Ceramic catalyst body

A ceramic catalyst body comprising a ceramic carrier capable of supporting a catalyst component directly on the surface of a ceramic substrate having a crystal lattice and a catalyst supported on the ceramic carrier, wherein catalyst particles are provided with a layer containing an anti-evaporation metal formed at least in part of an outer surface thereof, wherein

• the ceramic carrier has a multitude of pores capable of directly supporting the catalyst on the surface of the ceramic substrate so that a catalyst metal can be supported directly in the pores, and
• wherein one or more of the elements that constitute the ceramic substrate is substituted with an element other than a constituent element, and the ceramic carrier is capable of supporting the catalyst metal directly on the substituting element.

A ceramic catalyst body comprising a ceramic carrier capable of supporting a catalyst directly on the surface of a ceramic substrate having a crystal lattice and a catalyst component supported on the ceramic carrier, wherein a trapping component which adsorbs a catalyst poisoning component included in the gas to be purified is supported at least at the end face of the carrier in the upstream of the flow of gas to be purified, thereby providing a trap layer that traps the catalyst poisoning component, and

• wherein one or more of the elements that constitute the ceramic substrate is substituted with an element other than a constituent element, and the ceramic carrier is capable of supporting a catalyst metal directly on the substituting element.

A ceramic catalyst body comprising a ceramic carrier capable of supporting a catalyst directly on the surface of a ceramic substrate having a crystal lattice and a catalyst component supported on the ceramic carrier, wherein a trap layer is provided at a position near an end face of the ceramic carrier in an upstream flow direction of gas to be purified so as to trap a catalyst poisoning component included in the gas to be purified, wherein

• one or more of the elements which constitute the ceramic substrate of the ceramic carrier is substituted with an element other than the constituent element, so that the carrier is capable of supporting the catalyst component directly on the substituting element.

A ceramic catalyst body comprising a ceramic carrier capable of supporting a catalyst directly on the surface of a ceramic substrate having a crystal lattice and a catalyst component supported on the ceramic carrier, wherein a trap layer is provided at a position near an end face of the ceramic carrier in an upstream flow direction of gas to be purified so as to trap a catalyst poisoning component included in the gas to be purified, wherein

• the ceramic carrier has a multitude of pores which are capable of supporting the catalyst directly on the surface of the ceramic substrate so that the catalyst component can be supported directly in the pores, and
• wherein one or more of the elements that constitute the ceramic substrate is substituted with an element other than a constituent element, and the ceramic carrier is capable of supporting a catalyst metal directly on the substituting element.