PGM CATALYST FOR TREATING EXHAUST GAS
First Claim
Patent Images
1. A catalyst comprising:
- a. a small pore aluminosilicate molecular sieve material comprising a plurality of crystals having a surface and a porous network, wherein the small pore molecular sieve material comprises a plurality of crystals having a mean crystalline size of about 0.01 to about 10 microns, wherein said aluminosilicate molecular sieve has a framework is selected from CHA, RHO, LEV, AEI, ANA, LTA, DDR, PAU, UEI, and SOD, has a silica-to-alumina ratio of about 8 to about 150 and an alkali content of no more than about 5 weight percent based on the total weight of the aluminosilicate molecular sieve; and
b. palladium,wherein a majority amount of said palladium is embedded in said porous network relative to palladium disposed on said surface.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided are catalysts comprising a small pore molecular sieve embedded with PGM and methods for treating lean burn exhaust gas using the same.
11 Citations
26 Claims
-
1. A catalyst comprising:
-
a. a small pore aluminosilicate molecular sieve material comprising a plurality of crystals having a surface and a porous network, wherein the small pore molecular sieve material comprises a plurality of crystals having a mean crystalline size of about 0.01 to about 10 microns, wherein said aluminosilicate molecular sieve has a framework is selected from CHA, RHO, LEV, AEI, ANA, LTA, DDR, PAU, UEI, and SOD, has a silica-to-alumina ratio of about 8 to about 150 and an alkali content of no more than about 5 weight percent based on the total weight of the aluminosilicate molecular sieve; and b. palladium, wherein a majority amount of said palladium is embedded in said porous network relative to palladium disposed on said surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
- 15. The catalyst article of claim 15, wherein said substrate is a honeycomb monolith.
Specification