| 摘要 |
PROBLEM TO BE SOLVED: To provide a honeycomb catalyst which is excellent in NOx purification performance and is capable of suppressing breakage of a honeycomb unit during the use of an exhaust gas purification device.SOLUTION: There is provided a honeycomb catalyst having a honeycomb unit in which a plurality of through-holes are provided side by side in a longitudinal direction while being separated by partition walls, wherein the honeycomb unit includes zeolite, inorganic particles and an inorganic binder, the zeolite is an aluminosilicate having a CHA structure and the composition ratio Si/Al is 15 to 50, the inorganic particles are oxides having a positive thermal expansion coefficient and the volume ratio (zeolite: inorganic particles) between the zeolite and the inorganic particles is 50:50 to 90:10. |
