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Catalysts for Methanol Vehicles
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English
Abstract
A Methanol catalyst test program has been conducted in two phases. The purpose of Phase I was to determine whether a base metal or lightly-loaded noble metal catalyst could reduce Methanol engine exhaust emissions with an efficiency comparable to conventional gasoline engine catalytic converters. The goal of Phase II was the reduction of aldehyde and unburned fuel emissions to very low levels by the use of noble metal catalysts with catalyst loadings higher than those in Phase I.
Catalysts tested in Phase I were evaluated as three-way converters as well as under simulated oxidation catalyst conditions. Phase II catalysts were tested as three-way converters only.
For Phase I, the most consistently efficient catalysts over the range of pollutants measured were platinum/rhodium configurations. None of the catalysts tested in Phase I were able to meet a NOx level of 1 gram per mile when operated in the oxidation mode. Testing of the heavily loaded noble metal configurations in Phase II demonstrated that the use of loadings beyond 60 grams per cubic foot of substrate did not increase catalyst efficiency for most of the pollutants. Heavily loaded platinum/rhodium configurations were much more efficient converting the range of pollutants measured than the heavily loaded silver or silver/rhodium catalysts.
Authors
Citation
Piotrowski, G. and Murrell, J., "Catalysts for Methanol Vehicles," SAE Technical Paper 872052, 1987, https://doi.org/10.4271/872052.Also In
References
- The Clean Air Act July 1981
- Speech by Charles L. Gray, Jr., EPA, QMS, OAR, to 1983 Midyear Refining Meeting of the API May 11 1983
- Policy Statement by The Honorable George Bush, Vice President of the U.S. March 6 1987
- 1975 Federal Test Procedure Code of Federal Regulations Urban Dynamometer Driving Schedule
- Highway Fuel Economy Driving Schedule Federal Register 41 100 May 21 1976
- Low Mileage Catalyst Evaluation With a Methanol-Fueled Rabbit - Interim Report Wagner, R. Landman L. EPA-AA-CTAB-83/05 May 1983
- Low Mileage Catalyst Evaluation With a Methanol-Fueled Rabbit - Second Interim Report Wagner, R. Landman L. EPA-AA-CTAB-84/03 June 1984
- Evaluation of Catalysts for Methanol-Fueled Vehicles Using a Volkswagen Rabbit Test Vehicle presented at the ASME Joint Conference On the Introduction and Development of Methanol As An Alternate Fuel Columbus, OH June 26-27 1986
- Moving America to Methanol Gray, C.L. Jr. Alson J. U of M Press Ann Arbor, MI 1985 29
- Formaldehyde Measurement in Vehicle Exhaust At MVEL Gilkey, R.L. OAR, OMS, EOD Ann Arbor, MI 1981
- Results of Methanol Catalyst Testing Analyzed For Trends in Baseline Variance Piotrowski, G.K. OAR, OMS, ECTD Ann Arbor, MI 1985