Rectangular-channel catalytic converters

Details Rectangular-channel catalytic converters Rectangular-channel catalytic converters

1997-07-10

1999-02-02

Tran, Hein

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422177, 428116, 55523, B01D 5334

Patent

active

058660801

ABSTRACT:
Extruded rectangular-channel ceramic honeycombs wherein the channels have a rectangular cross-section of aspect ratio 1.2:1 or greater and a hydraulic diameter D.sub.h and constant temperature Nusselt Number N.sub..mu. ("shape" heat transfer characteristic) yielding an "effective" channel surface area factor N.sub..mu. /D.sub.h of at least about 70, provide catalytic substrates for engine exhaust emissions control offering better light-off performance, enhanced conversion efficiency at current converter pressure drops, and/or equivalent efficiency at reduced pressure drops.

REFERENCES:
patent: 3790654 (1974-02-01), Bagley
patent: 3885977 (1975-05-01), Lachman et al.
patent: 4127691 (1978-11-01), Frost
patent: 4731010 (1988-03-01), Cunningham
patent: 5628975 (1997-05-01), Horiuchi et al.

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