Catalytic Articles, Systems And Methods For The Oxidation Of Nitric Oxide
Patent No. EP2948654 (titled "Catalytic Articles, Systems And Methods For The Oxidation Of Nitric Oxide") was filed by Basf on Jan 28, 2014. The application was issued on Aug 20, 2025.
Patent Summary
This catalytic article for treating lean burn engine exhaust gas comprises a honeycomb substrate with a washcoat containing one or more calcined platinum group metal (PGM) components dispersed on a refractory metal oxide support. The support consists of alumina, silica, zirconia, titania, or their physical mixtures, chemical combinations, or atomically doped combinations. The PGM components comprise Pt, or Pt and Pd in a weight ratio of Pt:Pd > 2, with an average crystallite size of 15 nm to 20 nm as determined by CO chemisorption. The article is designed to provide a stable $\text{NO}_2/\text{NO}_x$ ratio (typically 0.3 to 0.6) to optimize downstream selective catalytic reduction (SCR) efficiency, minimizing variance from a target value by less than $\pm 10\%$ (specifically $\pm 5\%$) over the application's life.
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Date
Description
EP2948654
- Application Number
- EP14742965A
- Filing Date
- Jan 28, 2014
- Status
- Granted And Under Opposition
- Jul 18, 2025
- Publication Date
- Aug 20, 2025
- External Links
- Slate, Register , Google Patents