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US 12,723,531 B2Granted
Catalyzed soot filter with reduced ammonia oxidation
AssigneeBASF Mobile Emissions Catalysts LLC
InventorsKevin Hallstrom, David Youngren, Yuejin Li
Life of this patent
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AssigneeBASF Mobile Emissions Catalysts LLC
InventorsKevin Hallstrom, David Youngren, Yuejin Li
Estimating the term…
The present disclosure is directed to a system for treating an exhaust gas stream from an engine, which includes a diesel oxidation catalyst (DOC) located downstream of the engine and adapted for oxidation of hydrocarbons and carbon monoxide, an injector adapted for the addition of a reductant to the exhaust gas stream located downstream of the DOC, a catalyzed soot filter (CSF) located downstream of the injector, and a selective catalytic reduction component adapted for the oxidation of nitrogen oxides located downstream of the CSF. The CSF is adapted for oxidizing hydrocarbons and includes a selective oxidation catalyst composition on a filter with high selectivity ratio for hydrocarbon oxidation:ammonia oxidation (e.g., at least 0.6).
A catalyzed soot filter (CSF) comprising a selective oxidation catalyst composition on a filter, wherein the selective oxidation catalyst composition has a selectivity for oxidizing HC versus oxidizing ammonia, wherein the selective oxidation catalyst composition is substantially free of platinum,
A catalyzed soot filter (CSF) comprising a selective oxidation catalyst composition on a filter, wherein the selective oxidation catalyst composition has a selectivity for oxidizing HC versus oxidizing ammonia, wherein the selective oxidation catalyst composition is substantially free of platinum,
Dependencies are inferred from the claim text.