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IMPROVED LEAN HC CONVERSION OF TWC FOR LEAN BURN GASOLINE ENGINES
IMPROVED LEAN HC CONVERSION OF TWC FOR LEAN BURN GASOLINE ENGINES
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机译:稀燃汽油发动机中TWC的精制HC转化率得到改善
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摘要
The present invention relates to a catalyst composition comprising a carrier substrate, a layer (i) coated on said carrier substrate comprising at least one precious group metal, a layer (ii) comprising Rh, and a layer (iii) comprising Pd and/or Pt and being substantially free of Ce, Ba and Rh, wherein the layer (iii) has a lower weight than the layer (i) or the layer (ii). Furthermore, the present invention relates to a method for treating an exhaust gas stream using said catalyst composition.
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