment unit separates and recover monosilane from the mixed gas so as to be recycled. Argon recovered by a noble gas treatment unit is used as the purge gas of the pump unit.

Abstract: A built in purifier for a cylinder of essentially nitrogen free gas having a low water content is provided with a molecular sieve 3A adsorbent to adsorb water from the gas, the 3A adsorbent having a particularly low adsorption capacity for nitrogen.

Abstract: The present invention provides a biological H2S removal system for the treatment of process gas, comprising: a housing that receives a process gas stream through a gas inlet, the housing comprising a plurality of layers through which the process gas stream flows while it is treated for H2S removal, and a gas outlet through which a treated gas stream exits; wherein air is added to the process gas stream prior to the process gas stream entering the housing.

Abstract: The present disclosure relates to methods and devices to detect perforation of the bowel, for example, resulting from surgical procedures, such as laparoscopy, diagnostic procedures, such as colonoscopy, medical conditions, such as diverticulitis, and trauma. The present disclosure also relates to filtration systems and electrical connector assemblies for use in the methods and devices.

Abstract: A method and system for coal-to-liquids (CTL) conversion is provided. The system includes a coal gasifier configured to partially oxidize a coal fuel stream to generate a flow of synthesis gas (syngas), a Fischer-Tropsch (FT) reactor configured to receive the flow of syngas and to generate a stream of tail gas, and an absorber coupled in flow communication downstream of the FT reactor and configured to receive the stream of tail gas. The absorber is further configured to generate a first flow including carbon dioxide, C2 hydrocarbons, and higher boiling gas components (C3+) and a second flow including C1, carbon monoxide, hydrogen, and nitrogen. The system also includes a first membrane separator including a selective membrane configured to separate the second flow from the absorber generating a permeate flow of hydrogen and a non-permeate flow of combustion turbine fuel gas including methane and hydrogen.

Abstract: An inline water trap including a filter component and a panel connector configured to interface with a patient gas monitor. In one embodiment the inline water trap indicates to the patient gas monitor that it is in place and that the patient gas monitor may begin intaking and analyzing the filtered patient sample. The inline water trap receives a patient sample and filters water and contaminants from the sample before allowing the remaining gas portion of the sample to pass through to the patient gas monitor, thereby protecting the patient gas monitor from damage. One embodiment of the inline water trap additionally contains an RFID tag to indicate to the patient gas monitor that the correct type of inline water trap is engaged.

Abstract: A purging apparatus for a storage chamber is disclosed. The purging apparatus is configured for establishing a purge gas flow through the storage chamber. The purging apparatus may include a gas purifier and a particle filter. The gas purifier may provide a purge gas to the storage chamber. The purge gas may flow through the storage chamber, and a mixture of the purge gas and potential contaminants may subsequently exit the storage chamber as exhaust gas. The particle filter may receive and filter the exhaust gas. The filtered gas may be provided to the gas purifier for purification and recirculation. The gas purifier may purify the filtered gas by substantially removing at least one of: an acid, a base, an organic compound, water or oxygen from the filtered gas. The purified filtered gas may then be recirculated and provided to the storage chamber as the purge gas.

Abstract: A device for adsorption treatment of a fluid or fluid stream, comprising a container for receiving adsorber material, wherein the container has a fluid inlet opening and a fluid outlet opening, and two fluid connection devices, wherein one of the fluid connection devices is provided at the fluid inlet opening and the other one of the fluid connection devices is provided at the fluid outlet opening, wherein the fluid connection devices are locked in a fluid-tight manner and are designed in such a way that they can each be connected to a fluid line connector and unlocked and, if they are connected to the respective fluid line connector they can be unlocked or are unlocked.

Abstract: A filtration system has a blowdown conduit and a filter unit. The blowdown conduit is adapted to be operably connected with a gas compressor station. The filter unit includes a filter housing, an inlet port, a pollution filter positioned within the filter housing to remove the pollutants from the vented gasses entering through the inlet port, and an exit port enabling the vented gasses to exit the filter housing once the pollutants have been removed by the pollution filter.

Abstract: A sieve module includes an impermeable housing and an adsorptive media bed. The impermeable housing is puncturable at a first puncture location to receive gas from an exterior of the impermeable housing. The impermeable housing is also puncturable at a second puncture location to expel gas to the exterior of the impermeable housing. The adsorptive media bed is disposed within the impermeable housing. The gas flows through the impermeable housing from the first puncture wound to the second puncture location by flowing through the adsorptive media bed.

Abstract: A filter for filtering a fluid in a substrate processing apparatus comprises first and second stages that are connected to one another. A delivery system provides a vaporized liquid to the filter. The first stage of the filter comprises a basic compound, and the second stage of the filter comprises a desiccant. A second filter comprises a permeation filter with permeable membrane to filter the fluid. Methods of filtering the fluid to reduce formation of undesirable process residues using the filter(s) are also described.

Abstract: Gas anti-diffusion assemblies are designed to slow, but not to block, the diffusion of a gas from or to an enclosed space to or from an open space, e.g., to slow the diffusion of air into or out of the housing for a hard disk drive from or out to the exterior of the housing. The assemblies typically have a laminate structure, i.e., are constructed of individual layers adhered or otherwise joined to one another in a stacked arrangement. The assemblies typically comprise alternating layers of polymeric film and adhesive with a mesh layer sandwiched or otherwise positioned within the assembly, and optionally comprises one or both of a filter layer and an absorbent layer.

Abstract: An air dryer cartridge 100 configured for use on both conventional air dryer systems having internal purge air valving and newer air dryer systems wherein at least some of the purge air valving is located in the cartridge. The air dryer cartridge 100 has a first connector 112 for mating with a corresponding connector of a conventional air dryer system, and a second connector 156 for mating with a corresponding connector of a newer-style air dryer system. When the cartridge 100 is installed on a conventional air dryer system, purge air valving 144/146 within the cartridge is deactivated causing the cartridge to act as a conventional air dryer cartridge. When the cartridge 100 is installed in a newer-style system, the purge air valving 144/166 within the cartridge is activated thus enabling the system to function as designed.

Abstract: The invention provides an adsorptive filtering material endowed with integrated particle and/or aerosol protection and with protective performance with regard to biological and/or chemical noxiants, in particular biological and/or chemical warfare agents, the adsorptive filtering material having a multilayered construction comprising a carrier layer, an adsorptive layer assigned to and preferably fixed to the carrier layer, and optionally a covering layer disposed on that side of the adsorptive layer that is remote from the carrier layer, wherein the adsorptive filtering material is additionally equipped with a particle and/or aerosol filtering layer which is preferably disposed between the adsorptive layer and the covering layer, wherein the particle and/or aerosol filtering layer is embodied as an air pervious textile fabric formed from fibers. The adsorptive filtering material is particularly useful in NBC protective materials of any kind (e.g. NBC protective apparel) and for producing filters.

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: The present invention is directed to the prevention of an exothermic reaction in the gas purifier of an ultra-high purity gas system.

Abstract: The assemblies of the invention can comprise a fine fiber layer having dispersed within the fine fiber layer an active particulate material. Fluid that flows through the assemblies of the invention can have any material dispersed or dissolved in the fluid react with, be absorbed by, or adsorbed onto, the active particulate within the nanofiber layer. The structures of the invention can act simply as reactive, absorptive, or adsorptive layers with no filtration properties, or the structures of the invention can be assembled into filters that can filter particulate from a mobile fluid while simultaneously reacting, absorbing, or adsorbing materials from the mobile fluid.

Abstract: An air filter sheet comprising particles of a functional agent with an average particle diameter of 0.1 to 30 ?m and fibrils of a polytetrafluoroethylene resin with a number average molecular weight of 3,000,000 to 50,000,000, the ratio by weight of the functional agent to the fibrils of the polytetrafluoroethylene resin being from 1 to 99. According to the present invention, an air filter sheet comprising fibrils of polytetrafluoroethylene resin with a functional agent carried thereon, possessing excellent formability, and being free from a lubricant, a process for manufacturing the air filter sheet, and an air filter free from contamination of outgas with a lubricant are provided.

Abstract: Disclosed herein is an exhaust oxygen recycling apparatus for ozone treatment equipment, which is used to refine an exhaust oxygenic gas, the exhaust oxygenic gas being discharged to the air after reaction in the ozone treatment equipment, and to recycle the refined oxygenic gas to generate ozone, including: an impurity removing unit for removing impurities from components included in the exhaust gas, the impurities being apt to be recognized as impurities in an ozone generator; and a compressor for compressing the exhaust gas or the exhaust gas refined by the impurity removing unit to a pressure at which the exhaust gas or the refined exhaust gas can be supplied to the ozone generator. The exhaust oxygen recycling apparatus purifies exhaust oxygen, discharged to the air after the reaction that takes place in the ozone treatment equipment, so as to recycle the refined oxygenic gas to generate ozone.

Abstract: A filter arrangement for filtering a fluid or gaseous medium, in particular in a motor vehicle, comprising a housing which holds a filter element in a receiving space, wherein the filter element has an edge region which bears at least in regions against the inner wall of the housing, is characterized, with regard to the problem of creating a filter arrangement which is of structurally simple design and has a high filter efficiency, in that the housing is shaped such that the receiving space tapers at least in regions in at least one spatial direction.

Abstract: A apparatus for substantially dehumidifying an insulating annular space (108) is provided. This apparatus includes an insulated surrounding envelope (106), an inner cylindrical device (107) and a partial annular cylinder (100) comprising at least two porous zones. This apparatus positions the partial annular cylinder (100) within the insulating annular space (108) that is formed by the inner cylindrical device (107) positioned within the insulated surrounding envelope (106). This partial annular cylinder (100) holds adsorbent.

Abstract: A dehumidifying deoxidizer containing oxygen-deficient cerium oxide and a dehumidifier is provided. The oxygen-deficient cerium oxide is preferably doped with an element increasing the oxygen absorption of the cerium oxide. The oxygen absorption sites of the cerium oxide are preferably obstructed by a site obstructing factor. The cerium oxide preferably has a fluorite type superlattice structure. Also provided are a dehumidifying and deoxidizing packet having the dehumidifying deoxidizer sealed in a bag-shaped, gas permeable casing and a dehumidifying and deoxidizing resin composition containing the dehumidifying deoxidizer and a gas permeable resin.

Abstract: Systems and methods for producing an ozone destructor are disclosed herein. Generally, these systems and methods include an ozone destructor that has a housing defining an air passage duct. In some cases, this air passage duct includes a first chamber and a second chamber that are arranged so that air is able to flow into the first chamber, through the second chamber, and out of the destructor. In some cases, an air drying mechanism is disposed in the first and/or the second chamber. Additionally, in some cases, the ozone destructor further includes multiple mechanisms that reduce ozone to oxygen. In light of these features, the ozone destructor is capable of incrementally drying and reducing air and ozone, respectively, as they pass through the first chamber and the second chamber.

Abstract: A filtration system has a filter housing, a pollution filter, and a connection conduit. The filter housing has an inlet chamber having openings. The pollution filter is positioned within the filter housing adjacent the inlet chamber to cover the openings. The connection conduit connects the filter housing with a relief valve so that gasses vented from a hydrocarbon distribution system through the relief valve are directed into the inlet chamber and through the pollution filter, which removes pollutants from the gasses.

Abstract: An air filtering assembly capable of filtering the air having particle matter prior to entrance of the air into a compressor compartment of a refrigeration apparatus comprising: an air filtering device where it said air filtering device includes a frame and a filter member where the filter member includes a front surface and a rear surface; and a support device, where said support device is capable of attaching to an underneath portion of a door of the refrigeration apparatus. The filter member is made of a filtering material, where the filtering material is selected from at least one of a micro fiber material, a plastic material and a paper material. The frame of the air filtering device may be either a rectangular shape or a square shape.

Abstract: An off gas extraction system provides superior results to other systems for cleaning polluted soil. Off gas is extracted, followed by compression and condensation. Compression and condensation produce an off gas that must be further treated to produce pollutant-free exhaust. A regenerative adsorber cleans the influent gas/air by adsorbing residual chemical vapor and concentrates the removed chemical vapor and reprocesses them. Conventional scrubbers are used on the back end of the system to produce a final exhaust as prescribed by environmental regulation. Methods of accomplishing the same are similarly provided, including unique business methods for conforming extraction plans with current environmental regulations and compliance impact generation based on an evolved knowledge base.

Abstract: Provided is a filter for removing a sulfur-containing-gas (1), which removes the sulfur-containing-gas by being brought into contact with the sulfur-containing-gas in a gas flow path, the filter including a former filter (11) disposed on an upstream side of the gas flow path, and a latter filter (12) disposed on a downstream side of the gas flow path, wherein the former filter (11) includes a first material for removing a sulfur-containing-gas, the first material including a porous support, and iodine which is supported on the porous support, and is produced by catalytic pyrolysis of ammonium iodide at a thermal decomposition ratio of 80% or more by use of the porous support as a catalyst, and the latter filter (12) includes a second material for removing a sulfur-containing-gas, the second material including an activated carbon fiber, and an alkali component which is supported on the activated carbon fiber.

Abstract: By providing a thin-type deodorizing filtering medium which can be mini-pleats-processed, a washing-regenerable filtering medium in which the deodorizing filtering medium and a dust collecting filtering medium are integrated and, further, a low pressure drop/dust collecting deodorizing filter unit which can be subjected to large air volume treatment are provided. A non-crimped single fiber having a specified Young's modulus and a specified fineness is used to prepare a nonwoven fabric sheet having high stiffness, and a gas adsorbing substance is adhered and fixed thereto.

Abstract: A jacket material into which a gas adsorbing device and core material are inserted is decompressed in a vacuum chamber, the opening is sealed, and then the jacket material is exposed to the atmosphere. In the atmospheric pressure, a pressure of about 1 atm which is equivalent to the pressure difference between the inside and outside is applied to the jacket material of the heat insulator. The jacket material is made of a plastic laminated film and is deformed by pressure. A protruding portion is plunged into a container to drill through holes, and a gas adsorbent in the container communicates with the inside of the jacket material. Thus, both during holding and in applying to the vacuum heat insulator, the gas adsorbent can be applied to the vacuum heat insulator without degradation, and the high degree of vacuum can be kept for a long time.

Abstract: A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.

Abstract: The method and system for methane separation and purification from a biogas includes collecting a raw Biogas gas stream having methane, carbon dioxide, water, sulfur compounds and non-methane organic compound (NMOC) constituents. The Biogas stream is fed into the intake of a liquid sulfur scrubber or a sulfur adsorber unit where the Biogas is separated into a main gas stream routed downstream in the system and a sulfur compounds stream removed from the system. The main gas stream is then processed by an NMOC absorber and further downstream, by an NMOC adsorber. NMOC produced by both NMOC processes is liquefied, removed from the system and stored. Upstream from the NMOC processes, the main gas stream is processed by at least one CO2, N2, O2 gas separation unit that produces a usable product stream of enriched methane gas, and an off-gas stream, which a VPSAU processes for venting and recycling.

Abstract: A filter for a gas mask has a concave outlet wall and a convex inlet wall with a particulate filter bed that has a uniform depth and conforms substantially to the shape of the inlet and outlet wall. The side wall can have an elliptical, circular or convex shape to conform to the curvature of the wearer's face, or a planar shape. The filter an be a double particulate filter element and a double adsorption filter element configured for axial airflow therethrough with a bifurcated flow pattern. The adsorption filter element comprises a granulated charcoal, a composite material having carbon particles combined with binder particles, or an immobilized bed of charcoal granules and EVA-coated fibers.

Abstract: A filter for removing contaminants from air. The filter includes (a) a substrate that does not have any volatile ammonia on the surface thereof; (b) copper that has been impregnated onto the substrate; and (c) molybdenum and/or tungsten that has been impregnated onto the substrate. The filter can be made using an aqueous solution(s) that contains one or more of a first copper salt and a second salt that include a polynuclear anion that contains molybdenum, tungsten, or both. Because the metals can be impregnated onto the substrate surface without using an ammonium-based solution, the need to manage ammonia off-gassing is avoided. Further, no volatile ammonia would be present on the resulting substrate surface.

Abstract: A jacket material into which a gas adsorbing device and core material are inserted is decompressed in a vacuum chamber, the opening is sealed, and then the jacket material is exposed to the atmosphere. In the atmospheric pressure, a pressure of about 1 atm which is equivalent to the pressure difference between the inside and outside is applied to the jacket material of the heat insulator. The jacket material is made of a plastic laminated film and is deformed by pressure. A protruding portion is plunged into a container to drill through holes, and a gas adsorbent in the container communicates with the inside of the jacket material. Thus, both during holding and in applying to the vacuum heat insulator, the gas adsorbent can be applied to the vacuum heat insulator without degradation, and the high degree of vacuum can be kept for a long time.

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: The subject matter disclosed herein relates to a method of reducing an amount of mercury discharged to an environment in a flue gas (12) generated by combustion of a fuel source. The method includes contacting the flue gas with a moist pulverous material upstream of a particle separator (24), mixing powdered activated carbon (PAC) in an amount between about 0.5 lb/MMacf and 10 lbs/MMacf with the flue gas (12) upstream of the particle separator (24), wherein the PAC interacts with at least a portion of mercury containing compounds in the flue gas (12), and separating the mercury containing compounds from the flue gas (12) containing the moist pulverous material and PAC, thereby reducing an amount of mercury in the flue gas (12).

Abstract: A fuel vapor processor has a fuel tank, a canister, a vapor pipe, a recovery pipe, an air pipe, a suction device, a vapor pipe valve, an air pipe valve, and a pressure regulator. The vapor pipe leads fuel vapor generated in the fuel tank to the canister for trapping the fuel vapor in the canister. The recovery pipe recoveries the fuel vapor desorbed from the canister into the fuel tank. The air pipe communicates the canister with the atmosphere. The suction device is disposed on the recovery pipe for desorbing the fuel vapor trapped in the canister. The pressure regulator is communicated with the air pipe between the air pipe valve and the canister in order to allow gas flow from the atmosphere toward the canister. During desorption of the fuel vapor due to the suction device, the vapor pipe valve and the air pipe valve are closed, and negative pressure is kept in the canister such that the fuel vapor is desorbed from the canister and fresh air is led into the canister via the pressure regulator.

Abstract: A flame-retardant hydrocarbon adsorption trap is adapted for mounting within an air intake tract. The traps includes a hydrocarbon vapor adsorbent media adapted to adsorb hydrocarbon vapors from an intake tract when an engine is not operating then later releasing the vapors when the engine runs. The trap includes at least two air permeable HCA media retention layers positioned in a spaced parallel relationship and forming a gap there-between into which hydrocarbon vapor adsorbent media is received. The retention layers are formed of a synthetic fiber media adapted to provide flame-resistant properties.