Detailed investigation of soot nanostructure: Effect of pressure

Pal Toth, Arpad B. Palotas, Terry A. Ring, Eric G. Eddings, Randy Vander Wal, Chetham K. Gaddam, Joseph Levinthal, Cristina I. Jaramillo, Joann S. Lighty

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Diesel and jet engines often operate at elevated pressures, thus the investigation of the effect of pressure on soot nanostructure may contribute to the understanding of real-world systems. In this paper preliminary results from the analysis of soot nanostructure as a function of oxidation pressure are presented. The analyzed soot was generated in premixed flames of liquid fuels: n-dodecane, m-xylene and n-butanol and oxidized under elevated pressures. Nanostructure is described via differentiating between the isotropic and nematic phases of soot particles. These phases are characterized by the polar and nematic order parameters. Along with the order parameters, the nematic phase is further characterized by graphene layer spacing and length. The structural parameters were measured by utilizing high-resolution electron microscopy and digital image analysis. The image analysis framework used in this paper is a recent development, that provided us with high-fidelity structural data. This refined methodology made drawing our conclusions possible. A significant effect of pressure was observed on soot nanostructure - increasing pressure reduced interlayer spacing and increased the average length of layers, along with altering the symmetries of the structure.

Original languageEnglish (US)
Title of host publication8th US National Combustion Meeting 2013
PublisherWestern States Section/Combustion Institute
Number of pages11
ISBN (Electronic)9781627488426
StatePublished - Jan 1 2013
Event8th US National Combustion Meeting 2013 - Park City, United States
Duration: May 19 2013May 22 2013

Publication series

Name8th US National Combustion Meeting 2013


Other8th US National Combustion Meeting 2013
Country/TerritoryUnited States
CityPark City

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Mechanical Engineering
  • Physical and Theoretical Chemistry


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