The Kinetics of Pollutant Formation in Spark-Ignition Engines

  • H. K. Newhall


Consideration of chemical equilibrium thermodynamics within the context of the spark-ignition engine cycle leads to the expectation that fuel and air should be converted completely to carbon dioxide and water. Thus, the observed appearance in exhaust gases of significant quantities of such undesirable components as unburned hydrocarbons, nitric oxide (and carbon monoxide under chemically correct or fuel-lean conditions), points to a deviation from the equilibrium situation, and implies the significance of rate controlling chemical reactions during the course of engine cycle events. Such reactions are directly responsible for the emission of exhaust pollutants. For this reason the study of mechanisms and processes responsible for pollutant formation and/or destruction necessarily includes detailed consideration of the field of chemical reaction rate theory or chemical kinetics.


Nitric Oxide Combustion Chamber Chemical Equilibrium Elementary Reaction Engine Cycle 
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Copyright information

© Plenum Press New York 1973

Authors and Affiliations

  • H. K. Newhall
    • 1
  1. 1.Mechanical Engineering DepartmentUniversity of WisconsinMadisonUSA

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