Firing (Calcination) Process and Method Related to Metallic Substrates Coated with ZPGM Catalyst
First Claim
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1. A method of controlling a firing cycle for use with catalytics, comprising:
- providing at least one substrate;
depositing a washcoat suitable for deposition on the substrate, the washcoat comprising at least one oxide solid further comprising at least one carrier metal oxide;
calcinating the washcoat through at least one first heating and at least one second heating;
depositing an overcoat suitable for deposition on the substrate, the overcoat comprising at least one oxygen storage material and at least one ZPGM catalyst;
wherein the at least one ZPGM catalyst comprises at least one spinel structured compound having the formula AB2O4, wherein each of A and B is selected from the group consisting of at least one of copper and cerium; and
wherein one of the at least one carrier material oxide is a mixed metal oxide.
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Abstract
The effect of firing (calcination) cycle on metallic substrates in ZPGM catalyst systems is disclosed. ZPGM catalyst samples with washcoat and overcoat are separately fired in a normal, slow and fast firing cycles to determine the optimal firing cycling that may provide an enhanced catalyst performance, as well as the minimal loss of washcoat adhesion from the samples.
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Citations
20 Claims
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1. A method of controlling a firing cycle for use with catalytics, comprising:
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providing at least one substrate; depositing a washcoat suitable for deposition on the substrate, the washcoat comprising at least one oxide solid further comprising at least one carrier metal oxide; calcinating the washcoat through at least one first heating and at least one second heating; depositing an overcoat suitable for deposition on the substrate, the overcoat comprising at least one oxygen storage material and at least one ZPGM catalyst; wherein the at least one ZPGM catalyst comprises at least one spinel structured compound having the formula AB2O4, wherein each of A and B is selected from the group consisting of at least one of copper and cerium; and wherein one of the at least one carrier material oxide is a mixed metal oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of controlling a firing cycle for use with catalytics, comprising:
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providing at least one substrate; depositing a washcoat suitable for deposition on the substrate, the washcoat comprising at least one oxide solid further comprising at least one carrier metal oxide; calcinating the washcoat through at least one heating, wherein the at least one heating is from about room temperature to about 550°
C. and wherein the temperature of about 550°
C. is held for about 4 hours;depositing an overcoat suitable for deposition on the substrate, the overcoat comprising at least one oxygen storage material and at least one ZPGM catalyst; wherein the at least one ZPGM catalyst comprises at least one spinel structured compound having the formula AB2O4, wherein each of A and B is selected from the group consisting of at least one of copper and cerium; and wherein one of the at least one carrier material oxide is a mixed metal oxide. - View Dependent Claims (20)
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Specification