MIXED CATALYST FOR NOx REDUCTION AND METHODS OF MANUFACTURE THEREOF

A method of making a catalyst, comprising:

• combining a first catalyst composition, a second catalyst composition, and a binder to form an intermediate catalytic composition;
• the first catalyst composition comprising a zeolite;
• the second catalyst composition comprising a catalytic metal disposed upon a porous inorganic material, wherein the porous inorganic material is a metal oxide, an inorganic oxide, an inorganic carbide, an inorganic nitride, an inorganic hydroxide, an inorganic oxide having a hydroxide coating, an inorganic carbonitride, an inorganic oxynitride, an inorganic boride, an inorganic borocarbide, or a combination comprising at least one of the foregoing inorganic materials;
• and
• forming the intermediate catalytic composition into a foam or extrudate.

A method of reducing NOx comprising:

• exposing an exhaust gas stream comprising NOx to a catalyst;
• the catalyst comprising a binder and a catalytic composition, the catalytic composition comprising:
• a first catalyst composition that comprises a zeolite;
• and
• a second catalyst composition that comprises a catalytic metal disposed upon a porous inorganic material, wherein the porous inorganic material is a metal oxide, an inorganic oxide, an inorganic carbide, an inorganic nitride, an inorganic hydroxide, an inorganic oxide having a hydroxide coating, an inorganic carbonitride, an inorganic oxynitride, an inorganic boride, an inorganic borocarbide, or a combination comprising at least one of the foregoing inorganic materials;
• the first catalyst composition and the second catalyst composition being mixed together to form a mixture;
• wherein the catalyst in the form of an extrudate or foam.