| 摘要 |
<p>A honeycomb structure includes a honeycomb unit containing a zeolite and an inorganic binder and having plural separating walls disposed in the longitudinal direction of the honeycomb unit, defining plural through-holes separated by the separating walls. The zeolite includes a first zeolite ion-exchanged with one or more kinds of metal selected from the group consisting of Cu, Mn, Ag, and V, and a second zeolite ion-exchanged with one or more kinds of metal selected from the group consisting of Fe, Ti, and Co. The ratio of the first zeolite by weight to a total weight of the first and second zeolites is greater at a center of the separating wall than at a surface thereof. The ratio of the second zeolite by weight to the total weight of the first and second zeolites is greater at the surface of the separating wall than at the center thereof.</p> |
