Formation of organic acids from propane, isooctane and toluene/isooctane flames

Three fuels (propane, isooctane and toluene/isooctane) are used for the study of the formation of organic acids from their flames. Four organic acids have been found in the combustion products: formic, acetic, propionic and isovaleric acid. These acids are formed very quickly; their concentration then generally increases to reach a maximum value, and then decreases to zero. Toluene enhances the formation of organic acids comparing to propane and isooctane. The concentration of these acids depends strongly on the air/fuel equivalence ratio. Some correlations are found between the concentration of the acids and some alcohols or aldehydes. These results are in accordance with those presented in the case of internal combustion engines.

[1]  A. Cavaliere,et al.  Autoignition of n-heptane and n-tetradecane in engine-like conditions , 1993 .

[2]  Philippe Dagaut,et al.  Experimental study of the oxidation of n-heptane in a jet stirred reactor from low to high temperature and pressures up to 40 atm , 1995 .

[3]  V. Warth,et al.  Computer-Aided Derivation of Gas-Phase Oxidation Mechanisms: Application to the Modeling of the Oxidation of n-Butane , 1998 .

[4]  E. Zervas,et al.  Emission of alcohols and carbonyl compounds from a spark ignition engine. Influence of fuel and air/fuel equivalence ratio. , 2002, Environmental science & technology.

[5]  F. Inal,et al.  Effects of equivalence ratio on species and soot concentrations in premixed n-heptane flames , 2002 .

[6]  S. Davis,et al.  Propene pyrolysis and oxidation kinetics in a flow reactor and laminar flames , 1999 .

[7]  C. Westbrook,et al.  A Comprehensive Modeling Study of iso-Octane Oxidation , 2002 .

[8]  K. Kawamura,et al.  Determination of organic acids (C1-C10) in the atmosphere, motor exhausts, and engine oils. , 1985, Environmental science & technology.

[9]  E. Zervas,et al.  C1-C5 organic acid emissions from an SI engine: influence of fuel and air/fuel equivalence ratio. , 2001, Environmental science & technology.

[10]  Richard W. Anderson,et al.  EFFECT OF FUEL STRUCTURE ON EMISSIONS FROM A SPARK-IGNITED ENGINE , 1991 .

[11]  A. Class,et al.  Thermal destruction of benzene. , 2001, Chemosphere.

[12]  E. Zervas,et al.  The Influence of Gasoline Formulation on Specific Pollutant Emissions. , 1999, Journal of the Air and Waste Management Association.

[13]  Tiziano Faravelli,et al.  A wide-range modeling study of iso-octane oxidation , 1997 .

[14]  J. C. Boettner,et al.  Kinetic study of n‐heptane oxidation , 1992 .

[15]  P. Koutrakis,et al.  Measurement of atmospheric formic and acetic acids: methods evaluation and results from field studies. , 1994, Environmental science & technology.

[16]  G R Cass,et al.  Measurement of emissions from air pollution sources. 3. C1-C29 organic compounds from fireplace combustion of wood. , 2001, Environmental science & technology.