| abstract |
A honeycomb catalyst having excellent NOx purification performance and capable of suppressing breakage of a honeycomb unit during use of an exhaust gas purification device is provided. A honeycomb catalyst including a honeycomb unit in which a plurality of through holes are arranged in parallel in a longitudinal direction with a partition wall therebetween, wherein the honeycomb unit includes zeolite, inorganic particles, and an inorganic binder. , An aluminosilicate having a CHA structure, the composition ratio Si / Al of 15 to 50, and the inorganic particles are oxides having a positive thermal expansion coefficient, and the volume ratio of the zeolite and the inorganic particles ( A honeycomb catalyst characterized in that the ratio of zeolite: inorganic particles is 50:50 to 90:10. [Selection] Figure 1 |