EXHAUST GAS PURIFICATION APPARATUS

摘要

This exhaust gas purification apparatus is provided with: a wall flow structure base material with entry cells, exit cells, and porous partitions (16); first catalytic sections (20) formed in small pores (18a) of relatively small pore diameter among the internal pores of the partitions (16); and second catalytic sections (30) formed in large pores (18b) of relatively large pore diameter among the internal pores of the partitions (16). The first catalytic sections (20) contain a carrier and one or two kinds of precious metals among Pt, Pd and Rh, the precious metals being loaded on said carrier. The second catalytic sections (30) contain a carrier and a precious metal, which is one or two kinds of precious metals among Pt, Pd and Rh, the precious metals being loaded on said carrier, and which at least differs from the precious metal(s) contained in the first catalytic sections (20).