Porous material, method and arrangement for catalytic conversion of exhaust gases

A porous material for catalytic conversion of exhaust gas, said porous material comprising:

• a coating layer including a carrier with a first porous structure enclosing an oxidation catalyst (OX) comprising 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 provided in the same coating layer as the first porous structure, the 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.

A porous material for catalytic conversion of exhaust gases, said porous material comprising:

• a carrier with a first porous structure comprising a first zeolite enclosing an oxidation catalyst (OX) comprising 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 comprising a second zeolite, such that the porous material comprises a physical mixture of the first zeolite and the second zeolite that has 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.