Graphene based adsorbent material for a scrubber incorporated into a vent line extending from a vent port of an evap canister and an adsorbent material including polystyrene-divinylbenzene adsorbents mixed with polyurethane foam matrix for improved hydrocarbon bleed control

Abstract

A hydrocarbon scrubber for an evaporative emission control system having an adsorbent composition including a polystyrene-divinylbenzene (PS-DVB) copolymer mixed with a polyurethane foam matrix wherein the scrubber is configured to adsorb fuel vapor bleed during hot-soak or diurnal conditions and maintain low flow restriction. The scrubber material can also be integrated into a vent line connected to a vent port of the canister in the evaporative emissions management system. The adsorbent material can also include a Graphene-derivative sorbent material in either of a polymer foam or extruded honeycomb design pattern specifically adsorptive of vaporized hydrocarbons for preventing bleed emissions while also providing low flow restrictions. The scrubber can include any combination of activated graphene-derivatives, lignocellulose, charcoal, ceramic, binder and flux material.

Dependencies are inferred from the claim text.