Polymerization catalyst enhanced hydrocarbon trapping process

Details Polymerization catalyst enhanced hydrocarbon trapping process Polymerization catalyst enhanced hydrocarbon trapping process

1997-11-13

1998-09-29

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

423212, 4232132, 4232135, 4232451, B01D 5302, B01D 5394, B01D 5372

Patent

active

058142878

ABSTRACT:
This invention is directed to a catalyst system for treating internal combustion engine exhaust gases, the system having enhanced hydrocarbon trapping efficiency which is particularly advantageous during cold start. The system comprises a hydrocarbon polymerization catalyst, a hydrocarbon trap located downstream of the hydrocarbon (HC) polymerization catalyst, advanced exhaust treatment catalyst. The hydrocarbon polymerization catalyst is capable of forming larger (HC) molecules from smaller HC molecules.

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