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US 10,092,897 B2Granted
Catalyst trap
AssigneeFord Global Technologies, LLC
InventorsLifeng Xu, Giovanni Cavataio, Gang Guo, Jeffrey Scott Hepburn
Life of this patent
Estimating the term…
Abstract
A catalytic converter includes a hydrocarbon catalyst trap including BEA zeolite configured to adsorb iso-octane at ambient temperatures and desorb iso-octane at temperatures between 150° C. and 170° C., and active metal supercage impregnated USY zeolite configured to adsorb and coke iso-octane at temperatures greater than 150° C.
Claims18
A catalytic converter comprising:
- a hydrocarbon catalyst trap including a trapping material disposed between a three-way catalyst and a substrate, the trapping material including:
- BEA zeolite that absorbs iso-octane at ambient temperatures and desorbs iso-octane at temperatures between 150° C. and 170° C., and
- metal supercage impregnated USY zeolite that absorbs iso-octane and cokes iso-octane at temperatures greater than 150° C.
A catalytic trap comprising:
- BEA zeolite that absorbs iso-octane at ambient temperatures and desorbs iso-octane at temperatures between 150° C. and 170° C.;
- precious metal supercage impregnated USY zeolite in contact with the BEA zeolite, and that absorbs iso-octane and cokes iso-octane at temperatures greater than 150° C.;
- and
- transition metal supercage impregnated BEA zeolite disposed upstream of the BEA zeolite and that absorbs toluene at ambient temperatures.
1 more element
A hydrocarbon and NOx catalyst trap comprising:
- a three-way catalyst including less than 20 g/ft3 of palladium;
- BEA zeolite that absorbs iso-octane at ambient temperatures and desorbs iso-octane at temperatures between 150° C. and 170° C.;
- precious metal supercage impregnated USY zeolite in contact with the BEA zeolite, and that absorbs iso-octane and cokes iso-octane at temperatures greater than 150° C.;
- and
- transition metal supercage impregnated BEA zeolite disposed upstream of the BEA zeolite and configured to adsorb toluene at ambient temperatures.
2 more elements
Dependencies are inferred from the claim text.