The Oxygen Ratio: A Fuel-Independent Measure of Mixture Stoichiometry

Mueller, C J; Musculus, M P; Pickett, L M; Pitz, W J; Westbrook, C K

Title: The Oxygen Ratio: A Fuel-Independent Measure of Mixture Stoichiometry

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Abstract

The pollutant-formation characteristics and other properties of a combustion reaction typically depend strongly on the proximity of the mixture to its stoichiometric condition, i.e., the ''mixture stoichiometry.'' A quantitative, widely applicable measure of this mixture property is therefore a critical independent variable in the study of combustion systems. Such a parameter enables the clear separation of mixture stoichiometry effects from other effects (e.g., fuel molecular structure, product temperature, diluent concentration, pressure). The parameter most often used to quantify mixture stoichiometry is the equivalence ratio. Unfortunately, the equivalence ratio fails to properly account for oxygen in oxygenates, i.e., compounds that have oxygen chemically bound within the fuel molecule. This manuscript introduces the oxygen ratio, a parameter that properly characterizes mixture stoichiometry for a broader class of reactants than does the equivalence ratio, including oxygenates. A detailed definition of the oxygen ratio is provided and used to show its relationship to the equivalence ratio. The definition is also used to quantify errors involved when the equivalence ratio is used as a measure of mixture stoichiometry with oxygenates. Proper usage of the oxygen ratio is discussed and the oxygen ratio is used to interpret results in a practical example.

Authors:: Mueller, C J; Musculus, M P; Pickett, L M; Pitz, W J; Westbrook, C K

Publication Date:: Fri Dec 19 00:00:00 EST 2003

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 15013775

Report Number(s):: UCRL-CONF-201583
TRN: US200803%%778

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Conference

Resource Relation:: Conference: Presented at: 30th International Symposium on Combustion, Chicago, IL, United States, Jul 25 - Jul 30, 2004

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 20 FOSSIL-FUELED POWER PLANTS; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILITZATION; COMBUSTION; MIXTURES; MOLECULAR STRUCTURE; OXYGEN; STOICHIOMETRY

Citation Formats


                    Mueller, C J, Musculus, M P, Pickett, L M, Pitz, W J, and Westbrook, C K. The Oxygen Ratio: A Fuel-Independent Measure of Mixture Stoichiometry.  United States: N. p., 2003. 
        Web.

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                    Mueller, C J, Musculus, M P, Pickett, L M, Pitz, W J, & Westbrook, C K. The Oxygen Ratio: A Fuel-Independent Measure of Mixture Stoichiometry.  United States.

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                    Mueller, C J, Musculus, M P, Pickett, L M, Pitz, W J, and Westbrook, C K. 2003.  
        "The Oxygen Ratio: A Fuel-Independent Measure of Mixture Stoichiometry".  United States.  https://www.osti.gov/servlets/purl/15013775.

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@article{osti_15013775,

  title        = {The Oxygen Ratio: A Fuel-Independent Measure of Mixture Stoichiometry},

  author       = {Mueller, C J and Musculus, M P and Pickett, L M and Pitz, W J and Westbrook, C K},

  abstractNote = {The pollutant-formation characteristics and other properties of a combustion reaction typically depend strongly on the proximity of the mixture to its stoichiometric condition, i.e., the ''mixture stoichiometry.'' A quantitative, widely applicable measure of this mixture property is therefore a critical independent variable in the study of combustion systems. Such a parameter enables the clear separation of mixture stoichiometry effects from other effects (e.g., fuel molecular structure, product temperature, diluent concentration, pressure). The parameter most often used to quantify mixture stoichiometry is the equivalence ratio. Unfortunately, the equivalence ratio fails to properly account for oxygen in oxygenates, i.e., compounds that have oxygen chemically bound within the fuel molecule. This manuscript introduces the oxygen ratio, a parameter that properly characterizes mixture stoichiometry for a broader class of reactants than does the equivalence ratio, including oxygenates. A detailed definition of the oxygen ratio is provided and used to show its relationship to the equivalence ratio. The definition is also used to quantify errors involved when the equivalence ratio is used as a measure of mixture stoichiometry with oxygenates. Proper usage of the oxygen ratio is discussed and the oxygen ratio is used to interpret results in a practical example.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/15013775},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Dec 19 00:00:00 EST 2003},

  month        = {Fri Dec 19 00:00:00 EST 2003}

}

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