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Molecular Structure and Component Blending Effects on Knock Related Chemistry
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Abstract
Atmospheric pressure flow reactor experiments were conducted on the oxidation and pyrolysis of n-octane and iso-octane and the oxidation of blends of iso-octane and n-heptane have led to the conclusions that a) the difference in knocking tendency of fuels may result primarily from the comparative oxidation rates of the intermediates rather than the rate of attack on the initial fuel molecule, b) certain small unsaturated hydrocarbons interfere with the oxidation of other intermediates and serve as model compounds for the development of octane number enhancers, c) high temperature homogeneous oxidation chemistry of n-heptane/iso-octane mixtures and single component paraffin fuels can be correlated with the global phenomena of octane number measurement in a test engine, d) the contribution of thermal and oxidative processes to the rapid decay of the initial fuel can be evaluated from rate parameters from pyrolysis studies of pure hydrocarbon fuels.
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Brezinsky, K. and Dryer, F., "Molecular Structure and Component Blending Effects on Knock Related Chemistry," SAE Technical Paper 872109, 1987, https://doi.org/10.4271/872109.Also In
References
- Dryer F.L. “High Temperature Oxidation of CO and CH4 in a Turbulent Flow Reactor” Ph.D thesis Princeton University 1972 AMS Report 1034
- Brezinsky K. Litzinger T.A. Classman I. “The High Temperature Oxidation of the Methyl Side Chain of Toluene” Int. J. Chem. Kin. 16 1053 1984
- Dryer F.L. Brezinsky K. “A Flow Reactor Study of N-Octane and Iso- Octane” Comb. Sci. and Tech. 45 199 1986
- Brezinsky K. Dryer F.L. “A Flow Reactor Study of the Oxidation of Iso-Butylene and an Iso-Butylene/N-Octane Mixture” Comb. Sci. and Tech. 45 225 1986
- Kennedy S.P. Brezinsky K. Dryer F.L. “Flow Reactor Oxidation Studies of the Extent of Reaction in Heptane/Iso Octane Mixtures as a Function of Octane Number” Eastern States Section/The Combustion Institute paper #69 November 1985
- Kennedy S.P. “The High Temperature Flow Reactor Oxidation of n-Heptane/iso-Octane Mixtures as a Study of Autoignition Characteristics” Senior Thesis Department of Chemical Engineering, Princeton University 1986
- Brezinsky K. Dryer F.L. “The High Temperature Pyrolysis of N-Octane and Iso-Octane” Western States Section/The Combustion Institute paper #3-5A April 1985
- Chang C. “A Flow Reactor Study of the Pyrolysis of N-Octane and Iso-Octane” Senior Thesis Department of Mechanical and Aerospace Engineering, Princeton University 1985
- Axelsson E.I. Brezinsky K. Dryer F.L. Pitz W.J. Westbrook O.K. “Chemical Kinetic Modeling of the Oxidation of Large Alkane Fuels: N-Octane and Iso-Octane” The Twenty-First International Symposium on Combustion 1987
- Bernstein B. “A Kinetic Study of the Pyrolysis of N-Octane and Iso-Octane” Senior Thesis Department of Chemical Engineering, Princeton University 1987
- Laidler K.J. Chemical Kinetics McGraw Hill New York 1965
- Benson S.W. Thermochemical Kinetics Wiley New York 1976
- Pitz W.J. Westbrook C.K. “Chemical Kinetics of the High Pressure Oxidation of n-Butane and Its Relation to Engine Knock” Comb. Flame 63 113 1986