An experimental study of low-pressure premixed pyrrole/oxygen/argon flames with tunable synchrotron photoionization

Journal Article · Mon Oct 15 00:00:00 EDT 2007 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2007.06.008· OSTI ID:20961975

Tian, Zhenyu; Li, Yuyang; Zhang, Taichang; Qi, Fei ^[1]; Zhu, Aiguo; Cui, Zhifeng ^[2]

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1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029 (China)
2. Department of Physics, Anhui Normal University, Wuhu, Anhui 241000 (China)

Two premixed laminar pyrrole/oxygen/argon flames at 3.33 kPa (25 Torr) with equivalence ratios of 0.55 (C/O/N = 1:5.19:0.25) and 1.84 (C/O/N = 1:1.56:0.25) have been investigated using tunable synchrotron photoionization and molecular-beam mass spectrometry techniques. All observed flame species, including some nitrogen-containing intermediates, have been identified by measurements of photoionization efficiency spectra. Mole fraction profiles of species including reactants, intermediates, and products have been determined by scanning burner position at some selected photon energies near ionization thresholds, and flame temperature has been measured by a Pt/Pt-13% Rh thermocouple. The results indicate that N{sub 2}, NO, and NO{sub 2} are the major nitrogenous products, while hydrogen cyanide, isocyanic acid, and 2-propenenitrile are the most important nitrogen-containing intermediates in pyrrole flames. Radicals such as methyl, propargyl, allyl, cyanomethyl, n-propyl, isobutyl, cyclopentadienyl, phenyl, cyclohexyl, phenoxy, and 4-methylbenzyl are observed as well. Moreover, ethenol and methylacrylonitrile are also detected. Reaction pathways involving the major species are proposed. The new results will be useful in developing a kinetic model of nitrogenous compound combustion. (author)

• OSTI ID: 20961975
• Journal Information: Combustion and Flame, Vol. 151, Issue 1-2; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ARGON
PYRROLES
PHOTOIONIZATION
MASS SPECTROSCOPY
NITROGEN
OXYGEN
FAR ULTRAVIOLET RADIATION
LAMINAR FLAMES
REACTION INTERMEDIATES
NITROGEN DIOXIDE
HYDROCYANIC ACID
COMBUSTION
ISOCYANATES
COMBUSTION PRODUCTS
COMBUSTION PROPERTIES
RADICALS
SPECTRA
PRESSURE RANGE KILO PA