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The Comparative and Combined Effects of Nitric Oxide and Higher Alkanes in Sensitizing Methane Oxidation

Chan, Y. L.; Bromly, J. H.; Konnov, Alexander LU and Zhang, D. K. (2012) In Combustion Science and Technology 184(1). p.114-132
Abstract
The comparative and combined effects of nitric oxide (NO) and higher alkanes on methane oxidation were examined by experimentation and kinetic modeling. Experiments were conducted using fuel-lean, lower-alkanes mixtures with NO (0-400 ppm v/v) in an atmospheric flow reactor at residence time of 2 s over the temperature range of 820-950 K. NO was found to greatly promote methane conversion, and its sensitizing effect strengthened with the increasing concentration that was added to the system. The promoting effect of higher alkanes on methane conversion was also evident, particularly at zero or low NO concentrations. A strong dependency of the sensitizing effect on the concentration of higher alkanes present was also observed. The kinetic... (More)
The comparative and combined effects of nitric oxide (NO) and higher alkanes on methane oxidation were examined by experimentation and kinetic modeling. Experiments were conducted using fuel-lean, lower-alkanes mixtures with NO (0-400 ppm v/v) in an atmospheric flow reactor at residence time of 2 s over the temperature range of 820-950 K. NO was found to greatly promote methane conversion, and its sensitizing effect strengthened with the increasing concentration that was added to the system. The promoting effect of higher alkanes on methane conversion was also evident, particularly at zero or low NO concentrations. A strong dependency of the sensitizing effect on the concentration of higher alkanes present was also observed. The kinetic mechanism from Le Cong et al., performed reasonably well in reproducing the experimental trends. However, the sensitizing propensity of higher alkanes in the presence of NO could not be unambiguously ranked under all conditions. Modification to the kinetic mechanism of Le Cong et al., was attempted. Specifically, the submechanism of C(3) peroxy radicals was added, but the modeling results indicated a lower impact on methane conversion than was initially expected. The most sensitive reactions were revealed, and the generalized reaction pathways for methane oxidation sensitized by higher alkanes, with or without the presence of NO, were also proposed, following detailed sensitivity analysis. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Higher alkanes, Methane oxidation, Nitric oxide, Sensitization
in
Combustion Science and Technology
volume
184
issue
1
pages
114 - 132
publisher
Taylor & Francis
external identifiers
  • wos:000298379000008
  • scopus:84859787757
ISSN
1563-521X
DOI
10.1080/00102202.2011.622320
language
English
LU publication?
yes
id
9550e0f9-c7f6-469f-8ebb-c6abe5943860 (old id 2333964)
date added to LUP
2012-01-30 14:42:47
date last changed
2017-02-19 03:14:03
@article{9550e0f9-c7f6-469f-8ebb-c6abe5943860,
  abstract     = {The comparative and combined effects of nitric oxide (NO) and higher alkanes on methane oxidation were examined by experimentation and kinetic modeling. Experiments were conducted using fuel-lean, lower-alkanes mixtures with NO (0-400 ppm v/v) in an atmospheric flow reactor at residence time of 2 s over the temperature range of 820-950 K. NO was found to greatly promote methane conversion, and its sensitizing effect strengthened with the increasing concentration that was added to the system. The promoting effect of higher alkanes on methane conversion was also evident, particularly at zero or low NO concentrations. A strong dependency of the sensitizing effect on the concentration of higher alkanes present was also observed. The kinetic mechanism from Le Cong et al., performed reasonably well in reproducing the experimental trends. However, the sensitizing propensity of higher alkanes in the presence of NO could not be unambiguously ranked under all conditions. Modification to the kinetic mechanism of Le Cong et al., was attempted. Specifically, the submechanism of C(3) peroxy radicals was added, but the modeling results indicated a lower impact on methane conversion than was initially expected. The most sensitive reactions were revealed, and the generalized reaction pathways for methane oxidation sensitized by higher alkanes, with or without the presence of NO, were also proposed, following detailed sensitivity analysis.},
  author       = {Chan, Y. L. and Bromly, J. H. and Konnov, Alexander and Zhang, D. K.},
  issn         = {1563-521X},
  keyword      = {Higher alkanes,Methane oxidation,Nitric oxide,Sensitization},
  language     = {eng},
  number       = {1},
  pages        = {114--132},
  publisher    = {Taylor & Francis},
  series       = {Combustion Science and Technology},
  title        = {The Comparative and Combined Effects of Nitric Oxide and Higher Alkanes in Sensitizing Methane Oxidation},
  url          = {http://dx.doi.org/10.1080/00102202.2011.622320},
  volume       = {184},
  year         = {2012},
}