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US 12,629,662 B2Granted
Selective ammonia oxidation catalyst
AssigneeBASF Mobile Emissions Catalysts LLC
InventorsYu Fen Hao, Yuejin Li, Stanley A. Roth, Jan Martin Becker, Stefan Maurer
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Abstract
The invention relates to a selective ammonia oxidation catalysts comprising a platinum group metal and a support comprising TiO2 doped with 0-10% by weight of SiO2, WO3, ZrO2, Y2O3, La2O3, or a mixture thereof. The invention further comprises methods for the manufacture of the selective ammonia oxidation catalysts, and integrated catalyst systems comprising the selective ammonia oxidation catalysts for treating an exhaust gas stream.
Claims14
A selective ammonia oxidation (AMOx) catalyst, comprising:
- a platinum group metal and a support consisting of TiO2,
- wherein the TiO2 is doped with from 0 wt. % to 10 wt. % of SiO2, ZrO2, Y2O3, La2O3, or a mixture thereof, and
- wherein the TiO2 has a BET specific surface area ranging from 9 m2/g to 25 m2/g after 10% vol H2O hydrothermal aging at 750° C. for 20 hours.
Dependencies are inferred from the claim text.