This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Methane Dedicated Catalysts for Heavy-Duty Natural Gas Engines
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 01, 1996 by SAE International in United States
Annotation ability available
Three developmental catalytic converters, provided by different companies, were tested at the exhaust of a SI (spark ignition) NG (natural gas) engine for bus application. The catalysts were all based on noble metals: Pt (platinum), Pd (palladium), Rh (rhodium) and differed in size, metal loading and active phase composition.
Emission evaluation was performed according to the European ECE-R49 procedure (13 mode cycle), in stoichiometric and lean-burn conditions. In addition to regulated emission measurement, speciation of NMHC (non-methane hydrocarbons) and carbonyl compounds was performed.
The results showed that all the catalyst compositions considered allowed the European emission limits to be complied when the engine operated in stoichiometric conditions, while the overall best performance in the lean region was obtained on the catalyst with noble metal composition Pd:Rh=21:1. For NMHC and carbonyl compounds, not limited by regulation, conversion efficiency resulted always close to 100%.
About NOx (nitrogen oxides) emission in lean operation, the effect of the different noble metals on the catalyst conversion efficiency was investigated and compared with results obtained on cobalt-based de-NOx catalysts.
CitationCorbo, P., Gambino, M., and Iannaccone, S., "Methane Dedicated Catalysts for Heavy-Duty Natural Gas Engines," SAE Technical Paper 961087, 1996, https://doi.org/10.4271/961087.
Alternative Fuel: Composition, Performance, Engines, and Systems
Number: SP-1181; Published: 1996-05-01
Number: SP-1181; Published: 1996-05-01
- Unich A. Bata R. M. Lyons D. W. “Natural Gas: a Promising Fuel for I. C. Engines” SAE Paper 930929 , International Congress and Exposition Detroit, Michigan March 1-5 1993
- Gambino M. Iannaccone S. Unich A. “Light Duty and Heavy Duty Spark Ignition Engines Fueled with Methane” International Conference on the Analysis of Thermal and Energy Systems 631 641 Atene June 3-6 1991
- Gambino M. Iannaccone S. Unich A. “Heavy Duty Spark Ignition Engines Fueled with Methane” New Technology in Large Bore Engines, ASME Fall Technical Conference Rockford Illinois October 1990 Transaction of the ASME 113 o 3 359 364 July 1991
- Gambino M. Corbo P. Iannaccone S. Unich A. “Comparison between Lean-Burn and Stoichiometric Technologies for CNG Heavy-Duty Engines” SAE 950057 , SAE International Congress and Exposition Detroit, Michigan, USA February 27 March 2 1995
- Gambino M. Corbo P. Iannaccone S. Unich A. “Low Emission Stoichiometric CNG Engine with EGR” ASME Spring Conference Marietta, Ohio, USA April 23-26 1995
- Varde K. S. Patro N. Drouillard K. “Lean Burn Natural Gas Fueled S.I. Engine and Exhaust Emissions” SAE Paper 952499 , Fuels & Lubricants, Meeting & Exposition Toronto, Ontario October 16-19 1995
- Gambino M. Cericola R. Corbo P. Iannaccone S. “Carbonyl Compounds and PAH Emissions from CNG Heavy-Duty Engine” ASME I.C.E. Division 1992, Fall Technical Conference “New Developments in Off-Highway Engines” 67 71 Waterloo, Iowa U.S.A October 4-7 1992 Transaction of the ASME 115 747 749 October 1993
- Gambino M. Corbo P. Unich A. Iannaccone S. Bata R. “High Turbulence Combustion Chamber for Lean-Burn Heavy-Duty CNG Engines” ASME 1993 Fall Technical Conference “Alternate Fuels, Engine Performance and Emissions” 20 11 14 Morgantown, West Virginia USA September 26-29 1993
- Sakai T. Choi B. Osuga R. Ko Y. Kim E. “Unburned Fuel and Formaldehyde Purification Characteristics of Catalytic Converters for Natural Gas Fueled Automotive Engine” SAE Paper 920596 1995
- Ciambelli P. Corbo P. Gambino M. Migliardini F. Minelli G. Moretti G. Porta P. “The Effect of Preparation and Steaming on the Catalytic Properties of Cu- and Co-ZSM5 in Lean NOx Reduction” Studies in Surface Science and Catalysis 97 295 1995
- Newkirk M. S. Bass E. A. “Reactivity Comparison of Exhaust Emissions from Heavy-Duty Engines Operating on Gasoline, Diesel, and Alternative Fuels” SAE Paper 952442 1995
- Nichols R. J. “The Challenges of Change in the Auto Industry: Why Alternative Fuels” ASME 1993 Fall Technical Conference “Alternate Fuels, Engine Performance and Emissions” 20 3 10 Morgantown, West Virginia USA September 26-29 1993