COMPLEX SELECTIVE CATALYTIC REDUCTION CATALYST

摘要

The present invention relates to: a complex selective catalytic reduction (SCR) catalyst having a double-layer structure in which a V2O5/TiO2 layer is formed as an upper or lower layer and a zeolite layer containing metal is formed as a lower or upper layer, or a complex SCR catalyst having a single-layer structure formed from a mixture of V2O5/TiO2 and zeolite containing metal; and an SCR catalyst having improved occlusion of ammonia capable of efficiently converting NOx into a harmless component in an acceleration and deceleration section of a diesel engine and an exhaust system having improved diesel engine exhaust gas purification, especially purification of nitride oxides at low temperatures by using the same.