Emission control system for the selective catalytic reduction of nitrogen oxides, process and use

摘要

Exhaust gas purification system for the selective catalytic reduction of nitrogen oxides comprising a first catalyst element for selective catalytic reduction and a second catalyst element, characterized in that the first catalyst element is a full catalyst and the second catalyst element is a coating catalyst which comprises a metallic catalyst carrier body, the coating of which is a catalytically active metal VIII. Subgroup contains, wherein the first catalyst element and the second catalyst element are present separately from one another in a component.