Chemical effects in vaporizing synthetic fuels. Final report, June 23-November 30, 1981. [Tetradecane]
Chemical changes that occur during fuel vaporization were investigated experimentally in this program. Analytical techniques were developed to characterize fuels and reaction products. The major components of SRC-II middle distillate MD and fuel decomposition products were polycyclic aromatic hydrocarbons (PAH). Capillary gas chromatography was the preferred method of analysis for identifying and quantifying PAH. Decomposition of SRC-II MD under surface vaporizing conditions was studied as a function of temperature (heating rate), vapor phase residence time, and oxygen level. Decomposition was found to be greatest at low temperature. Boiling mode did not appear to affect the extent of decomposition. Decomposition was weakly related to chemical class and strongly related to component volatility. The effect of gas phase residence time and oxygen level were negligible at the conditions studied. A droplet vaporization apparatus was used to study the decomposition of SRC-II MD, No. 2 fuel oil, and n-tetradecane as a function of temperature, vapor-phase residence time, droplet spacing, and oxygen level. Emphasis was placed on formation of PAH, soot, and light pyrolysis products. The light gases accounted for nearly all of the fuel carbon prior to the onset of sooting. PAH concentrations maximized at the onset of sooting. The major PAH species found in the condensed decomposition products were phenanthrene, fluoranthene, pyrene, and cyclopenta(cd)pyrene. PAH levels were a function of temperature and residence time. PAH products distributions were a function of droplet spacing due to reduced heat transfer. The concentrations of all hydrocarbon decomposition products were decreased by the addition of oxygen. 9 references, 24 figures, 13 tables.
- Research Organization:
- United Technologies Research Center, East Hartford, CT (USA)
- DOE Contract Number:
- AC22-81PC40278
- OSTI ID:
- 5164560
- Report Number(s):
- DOE/PC/40278-T5; ON: DE84000923
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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ALKANES
EVAPORATION
PYROLYSIS
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POLYCYCLIC AROMATIC HYDROCARBONS
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SYNTHETIC FUELS
DROPLETS
EXPERIMENTAL DATA
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