Double layer three-way catalytic converter

摘要

Two-layer, three-way catalyst (I) from an inert catalyst carrier of ceramic(s) or metal for cleaning the exhaust gases of combustion engines, is new, where: each layer contain an active aluminum oxide and a cerium/zirconium mixed oxide (A), which are catalytically activated with palladium; both oxide materials of the second layer are catalytically activated additionally with rhodium; and (A) of the second layer has high content of the zirconium oxide than (A) of the first layer.