FT-IR and {sup 1}H NMR characterization of the products of an ethylene inverse diffusion flame

Journal Article · Sat Jul 15 04:00:00 EDT 2006 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2006.04.008· OSTI ID:20829577

Santamaria, Alexander; Mondragon, Fanor ^[1]; Molina, Alejandro ^[2]; Marsh, Nathan D; Eddings, Eric G; Sarofim, Adel F ^[3]

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1. Institute of Chemistry, University of Antioquia, A.A. 1226, Medellin (Colombia)
2. Combustion Research Facility, Sandia National Laboratories, Livermore, CA 94551 (United States)
3. Department of Chemical Engineering, University of Utah, Salt Lake City, UT 84112 (United States)

Knowledge of the chemical structure of young soot and its precursors is very useful in the understanding of the paths leading to soot particle inception. This paper presents analyses of the chemical functional groups, based on FT-IR and {sup 1}H NMR spectroscopy of the products obtained in an ethylene inverse diffusion flame. The trends in the data indicate that the soluble fraction of the soot becomes progressively more aromatic and less aliphatic as the height above the burner increases. Results from {sup 1}H NMR spectra of the chloroform-soluble soot samples taken at different heights above the burner corroborate the infrared results based on proton chemical shifts (Ha, H{alpha}, H{beta}, and H{gamma}). The results indicate that the aliphatic {beta} and {gamma} hydrogens suffered the most drastic reduction, while the aromatic character increased considerably with height, particularly in the first half of the flame. (author)

• OSTI ID: 20829577
• Journal Information: Combustion and Flame, Journal Name: Combustion and Flame Journal Issue: 1-2 Vol. 146; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
CHEMICAL ANALYSIS
CHEMICAL SHIFT
COMBUSTION
ETHYLENE
FOURIER TRANSFORMATION
INFRARED SPECTRA
NUCLEAR MAGNETIC RESONANCE
PROTONS
SOOT
SYNTHESIS