This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Relationship Between Gasoline Anti-knock Agents, Gasoline Aromatics Content and SI Engine Emissions
Annotation ability available
Sector:
Language:
English
Abstract
Six different gasoline blends with different antiknock agents and aromatics content were investigated for its influence on SI engine nitrogen-oxides and carbon monoxide emissions at part-load operating conditions. The six fuel types used were leaded gasoline with 0.5 g Pb/l, commercial unleaded gasoline, unleaded synthetic gasoline and its blends with different proportions of methyl tertiary butyl ether MTBE (10, 15 and 20 vol%).
A four- stroke, four- cylinder, spark- ignition Fiat engine (type 138 B 3.000) was used for conducting this study. The exhaust gases were analyzed for nitrogen-oxides and carbon monoxide emitted at part-load operating conditions for the speed range of 1000 to 3000 rpm. The results of this investgation have shown that blending unleaded synthetic gasoline with ethers such as MTBE reduces the aromatic content of the fuel. The 20 vol% MTBE-fuel blend gave the lowest carbon monoxide emissions of all blends used at part load condition. On the other hand, the 10 vol% MTBE-fuel blend gave the lowest nitrogen-oxides emission of all blends at part-load condition. The carbon monoxide concentration in engine exhaust differs between increase and decrease at part-load condition when fuel aromatics content increases. It was also found that as the gasoline aromatics content increases in the blend, the nitrogen-oxides concentration in engine exhaust increases.
So, substitution of MTBE for the higher aromatics gasoline blends may help improving state environment and air quality.
Recommended Content
Technical Paper | Technical and Economical Aspects of Methanol as an Automotive Fuel |
Technical Paper | A Survey of Alcohol as a Motor Fuel |
Authors
Citation
Osman, M., "Relationship Between Gasoline Anti-knock Agents, Gasoline Aromatics Content and SI Engine Emissions," SAE Technical Paper 961225, 1996, https://doi.org/10.4271/961225.Also In
References
- Unzelman, G.H. U.S. Clean Air Act expands role for oxygenates; Oxygenates for the Future-1 Oil & Gas Journal Apr. 15 1991 44 48
- Taljaard, H.C. Jaardaan, C.F.P. Botha, J.J. The effect of Oxygen Content in Different Oxygenate-Gasoline Blends on Performance and Emission in A Single Cylinder, Spark Ignition Engine SAE Paper 910379 1991
- Peyla, R.J. Additives to have key role in new gasoline era Oil & Gas Journal Feb. 11 1991 53 57
- Unzelman, G.H. Ethers have good gasoline-blending attributes; Ethers in gasoline-1 Oil & Gas Journal Apr. 10 1989 33 37
- Unzelman, G.H. Ethers will play larger role in octane, environmental specifications for gasoline blends; Ethers in Gasoline- Conclusion Oil & Gas Journal Apr. 17 1989 44 50
- Kazuo. K. Hirota, T. Yakushiji, K. Oda, K. Iwakiri, Y. Akutsu, Y. Effect of Reformulated Gasoline and Methanol on Exhaust Emissions SAE Paper 912431 1991
- Osmam, M.M. Matar, M.S. Koriesh, S. Effect of Methyl Tertiary Butyl Ether (MTBE) as a Gasoline Additive on Engine Performance and Exhaust Emission Alexandria Engineering Journal Oct. 1992 31 4
- Newhall, H.K. “Kinetics of Engine-Generated Nitrogen Oxides and Carbon Monoxide,” Proceedings of Twelfth International Symposium on Combustion 603 613 Mono of Maryland 1968
- Hilliard, J.C. Wheeler, R.W. Nitrogen Dioxide in Engine Exhaust SAE Paper 790691 , SAE Trans. 88 1979
- Toda, T. Nohira, H. Kabashi, K. Evaluation of Burened Gas Ratio (BGR) as a Predominant Factor to NO x SAE Paper 760765 , SAE Trans. 85 1976
- Plee, S.L. Myers, J.P. Ahmed, T. “Flame Temperature Correlation for the Effects of Exhaust Gas Recirculation on Diesel Particulate and NO x Emissions,” SAE paper 811195 , SAE Trans. 90 1981