Title: Monolithic catalytic converter having fluidized abrasive particles bed for maintaining catalyst activity

Abstract: The exhaust gases from an internal combustion engine pass through a chamber which has a bed of abrasive particles in the bottom. These particles are carried across catalyst surfaces located above the bed when the exhaust gases are blown through the bed thereby reactivating the catalyzed surfaces during the operation of the engine. The abrasive particles drop back into the bed during use so that the operation is comparable to a fluidized bed. Clearance is provided between the surface of the bed of particles and the base of the catalyzed surfaces that permits a free access to the catalyzed surfaces by the particles and a return of the particles to the bed without interfering with the flow of the exhaust gases over the catalyzed surfaces.

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Inventors: Fennessy, Francis J. (East Hartford, CT, US)

Application Number: 565180
Filing Date: 1975-04-04
Publication_date: 1976-09-21
Assignee: United Technologies Corporation (Hartford, CT)
Primary Class(es): 422/178 60/299, 422/180
Other Classes:
US Patent Ref:

2222884	Nov, 1940	Stowe	23/288.
2747976	May, 1956	Houdry	23/288.
2772147	Nov, 1956	Bowen et al.	23/288.
2880079	Mar, 1959	Cornelius	23/288.
3110300	Nov, 1963	Brown et al.	23/288.
3184291	May, 1965	Calvert	23/288.
3186804	Jun, 1965	Fisher	23/288.
3307920	Mar, 1967	Barnes	23/288.
3740925	Jun, 1973	Gothard	23/288.
3754870	Aug, 1973	Carnahan et al.	23/288.

Other Refs:
Primary Examiner: Richman, Barry S.
Assistant Examiner: Garris, Bradley R.
Attorney: Warren; Charles A.