Catalytic converter and manufacturing method thereof
A catalytic converter includes: a three-dimensional structural support having a plurality of cells partitioned by porous cell walls, in which a pore diameter of the cell walls is 10 μm to 50 μm and porosity of the cell walls is 40 vol % or more; and a catalyst-coated layer containing a catalyst component. The catalyst-coated layer is coated on surfaces of the cell walls of the three-dimensional structural support. 50 mass % or more of a total supported amount of the catalyst component on the three-dimensional structural support is present in a region from the surfaces of the cell walls of the three-dimensional structural support to surfaces of the catalyst-coated layer.
1. A manufacturing method of a catalytic converter, the method comprising:
dispersing, in a solvent, a catalyst component and a disappearing material disappearing by heat, thereby obtaining a slurry;
coating the obtained slurry on a three-dimensional structural support having a plurality of cells partitioned by porous cell walls, in which a pore diameter of the cell walls is 10 μm to 50 μm and porosity of the cell walls is 40 vol % or more; and
baking the slurry-coated three-dimensional structural support to eliminate the disappearing material such that a catalyst-coated layer containing the catalyst component is formed on the surfaces of the cell walls of the three-dimensional structural support, and 50 mass % or more of a total supported amount of the catalyst component in the three-dimensional structural support is present on the surfaces of the cell walls.
2. The manufacturing method of the catalytic converter according to claim 1 ,
wherein the disappearing material is at least one selected from the group consisting of activated carbon, polymer resin beads, cellulose, and chaff.
3. The manufacturing method of the catalytic converter according to claim 2 ,
wherein the polymer resin beads are polystyrene beads or polypropylene beads.