Patent ID: 8187691

Claim:
A honeycomb structure comprising: at least one honeycomb unit having a longitudinal direction and comprising: zeolite a content of which per apparent unit volume of the at least one honeycomb unit is about 230 g/L or greater; an inorganic binder; and plural cell walls extending from one end face to another end face along the longitudinal direction to define plural cell walls, the cell walls including pores, a porosity of pores having diameters in a range of about 0.005 μm through about 0.02 μm in the cell walls being about 5% through about 40% or less, a porosity of pores having diameters in a range of about 0.05 μm through about 0.2 μm in the cell walls being about 17.5% through about 40% or less.