DEVELOPMENT OF MORE ACTIVE AND DURABLE AUTOMOTIVE EXHAUST CATALYSTS
In response to more stringent exhaust emission standards for post-1979 model years, beaded catalysts with improved activity and durability have been developed for vehicle emission control systems. This improvement is largely the result of modifying the characteristics of the alumina substrate. Changes in density, pore size distribution, and geometrical surface area have been coupled with improved techniques of distributing noble metals (platinum, palladium, and rhodium). Added degrees of physical and thermal stability have also been built into these "second generation" three-way (hydrocarbon, carbon monoxide, and nitrogen oxides) catalysts (TWC), without loss of catalyst performance. Evaluation procedures are described, including an oxidizing warm-up test, a TWC activity test, and a catalyst aging procedure.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
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Supplemental Notes:
- Presented at SAE Congress and Exposition, Detroit, 25-29 February 1980.
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Corporate Authors:
Society of Automotive Engineers (SAE)
400 Commonwealth Drive
Warrendale, PA United States 15096 -
Authors:
- Ernst, M V
- Kim, Gyeongjun
- Publication Date: 1980
Media Info
- Features: References;
- Pagination: 12 p.
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Serial:
- SAE Technical Paper
- Publisher: Society of Automotive Engineers (SAE)
- ISSN: 0148-7191
- EISSN: 2688-3627
- Serial URL: http://papers.sae.org/
Subject/Index Terms
- TRT Terms: Air quality management; Catalysts; Durability; Exhaust gases; Performance tests; Stability (Mechanics)
- Old TRIS Terms: Exhaust emission control; Three-way catalyst
- Subject Areas: Safety and Human Factors;
Filing Info
- Accession Number: 00389106
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: SAE 800083, HS-029 594
- Files: HSL, USDOT
- Created Date: Sep 28 1984 12:00AM