Shock-tube pyrolysis of chlorinated hydrocarbons: Formation of soot

Frenklach, M; Hsu, J P; Miller, D L; Matula, R A

doi:10.1016/0010-2180(86)90051-9

Title: Shock-tube pyrolysis of chlorinated hydrocarbons: Formation of soot

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Abstract

Soot formation in pyrolysis of chlorinated methanes, their mixtures with methane, and chlorinated ethylenes were studied behind reflected shock waves by monitoring the attenuation of an He-Ne laser beam. An additional single-pulse shock-tube study was conducted for the pyrolysis of methane, methyl chloride, and dichloromethane. The experiments were performed at temperatures 1300-3000K, pressures 0.4-3.6 bar, and total carbon atom concentrations (1-5) x 10/sup 17/ atoms/cm/sup 3/. The amounts of soot produced in the pyrolysis of chlorinated hydrocarbons are larger than that of their nonchlorinated counterparts. The sooting behavior and product distribution can be generally explained in terms of chlorine-catalyzed chemical reaction mechanisms. The pathway to soot from chlorinated methanes and ethylenes with high H:Cl ratio proceeds via the formation of C/sub 2/H, C/sub 2/H/sub 2/, and C/sub 2/H/sub 3/ species. For chlorinated hydrocarbons with low H:Cl ratio, the formation of C/sub 2/ and its contribution to soot formation at high temperatures becomes significant. There is evidence for the importance of CHCl radical and its reactions in the pyrolysis of dichloromethane.

Authors:: Frenklach, M; Hsu, J P; Miller, D L; Matula, R A

Publication Date:: Thu May 01 00:00:00 EDT 1986

Research Org.:: College of Engineering, Louisiana State Univ., Baton Rouge, LA 70803

OSTI Identifier:: 5331578

Resource Type:: Journal Article

Journal Name:: Combust. Flame; (United States)

Additional Journal Information:: Journal Volume: 64:2

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; ETHYLENE; PYROLYSIS PRODUCTS; METHANE; METHYL CHLORIDE; METHYLENE CHLORIDE; SOOT; CHEMICAL REACTION YIELD; ATTENUATION; CARBON; CHEMICAL REACTION KINETICS; CHLORINATION; HELIUM-NEON LASERS; HIGH TEMPERATURE; LASER SPECTROSCOPY; MEDIUM PRESSURE; MIXTURES; QUANTITY RATIO; SHOCK TUBES; SHOCK WAVES; ALKANES; ALKENES; CHEMICAL REACTIONS; CHLORINATED ALIPHATIC HYDROCARBONS; DISPERSIONS; ELEMENTS; GAS LASERS; HALOGENATED ALIPHATIC HYDROCARBONS; HALOGENATION; HYDROCARBONS; KINETICS; LASERS; NONMETALS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; REACTION KINETICS; SPECTROSCOPY; YIELDS; 400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987); 400800 - Combustion, Pyrolysis, & High-Temperature Chemistry; 500200 - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats


                    Frenklach, M, Hsu, J P, Miller, D L, and Matula, R A. Shock-tube pyrolysis of chlorinated hydrocarbons: Formation of soot.  United States: N. p., 1986. 
        Web.  doi:10.1016/0010-2180(86)90051-9.

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                    Frenklach, M, Hsu, J P, Miller, D L, & Matula, R A. Shock-tube pyrolysis of chlorinated hydrocarbons: Formation of soot.  United States.  https://doi.org/10.1016/0010-2180(86)90051-9

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                    Frenklach, M, Hsu, J P, Miller, D L, and Matula, R A. 1986.  
        "Shock-tube pyrolysis of chlorinated hydrocarbons: Formation of soot".  United States.  https://doi.org/10.1016/0010-2180(86)90051-9.

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@article{osti_5331578,

  title        = {Shock-tube pyrolysis of chlorinated hydrocarbons: Formation of soot},

  author       = {Frenklach, M and Hsu, J P and Miller, D L and Matula, R A},

  abstractNote = {Soot formation in pyrolysis of chlorinated methanes, their mixtures with methane, and chlorinated ethylenes were studied behind reflected shock waves by monitoring the attenuation of an He-Ne laser beam. An additional single-pulse shock-tube study was conducted for the pyrolysis of methane, methyl chloride, and dichloromethane. The experiments were performed at temperatures 1300-3000K, pressures 0.4-3.6 bar, and total carbon atom concentrations (1-5) x 10/sup 17/ atoms/cm/sup 3/. The amounts of soot produced in the pyrolysis of chlorinated hydrocarbons are larger than that of their nonchlorinated counterparts. The sooting behavior and product distribution can be generally explained in terms of chlorine-catalyzed chemical reaction mechanisms. The pathway to soot from chlorinated methanes and ethylenes with high H:Cl ratio proceeds via the formation of C/sub 2/H, C/sub 2/H/sub 2/, and C/sub 2/H/sub 3/ species. For chlorinated hydrocarbons with low H:Cl ratio, the formation of C/sub 2/ and its contribution to soot formation at high temperatures becomes significant. There is evidence for the importance of CHCl radical and its reactions in the pyrolysis of dichloromethane.},

  doi          = {10.1016/0010-2180(86)90051-9},

  url          = {https://www.osti.gov/biblio/5331578},
  journal      = {Combust. Flame; (United States)},
number       = ,

  volume       = 64:2,

  place        = {United States},

  year         = {Thu May 01 00:00:00 EDT 1986},

  month        = {Thu May 01 00:00:00 EDT 1986}

}

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