Procedure for producing a highly porous catalyst layer consisting of a palladium or platinum alloy
AssigneeGesellschaft fur Anlagen- und Reaktorsicherheit (GRS) mbH
InventorAmiya K. Chakraborty
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Abstract
A method is described for producing a catalyst layer consisting of a metal alloy with palladium or platinum as the primary meal and at least one other meal which has a melting point lower than that of the primary meal and which forms with the primary metal homogeneous mixed crystals that are rich in the primary metal. In the method, a powder of the at least one other metal is applied first to a carrier body followed by application of a powder of the primary metal. The powders are successively applied to the carrier body in this order, with at least the powder of the primary metal being sprayed on by thermal means.
Claims16
A method for producing a catalyst layer on a carrier body, said catalyst layer comprising a metal alloy of a primary metal and one or more other metals, said primary metal being either palladium or platinum, wherein said one or more other metals have respective melting points below that of said primary metal, said alloy comprising a homogeneous solid solution of said primary metal and said one or more other metals, said method comprising the steps of:
- applying a first powder of said one or more other metals to said carrier,
- applying a second powder of said primary metal to said carrier body such that said second powder, while in liquid form, surrounds and covers discrete grains of said first powder while grains of said first powder are in liquid form so as to form said catalyst layer, and
- repeating successive application of said first powder and said second power if and as desired.
A method for producing a catalyst layer on a carrier body, said catalyst layer comprising a metal alloy of a primary metal and two or more other metals, said primary metal being either palladium or platinum, each of said other metals having respective melting points below that of said primary metal, said alloy comprising a homogeneous solid solution of said primary metal and said two or more other metals, said method comprising the steps of:
- applying to said carrier a first powder comprising at least one of said two or more other metals,
- applying to said carrier a second powder comprising said primary metal and all of said two or more other metals not included in said first powder such that said second powder, while in liquid form, surrounds and covers discrete grains of said first powder while grains of said first powder are in liquid form so as to form said catalyst layer, and
- repeating successive application of said first powder and said second powder if and as desired.
Dependencies are inferred from the claim text.