Abstract: An object is to provide a new form of adsorbent suitable for a high performance canister. An adsorbent including activated carbon is used as the adsorbent for the canister and satisfies the following conditions. P0.2/100 expressed by Equation 1: P0.2/100=X÷Y×100??(Equation 1) is 18% or more, in Equation 1, X represents an amount of adsorbed n-butane gas per 100 parts by weight of the adsorbent at 25° C. under an atmosphere where a gas pressure of n-butane gas is 0.2 kPa, and Y represents an amount of adsorbed n-butane gas per 100 parts by weight of the adsorbent at 25° C. under an atmosphere where a gas pressure of n-butane gas is 100 kPa.

Abstract: Sorbent material sheets products that include sorbent material sheets and at least one porous cover layer are attached to an inner wall surface that is defined by an air intake. The sorbent material sheets collect vapors such as hydrocarbon vapors from engine components such as the combustion chamber, injectors, carburetor, fuel ports, crankcase, or other engine components, thereby reducing evaporative emissions. In certain configurations, the sorbent material sheet product includes an edge seal that improves the handling of the sorbent material sheets during the manufacturing process.

Abstract: Disclosed in certain embodiments are processes for heavy hydrocarbon removal that implement a regeneration loop to reduce an amount of liquid hydrocarbons exposed by the separator to the regeneration stream over one or more durations for which an average C5+ hydrocarbon content of the regeneration stream is reduced or minimal.

Abstract: An evaporative emission control canister system comprises an initial adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, and at least one subsequent adsorbent volume having an effective incremental adsorption capacity at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, an effective butane working capacity (BWC) of less than 3 g/dL, and a g-total BWC of between 2 grams and 6 grams. The evaporative emission control canister system has a two-day diurnal breathing loss (DBL) emissions of no more than 20 mg at no more than 210 liters of purge applied after the 40 g/hr butane loading step.

Abstract: An activated carbon device for adsorbing solvent from a flow of air is regenerated by feeding heated inert gas to the activated carbon and by applying a reduced pressure to the heated activated carbon.

Abstract: An evaporative emission control canister system comprises an initial adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, and at least one subsequent adsorbent volume having an effective incremental adsorption capacity at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, an effective butane working capacity (BWC) of less than 3 g/dL, and a g-total BWC of between 2 grams and 6 grams. The evaporative emission control canister system has a two-day diurnal breathing loss (DBL) emissions of no more than 20 mg at no more than 210 liters of purge applied after the 40 g/hr butane loading step.

Abstract: The present disclosure relates to hydrocarbon emission control systems. More specifically, the present disclosure relates to substrates coated with hydrocarbon adsorptive coating compositions, air intake systems, and evaporative emission control systems for controlling evaporative emissions of hydrocarbons from motor vehicle engines and fuel systems.

Abstract: An evaporative emission control canister system comprises an initial adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, and at least one subsequent adsorbent volume having an effective incremental adsorption capacity at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, an effective butane working capacity (BWC) of less than 3 g/dL, and a g-total BWC of between 2 grams and 6 grams. The evaporative emission control canister system has a two-day diurnal breathing loss (DBL) emissions of no more than 20 mg at no more than 210 liters of purge applied after the 40 g/hr butane loading step.

Abstract: An evaporative emission control canister system comprises an initial adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, and at least one subsequent adsorbent volume having an effective incremental adsorption capacity at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, an effective butane working capacity (BWC) of less than 3 g/dL, and a g-total BWC of between 2 grams and 6 grams. The evaporative emission control canister system has a two-day diurnal breathing loss (DBL) emissions of no more than 20 mg at no more than 210 liters of purge applied after the 40 g/hr butane loading step.

Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing a startup mode process prior to beginning a normal operation mode process to remove contaminants from a gaseous feed stream. The startup mode process may be utilized for swing adsorption processes, such as TSA and/or PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

Abstract: Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing a startup mode process prior to beginning a normal operation mode process to remove contaminants from a gaseous feed stream. The startup mode process may be utilized for swing adsorption processes, such as TSA and/or PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

Abstract: A process is provided to treat a natural gas stream by removing heavier hydrocarbons comprising C5, C6 and heavier hydrocarbons. The process involves sending a natural gas stream through an adsorbent bed to remove heavier hydrocarbons and producing a product stream comprising C1 to C4 hydrocarbons. A portion of the product stream is sent through a regeneration heater to produce a heated regeneration gas stream which is sent through the adsorbent bed to desorb the heavier hydrocarbons. Then the regeneration gas stream is cooled and sent to a separation unit such as a distillation column to divide the regeneration gas stream into a liquid stream comprising heavier hydrocarbons and a recovered regeneration gas stream.

Abstract: A volatile liquid vapor recovery system is used to recover vapors produced in the loading of shipping vehicles with volatile liquid product from a storage tank. The recovery system uses a primary vessel with an adsorption bed for adsorbing the volatile liquid vapors and venting clean air including oxygen to the atmosphere. The recovery system regenerates the adsorption bed by recovering the volatile liquid vapors from the adsorption bed and directly delivering said vapors to the storage tank. The system may be adapted to remove oxygen from the primary vessel prior to regeneration, such as by purging and venting the primary vessel with a purge gas or by providing a secondary vessel to receive oxygen and vapors from the primary vessel prior to regeneration of the first adsorption bed. Adsorbed volatile liquid vapor from the secondary vessel can be recycled to the primary vessel for conservation.

Abstract: This vapor control logic system is for optimizing terminal loading capacity by controlling load rack fuel dispensing with a vapor recovery unit (VRU) to prevent undesirable shutdown of fuel dispensing at terminal facilities.

Abstract: To obtain adsorbent (10), meltable core which melts away during baking and binder are added to powdery activated carbon having microscopic pore whose size is less than 100 nm together with water and mixed together, then this mixture is molded into hollow cylindrical shape whose outside diameter is 4˜6 mm and baked. Although macroscopic pore whose side is 100 nm or more is formed by the meltable core, proportion of volume of the macroscopic pore to volume of the microscopic pore is adjusted to 65%˜150%. The adsorbent (10) has shape in cross section formed from cylindrical wall (10A) and cross-shaped radial wall (10B), and thickness of each part is within a range of 0.6˜3 mm. The adsorbent (10) of the present invention can satisfy adsorbing/desorbing performance of fuel vapor, flow resistance as a canister and strength of the adsorbent at the same time.

Abstract: A vapor recovery system includes a product handling circuit and a control circuit. The control circuit maintains a negative pressure in the product handling circuit in order to prevent undesirable fugitive vapor emissions.

Abstract: One aspect of the present teachings includes a separation membrane arranged in a hollow case. A particular component concentration chamber and a particular component dilution chamber are arranged in series in the hollow case. The particular component concentration chamber is capable of increasing concentration of the particular component by allowing permeation of the particular gas through the separation membrane. The particular component dilution chamber is capable of increasing concentration of the particular component by not allowing permeation of the particular gas through the separation membrane. The particular component concentration chamber and the particular component dilution chamber are configured such that only a gas containing the particular component and permeated through the separation membrane or only a gas containing the particular component not permeated through the separation membrane in one of the chambers disposed on an upstream side (i.e.

Abstract: A vapor recovery system includes a product handling circuit and a control circuit. The control circuit maintains a negative pressure in the product handling circuit in order to prevent undesirable fugitive vapor emissions.

Abstract: To provide an adsorbent which achieves a low-emission performance while maintaining the adsorption performance for adsorbing an evaporated fuel component, a canister comprising the adsorbent, and a method for reducing evaporated fuel emission. A second adsorbent (e.g., a granule) filled in a second compartment disposed in a downstream side with respect to a first compartment comprises an activated carbon as an adsorption site and a solid diluent as a non-adsorption site. The adsorbent has a difference in n-butane adsorption volume of not less than 35 g/L between a n-butane vapor concentration of 5% by volume and a n-butane vapor concentration of 50% by volume measured at 25° C., a butane working capacity measured in accordance with ASTM D5228 of not less than 8 g/dL, and a butane desorption rate of not less than 45% when a purge air amount measured in accordance with ASTM D5228 is 30 bed volumes of the adsorbent volume.

Abstract: An evaporative emission control system includes a fuel tank, a canister, a normally-closed control valve, a filler pipe, and a breather pipe. The fuel tank is to store fuel. The canister is to adsorb evaporative fuel generated in the fuel tank. The normally-closed control valve is provided in a vapor passage connecting the fuel tank to the canister. The fuel is delivered to the fuel tank through the filler pipe. The breather pipe includes a communicating passage, an opening, and at least one hole. The communicating passage connects the fuel tank to the filler pipe. The opening is provided at a first end of the breather pipe in the fuel tank. The opening is located below a predetermined fuel level in the fuel tank. The at least one hole is located above the predetermined fuel level in the fuel tank.

Abstract: A system is configured to remove volatile organic compounds from a container. The system includes an enclosed contactor vessel having a first inlet to receive vapor containing volatile organic compounds from the container and a second inlet. The second inlet receives a vapor capture medium from a source. A contactor facilitates entrainment of the volatile organic compounds with the vapor capture medium while a first outlet recirculates treated vapor back to the container to effect a closed loop.

Abstract: A method for reducing hydrocarbon emissions from automotive evaporative emissions control systems comprising steps of: contacting a vented fuel vapor stream from a fuel tank (1) with a first passive purge canister bed (5), the passive purge canister bed comprising a vapor adsorbent material and including a passive purge vapor inlet and a passive purge vapor outlet for vapor stream flow, —contacting a vapor stream from the passive purge vapor outlet with an active purge canister bed, the active purge canister bed (2) comprising a vapor adsorbent material; contacting the active purge canister bed with mechanically convected purge air, wherein the mechanically convected purge air is prevented from flowing through the passive purge canister bed; and contacting the passive purge canister bed with fresh purge air drawn passively by the fuel tank through the passive purge vapor outlet without first contacting said active purge canister bed.

Abstract: A fuel vapor removal method for an aircraft includes removing an ullage mixture from ullage of a fuel tank of an aircraft, exposing the ullage mixture to adsorption media on the aircraft to reduce its fuel-air ratio, and returning the reduced fuel-air ratio ullage mixture to the fuel tank. A fuel vapor removal system onboard an aircraft includes a fuel tank, having ullage containing an ullage mixture, a pumping device, configured to pump the ullage mixture in a closed loop from the fuel tank ullage and back, an adsorption system, interposed in the closed loop, and a controller, including a microprocessor and system memory. The adsorption system includes an adsorber having adsorption media capable of adsorbing fuel vapor from the ullage mixture, and the controller is programmed to activate the pumping device, to pump the ullage mixture from the ullage, through the adsorption system, and return a reduced fuel-air ratio ullage mixture back to the ullage.

Abstract: Dehumidifier for photovoltaic modules, of a series of photovoltaic concentration modules, formed by a common air inlet and outlet access that communicates all the modules, and which passes through a bed of moisture absorbing material, having an electrical self-adjusted resistance (15) installed therein. The circuit is completed with a solenoid valve (13), a flow switch (19), a non-return valve (12); a pressure switch (16) and a timer relay (20). The process is based on pressure differences existing within the photovoltaic modules throughout the day, and consists of two steps: drying air by passing through the bed of absorbent material before entering into the photovoltaic modules and the regeneration of the drying system, which can be automatically or manually by connecting a compressor or fan.

Abstract: An activated carbon filter including a filter housing; at least one chamber having a flow cross-section; activated carbon arranged in said chamber; and at least one carbon heating device. The heating device heats the carbon over the entire flow cross-section in a substantially uniform manner.

Abstract: A drying system includes a desiccant wheel that dries incoming air. The dried air is heated using a heating element to promote drying of an article within the drying system. A portion of the heated air is diverted to a secondary air path that leads away from the drum holding the article. The diverted portion is used to regenerate an area of the desiccant wheel. A secondary heating element is used to promote regeneration and located in the secondary air path.

Abstract: A device for selectively regenerating and performing tank leakage diagnosis of a tank ventilation system has a sorption filter and a pump. The sorption filter is configured to temporarily store fuel evaporating from a fuel tank. The pump is arranged at a fresh-air side of the sorption filter and is connected in fluid-conducting fashion to the sorption filter. The pump is configured to generate a fluid flow to regenerate the sorption filter.

Abstract: A canister includes a first fuel vapor adsorption device and a second fuel vapor adsorption device. The second fuel vapor adsorption device can adsorb a part of fuel vapor that still remains in a gas after desorption by the first fuel vapor adsorption device. The second fuel vapor adsorption device includes a first passage containing a fuel vapor adsorption material and a second passage containing no fuel vapor adsorption material. The first passage and the second passage allow the gas to flow therethrough. A gas introduction device allows the fuel vapor to flow from the second passage into the first passage.

Abstract: Provided are a low-molecular-weight organic gas absorbent material including a porous material having an average pore size of 10 to 200 nm impregnated with one or more organic compounds having 10 or more carbon atoms in a proportion of 10 wt % or more based on the porous material, and a fuel vapor treatment apparatus for an internal combustion engine using this low-molecular-weight organic gas absorbent material. This low-molecular-weight organic gas absorbent material sufficiently absorbs and removes low-molecular-weight organic gases even for a porous material having large pores which cannot adsorb low-molecular-weight organic gases such as butane and the like.

Abstract: [Object(s)] To provide an adsorbent which achieves a low-emission performance while maintaining the adsorption performance for adsorbing an evaporated fuel component, a canister comprising the adsorbent, and a method for reducing evaporated fuel emission. [Means to Solve the Problems] A second adsorbent (e.g., a granule) filled in a second compartment disposed in a downstream side with respect to a first compartment comprises an activated carbon as an adsorption site and a solid diluent as a non-adsorption site. The adsorbent has a difference in n-butane adsorption volume of not less than 35 g/L between a n-butane vapor concentration of 5% by volume and a n-butane vapor concentration of 50% by volume measured at 25° C., a butane working capacity measured in accordance with ASTM D5228 of not less than 8 g/dL, and a butane desorption rate of not less than 45% when a purge air amount measured in accordance with ASTM D5228 is 30 bed volumes of the adsorbent volume.

Abstract: A method is provided for diagnosing the operability of fuel vapor intermediate stores (4), in particular of activated carbon filters, in tank-venting systems with at least one tank (3) and at least one fuel vapor intermediate store (4). In this case an actual change degree of filling of the fuel vapor intermediate store (4) is determined as a consequence of absorption or desorption processes of gaseous hydrocarbons in the fuel vapor intermediate store (4). The actual change in degree of filling is compared with a desired change in degree of filling and, from the comparison, a conclusion about the operability of the fuel vapor intermediate store (4) is drawn.

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 system is configured to remove volatile organic compounds from a container. The system includes an enclosed contactor vessel having a first inlet to receive vapor containing volatile organic compounds from the container and a second inlet. The second inlet receives a vapor capture medium from a source. A contactor facilitates entrainment of the volatile organic compounds with the vapor capture medium while a first outlet recirculates treated vapor back to the container to effect a closed loop.

Abstract: The disclosure provides a CO2 absorption method using an amine-based solid sorbent for the removal of carbon dioxide from a gas stream. The method disclosed mitigates the impact of water loading on regeneration by utilizing a conditioner following the steam regeneration process, providing for a water loading on the amine-based solid sorbent following CO2 absorption substantially equivalent to the moisture loading of the regeneration process. This assists in optimizing the CO2 removal capacity of the amine-based solid sorbent for a given absorption and regeneration reactor size. Management of the water loading in this manner allows regeneration reactor operation with significant mitigation of energy losses incurred by the necessary desorption of adsorbed water.

Abstract: A hydrocarbon adsorber and a thermoplastic resin combined and formed to a porous scavenger for insertion into the air intake system of a motor vehicle engine. The resulting porous scavenger adsorbs volatile hydrocarbon molecules from raw fuel remaining in the air intake when the engine is shout off. The adsorbed molecules are then stripped or purged from the scavenger and reintroduced into the air intake when the engine is next started.

Abstract: A system and method for systematically generating potential metal-organic framework (MOFs) structures given an input library of building blocks is provided herein. One or more material properties of the potential MOFs are evaluated using computational simulations. A range of material properties (surface area, pore volume, pore size distribution, powder x-ray diffraction pattern, methane adsorption capability, and the like) can be estimated, and in doing so, illuminate unidentified structure-property relationships that may only have been recognized by taking a global view of MOF structures. In addition to identifying structure-property relationships, this systematic approach to identify the MOFs of interest is used to identify one or more MOFs that may be useful for high pressure methane storage.

Abstract: Provided are a low-molecular-weight organic gas absorbent material including a porous material having an average pore size of 10 to 200 nm impregnated with one or more organic compounds having 10 or more carbon atoms in a proportion of 10 wt % or more based on the porous material, and a fuel vapor treatment apparatus for an internal combustion engine using this low-molecular-weight organic gas absorbent material. This low-molecular-weight organic gas absorbent material sufficiently absorbs and removes low-molecular-weight organic gases even for a porous material having large pores which cannot adsorb low-molecular-weight organic gases such as butane and the like.

Abstract: A method for rapidly emptying an activated carbon filter while using an HC sensor (concentration change). A device for a tank system, for a motor vehicle having the device for a tank system and to a method for emptying an activated carbon filter for a tank system. The concentration of volatile components which are flushed from the activated carbon filter is detected by a concentration sensor. The concentration sensor is used as an early warning sensor to prevent any disturbances of mixture production of an engine.

Abstract: A hydrocarbon adsorption trap for adsorption of evaporated fuel vapors includes a first fuel vapor permeable media retention layer, a second media retention layer positioned in a spaced parallel relationship to the first layer forming a gap therebetween and a hydrocarbon vapor adsorbent media disposed in the gap between the first and second layers for adsorbing evaporated fuel vapors from the intake tract when the engine is not operating. A mounting member is secured to peripheral edge portions of the layers and closes the gap between the layers while providing a means of securing the trap into an air intake tract.

Abstract: An object of the present invention is to provide an adsorbent suitable as an adsorbent for a canister which is capable of reducing an amount of evaporated fuel gas released into the atmosphere even where a motor vehicle is allowed to park for a prolonged period of time, a process for producing the adsorbent as well as a canister using the adsorbent and a method for using the canister. The above object can be accomplished by an adsorbent in which an integrated volume of pores having an average diameter of 3,000 to 100,000 nm as measured with a mercury porosimeter is 6.5 mL/dl or more and an equilibrium adsorption as measured in an n-butane volume concentration of 2,000 ppm is 0.16 g/dL or more, a process for producing the adsorbent, as well as a canister and a method for using the canister.

Abstract: An active carbon filter unit for a tank system consists of a housing (13) in which two chambers (31, 32) are formed, carrying an active carbon filling, which form a section of a flow path which at its one end leads via a valve (6) and an air filter (7) into the ambient atmosphere and at its other end leads via a valve (9) and a non-return valve (10) to a connection for producing an underpressure or into the suction region of an internal combustion engine and via a connection (17) into the tank system. The valves (6, 9), the non-return valve (10) and a housing part (27) receiving the electrical connections thereof are part of a uniform control module (15), which is exchangeably inserted into a recess (14) of the housing (13).

Abstract: A dryer and a drying apparatus attachable to a dryer are disclosed. A wheel having desiccant material is located in line and in close proximity with a heating element. The wheel includes a first portion positioned in an inlet air path and a second portion positioned in an outlet air path. The desiccant material removes water molecules from air within the inlet air path, and lowers the vapor pressure of the incoming air. In the outlet air path, heated air flows through the second portion to transfer energy to the desiccant material. The wheel rotates to change the desiccant material within the portions.

Abstract: The present invention provides an activated carbon having an average length/average diameter (L/D) of 0.8 to 1.2 and a difference between the 1/1-volume benzene adsorption rate and the 1/10-volume benzene adsorption rate of 6.0 g/100 mL or more, and a canister and an intake air filter utilizing such activated carbon as an adsorbent. The activated carbon has a substantially spherical configuration and excellent hydrocarbon adsorption/desorption capacity. A canister and an intake air filter utilizing such activated carbon as an adsorbent have excellent hydrocarbon adsorption/desorption capacity.

Abstract: A carbon canister to adsorb hydrocarbons from a hydrocarbon air mixture in a UST system to prevent fugitive emissions due to overpressurization. The carbon canister has an inlet port at one end coupled to the UST system. An outlet port on the opposite end of the canister is connected to a flow-limiting orifice with a known calibrated flow rate that vents in a controlled fashion to the atmosphere. When UST pressure rises slightly above ambient pressure, fuel vapors and air from the UST system enters, via the inlet port, into the canister, where hydrocarbons are adsorbed onto the surface of the activated carbon. The cleansed air vents through the controlled flow outlet port to atmosphere, thereby preventing excessive positive pressure from occurring in the UST system. The activated carbon is purged of hydrocarbons by means of reverse air flow caused by negative UST pressures that occur during periods of ORVR vehicle refueling.

Abstract: A carbon canister with a valve activated by the weight of nearly saturated or saturated carbon communicates with piping from an underground tank. The invention includes carbon within a casing inside a canister, a weight actuated valve, and piping in communication with the atmosphere. When an ORVR vehicle refuels, the pressure lowers in the tank that draws air into the canister. After refueling, the tank remains subject to conditions that generate hydrocarbon vapors. Those vapors then return to the canister and adhere to the surface of the carbon. The carbon, heavier with hydrocarbons, lowers the canister and closes the weight actuated valve. Closing the valve returns pressure control to an external pressure vacuum relief valve. The next refueling draws in atmospheric air to purge the hydrocarbons in the canister and thus lighten it. A secondary purge valve also removes hydrocarbons from the canister. Once the carbon lightens, the inlet valve opens and the vapors return to the canister for adsorption.

Abstract: Activated carbon in which the residual amount of hydrocarbon (HC) can be reduced and a canister using such activated carbon are provided. Activated carbon in which the residual amount of butane is determined to be 1.2 g/100 ml or less after butane is adsorbed thereon and desorbed therefrom in accordance with the determination of BWC (ASTM D-5228) and a canister using such activated carbon as an adsorbent are provided.

Abstract: Devices, systems and methods are provided for adsorbing hydrocarbons from the air intake system of an internal combustion engine. The devices, systems and methods include a hydrocarbon absorbent material, and a structural element configured to hold the hydrocarbon absorbent material within a clean air tube of an internal combustion engine.

Abstract: A domestic appliance including an adsorption unit and further including a process air conduit, wherein an adsorption container operates as a heat exchanger for heating a stream of air flowing in the process air conduit and being applied to the adsorption container, with the adsorption unit configured for alternate and reversible operation in a first operating state in which a stream of air flowing in the process air conduit is applied to the adsorption container and which adsorbs adsorptive evaporating in the phase transition container, and in a second operating state in which the adsorbing agent is heated by the heater and the adsorptive is desorbed, with desorbed adsorptive condensing in the phase transition container, the domestic appliance including an assembly operatively associated with the adsorption unit for applying a stream of air flowing in the process air conduit to the adsorption container in the second operating state.

Abstract: The invention relates to a method for reducing emissions due to gaseous decomposition products of an electrolyte of electrochemical storage devices in a motor vehicle, preferably double-layer capacitors with organic solvents as the electrolyte. According to this invention, the gaseous decomposition products are sent to an activated carbon filter and/or a molecular sieve for deposition of at least a portion of the decomposition products and/or a chemically reactive material and/or a catalytically active material for conversion of at least a portion of the decomposition products. In addition, devices for implementing the inventive method are described.

Abstract: An adsorption/desorption device is communicated with an upper space of a fuel tank via a vapor passage. The adsorption/desorption device is configured to selectively adsorb or desorb air components contained in vapor. The adsorption/desorption device and the vapor passage are not communicated to the external atmosphere. The fuel tank is provided with a pressure detecting device for detecting the internal pressure of the fuel tank. A pressure regulating device is provided to the vapor passage for controlling and maintaining the pressure applied to the adsorption/desorption device. When the internal pressure of the fuel tank is higher than the atmospheric pressure, the internal pressure of the fuel tank is pressure-fed to the side of the adsorption/desorption device via the pressure regulating device until the internal pressure of the fuel tank becomes in equilibrium with the atmospheric pressure.