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US 12,403,425 B2Granted
Exhaust gas treatment system
AssigneesJohnson Matthey Public Limited Company, GM Global Technology Operations LLC
InventorsCeren Aydin, Patrick Bannon, Penelope Markatou, Dennis Murray, Rahul Mital, Eric Darvin Thomas
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Abstract
Methods and systems related to an exhaust gas treatment system including, in order: (i) a first means for injecting a nitrogenous reductant; (ii) a first selective catalytic reduction (SCR) catalyst; (iii) an ammonia slip catalyst (ASC); and (iv) a second selective catalytic reduction (SCR) catalyst, wherein the ASC comprises an SCR catalyst and a supported palladium (Pd) component.
Claims14
An exhaust gas treatment system comprising, in order:
- (i) a first means for injecting a nitrogenous reductant;
- (ii) a first selective catalytic reduction (SCR) catalyst;
- (iii) an ammonia slip catalyst (ASC);
- and
- (iv) a second selective catalytic reduction (SCR) catalyst,
- wherein the ASC comprises an SCR catalyst and a supported Palladium (Pd) component, and
- wherein the exhaust gas treatment system does not include a means for injecting a nitrogenous reductant downstream of the first selective catalytic reduction catalyst (SCR).
4 more elements
Dependencies are inferred from the claim text.