Patent ID: 6887815

Claim:
A porous material for catalytic conversion of exhaust gases comprising a carrier with a first porous structure enclosing an oxidation catalyst (OX), consisting essentially of iron (Fe) and silver (Ag), which in the presence of oxygen and according to a first reaction has the ability to catalyze oxidation of nitrogen monoxide into nitrogen dioxide and, according to a second reaction, to catalyze oxidation of a reducing agent (HC), said porous material further comprising: a carrier with a second porous structure having located therein a reduction catalyst (RED) that in the presence of the reducing agent (HC) is able to selectively catalyze reduction of nitrogen dioxide into nitrogen, the second porous structure having dimensions such that the reducing agent (HC) can come into contact with the reduction catalyst (RED) in order to enable a third reaction to take place wherein the reducing agent (HC) participates and is at least partially consumed.