Patent ID: 7927551

Claim:
A catalytic body comprising: a porous honeycomb structure including partition walls defining a plurality of cells acting as fluid passages which extend through the honeycomb structure from one end surface to the other end surface thereof, the plurality of cells comprises cells at first positions and cells at second positions, the first positions and the second positions are arranged alternately, the honeycomb structure being formed of at least one of: (a) a catalytic substance comprising at least one of titania, tungsten oxide, vanadium oxide, and zeolite; and (b) a substance comprising at least one oxide selected from the group consisting of alumina, ceria, titania, silica, and zirconia, and at least one noble metal carried on the at least one oxide and selected from the group consisting of silver, platinum, rhodium, and palladium; wherein 10% or more of said plurality of cells are plugged by plugging parts formed at least either at one end or a middle portion of the fluid passages, pore diameter distribution of the partition walls is 0.2 to 0.6, an average pore diameter of said honeycomb structure is 40 μm or more, cells at the first positions include plugging ports at both ends of the fluid passages thereof, and cells at the second positions include plugging ports in the middle portion of the fluid passages thereof.