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Kinetic Aspects of Diesel Soot Coagulation

  • George W. Smith
Part of the NATO Conference Series book series (NATOCS, volume 7)

Abstract

Recently we developed a simple physical model1 for the formation of the fundamental building blocks (spherules) which are the basis of particulate carbon agglomerates such as diesel soot (Fig. 1). This model explained the limited size range of the spherules over a wide range of formation conditions by invoking depletion of soot precursor species to limit growth and incorporating this mechanism into a homogeneous nucleation theory of particle formation. The model was able to explain the spherule size reasonably well. However, it did not include the effects of coagulation on the spherule size2, nor did it deal with kinetic aspects of diesel soot formation. In this communication we shall address both questions, assessing the influence of coalescent coagulation on spherule radius and constructing a semiquantitative view of the sequence of events for diesel soot formation. The framework around which we shall build our temporal model will be the well-developed theory of coagulation kinetics. We shall also briefly consider several explanations for the transition from coalescent to chain-forming coagulation3. A more extensive discussion will be submitted for publication elsewhere4.

Keywords

Soot Formation Particle Number Density Kinetic Aspect Combustion Institute Spherule Size 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • George W. Smith
    • 1
  1. 1.Physics DepartmentGeneral Motors Research LaboratoriesWarrenUSA

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