Soot formation from premixed ethylene and benzene flames

Carlos A. Echavarria, A. Sarofim, Z. Yang, J. Lighty, A. D'Anna

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The main purpose of this study was to investigate the particle size distributions (PSD) from a flat-flame burner fueled with benzene and ethylene and compare these results to a simulation. Transmission electron microscopy (TEM) measurements are also reported to show the characteristics of the particles. Temperature and PSD were measured using thermocouple particle densitometry (TPD) and a scanning mobility particle sizer (SMPS, over the size range of 3 to 80nm) respectively. Samples for TEM analysis were obtained using a rapid insertion sampling technique. A detailed kinetic mechanism was used to model the experimental data. The model includes reaction pathways leading to the formation of nano-sized particles and their coagulation to larger soot particles by using a discrete-sectional approach for the gas-to-particle process. Good predictions of particle-phase concentrations and particle sizes in the two flames are obtained without any change to the kinetic scheme. In agreement with experimental data, the model predicts a higher formation of particulate in the benzene flame respect to the ethylene flame. Furthermore the model predicts that in the ethylene flame small precursor particles dominate the particulate loading in the whole flame whereas soot is the major component in the benzene flame.

Original languageEnglish
Title of host publication2007 AIChE Annual Meeting
StatePublished - 2007
Event2007 AIChE Annual Meeting - Salt Lake City, UT, United States
Duration: 4 Nov 20079 Nov 2007

Publication series

NameAIChE Annual Meeting, Conference Proceedings

Conference

Conference2007 AIChE Annual Meeting
Country/TerritoryUnited States
CitySalt Lake City, UT
Period4/11/079/11/07

Keywords

  • Model
  • Particles size distribution
  • Soot
  • Distribution
  • Particles size

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