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Final Operability and Chassis Emissions Results from a Fleet of Class 6 Trucks Operating on Gas-to-Liquid Fuel and Catalyzed Diesel Particle Filters
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 24, 2005 by SAE International in United States
Annotation ability available
Six 2001 International Class 6 trucks participated in a project to determine the impact of gas-to-liquid (GTL) fuel and catalyzed diesel particle filters (DPFs) on emissions and operations from December 2003 through August 2004. The vehicles operated in Southern California and were nominally identical. Three vehicles operated “as-is” on California Air Resources Board (CARB) specification diesel fuel and no emission control devices. Three vehicles were retrofit with Johnson Matthey CCRT® (Catalyzed Continuously Regenerating Technology) filters and fueled with Shell GTL Fuel.
Two rounds of emissions tests were conducted on a chassis dynamometer over the City Suburban Heavy Vehicle Route (CSHVR) and the New York City Bus (NYCB) cycle. The CARB-fueled vehicles served as the baseline, while the GTL-fueled vehicles were tested with and without the CCRT filters. Results from the first round of testing have been reported previously (see 2004-01-2959).
The second round results were compared to the CARB specification diesel fuel baseline. Over the CSHVR cycle, the GTL Fuel (no filter) reduced oxides of nitrogen (NOx), hydrocarbon (HC), and particulate matter (PM) emissions by 13%, 46%, and 21%, respectively, and increased carbon monoxide (CO) by 11%. The GTL Fuel and the CCRT filter virtually eliminated the HC, CO, and PM emissions and reduced NOx emissions by 22%, a statistically significant reduction.
Testing over the NYCB cycle also revealed emission reductions are possible with GTL Fuel. Compared to the CARB specification diesel fuel, the GTL Fuel provided statistically significant reductions in NOx, HC, and PM emissions by 11%, 58%, and 16%, respectively. A 10% increase in CO emissions was also noted, although not statistically significant. With the CCRT filter, the HC, CO, and PM emissions were reduced by over 95%. A statistically significant NOx reduction of 20% was observed.
Reductions from round 2 were notably larger than those in round 1. To determine if the changes observed between rounds were “real”, a statistical analysis was performed. The analysis found that CO emissions were higher without the filter in round 2, while no changes were observed for HC or PM emissions. The NOx emissions were significantly higher in round 1 for the NYCB cycle only.
The fleet was followed for operability for 6 months and accumulated ∼20,000 miles. Driver feedback for the vehicles operating on the GTL Fuel and CCRT filters was very positive. An analysis determined that the fuel economy with the combination of GTL Fuel and CCRT filters decreased by 8%. Evaluation of the maintenance records did not reveal any impact of the GTL fuel or CCRT filters on operability.
- Tom Corcoran - International Truck and Engine Corporation
- Nigel Clark - West Virginia University
- W. Scott Wayne - West Virginia University
- Matt Miyasato - South Coast Air Quality Management District
- Adewale Oshinuga - South Coast Air Quality Management District
- Sougato Chatterjee - Johnson Matthey
- Todd Jacobs - Johnson Matthey
- Ralph A. Cherrillo - Shell Global Solutions (US) Inc.
- Teresa L. Alleman - National Renewable Energy Laboratory
- Robb Barnitt - National Renewable Energy Laboratory
- Leslie Eudy - National Renewable Energy Laboratory
CitationAlleman, T., Barnitt, R., Eudy, L., Miyasato, M. et al., "Final Operability and Chassis Emissions Results from a Fleet of Class 6 Trucks Operating on Gas-to-Liquid Fuel and Catalyzed Diesel Particle Filters," SAE Technical Paper 2005-01-3769, 2005, https://doi.org/10.4271/2005-01-3769.
SAE 2005 Transactions Journal of Fuels and Lubricants
Number: V114-4; Published: 2006-02-01
Number: V114-4; Published: 2006-02-01
- Alleman, T.L. McCormick, R.L. “Fischer-Tropsch Diesel Fuel - Properties and Exhaust Emissions: A Literature Review” SAE Technical Paper No. 2003-01-0763 2003
- Alleman, T.L. Eudy, L. Miyasato, M. Oshinuga, A. Allison, S. Corcoran, T. Chatterjee, S. Jacobs, T. Cherrillo, R.A. Clark, R. Virrels, I. Nine, R. Wayne, S. Lansing, R. “Fuel Property, Emission Test, and Operability Results from a Fleet of Class 6 Vehicles Operating on Gas-To-Liquid Fuel and Catalyzed Diesel Particle Filters” SAE Technical Paper No. 2004-01-2959 2004
- Eudy, L. Barnitt, R. Alleman, T.L. “Yosemite Waters Vehicle Evaluation Report, Final Results” http://www.nrel.gov/vehiclesandfuels/npbf/pdfs/38195.pdf August 2005
- Nine, R.D. Clark, N.N. Daley, J.J. Atkinson, C.M. “Development of a Heavy-Duty Chassis Dynamometer Driving Route” IMechE 213 561 575 1999
- Wang, W. Gautam, M. Sun, X. Bata, R. Clark, N. Palmer, M. Lyons, D. “Emissions Comparisons of Twenty-Six Heavy Duty Vehicles Operated on Conventional and Alternative Fuels,” SAE Technical Paper 932952 1993
- Clark, N. Gautam, M. Bata, R. Lyons, D. “Design and Operation of a New Transportable Laboratory for Emissions Testing of Heavy-Duty Trucks and Buses,” Int. Journal of Vehicle Design: Heavy Vehicle Systems 2 3/4 285 299 1995
- Wang, W. Bata, R. Lyons, D. Clark, N. Palmer, M. Gautam, M. Howell, A. Rapp, B. “Transient Response in a Dynamometer Power Absorption System,” SAE Technical Paper 920252 1992
- LeTavec, C. Uihlein, J. Vertin, K. Chatterjee, S. Wayne, S. Clark, N. Gautam, M. Thompson, G. Lyons, D. Hallstrom, K. Chandler, K. Coburn, T. “Year-Long Evaluation of Trucks and Buses Equipped with Passive Diesel Particulate Filters” SAE Technical Paper 2002-01-0433 2002
- Allansson, R. Blakeman, P.G. Cooper, B.J. Hess, H. Silcock, P.J. Walker, A.P. “Optimising the Low Temperature Performance and Regeneration Efficiency of the Continuously Regenerating Diesel Particulate Filter (CR-DPF) System” SAE Technical Paper 2002-01-0428 2002
- Code of Federal Regulations, Title 40, Part 86, Subpart N “Emission Regulations for New Otto-Cycle and Diesel Heavy-Duty Engines; Gaseous and Particulate Exhaust Test Procedures”
- McCormick, R.L. Graboski, M.S. Alleman, T.L. Alvarez, J.R. Duleep, K.G. “Quantifying the Emissions Benefit of Opacity Testing and Repair of Heavy-Duty Diesel Vehicles” Environ. Sci. Technol 37 630 637 2003