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Title:
HYDRCARBON ADSORBENT
Document Type and Number:
Japanese Patent JPH06198164
Kind Code:
A
Abstract:

PURPOSE: To provide a hydrocarbon adsorbent having satisfactory hydrocarbon adsorbing ability over a wide temp. range of exhaust gas from low temp. at the time of starting an internal-combustion engine at which moisture exists to high temp. and capable of adsorbing a large amt. of hydrocarbon from exhaust gas under high diffusion.

CONSTITUTION: A coating layer of a mixture of two or more kinds of zeolites adsorbing hydrocarbon and different from each other in crystal structure is formed on a honeycomb carrier. Powder of a mixture of at least one among mordenite, Y type zeolite, USY zeolite and β-zeolite with ZSM-5 zeolite is preferably used as the zeolites. The coating layer may be formed by coating the honeycomb carrier with a slurry of a mixture of two or more kinds of ZSM-5 zeolites different from each other in the ratio of silica to alumina.


Inventors:
HAYASHI CHIEMI
IKEDA TAKUYA
KAMIKUBO MASANORI
Application Number:
JP1992000348906
Publication Date:
July 19, 1994
Filing Date:
December 28, 1992
Export Citation:
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Assignee:
NISSAN MOTOR
International Classes:
B01J20/18; B01D53/02; (IPC1-7): B01J20/18; B01D53/02
Attorney, Agent or Firm:
杉村 暁秀 (外5名)



 
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