The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2003
Filed:
Sep. 29, 2000
Rolf Brück, Bergisch Gladbach, DE;
Peter Hirth, Lohmar, DE;
Emitec Gesellschaft fuer Emissionstechnologie mbH, Lohmar, DE;
Abstract
A honeycomb body includes separating walls defining channels for channelling a gas, and an adsorber material disposed on at least part of the separating walls. The inner cross-section and number of channels define a specific geometric surface area (GSA) of the honeycomb body, and they are at least partially separated from one another by separating walls. The material and thickness of the walls define a specific heat capacity with regard to the geometric unit area. The honeycomb body has an adsorption material provided especially for hydrocarbon adsorption. The specific GSA of the body is greater than or equal to 37.5 m K/J, preferably, ≧40, and, particularly, >60, the GSA being divided by the specific heat capacity (cp) with regard to the area, measured at room temperature without absorption material and eventual other coatings. The body can additionally have a catalytically active coating that, at least, is oxidative. The body is preferably constructed of sheet metal layers having a thickness of ≦40 &mgr;m with more than 450 cpsi, especially more than 540 cpsi. A hydrocarbon trap of such dimensions can be used for the purification of motor vehicle exhaust gases to reduce the emission of pollutants during the cold-start phase.