Catalyst for the reduction of oxides of nitrogen
AssigneeNorton Company
InventorsWilliam H. Gerdes, Charles Lim, Thomas Szymanski
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Abstract
A catalyst for the selective reduction of nitrogen oxides to nitrogen in the presence of ammonia in the form of composite bodies formed from a mixture of zirconia (5 to 50% by weight), a zeolite (50 to 90%), a bond material (0 to 30%), and, optionally, a promoter selected from oxides of vanadium and copper in the amount of at least 0.1% by weight.
Claims9
A catalyst for the selective reduction of NOx to nitrogen in the presence of ammonia, said catalyst being a shaped coformed mixture of 5 to 50% by weight of zirconia starting material having a surface area of at least 10, preferably greater than 50 square meters per gram and containing at least 50 to 90% of one or more zeolites in the hydrogen or ammonium form and up to 30% of a bonding agent.
Dependencies are inferred from the claim text.