Impregnated monolith for exhaust system treatment device of automobile engine and its manufacturing process

摘要

An impregnated whole for an exhaust system treatment device of an automobile engine comprises a catalyst substrate (7) and an impregnation layer (8), which comprises at least one platinum group metal compound PGM.In addition, The impregnation layer (8) is unevenly distributed on the catalyst substrate (7), so that the amount of PGM compound in the first region (9) of the catalyst substrate (7) affected by the temperature of the first exhaust stream is greater than that in the second region (10) The temperature of the second exhaust stream is lower than that of the first.Abstract figure: Figure 3