Growth of soot particles in counterflow diffusion flames of ethylene

J. Y. Hwang, S. H. Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

105 Scopus citations


The structures of sooting and polycyclic aromatic hydrocarbon (PAH) zones in counterflow diffusion flames have been investigated experimentally. The rate of soot mass growth is modeled, considering C2H2 addition to the surface of soot particles and coagulation of PAHs with soot particles. The results show that hydrocarbon radicals can play an important role in the activation of a soot particle's surface for C2H2 to add to it when free H atoms are nearly absent from the soot growth region. Coagulation of PAHs with soot is also important for soot growth in the low temperature region of diffusion flames, which have relatively high concentrations of PAHs. The combined mechanism of C2H2 addition to soot and PAH-soot coagulation is capable of successfully predicting the growth rate of soot particles determined experimentally.

Original languageEnglish (US)
Pages (from-to)752-762
Number of pages11
JournalCombustion and Flame
Issue number1-2
StatePublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • General Physics and Astronomy


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