EXTRUDED HONEYCOMB CATALYST

摘要

An extruded honeycomb catalyst for nitrogen oxide reduction according to the selective catalytic reduction (SCR) method in exhaust gases from motor vehicles comprisesan extruded active carrier in honeycomb form comprising a first SCR catalytically active component and with a plurality of channels through which the exhaust gas flows during operation, and a washcoat coating comprising a second SCR catalytically active component being applied to the extruded body, wherein the first SCR catalytically active component and the second SCR catalytically active component are each independently selected from the group consisting of: (i)vanadium catalyst with vanadium as catalytically active component; (ii)mixed-oxide catalyst with one or more oxides, in particular those of transition metals or lanthanides as catalytically active component;and (iii)an Fe-or a Cu-zeolite catalyst.