초록 ▼

A catalyst composition contains a catalytic material having having an undercoat layer containing a mixture of a fine particulate undercoat refractory metal oxide and a sol such as a silica sol, the undercoat providing good adherence to substrates, such as metal substrates, on which the catalytic mat

A catalyst composition contains a catalytic material having having an undercoat layer containing a mixture of a fine particulate undercoat refractory metal oxide and a sol such as a silica sol, the undercoat providing good adherence to substrates, such as metal substrates, on which the catalytic material is disposed. An overlayer is coated over the underlayer and contains an overlayer refractory metal oxide, which may be the same as or different from the undercoat refractory metal oxide, and on which is dispersed one or more catalytic metal components, such as palladium and manganese components. The metal substrate may be made of, e.g., aluminum or titanium or alloys thereof, and provides a low pressure drop and lightweight catalyst, making the catalyst especially well adapted for use in aircraft to abate ozone in cabin air. A method of making the catalyst composition includes applying the undercoat to the substrate and calcining it, impregnating the overlayer refractory metal oxide with one or more catalytic metal components and depositing the overlayer over the undercoat, and calcining it.

대표청구항 ▼

A method for abating a noxious substance contained in air which method comprises contacting air containing such noxious substance with a catalyst composition comprising a catalytic material coated on a substrate, the catalytic material comprising: (a) an undercoat layer comprising a mixture of a fin

A method for abating a noxious substance contained in air which method comprises contacting air containing such noxious substance with a catalyst composition comprising a catalytic material coated on a substrate, the catalytic material comprising: (a) an undercoat layer comprising a mixture of a fine particulate refractory metal oxide and a sol selected from the class consisting of one or more of silica, alumina, zirconia and titania sols; and (b) an overlayer comprising a refractory metal oxide support on which is dispersed at least one catalytic metal component.