Data consistency of the laminar burning velocity of oxygen-enriched NH3 + O2 + N2 mixtures and kinetic modeling
(2025) In Fuel 385.- Abstract
In this study, laminar burning velocities (LBV) of ammonia in oxygen-enriched air (oxygen content ranging from 30 to 50 vol%) were investigated under various initial temperatures (298, 323, and 348 K) at a pressure of 1 atm, employing the heat flux method. Our measurements reveal substantial disparities with previously published data primarily obtained using the spherical flame method. The reliability of our results was substantiated by the utilization of two entirely independent experimental setups, and good repeatability was also demonstrated by revisiting experiments over an extended period. Present investigations prompted a re-evaluation of the behavior of detailed kinetic models from the literature, namely, the model from Shrestha... (More)
In this study, laminar burning velocities (LBV) of ammonia in oxygen-enriched air (oxygen content ranging from 30 to 50 vol%) were investigated under various initial temperatures (298, 323, and 348 K) at a pressure of 1 atm, employing the heat flux method. Our measurements reveal substantial disparities with previously published data primarily obtained using the spherical flame method. The reliability of our results was substantiated by the utilization of two entirely independent experimental setups, and good repeatability was also demonstrated by revisiting experiments over an extended period. Present investigations prompted a re-evaluation of the behavior of detailed kinetic models from the literature, namely, the model from Shrestha et al. (Proc. Combust. Inst. 38 (2021) 2163–2174), Mei et al. (Combust. Flame 210 (2019) 236–246), and Zhu et al. (Combust. Flame 260 (2024) 113239). The performance of the former two models contradicts the findings of the authors based on their own LBV data. The third model, although validated over NH3 + H2 experiments, fails to predict the present LBV accurately. With the help of sensitivity analysis and the most recent theoretical studies, the model from Chen et al. (Comb. Flame 255 (2023) 112930), the latest version from our research group, was modified by revisiting the rate constants of several important reactions, and the updated model performs well in predicting LBV of the present flames, NH3 + H2, NH3 + O2 + Ar, and high-temperature NH3 + air flames, it also gives accurate predictions of high-temperature ignition delay time data and speciation profiles from the literature.
(Less)
- author
- Chen, Jundie LU ; Han, Xinlu LU and Konnov, Alexander A. LU
- organization
- publishing date
- 2025-04
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Ammonia, Data consistency, Detailed kinetic model, Heat flux method, Laminar burning velocity
- in
- Fuel
- volume
- 385
- article number
- 134017
- publisher
- Elsevier
- external identifiers
-
- scopus:85211999983
- ISSN
- 0016-2361
- DOI
- 10.1016/j.fuel.2024.134017
- language
- English
- LU publication?
- yes
- id
- 06dd62c6-37dd-4e02-960a-963d3fb4f52d
- date added to LUP
- 2025-02-26 15:41:00
- date last changed
- 2025-04-23 20:13:59
@article{06dd62c6-37dd-4e02-960a-963d3fb4f52d,
abstract = {{<p>In this study, laminar burning velocities (LBV) of ammonia in oxygen-enriched air (oxygen content ranging from 30 to 50 vol%) were investigated under various initial temperatures (298, 323, and 348 K) at a pressure of 1 atm, employing the heat flux method. Our measurements reveal substantial disparities with previously published data primarily obtained using the spherical flame method. The reliability of our results was substantiated by the utilization of two entirely independent experimental setups, and good repeatability was also demonstrated by revisiting experiments over an extended period. Present investigations prompted a re-evaluation of the behavior of detailed kinetic models from the literature, namely, the model from Shrestha et al. (Proc. Combust. Inst. 38 (2021) 2163–2174), Mei et al. (Combust. Flame 210 (2019) 236–246), and Zhu et al. (Combust. Flame 260 (2024) 113239). The performance of the former two models contradicts the findings of the authors based on their own LBV data. The third model, although validated over NH<sub>3</sub> + H<sub>2</sub> experiments, fails to predict the present LBV accurately. With the help of sensitivity analysis and the most recent theoretical studies, the model from Chen et al. (Comb. Flame 255 (2023) 112930), the latest version from our research group, was modified by revisiting the rate constants of several important reactions, and the updated model performs well in predicting LBV of the present flames, NH<sub>3</sub> + H<sub>2</sub>, NH<sub>3</sub> + O<sub>2</sub> + Ar, and high-temperature NH<sub>3</sub> + air flames, it also gives accurate predictions of high-temperature ignition delay time data and speciation profiles from the literature.</p>}},
author = {{Chen, Jundie and Han, Xinlu and Konnov, Alexander A.}},
issn = {{0016-2361}},
keywords = {{Ammonia; Data consistency; Detailed kinetic model; Heat flux method; Laminar burning velocity}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Fuel}},
title = {{Data consistency of the laminar burning velocity of oxygen-enriched NH<sub>3</sub> + O<sub>2</sub> + N<sub>2</sub> mixtures and kinetic modeling}},
url = {{http://dx.doi.org/10.1016/j.fuel.2024.134017}},
doi = {{10.1016/j.fuel.2024.134017}},
volume = {{385}},
year = {{2025}},
}