| abstract |
An oxidation catalyst comprises an extruded solid bodycomprising:10-100% by weight of at least one binder/matrix component;5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein:(i) a majority of the at least one precious metal is located at a surface of the extruded solid body;(ii) the at least one precious metal is carried in one or more coating layer(s) on a surface of the extruded solid body;(iii) at least one metal is present throughout the extruded solid body and is also present in a higher concentration at a surface of the extruded solid body;(iv) at least one metal is present throughout the extruded solid body and is also carried in one or more coating layer(s) on a surface of the extruded solid body; or(v) at least one metal is present throughout the extruded solid body, is present in a higher concentration at a surface of the extruded solid body and is also carried in one or more coating layer(s) on the surface of the extruded solid body. |