This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Autoignition Characteristics of Ethanol
Annotation ability available
Sector:
Language:
English
Abstract
The autoignition characteristics of ethanol were examined in the 667-743 K temperature range at one atmosphere. A closed static reactor testing facility, of the Le Chatelier type was employed in this study. The autoignition limits for two ethanol concentrations at varied oxygen-nitrogen concentrations are mapped out. At each fuel concentration the minimum autoignition temperature occurred at an equivalence ratio of 0.3. An Arrhenius-type expression for the ignition delay time was developed and yielded a global activation energy of 42.1 kcal/mol. Increases in ethanol and oxygen concentrations cause a decrease in ignition delay time. Ethanol concentrations proved to have a greater effect on the ignition delay times than did oxygen concentrations.
Recommended Content
Authors
Topic
Citation
Bollentin, J. and Wilk, R., "Autoignition Characteristics of Ethanol," SAE Technical Paper 961175, 1996, https://doi.org/10.4271/961175.Also In
Alternative Fuel: Composition, Performance, Engines, and Systems
Number: SP-1181; Published: 1996-05-01
Number: SP-1181; Published: 1996-05-01
References
- Owen, K. Trevor, C. Automotive Fuels Handbook SAE Warrendale, Pa. 464 1982
- Lowery, S. O. Devota, R. S. “Exhaust Emissions from a Single-Cylinder Engine Fueled with Gasoline, Methanol, and Ethanol,” Combust. Science and Tech. 12 177 182 1976
- Setchkin, N. “Self-Ignition Temperatures of Combustible Liquids,” Journal of Research of the National Bureau of Standards 53 49 1954
- Thompson, N. “Auto-Ignition Temperatures of Flammable Liquids,” Industrial and Engineering Chemistry 21 134 139 1929
- ASTM “Standard Test Method for Autoignition Temperature of Liquid Chemicals,” E 659 - 78 1989
- Curran, J. J. Dunphy, M. P. Simmie, J. M. Westbrook, C. K. Pitz, W. J. “Shock Tube Ignition of Ethanol, Isobutene and MTBE: Experiments and Modeling,” Twenty-Fourth Symp.(Int'l) on Combustion The Combustion Institute Pittsburgh, Pa. 769 776 1992
- Norton, T. S. “The Combustion Chemistry of Simple Alcohol Fuels,” Princeton University 1990
- Lee, D. Hochgreb, S. Keck, J. C. “Autoignition of Alcohols and Ethers in a Rapid Compression Machine,” SAE Paper No. 932755 1993
- Cullis, C. F. Newitt, E. J. “The Gaseous Oxidation of Aliphatic Alcohols,” Proc. Royal Soc. London A 237 530 1956
- Cullis, C. F. Newitt, E. J. “The Gaseous Oxidation of Aliphatic Alcohols,” Proc. Royal Soc. London A 242 516 1956
- Bowman, M. J. Wilk, R. D. “Heterogeneous Surface Effects on Methanol Autoignition,” SAE Paper No. 961176 1996