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Nitric oxide formation in flames of NH3/DME binary mixtures : Laser-induced fluorescence measurements and detailed kinetic analysis

Alekseev, Vladimir A. LU ; Brackmann, Christian LU ; Liu, Xin LU and Nilsson, Elna J.K. LU orcid (2024) In Fuel 371.
Abstract

Binary mixture of ammonia (NH3) and dimethyl ether (DME) has been considered in literature as a potential fuel for practical use. Nitric oxide (NO) is a major product of combustion of NH3-containing fuels, and its formation routes have to be comprehensively studied. In this work, concentration profiles of NO were experimentally measured in laminar axisymmetric flames using planar laser-induced fluorescence. The molar percentage of NH3 in the NH3/DME fuel mixture varied from 10% to 60%. Emission levels of NO have reached as much as around 1% for mixtures with around 50% NH3. NO formation was analyzed with numerical simulations of 1D laminar flames and several detailed kinetic... (More)

Binary mixture of ammonia (NH3) and dimethyl ether (DME) has been considered in literature as a potential fuel for practical use. Nitric oxide (NO) is a major product of combustion of NH3-containing fuels, and its formation routes have to be comprehensively studied. In this work, concentration profiles of NO were experimentally measured in laminar axisymmetric flames using planar laser-induced fluorescence. The molar percentage of NH3 in the NH3/DME fuel mixture varied from 10% to 60%. Emission levels of NO have reached as much as around 1% for mixtures with around 50% NH3. NO formation was analyzed with numerical simulations of 1D laminar flames and several detailed kinetic mechanisms. Modeling was performed in Chemkin with the steady-state burner-stabilized and free-propagating planar laminar flame reactor models. It was observed that the most recent versions of the contemporary NH3/DME models are able to reproduce the experiments, and their predictions agree with each other due to similarities in the NH3 submechanisms. Kinetic analysis has revealed some disagreement was observed in terms of how much direct chemical coupling between carbon- and nitrogen-containing species affects NO formation.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
C-N interactions, Detailed chemistry, DME, NH3, NO formation, PLIF
in
Fuel
volume
371
article number
131951
publisher
Elsevier
external identifiers
  • scopus:85193900062
ISSN
0016-2361
DOI
10.1016/j.fuel.2024.131951
language
English
LU publication?
yes
id
ddb26bad-e0d3-49d5-bba3-2c4fbd20755d
date added to LUP
2024-06-13 13:59:50
date last changed
2024-06-13 13:59:50
@article{ddb26bad-e0d3-49d5-bba3-2c4fbd20755d,
  abstract     = {{<p>Binary mixture of ammonia (NH<sub>3</sub>) and dimethyl ether (DME) has been considered in literature as a potential fuel for practical use. Nitric oxide (NO) is a major product of combustion of NH<sub>3</sub>-containing fuels, and its formation routes have to be comprehensively studied. In this work, concentration profiles of NO were experimentally measured in laminar axisymmetric flames using planar laser-induced fluorescence. The molar percentage of NH<sub>3</sub> in the NH<sub>3</sub>/DME fuel mixture varied from 10% to 60%. Emission levels of NO have reached as much as around 1% for mixtures with around 50% NH<sub>3</sub>. NO formation was analyzed with numerical simulations of 1D laminar flames and several detailed kinetic mechanisms. Modeling was performed in Chemkin with the steady-state burner-stabilized and free-propagating planar laminar flame reactor models. It was observed that the most recent versions of the contemporary NH<sub>3</sub>/DME models are able to reproduce the experiments, and their predictions agree with each other due to similarities in the NH<sub>3</sub> submechanisms. Kinetic analysis has revealed some disagreement was observed in terms of how much direct chemical coupling between carbon- and nitrogen-containing species affects NO formation.</p>}},
  author       = {{Alekseev, Vladimir A. and Brackmann, Christian and Liu, Xin and Nilsson, Elna J.K.}},
  issn         = {{0016-2361}},
  keywords     = {{C-N interactions; Detailed chemistry; DME; NH3; NO formation; PLIF}},
  language     = {{eng}},
  month        = {{09}},
  publisher    = {{Elsevier}},
  series       = {{Fuel}},
  title        = {{Nitric oxide formation in flames of NH3/DME binary mixtures : Laser-induced fluorescence measurements and detailed kinetic analysis}},
  url          = {{http://dx.doi.org/10.1016/j.fuel.2024.131951}},
  doi          = {{10.1016/j.fuel.2024.131951}},
  volume       = {{371}},
  year         = {{2024}},
}