Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Patent
1995-03-16
2000-11-28
Gray, Linda L.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
423247, 4232453, B01J 804
Patent
active
06153160&
ABSTRACT:
Oxidation catalyst compositions include a catalytic material having a BET surface area of at least about 10 m.sup.2 /g and consists of a combination of bulk ceria and a bulk second metal oxide which may be one or more of titania, zirconia, ceria-zirconia, silica, alumina-silica and .alpha.-alumina. The combination may optionally also include activated alumina having a BET surface area of at least about 10 m.sup.2 /g. The ceria, second metal oxide and optional activated alumina may be mixed together or provided as discrete layers. Optionally, one of platinum or palladium metal may be dispersed on the catalytic material provided that the platinum, when used, is used in limited amounts to preclude excessive oxidation of SO.sub.2 to SO.sub.3. The catalyst compositions may be used for oxidation of oxidizeable components in a gas-borne stream, e.g., in a method to treat diesel engine exhaust by contacting the hot exhaust with the catalyst composition to promote the oxidation of the volatile organic fraction. The optional inclusion of platinum or palladium promotes the oxidation of gas phase components, e.g., hydrocarbons and carbon monoxide.
REFERENCES:
patent: 3161605 (1964-12-01), Beck et al.
patent: 3993572 (1976-11-01), Hindin et al.
patent: 4021185 (1977-05-01), Hindin et al.
patent: 4123391 (1978-10-01), Noguchi et al.
patent: 4171289 (1979-10-01), Wheelock
patent: 4189404 (1980-02-01), Keith et al.
patent: 4200552 (1980-04-01), Noguchi et al.
patent: 4477417 (1984-10-01), Domesle et al.
patent: 4492769 (1985-01-01), Blanchard et al.
patent: 4581343 (1986-04-01), Blanchard et al.
patent: 4613583 (1986-09-01), Koch et al.
patent: 4621071 (1986-11-01), Blanchard et al.
patent: 4707341 (1987-11-01), Koch et al.
patent: 4714694 (1987-12-01), Wan et al.
patent: 4749671 (1988-06-01), Saito et al.
patent: 4757045 (1988-07-01), Turner et al.
patent: 4759918 (1988-07-01), Homeier et al.
patent: 4782038 (1988-11-01), Gandhi et al.
patent: 4849399 (1989-07-01), Joy, III et al.
patent: 4857088 (1989-08-01), Mizrah et al.
patent: 4927799 (1990-05-01), Matsumoto et al.
patent: 4929581 (1990-05-01), Steinwandel et al.
patent: 5000929 (1991-03-01), Horiuchi et al.
patent: 5010051 (1991-04-01), Rudy
patent: 5059575 (1991-10-01), Jorgensen et al.
patent: 5081095 (1992-01-01), Bedford et al.
patent: 5212142 (1993-05-01), Dettling
General Chemistry, p. 489, by Charles Keenan et al., 5.sup.th Edition, 1971.
Horiuchi et al, "The Effects of Flow-Through Type Oxidation Catalysts . . . ", SAE paper 900600, Feb., 1990.
Farrauto Robert J.
Galligan Michael P.
Voss Kenneth E.
Yavuz Bulent O.
Engelhard Corporation
Gray Linda L.
Negin Richard A.
LandOfFree
Catalytic oxidation method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalytic oxidation method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalytic oxidation method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1721911