| 摘要 |
PROBLEM TO BE SOLVED: To provide a honeycomb catalyst that can, while maintaining the NOx purification capability high, reduce the water absorption displacement magnitude and suppress the occurrence of cracks.SOLUTION: Provided is a honeycomb catalyst including a honeycomb unit having a plurality of through-pores divided by a partition wall and arranged along a longitudinal direction, in which the honeycomb unit comprises at least two kinds of inorganic particle and an inorganic binder, and the inorganic particle comprises a zeolite having a composition ratio SiO/AlOof less than 15 and having a CHA structure, and an oxide with a positive linear expansion coefficient other than zeolite, and the ratio (X:Y) of a volume (X) of the zeolite to a volume (Y) of the oxide is 50:50 to 80:20.SELECTED DRAWING: Figure 1 |
