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Title: Soot formation in shock-tube pyrolysis of toluene, toluene-methanol, toluene-ethanol, and toluene-oxygen mixtures

Abstract

Soot formation during the pyrolysis of argon diluted mixtures of toluene and binary mixtures of toluene-methanol and toluene-ethanol, and during the oxidation of toluene has been studied in a reflected shock tube. Soot induction times and rates of soot formation were measured at 632.8 and 1,152.0 nm by a laser beam attenuation method and these showed an Arrhenius dependence on shock temperature. Soot yields and soot amounts were also measured. The soot yield and amount were found to decrease with the addition of methanol and ethanol to toluene, with more pronounced effects for the methanol addition. The addition of oxygen to toluene strongly suppressed soot with a shift of the soot yield to lower temperatures. This laser effect was not found during alcohol addition to the toluene and therefore an alternative route to the soot formation at lower temperatures is suggested. A kinetic model was used to interpret the experimental trends and reasonably reproduced the experimental observations. However, the lack of good quantitative agreement emphasized the urgent need in establishing reliable kinetic data and reaction pathways on the oxidation of the benzyl radical and PAH species.

Authors:
;  [1]
  1. Leeds Univ. (United Kingdom). Dept. of Fuel and Energy
Publication Date:
OSTI Identifier:
215691
Resource Type:
Journal Article
Journal Name:
Combustion and Flame
Additional Journal Information:
Journal Volume: 104; Journal Issue: 1-2; Other Information: PBD: Jan 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 10 SYNTHETIC FUELS; 02 PETROLEUM; TOLUENE; PYROLYSIS; METHANOL; SOOT; CHEMICAL REACTION YIELD; COMBUSTION KINETICS; FUEL ADDITIVES; INHIBITION; MATHEMATICAL MODELS; POLYCYCLIC AROMATIC HYDROCARBONS; ACETYLENE; GASOHOL

Citation Formats

Alexiou, A, and Williams, A. Soot formation in shock-tube pyrolysis of toluene, toluene-methanol, toluene-ethanol, and toluene-oxygen mixtures. United States: N. p., 1996. Web. doi:10.1016/0010-2180(95)00004-6.
Alexiou, A, & Williams, A. Soot formation in shock-tube pyrolysis of toluene, toluene-methanol, toluene-ethanol, and toluene-oxygen mixtures. United States. https://doi.org/10.1016/0010-2180(95)00004-6
Alexiou, A, and Williams, A. Mon . "Soot formation in shock-tube pyrolysis of toluene, toluene-methanol, toluene-ethanol, and toluene-oxygen mixtures". United States. https://doi.org/10.1016/0010-2180(95)00004-6.
@article{osti_215691,
title = {Soot formation in shock-tube pyrolysis of toluene, toluene-methanol, toluene-ethanol, and toluene-oxygen mixtures},
author = {Alexiou, A and Williams, A},
abstractNote = {Soot formation during the pyrolysis of argon diluted mixtures of toluene and binary mixtures of toluene-methanol and toluene-ethanol, and during the oxidation of toluene has been studied in a reflected shock tube. Soot induction times and rates of soot formation were measured at 632.8 and 1,152.0 nm by a laser beam attenuation method and these showed an Arrhenius dependence on shock temperature. Soot yields and soot amounts were also measured. The soot yield and amount were found to decrease with the addition of methanol and ethanol to toluene, with more pronounced effects for the methanol addition. The addition of oxygen to toluene strongly suppressed soot with a shift of the soot yield to lower temperatures. This laser effect was not found during alcohol addition to the toluene and therefore an alternative route to the soot formation at lower temperatures is suggested. A kinetic model was used to interpret the experimental trends and reasonably reproduced the experimental observations. However, the lack of good quantitative agreement emphasized the urgent need in establishing reliable kinetic data and reaction pathways on the oxidation of the benzyl radical and PAH species.},
doi = {10.1016/0010-2180(95)00004-6},
url = {https://www.osti.gov/biblio/215691}, journal = {Combustion and Flame},
number = 1-2,
volume = 104,
place = {United States},
year = {1996},
month = {1}
}