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MMT Plugging of Oxidation Catalysts on Ceramic and Metal Supports During Engine Dyno Studies of Catalyst Durability
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Abstract
DURING ENGINE DYNO durability testing of oxidation catalysts, manganese deposition on the catalyst hot faces sufficient to affect catalyst performance for HC and CO conversions was observed. The severity of the problem is related to the MMT level in the fuel, the cell density of the catalyst's monolithic support, and engine aging time. The nature of manganese deposition in these studies and how it affects catalyst performance is explored.
Apart from the MMT phenomenon, comparative studies of oxidation catalysts on conventional ceramic and high cell density, thin-wall metallic supports indicate that the latter offer significantly improved HC conversion durability.
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Authors
Citation
Lichtenstein, I. and Mundy, J., "MMT Plugging of Oxidation Catalysts on Ceramic and Metal Supports During Engine Dyno Studies of Catalyst Durability," SAE Technical Paper 780005, 1978, https://doi.org/10.4271/780005.Also In
References
- Stork E. O. “Representativeness of Unleaded Service Accumulation Fuels” Mobile Source Air Pollution Control Advisory Circular #26B January 7 1977
- “Meeting(s) on Manganese Fuel Additive (MMT)” Environmental Protection Agency, Office of Mobile Source Air Pollution Control, Emission Control Technology Division Ann Arbor Michigan Jan. 20 March 29 1977
- Stork E. O. “Representativeness of Unleaded Service Accumulation Fuels” MSAPC Advisory Circular #26B-1 August 12 1977
- Dulieu C. A. et al “Metal Supported Catalysts for Automotive Applications” paper 770299 SAE International Automotive Engineering Congress and Exposition Cobo Hall, Detroit Feb. 28 March 4 1977