New catalyst with a support arranged in a cladding tube, where the catalyst support is from a honeycomb body having many flow direction of the exhaust gas extending channels, useful to purify exhaust gases from a combustion engine

摘要

#CMT# #/CMT# Catalyst (1) with a catalyst support arranged in a cladding tube (5), is new, where the catalyst support is from at least one honeycomb body (6, 7) having many flow direction (2) of the exhaust gas extending channels (8, 9) with which the exhaust gas flow is fed; the honeycomb body at the inlet (3) of the catalyst exhibits a convex or concave formed inlet side (11) with inlet openings into the channel (8), which are formed for absorbing portions of exhaust gas flow; and the inlet side of the honeycomb body reaches the inlet of the catalyst in the transverse flow direction. #CMT# : #/CMT# An independent claim is included for the preparation of the catalyst. #CMT#USE : #/CMT# The catalyst is useful for purifying the exhaust gases from a combustion engine. #CMT#ADVANTAGE : #/CMT# The catalyst exhibits high efficiency within a short time. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a perspective view of the catalyst. 1 : Catalyst 2 : Flow direction of the exhaust gas 3 : Inlet 5 : Cladding tube 6, 7 : Honeycomb bodies 8, 9 : Exhaust gas extending channels 11 : Inlet side. #CMT#INORGANIC CHEMISTRY : #/CMT# Preparation (Claimed): Preparation of the catalyst comprises helically winding a corrugated metal strip to form the honeycomb bodies, where the metal strip to form the honeycomb body (6) at the inlet of the catalyst has a blank from which the helical winding of the honeycomb body formed with a convex or concave inlet side is formed; fixing the honeycomb bodies in the casing tube; and subsequently providing a catalyst layer into the channels of the honeycomb bodies. Preferred Components: The catalyst comprises at least two honeycomb bodies arranged one behind one in the flow direction of the exhaust gas. The catalyst support is formed from a metal support, where the honeycomb bodies comprise corrugated, spirally wound metal sheet. The honeycomb body (6) at the inlet of the catalyst exhibits a coating with a higher catalytic activity than at least one, which is arranged behind honeycomb body (7). #CMT#EXAMPLE : #/CMT# None given.