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Portrait of Reine Wallenberg. Photo: Kennet Ruona

Reine Wallenberg

Professor, Coordinator Materials Science

Portrait of Reine Wallenberg. Photo: Kennet Ruona

Measurements of structures and concentrations of carbon particle species in premixed flames by the use of in-situ wide angle X-ray scattering

Author

  • Frederik Ossler
  • Sophie E. Canton
  • Reine Wallenberg
  • Anders Engdahl
  • Soenke Seifert
  • Jan P. Hessler
  • Robert S. Tranter

Summary, in English

In-situ wide-angle X-ray scattering (WAXS) measurements have been conducted on atmosphericpressure fuel-rich premixed freely propagating ethylene/oxygen flames with argon and nitrogen dilution. In this work, a novel analysis methodology able to provide quantitative information on soot/carbon particle species and concentrations was tested under heavy sooting conditions. The particle composition and concentrations were retrieved by fitting theoretical calculations of structural components from major molecular and nanometric species to the experimental WAXS data. The results show that argon dilution yields predominantly graphene-like components that are less stacked and amorphous carbon that is less structured than under nitrogen dilution. This finding was later confirmed by electron microscopy analysis on samples extracted from similar flames. In addition, the WAXS showed that most of the carbon present in the flames was bound as particles. These results constitute some of the first in-situ observations on structures and concentrations of carbon species in laboratory burner flames operating without stabilization plates. (C) 2015 Elsevier Ltd. All rights reserved.

Department/s

  • Combustion Physics
  • Centre for Analysis and Synthesis
  • MAX IV Laboratory

Publishing year

2016

Language

English

Pages

782-798

Publication/Series

Carbon

Volume

96

Document type

Journal article

Publisher

Elsevier

Topic

  • Materials Chemistry

Status

Published

ISBN/ISSN/Other

  • ISSN: 0008-6223