Dual dispersed MOx-CuOx/Co3O4 supported metal oxide catalysts for direct NOx decomposition
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsTorin C. Peck, Benjamin A. Grayson, Charles A. Roberts
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Abstract
A catalyst for direct decomposition removal of NOx from an exhaust gas stream to N2 and O2, the catalyst comprising a dual dispersed supported metal oxide material, which comprises MOx-CuOx dispersed on a CO3O4 spinel oxide support, wherein M is selected from the group consisting of Zn, Ce, Mg, Tb, and Gd. The dual dispersed supported metal oxide catalysts have good activity and selectivity for N2.
Claims20
A catalyst for direct decomposition removal of NOx from an exhaust gas stream to N2 and O2, the catalyst comprising a dual dispersed supported metal oxide material, which comprises MOx-CuOx dispersed on a Co3O4 spinel oxide support, wherein
- M is selected from the group consisting of Zn, Ce, Mg, Tb, and Gd and is present in an amount from about 0.1 wt % to about 5.0 wt %,
- Cu is present in an amount from about 1.0 wt % to about 5.0 wt %, and
- wherein the amount of M and/or Cu does not exceed 7 wt %.
A catalytic converter, comprising:
- a body defining a chamber, the body having an inlet to receive an exhaust gas stream into the chamber, and an outlet to allow the exhaust gas stream to exit the body;
- and
- a catalyst arranged in the chamber for direct decomposition removal of NOx from exhaust gas stream, the catalyst comprising a dual dispersed supported metal oxide material, which comprises MOx-CuOx on a Co3O4 spinel oxide support, wherein
- M is selected from the group consisting of Zn, Ce, Mg, Tb, and Gd and is present in an amount from about 0.1 wt % to about 5.0 wt %,
- Cu is present in an amount from about 1.0 wt % to about 5.0 wt %, and
- wherein the amount of M and/or Cu does not exceed 7 wt %.
A method for direct decomposition removal of NOx from an exhaust gas stream, the method comprising:
- exposing an exhaust gas having NOx to a catalyst which comprises a catalyst comprising a dual dispersed supported metal oxide, which comprises MOx-CuOx on a Co3O4 spinel oxide support, wherein
- M is selected from the group consisting of Zn, Ce, Mg, Tb, and Gd and is present in an amount from about 0.1 wt % to about 5.0 wt %,
- Cu is present in an amount from about 1.0 wt % to about 5.0 wt %, and
- wherein the amount of M and/or Cu does not exceed 7 wt %.
Dependencies are inferred from the claim text.