Catalyst and method of manufacture
AssigneeGeneral Electric Company
InventorsBenjamin Hale Winkler, Dan Hancu, Daniel George Norton, Ashish Balkrishna Mhadeshwar
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Abstract
A catalyst system includes a first catalytic composition and a second catalytic composition. The first catalytic composition includes a homogeneous solid mixture, which includes a first catalytic material disposed on a first substrate. The pores of the solid mixture have an average diameter of greater than about 45 nanometers. The second catalytic composition includes at least one of a zeolite or a second catalytic material disposed on a second substrate. The second catalytic material includes an element selected from the group that includes tungsten, titanium, and vanadium.
Claims28
A catalyst system comprising:
- a first catalytic composition comprising,
- a homogeneous solid mixture containing a first catalytic material disposed on a first substrate;
- wherein pores of the solid mixture have an average diameter of greater than about 45 nanometers;
- and
- a second catalytic composition comprising at least one of,
- (i) a zeolite, or
- (ii) a second catalytic material disposed on a second substrate, the second catalytic material comprising an element selected from the group consisting of tungsten, titanium, and vanadium.
A catalyst system comprising:
- a first catalytic composition comprising,
- a first catalytic material disposed on a first substrate;
- a second catalytic composition comprising at least one of,
- (i) a zeolite, or
- (ii) a second catalytic material disposed on a second substrate, the second catalytic material comprising an element selected from the group consisting of tungsten, titanium, and vanadium;
- and
- a third catalytic composition disposed downstream from the second catalytic composition, the third catalytic composition comprising,
- a third catalytic material disposed on a third substrate, wherein the third catalytic material is selected from the group consisting of platinum, palladium, ruthenium, rubidium, osmium, and iridium.
An exhaust system comprising:
- a fuel delivery system configured to deliver a fuel to an engine;
- an exhaust stream path configured to receive an exhaust stream from the engine;
- a reductant delivery system configured to deliver a reductant to the exhaust stream path;
- and
- a catalyst system disposed in the exhaust stream path, wherein the catalyst system includes:
- a first catalytic composition comprising,
- a homogeneous solid mixture containing a first catalytic material disposed on a first substrate;
- wherein pores of the solid mixture have an average diameter of greater than about 45 nanometers;
- and
- a second catalytic composition comprising at least one of,
- (i) a zeolite, or
- (ii) a second catalytic material disposed on a second substrate, the second catalytic material comprising an element selected from the group consisting of tungsten, titanium, and vanadium.
Dependencies are inferred from the claim text.