Pore impregnated catalyst device

Details Pore impregnated catalyst device Pore impregnated catalyst device

1992-07-21

1994-08-02

McFarlane, Anthony

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502261, 502262, 502302, 502325, 502339, 502349, 502355, 502332, 502333, 502334, 502240, 502439, B01J 3510, B01J 3702, B01J 2104, B01J 2106

Patent

active

053345703

ABSTRACT:
A porous catalyst support which may be used in a catalytic converter for treating automotive exhaust gases. The support comprises a substrate having a multichannel structure of generally thin walls and washcoat particles of colloidal particle size mainly or wholly within the pores of the walls so as to increase open frontal area and reduce back pressure. Substrate is either ceramic or metal. In a ceramic substrate with microcracks in the walls, the washcoat colloidal dispersion is free of soluble inorganic constituents and the particles do not fill the microcracks so as to prevent undesirable increase in thermal expansion and corresponding decrease in thermal shock resistance.

REFERENCES:
patent: 4412921 (1983-11-01), Leung et al.
patent: 4451517 (1984-05-01), Inoguchi et al.
patent: 4483940 (1984-11-01), Ono et al.
patent: 4831009 (1989-05-01), Retallick
patent: 5039650 (1991-08-01), Yamada et al.
Kainer, H. Interceram, vol. 40, No. 2, 1991, pp. 99-108.

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