Patent ID: 6120746
Filing Date: 2000-09-19
Classification: B01D,B01J,Y02T

Abstract:
A method for removing NO.sub.x from a gas, said method comprising:(a) contacting air and fuel at an air to fuel ratio of 22:1 to produce a combustible mixture,(b) combusting said combustible mixture to produce said gas, and(c) contacting said gas with a catalyst component to break down at least about 30% NOx in said gas, wherein said catalyst component comprises:(1) a carrier comprising a metal containing silicate which is a crystalline porous material containing at least Al as a framework forming element;(2) a noble metal active component carried on said carrier, said noble metal active component having catalytic activity and being selected from the group consisting of Pt, Rh and Ir; and(3) .gamma.-Al.sub.2 O.sub.3 and CeO.sub.2 as co-catalyst components.