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OwnerTosiharu Kondo, Masakazu Tanaka +2inventors
InventorsTosiharu Kondo, Masakazu Tanaka, Hideaki Ueno, Hiromasa Suzuki
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The present invention can realize a catalyst body which can efficiently achieve a catalytic reaction with a minimum required amount of catalyst and can exhibit high catalytic performance at low cost. According to the present invention, a catalyst component can be directly supported on the surface of a substrate ceramic and the catalyst component is directly supported on a ceramic carrier 11 having a honeycomb structure which has plural cells 2 partitioned with a cell wall 3. 90% or more of the catalyst component is supported at an outermost layer 4 of the cell wall 3, for example, the portion ranging from the surface to a depth of 30 μm or less, thereby to reduce the amount of the catalyst component which does not contribute to the purification reaction and to reduce the catalyst cost.
A catalyst body comprising a honeycomb structure carrier having plural cells partitioned with a cell wall, capable of supporting a catalyst component directly on the surface of a substrate ceramic, and the catalyst component supported on the carrier, wherein 90% or more of the catalyst component is supported at an outermost layer of the cell wall.
A method of producing a catalyst body by supporting a catalyst component directly on a honeycomb structure carrier having plural cells partitioned with a cell wall, capable of supporting directly the catalyst component on the surface of a substrate ceramic, said method comprises the steps of immersing the carrier in a water-repellent solution, removing a water-repellent material of an outermost layer of the carrier, and immersing the carrier in a catalyst solution, thereby to support the catalyst component on the outermost layer.
Dependencies are inferred from the claim text.