Patent ID: 6677272
Filing Date: 2004-01-13
Classification: B01D,B01J,C04B

Abstract:
A ceramic support for a NOx trap, the ceramic support capable of supporting a catalyst washcoat which includes a high surface area carrier, a noble metal catalyst and a NOx storage component comprising an alkali metal, the ceramic support having a composition lying within a ternary system selected from the group consisting of Al2TiO5â€”MgTi2O5â€”MgAl2O4 and Al2TiO5-FeTiO5-Al2O3, the ceramic support characterized by a modulus of rupture strength as measured on a solid rod of circular cross section of greater than 1000 pounds per square inch and a coefficient of thermal expansion (22-800Â°C.) of less than 20Ã—10âˆ’7/Â°C.