Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1999-06-04
2000-12-26
Dunn, Tom
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502303, 502304, B01J 2344
Patent
active
061659355
ABSTRACT:
The invention provides a catalyst which can convert methane, carbon monoxide, and nitrogen oxides in lean, stoichiometric, and rich air/fuel environments. Support (A) of the catalyst comprises an alumina support impregnated with Pd providing lean methane conversions and support (B) of the catalyst comprises ceria/lanthana/alumina impregnated with Pd providing stoichiometric methane conversion. Rhodium may be substituted for all or part of the Pd on an alumina support.
REFERENCES:
patent: 3956186 (1976-05-01), Iwase et al.
patent: 4782038 (1988-11-01), Gandhi et al.
patent: 4868149 (1989-09-01), Bricker
patent: 4960574 (1990-10-01), Bricker
patent: 5116800 (1992-05-01), Williamson et al.
patent: 5131224 (1992-07-01), Siewert et al.
patent: 5248650 (1993-09-01), Sekiba
patent: 5494878 (1996-02-01), Murakami et al.
patent: 5597771 (1997-01-01), Hu et al.
E. R. Becker et al., Catalyst Design for Emission Control of Carbon Monoxide and Hydrocarbons from Gas Engines, Jun. 1988, Association Dedicated to Air Pollution Control and Hazardous Waste Management Annual Meeting, pp. 1-15.
Robert F. Hicks, et al., Structure Sensitivity of Methane Oxidation over Platinum and Palladium, 1990, Journal of Catalysis, pp. 280-294. (Month of publication is not available).
Robert F. Hicks et al., Effect of Catalyst Structure on Methane Oxidation over Palladium on Alumina, 1990, Journal of Catalysis, pp. 295-306. (Month of publication is not available).
Jacob Klimstra, Catalytic Converters for Natural Gas Fueled Engines--A Measurement and Control Problem, 1987, Society of Automotive Engineers 892133, pp. 1,2. (Month of publication is not available).
Joseph T. Kummer, review of Factors Related to Natural Gas Emission Controls: Catalyst for No Decomposition under Oxygen Rich Conditions--Methane Oxidation, Feb. 1991, Gas Research Institute Natural Gas Engine Catalyst Workshop, pp. 7-16.
William E. Liss & William H. Thrasher, Natural Gas as a Stationary Engine and Vehicular Fuel, Oct. 1991, Society of Automotive Engineers 912364, pp. 43-62.
Se H. Oh. et al., Methane Oxidation over Alumina-Supported Noble Metal Catalysts with and without Cerium Additives, 1991, Journal of Catalysis, pp. 287-301. (Month of publication is not available).
J. C. Summers, Control of No.sub.x /CO/HC Emissions from Natural Gas Fueled Stationary Engines with Three-Way Catalysts, Jun. 16-21, 1991, Allied Signal AWMA Annual Meeting, pp. 1-19.
Christopher S. Weaver, Natural Gas Vehicles--A Review of the State of the Art, Sep. 1989, Society of Authomotive Engineers 892133, pp. 35-55.
W. Burton Williamson et al., Poisoning of Platinum--Rhodium Automotive Three-Way Catalysts: Behavior of Single Component Catalysts and Effects of Sulfur and Phosphorous, Mar. 1980, Enviromental Science & Technology, pp. 319-324.
Silver Ronald G.
Williamson W. Burton
ASEC Manufacturing General Partnership
Dunn Tom
LandOfFree
Palladium catalyst washcoat supports for improved methane oxidat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Palladium catalyst washcoat supports for improved methane oxidat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Palladium catalyst washcoat supports for improved methane oxidat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-994646