Partial premixing effects upon soot nanostructure

Chung Hsuan Huang, Randy L. Vander Wal

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Partial premixing within simple gas jet diffusion flames has a very long history – reaching back to the Bunsen flame. Yet HRTEM data of soot from such flames appears absent. Using benzene as the primary fuel with partial premixing tested the chemical path for C5 production – proceeding through partial benzene oxidation yielding the phenoxy radical followed by CO loss to produce C5. A strong variation of lamellae curvature with oxygen content in the primary fuel stream was observed – reflecting the increasing C5 production rate. Generality of the nanostructure dependence upon partial premixing and associated change in gas phase chemistry (compared to pure thermal pyrolysis) was demonstrated using an ordinary laboratory Bunsen burner with ethylene as fuel. Absent partial premixing, soot production is well described by the HACA mechanism, yielding benzenoid aromatics and soot nanostructure consisting of flat lamellae, without curvature, dissimilar to observations described here accompanying partial premixing.

Original languageEnglish (US)
Pages (from-to)403-408
Number of pages6
JournalCombustion and Flame
Volume168
DOIs
StatePublished - Jun 1 2016

Fingerprint

premixing
Soot
soot
Nanostructures
Benzene
Gases
lamella
Carbon Monoxide
flames
Fuel burners
benzene
curvature
Ethylene
Pyrolysis
History
gas jets
Oxygen
diffusion flames
burners
Oxidation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Physics and Astronomy(all)

Cite this

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abstract = "Partial premixing within simple gas jet diffusion flames has a very long history – reaching back to the Bunsen flame. Yet HRTEM data of soot from such flames appears absent. Using benzene as the primary fuel with partial premixing tested the chemical path for C5 production – proceeding through partial benzene oxidation yielding the phenoxy radical followed by CO loss to produce C5. A strong variation of lamellae curvature with oxygen content in the primary fuel stream was observed – reflecting the increasing C5 production rate. Generality of the nanostructure dependence upon partial premixing and associated change in gas phase chemistry (compared to pure thermal pyrolysis) was demonstrated using an ordinary laboratory Bunsen burner with ethylene as fuel. Absent partial premixing, soot production is well described by the HACA mechanism, yielding benzenoid aromatics and soot nanostructure consisting of flat lamellae, without curvature, dissimilar to observations described here accompanying partial premixing.",
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Partial premixing effects upon soot nanostructure. / Huang, Chung Hsuan; Vander Wal, Randy L.

In: Combustion and Flame, Vol. 168, 01.06.2016, p. 403-408.

Research output: Contribution to journalArticle

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