Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Mixture is exhaust from internal-combustion engine
Patent
1995-11-08
1999-11-30
Griffin, Steven P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Mixture is exhaust from internal-combustion engine
4232135, 4232391, 4232453, 423247, 423659, 4234372, B01D 5356, B01D 5394
Patent
active
059937629
ABSTRACT:
A reaction comprising the oxidation of carbon monoxide to carbon dioxide, eg in vehicle exhausts, employs a catalyst composed of metal oxide, eg. ceria, particles among which are uniformly incorporated noble metal particles, the particles having such a high interaction that, without hydrogen reduction pre-treatment, the catalyst exhibits the formation of anionic vacancies on the metal oxide surface at a temperature lower than does the corresponding catalyst prepared by impregnation. The catalyst employed is preferably prepared by co-precipitation.
REFERENCES:
patent: 2030283 (1936-02-01), De Rewal
patent: 3173957 (1965-03-01), McDaniel et al.
patent: 3878131 (1975-04-01), Hayes
patent: 4149998 (1979-04-01), Tauster et al.
patent: 4683219 (1987-07-01), Cotton et al.
patent: 4937219 (1990-06-01), Haruta et al.
patent: 5051394 (1991-09-01), Haruta
patent: 5202300 (1993-04-01), Funabiki et al.
patent: 5516741 (1996-05-01), Gascoyne
Gmelin Handbuch der Anorganischen Chemie, pp. 78-81 (1974) (with translation of excerpts).
Journal of Catalyst, `The Oxidation of CO and Hydrocarbons over Noble Metal Catalysts`, Yao, 87, (1984), pp. 152-162.
Journal of Catalysts, `Ceria in Automotive Exhaust Catalysts`, Yao et al., 86, (1984), pp. 254-265.
Catalysis and Automotive Pollution Control II, `The Role of Ceria in Three-Way Catalysts`, edited by A. Crucq, published by Elsevier Science Publishers B.V., Amsterdam (1991), pp. 139-152.
J. Chem. Soc. Faraday Trans., 1991, 87(17), `Carbon Dioxide Hydrogenation over Au/ZrO.sub.2 Catalysts from Amorphous Precursors: Catalytic Reaction Mechanism`, Koeppel et al., pp. 2821-2828.
Journal of Catalysts, `Comparison of the Performance Characteristics of Pt/SnO.sub.x and Au/MnO.sub.x Catalysts for Low-Temperature CO Oxidation`, Gardner et al., 129, (1991), pp. 114-120.
Journal of Catalysts, `CO Oxidation over Pd and Cu Catalysts`, Choi et al., 127, (1991), pp. 465-488.
Successful Design of Catalysts, `Fine Structure of Novel Gold Catalysts Prepared by Coprecipitation`, edited by T. Inui, published by Elsevier Science Publishers B.V., Amsterdam (1988) pp. 33-42.
Ansell Graham P.
Hatcher Helen A.
Hayes John W.
Rajaram Raj R.
DiMauro Peter
Griffin Steven P.
Johnson Matthey Public Limited Company
LandOfFree
Method of using catalyst containing noble metal and cerium dioxi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of using catalyst containing noble metal and cerium dioxi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of using catalyst containing noble metal and cerium dioxi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1667822