Methods and formulations for enhancing NH3 adsorption capacity of selective catalytic reduction catalysts
AssigneeFord Motor Company
InventorsHungwen Jen, George Graham, Robert McCabe
Life of this patent
Estimating the term…
Abstract
A method of providing an automobile exhaust catalyst composition. The method includes acidifying a support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition. The support composition includes a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof.
Claims20
A method of preparing an automobile exhaust gas catalyst composition, the method comprising:
- acidifying a support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition, the support composition includes a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof.
A method of preparing an automobile exhaust gas catalyst composition, the method comprising:
- providing a support composition including a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof;
- and
- acidifying the support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition.
A method of forming an SCR catalyst system comprising:
- providing a substrate;
- and
- applying a support composition and a conjugate base oxide of an inorganic acid having a Ka to the substrate to obtain an SCR catalyst system, the support composition including a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof.
Dependencies are inferred from the claim text.