- Author
- Miller, J. H. | Mallard, W. G. | Smyth, K. C.
- Title
- Condensation of PAH During the Soot Formation Process.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Book or Conf
- Polynuclear Aromatic Hydrocarbons: International Symposium on Formation, Metabolism and Measurement, 7th. 1982, Battelle Press, Columbus, OH, Cooke, M. W. and Dennis, A. J., Editors, 921-927 p., 1982
- Keywords
- soot formation | polynuclear aromatic hydrocarbons | chemical reactions | computation | intermolecular potential | thermodynamic properties
- Identifiers
- condensation; hydrocarbon flames; physical process
- Abstract
- Soot formation in hydrocarbon flames is kinetically controlled and occurs in short times (1-10 msec to reach particle diameters of ~500 A). This constraint of rapid formation limits the possible chemical processes which may form soot. In order to choose from among these pathways, it is important to distinguish the boundary between distinct chemical steps and the physical process of condensation. At some point in the growth of large species, chemical reaction between two colliding molecules of similar size is no longer a necessary condition for sticking, i.e., the magnitude of the attractive van der Waals potentials will be sufficiently large relative to the kinetic energy of the other molecules in the bath that a dimer will be formed and will survive.