Oxidation catalyst and method for destruction of CO, VOC and halogenated VOC
AssigneeSub-Chemie Inc.
InventorsZhongyuan Dang, Nirmal Singh, Martin Morrill, Greg Cullen
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Abstract
An oxidation catalyst deposited on a substrate is described for the destruction of CO and volatile organic compounds, in particular halogenated organic compounds, from an emissions stream at temperatures from 250° C. to 450° C. The oxidation catalyst includes at least two platinum group metals, one of which is either platinum or ruthenium, supported on refractory oxides, such as a solid solution of CeO2 and ZrO2, and tin oxide and/or silica.
Claims20
An oxidation catalyst for the destruction of CO and volatile organic compounds, in particular halogenated organic compounds, from an emissions stream, wherein the oxidation catalyst comprises
- at least two platinum group metals, one of which comprises ruthenium or platinum,
- a refractory oxides support comprising a solid solution of CeO2 and ZrO2;
- and
- tin oxide having a surface area from about 2 m2/g to 200 m2/g and a particle size from about 1 to 20 micrometers.
A process for the production of an oxidation catalyst deposited on a substrate for the destruction of CO and volatile organic compounds, in particular halogenated organic compounds, from an emissions stream comprising
- preparing an aqueous mixture slurry comprising a solid solution of CeO2 and ZrO2, and one or both members selected from the group consisting of tin oxide and silica to form a mixture;
- blending the mixture;
- coating a substrate with the blended mixture;
- drying and calcining the coated substrate;
- depositing at least two platinum group metal precursor materials, comprising at least one of platinum and ruthenium, on the calcined coated substrate;
- and
- drying and calcining the platinum group metals coated substrate.
A process for the production of an oxidation catalyst for the destruction of CO and volatile organic compounds, in particular halogenated organic compounds, from an emissions stream comprising
- depositing at least two precious metal precursors on at least one component comprising a solid solution of CeO2 and ZrO2, and one or both members selected from the group consisting of tin oxide and silica to form a mixture;
- blending the mixture;
- coating a substrate with the blended mixture;
- drying and calcining the coated substrate.
An oxidation catalyst for the destruction of CO and volatile organic compounds, in particular halogenated organic compounds, from an emissions stream, wherein the oxidation catalyst comprises
- at least two platinum group metals, comprising ruthenium and platinum, wherein the ratio of ruthenium to platinum is 20 to 1 to 1 to 20,
- a refractory oxides support comprising a solid solution of CeO2 and ZrO2;
- and
- one or both members selected from the group consisting of silica and tin oxide.
Dependencies are inferred from the claim text.