Patent ID: 11890600
Assignee: BASF SE
Field: Chemical engineering (Chemistry)
Classification: CPC B  F  Y | IPC B  F

Claim 30:
31. A Low Temperature NOx Adsorber (LT-NA) catalyst composition comprising:
a first zeolite;
a first palladium component;
a plurality of platinum nanoparticles; and
a second zeolite,
wherein at least a portion of the first palladium component is ion-exchanged in the first zeolite,
the second zeolite is a large pore zeolite having a framework type selected from the group consisting of AFT, AFR, AFS, AFY, ASV, ATO, ATS, BEA, BEC, BOG, BPH, BSV, CAN, CON, CZP, DFO, EMT, EON, EZT, FAU, GME, GON, IFR, ISV, ITG, IWR, IWS, IWV, IWW, JSR, LTF, LTL, MAZ, MEI, MOR, MOZ, MSE, MTW, NPO, OFF, OKO, OSI, RON, RWY, SAF, SAO, SBE, SBS, SBT, SEW, SFE, SFO, SFS, SFW, SOF, SOS, STO, SSF, SSY, USI, UWY, VET and mixtures or intergrowths thereof; and, a portion of the first palladium component is ion-exchanged in the second zeolite.