Patent ID: 8443786
Filing Date: 2013-05-21
Classification: B01D,F02M

Abstract:
1. Fuel vapor adsorbents used for a fuel vapor storage canister of an automotive vehicle, comprising: small granular fuel vapor adsorbent having micropores forming a microporous structure, disposed in a first section of a casing of the fuel vapor storage canister; large granular fuel vapor adsorbent which is larger in size than the small granular fuel vapor adsorbent, disposed in a second section of the casing of the fuel vapor storage canister, the large granular fuel vapor adsorbent including granules each of which has micropores forming a microporous structure and macropores forming a macroporous structure, the micropores being connected to the macropores such that fuel vapor flows between the micropores and the macropores, the macropores being larger in diameter than the micropores, the large granular fuel vapor adsorbent being produced by a process including mixing powdery activated carbon, a material which is solid at ordinary temperature and able to evaporate, sublime or decompose at temperatures made during baking, and a binder to form a mixture; forming the mixture into a shape; and baking the formed mixture in atmosphere of inert gas to form granules, each granule having the micropores and the macropores which are connected with each other, the micropores being derived from the powdery activated carbon, the macropores resulting from the material.