This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Paraffinic versus Olefinic Refinery Streams: An Engine Exhaust Emissions Investigation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 01, 1992 by SAE International in United States
Annotation ability available
To gain a better understanding of the exhaust emissions impact of olefins in a low aromatic, full boiling range gasoline, an evaluation of the before and after catalyst emissions of three highly olefinic refinery streams and three highly paraffinic refinery streams, blended 50/50 in motor alkylate, was conducted using a 3.1 L GM engine. The test fuels were also selected to consider the effects of volatility in addition to olefin concentration. The fuels were evaluated under three steady state engine operating conditions.
The results of the tests indicate essentially only small differences in the before and after catalyst total hydrocarbons (THC) between the pairs of highly olefinic streams and the highly paraffinic streams at relatively the same volatility level, for two of the test conditions (2400RPM-light and moderate/heavy loads. The ozone forming potentials (OFP) for these fuels, across all three speed and load conditions, also show relatively small differences. Furthermore, the results show that in general, even with large volatility differences (T50 range of 140 - 185 °F), only small differences are seen in engine out THC across the fuel set olefin range (3 - 57%). The OFP of the highly olefinic fuels did increase at the wide open throttle, high speed condition where very little catalytic oxidation took place. A low volatility olefinic stream (polymer gasoline) generated higher THC and OFP at all conditions. Mathematical modeling and artificial intelligence techniques were employed to investigate the relationship of individual fuel species and bulk fuel properties on the character of the exhaust effluent.
- W. M. Studzinski - Texaco Research & Development
- D. R. Lachowicz - Texaco Research & Development
- R. E. Paggi - Texaco Research & Development
- M. J. Christie - Ricardo Consulting Engineers, Ltd.
- O. Hadded - Ricardo Consulting Engineers, Ltd.
- C. A. Jemma - Ricardo Consulting Engineers, Ltd.
- P. R. Shore - Ricardo Consulting Engineers, Ltd.
CitationStudzinski, W., Lachowicz, D., Paggi, R., Christie, M. et al., "Paraffinic versus Olefinic Refinery Streams: An Engine Exhaust Emissions Investigation," SAE Technical Paper 922377, 1992, https://doi.org/10.4271/922377.
SAE 1992 Transactions: Journal of Fuels & Lubricants
Number: V101-4; Published: 1993-09-01
Number: V101-4; Published: 1993-09-01
- Lowi, A. Carter, W.P.L. “A Method for Evaluating the Atmospheric Ozone Impact of Actual Vehicle Emissions.” SAE 900710 1990
- Ninomiya, J.S. Golovoy, A. “Effects of Air-Fuel Ratio on Composition of Hydrocarbon Exhaust from Isooctane, Diisobutylene, Toluene and Toluene-n-Heptane Mixture.” SAE 690504 1969
- Dempster, N.M. Shore, P.R. “An Investigation into the Production of Hydrocarbon Emissions from a Gasoline Engine Tested on Chemically-Defined Fuels.” SAE 900354 1990
- Kaiser, E.W. Siegl, W.O. Honig, Y.I. Anderson, R.W. Trinker, F.H. “Effect of Fuel Structure on Emissions from a Spark Ignited Engine” Environ. Sci. Technol. 25 1991 2005 2012
- Leppard, W.R. Rapp, L.A. Burns, V.R. Gorse, R.A. Knepper, J.C. Koehl, W.J. “Effect of Gasoline Composition on Vehicle Engine-Out and Tailpipe Hydrocarbon Emissions - The Auto-Oil Air Quality Improvement Research Program” SAE 920329 1992
- Wigg, E.E. “Reactive Exhaust Emissions from Current and Future Emission Control Systems” SAE 730196 1973
- Andersson, S. Frestad, A. Dempster, N.M. Shore, P.R. “The Effect of Catalyst Ageing on the Composition of Gasoline Engine Hydrocarbon Emission” SAE 910174 1991
- Pelz, N. Dempster, N.M. Hundleby, G.E. Shore, P.R. “The Composition of Gasoline Engine Hydrocarbon Emissions - An Evaluation of Catalyst and Fuel Effects” SAE 902074 1990
- Jessup, P.J. Croudace, M.C. Wusz, T. “An Overview of Unocal's Low Emissions Gasoline Research Program” SAE 920801 1992
- Koehl, W.J. Benson, J.D. Burns, V. Gorse. R.A. Hochauser, A.M. Reuter, R.M. “Effects of Gasoline Composition and Properties on Vehicle Emissions: A Review of Prior Studies - Auto/Oil Air Quality Improvement Research Program” SAE 912321 1991
- Hochhauser, A.M. Benson, J.D. Burns, V. Gorse, R.A. Koehl, W.J. Painter, L.J. Rippon, B.M. Reuter, R.M. Rutherford, J.A. “The Effect of Aromatics, MTBE, Olefins and T90 on Mass Exhaust Emissions from Current and Older Vehicles - The Auto-Oil Air Quality Improvement Research Program” SAE 912322 1991
- Carter, W.P.L. “Draft Development of Ozone Reactivity Scales for Volatile Organic Compounds Final Report to Co-operative Agreement No. CR-814396-01-0 November 1990
- Auto/Oil Air Quality Improvement Research Program, Technical Bulletin #10 11