Exhaust gas purifying apparatus

Details Exhaust gas purifying apparatus Exhaust gas purifying apparatus

1994-03-24

1995-10-03

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422169, 422170, 422171, 422177, 60299, 60285, 60289, B01D 5336, F01N 328

Patent

active

054550122

ABSTRACT:
In an exhaust gas purifying apparatus including first and second exhaust converters composed of a honeycomb catalytic substrate, arranged in sequence from an exhaust manifold downstream along exhaust gas flow of an engine, wherein the catalytic substrate of the first converter has a heat capacity of not exceeding 0.5 J/K per 1 cm.sup.3 in temperatures ranging from room temperature up to 300.degree. C., and the catalytic substrate of the second converter has a geometric surface area of at least 25 cm.sup.2 /cm.sup.3. The first converter purifies exhaust gas immediately after starting up and before completion of warming up of the engine, and the second converter further purifies noxious contents still remaining as being beyond capacity of the first converter.

REFERENCES:
patent: 4072471 (1978-02-01), Morgan et al.
patent: 4321792 (1982-05-01), Achard
patent: 4541995 (1985-09-01), Kim et al.
patent: 5108716 (1992-04-01), Nishizawa
patent: 5235956 (1993-08-01), Yoshizaki
patent: 5331810 (1994-07-01), Ingermann
Patent Abstracts of Japan, vol. 15, No. 473 (M-1185) Nov. 29, 1991 & JP-A-03 202 613 (Komatsu Ltd.) Sep. 4, 1991.

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