Oxidation catalysts for destructing VOCs which contain light alkane compounds in emissions
AssigneeClariant International Ltd.
InventorsZhongyuan Dang, Karen Buckman, Gregory Cullen, Seyma Ortatatli
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Abstract
Disclosed herein are monolith oxidation catalysts for the destruction of CO and volatile organic compounds (VOC) chemical emissions, in particular, the destruction of light alkane organic compounds. The catalysts contain high surface area refractory oxides of silica- and hafnia-doped zirconia and silica, or tin oxide or stabilized alumina; and at least one platinum group metals, in particular platinum metal, or a combination of platinum and palladium.
Claims24
An oxidation catalyst for the destruction of CO and volatile organic compounds, including light alkane organic compounds, from an emissions stream, wherein the oxidation catalyst comprises one or more platinum group metals supported on a high surface area refractory oxide, comprising a solid solution of silica- and hafnia-doped zirconia;
- and at least one of silica, tin oxide, and stabilized alumina.
An oxidation catalyst for the destruction of CO and volatile organic compounds having light alkane organic compounds, wherein the oxidation catalyst comprises at least one of platinum metal or a combination of platinum and palladium, supported on a refractory oxide solid solution of silica- and hafnia-doped zirconia, wherein the refractory oxide solid solution is further blended with at least one of silica, tin oxide, and stabilized alumina.
A process for the production of an oxidation catalyst deposited on a substrate for the destruction of CO and volatile organic compounds, including light alkane organic compounds, from an emissions stream, the process comprising:
- preparing an aqueous mixture slurry of silica- and hafnia-doped zirconia combined with at least one of silica, tin oxide and stabilized alumina;
- blending the mixture with binders;
- coating a substrate with the blended mixture;
- drying and calcining the coated substrate;
- depositing at least platinum metal precursor materials, comprising at least one of platinum or a combination of platinum and palladium, on the calcined coated substrate;
- 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 from an emissions stream, the volatile organic compounds having light alkane organic compounds, the process comprising:
- depositing at least one platinum metal precursor on high surface area refractory oxides of silica- and hafnia-doped zirconia combined with at least one of silica, tin oxide and stabilized alumina;
- blending the mixture with binders;
- coating a substrate with the blended mixture;
- and
- drying and calcining the coated substrate.
Dependencies are inferred from the claim text.