HONEYCOMB STRUCTURE AND EXHAUST GAS PURIFICATION APPARATUS

摘要

Disclosed is a honeycomb structure which comprises a honeycomb unit that contains a phosphate-based zeolite and an inorganic binder, while having a plurality of through pores that are separated by partition walls and arranged side by side in the longitudinal direction. The zeolite contains a zeolite which is ion-exchanged with one or more first metals selected from the group consisting of Cu, Mn, Ag and V, and a zeolite which is ion-exchanged with one or more second metals selected from the group consisting of Fe, Ti and Co. In the honeycomb unit, the mass content of the first metals is higher than the mass content of the second metals in a first region that is not less than 30% but not more than 70% of the entire length of the honeycomb unit from one end in the longitudinal direction, and the mass content of the second metals is higher than the mass content of the first metals in a second region that is the region other than the first region of the honeycomb unit.