The present description provides high working capacity adsorbents with low DBL bleed emission performance properties that allows the design of evaporative fuel emission control systems that are lower cost, simpler and more compact than those possible by prior art. Emission control canister systems comprising the adsorbent material demonstrate a relatively high gasoline working capacity, and low emissions.

A monolithic open cell structure apparatus including an open cell structure housing including a first side, a second side opposite the first side, a first opening located at the first side, and a second opening located opposite the first opening at a second side. The monolithic open cell structure apparatus also including a filtration portion extending from the first side to the second side within the open cell structure housing. The monolithic open cell structure apparatus further including a retaining partition that at least partially encloses the filtration portion within the open cell structure housing. The monolithic open cell structure apparatus is a single piece including a unitary structure.

A portable dehumidifying chamber includes a frame of a structure configured to include a first zone, a second zone, and a third zone, where a plurality of exterior walls coupled to the frame of the structure isolate the first zone, the second zone, and third zone from surrounding environmental conditions. A heating device disposed in the first zone to facilitate heated air flow from the first zone to the third zone, where the heated air flow contacts an object disposed in the second zone to facilitate dehumidification of the object. A conduit connecting the third zone to the first zone, where the conduit allows for humidified air flow to bypass the second zone, where the conduit includes a moisture removing apparatus. A first vapor barrier material separates the first zone and the second zone and a second vapor barrier material separates the second zone and the third zone.

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.

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.

A high performance ADSorption Heat eXchanger ADS-HX includes a hygroscopic composite biopolymer, a heat exchange medium in contact with the hygroscopic composite biopolymer and a hollow conduit in contact with the heat exchange medium, into which hollow conduit either a cooling fluid or a heating fluid are alternately made to pass, so that the adsorption heat exchanger can be operated under high ambient temperatures and low relative humidity conditions, which are typical of arid climates. A process is provided for producing the aforesaid high performance ADSorption Heat eXchanger ADS-HX. A preferred and advantageous application of the aforesaid high performance ADSorption Heat eXchanger ADS-HX is in combination with the atmospheric water harvesting device described in the international application published at no. WO 2019/082000 A1 of the same Applicant.

The present description provides low DBL bleed emission performance properties that allows the design of evaporative fuel emission control systems that are simpler and more compact than those possible by prior art by inclusion of a vent-side volume comprising a parallel passage adsorbent such as a carbon honeycomb with narrow channel width and low cell pitch.

A sorbent structure that includes a continuous body in the form of a flow-through substrate comprised of at least one cell defined by at least one porous wall. The continuous body comprises a sorbent material carbon substantially dispersed within the body. Further, the temperature of the sorbent structure can be controlled by conduction of an electrical current through the body.

A graphene based adsorbent material incorporated into a scrubber forming a portion of a canister or connected to a vent port of the canister in the evaporative emissions management system. The adsorbent material is specifically adsorptive of vaporized hydrocarbons for preventing bleed emissions while also providing low flow restrictions. The graphene adsorbent being provided as an activated graphene derivative and a polymer extruded in a honeycomb design pattern to provide a plurality of passageways for the flow of the vapors. The scrubber connected to the EVAP canister vent port and incorporating a scrubber element exhibiting a honeycomb extruded structure having any combination of activated graphene-derivatives, lignocellulose, charcoal, ceramic, binder and flux material.

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.