Umicore Ag & Co Kg

Christoph Reith

Christoph Hengst

Michael Schiffer

Michael Seyler

Birgit Friedrich

The present invention relates to a diesel oxidizing catalytic converter which comprises a supporting body with a length L which extends between a first end surface a and a second end surface b, and catalytically active material zones A and B of different composition which are arranged on the supporting body, wherein &#x2014;material zone A comprises palladium or platinum and palladium in a weight ratio Pt:Pd of &#x3c;1 and, starting from the end surface a, extends to from 20% to 80% of the length L, and &#x2014;material zone B comprises platinum and palladium in a weight ratio Pt:Pd of &#x3c;10 and extends to from 80% to 100% of the length L, and wherein material zone B is arranged above material zone A and the weight ratio Pt:Pd in relation to the material zones A and B is from 1.5 to 3.0.

Diesel oxidizing catalytic converter

The present invention relates to a catalyst that comprises a carrier body with a length L, which extends between a first end face 'a' and a second end face 'b', and differently composed, catalytically-active material zones A, B, and C arranged on the carrier body, wherein

Catalyst for purifying the exhaust gases of diesel engines

The invention relates to the possibility of improving selective catalytic reduction (SCR), which is the selective reaction of nitrogen oxides with ammonia in the exhaust gas of combustion processes on an exhaust-gas catalytic converter suitable therefor&#x2014;the SCR catalytic converter. For this purpose, materials used in the catalytic converter for storing ammonia are distributed on the catalyst carrier in such a way that, viewed in the flow direction, a region having low ammonia storage capacity is followed by a region of higher ammonia storage capacity.

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Motten, Germany

Christoph Reith