| abstract |
Provided are: an alumina material containing barium sulfate; a catalyst and an adsorbent, each of which uses the alumina material containing barium sulfate; and an exhaust gas purifying catalyst exhibiting excellent NOx removal performance, which is especially suitable as a catalyst for removing harmful substances contained in an exhaust gas that is discharged from an internal combustion engine of a gasoline-powered vehicle, a diesel-powered vehicle or the like. Provided is an alumina material containing barium sulfate, which contains barium sulfate in an amount of 5-70% by mass relative to alumina, and which is characterized in that: the barium sulfate dispersed in the alumina material has an average particle diameter of 4 μm or less; the alumina has an average particle diameter of 50 μm or less; and the alumina material has a BET specific surface area of 20-250 m 2 /g. Also provided is an exhaust gas purifying catalyst or the like, which uses the alumina material containing barium sulfate. It is preferable that the alumina material containing barium sulfate is covered, as a catalyst layer, by an integrally structured carrier. |