The effect of oxygenate molecular structure on soot production in direct-injection diesel engines.

Westbrook, Charles K. (Lawrence Livermore National Laboratory, Livermore, CA) ; Pitz, William J. (Lawrence Livermore National Laboratory, Livermore, CA) ; Mueller, Charles J. ; Martin, Glen M. ; Pickett, Lyle M.

Sandia National Laboratories

关键词: Combustion;    Soot-Environmental Aspects.;    Diesel Fuels;    Oxygen;    Soot Diesel Motor-Combustion.;   

DOI  :  10.2172/918204
RP-ID  :  SAND2003-8207
RP-ID  :  AC04-94AL85000
RP-ID  :  918204

美国|英语

来源: UNT Digital Library

【 摘 要 】

A combined experimental and kinetic modeling study of soot formation in diesel engine combustion has been used to study the addition of oxygenated species to diesel fuel to reduce soot emissions. This work indicates that the primary role of oxygen atoms in the fuel mixture is to reduce the levels of carbon atoms available for soot formation by fixing them in the form of CO or COz. When the structure of the oxygenate leads to prompt and direct formation of CO2, the oxygenate is less effective in reducing soot production than in cases when all fuel-bound 0 atoms produce only CO. The kinetic and molecular structure principles leading to this conclusion are described.