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US 11,590,482 B1Granted
Alumina binders for SCR catalysts
AssigneeJohnson Matthey Public Limited Company
InventorsStuart David Reid, Alexander Nicholas Michael Green, Guy Richard Chandler
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Abstract
Provided is a catalytic washcoat having a catalyst component and an alumina binder, wherein the catalyst component includes an aluminosilicate molecular sieve having a beta (BEA) and/or chabazite (CHA) framework, and about 1 to about 10 weight percent of a base metal component comprising iron and/or copper, wherein said weight percent is based on the weight of the aluminosilicate molecular sieve.
Claims20
A catalytic article, comprising:
- a. a honeycomb substrate;
- b. a catalyst washcoat disposed on and/or within the substrate, wherein the catalyst washcoat comprises (i) an aluminosilicate molecular sieve having at least one of a beta (BEA) and chabazite (CHA) framework, and about 1 to about 10 weight percent of at least one base metal component selected from iron and copper, wherein said weight percent is based on the weight of the aluminosilicate molecular sieve;
- and (ii) about 1 to about 30 weight percent of a binder consisting essentially of alumina, wherein said weight percent is based on the weight of the aluminosilicate molecular sieve.
A method of making a catalytic article for treating an exhaust gas comprising the steps of:
- a. providing a washcoat comprising:
- i. a catalyst comprising at least one aluminosilicate molecular sieve having at least one of a beta (BEA) and chabazite (CHA) framework, and about 1 to about 10 weight percent of at least one base metal component selected from iron and copper, wherein said weight percent is based on the weight of the aluminosilicate molecular sieve;
- and
- ii. about 1 to about 30 weight percent of a binder consisting essentially of alumina, wherein said weight percent is based on the weight of the aluminosilicate molecular sieve;
- b. applying the washcoat to a plurality of channels of a substrate;
- and
- c. drying the washcoat applied to the substrate such that the catalyst is fixed to the substrate.
4 more elements
Dependencies are inferred from the claim text.