| abstract |
Provided are an exhaust gas purification catalyst having high catalytic activity and heat resistance against particulates in diesel exhaust gas, an exhaust gas purification filter having high particulate collection efficiency, and a method for producing these exhaust gas purification catalyst and exhaust gas purification filter. The purpose is to provide. The exhaust gas purifying catalyst of the present invention comprises a metal oxide, an alkali metal sulfate, and silica, and a molar ratio of the silica to the metal oxide and the alkali metal sulfate is in the range of 0.1-6. It is characterized by doing. The exhaust gas purification catalyst is uniformly supported on the partition walls of a three-dimensional structure made of a porous material, and the average pore diameter of the pores of the partition walls is 5 to 15 μm. An exhaust gas purification filter having high catalytic activity, heat resistance, and collection efficiency is obtained by manufacturing so that the pore volume of pores exceeding 15 μm at 50% or less is 10% or less of the total pore volume. be able to. [Selection] Figure 2 |