CATALYST FOR CLEANING EXHAUST GAS OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a catalyst for cleaning exhaust gas using a hexagonal cell-type monolith support capable of cleaning exhaust gas more excellently than a catalyst using a rectangular cell-type monolith support. SOLUTION: This catalyst is constituted of a monolith support 10 having hexagonal cells 15 in 200 meshes or more and partition walls 11 forming the cells with 25% or higher porosity and a catalyst layer 2 containing catalyst components for exhaust gas cleaning and formed on the surface of the partition walls 11 of the monolith support 10. The thickness of the catalyst layer 2 is 10-70 μm in the thinner parts 21 and the thickness of the thicker parts is not more than 12 times as thick as that of the thinner parts.