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Octane Requirement Increase Control - A New Way of Saving
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Abstract
Due to the accumulation of deposits in the combustion chamber, the “appetite” of an engine for octane increases with mileage. Depending on the type of engine, driving conditions, and gasoline, this octane requirement increase (ORI) ranges from 3 to 10 octane numbers.
Because of ORI, national specifications for octane number of gasoline must be based on engines' octane requirement at equilibrium. Applying the incremental analysis technique to refining economics, F. Bernasconi calculated that the incremental cost of producing each extra octane number by refining ranges from $2 to $6 per ton. It is generally well accepted that an increase of one octane number will lead to a loss in refinery yield of 4 to 6%.
Octane requirement increase can be controlled with a new type of ashless, non-metallic additive. An ORI reduction of 50 to 80% has been observed, opening the route to decreasing national gasoline octane specifications. Savings of millions of dollars and up to 20% of crude are possible. Emissions are reduced.
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Nelson, M., Larson, J., and Carruthers, M., "Octane Requirement Increase Control - A New Way of Saving," SAE Technical Paper 911739, 1991, https://doi.org/10.4271/911739.Also In
References
- Orelup J.W. Lee O.J. Ind. & Eng. Chem 17 731 1925
- Dumont L.F. SAE Quarterly Transactions 5 4 565 Oct 1951
- Benson J.D. SAE Paper # 750933 Detroit 1975
- Kalghati G.T. SAE Paper # 902105 Tulsa 1990
- Williams D. 3rd CEC Symposium Paper 7F Paris 1989
- Taylor M.A. Vincent M.W. 3rd CEC Symposium Paper 5F Paris 1989
- Lewis R.A. et al 2nd International Pacific Conference on Automotive Engineering SAE Paper # 830938 Tokyo 1983
- Nelson O.L. Jr. Larson J.E. et al SAE Paper # 890214 Detroit 1989
- Shore L.B. Ockert K.F. SAE Transactions 66 285 1958
- Saillant R.B. Pedrys F.J. Kidder M.E. SAE Paper # 760195
- Franklin T.M. Stambaugh R.L. Kuhn R.R. SAE Paper#720-942 1972
- Bernasconi F. 205
- Bernasconi F. 403 1986
- Vervalin C.H. Hydrocarbon Processing 23 Oct 1989