Patent ID: 8021621

Claim:
A honeycomb structure comprising: at least one honeycomb member comprising inorganic fibers and having a longitudinal direction and walls extending along the longitudinal direction to define cells which are sealed at either one end; a catalyst provided on the wall, an amount of the catalyst being at least about 100 g and at most about 400 g per liter of volume of the honeycomb structure, the honeycomb member having a pore distribution measured using mercury porosimetry in which a pore distribution curve has a first peak in a range from about 0.005 μm to about 0.03 μm of a pore diameter, a second peak in a range from about 1 μm to about 15 μm of the pore diameter, and a third peak in a range from about 15 μm to about 50 μm of the pore diameter, the pore distribution curve being drawn by plotting the pore diameter (μm) on an X-axis and a log differential pore volume (mL/g) on a Y-axis.