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Lookup NU author(s): Dr Andrew AspdenORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
To promote the understanding and development of the steam diluted H 2 /air combustiontechnology, the chemical effect of steam dilution on NO formation in 1D laminar premixedH 2 /air flame is numerically studied over a wide range of conditions. The importance and theinfluence path of the chemical effect of steam dilution are analyzed, and the impact ofworking conditions is explored. This research makes up for the deficiencies in understandingthe chemical effect of steam dilution, and has significant reference value for optimizingworking conditions in practical application. Results show that the importance of steamdilution’s chemical effect on NO formation highly depends on the dilution rate and pressure.In this study, the chemical effect of steam accounts for -16.3% to 20.1% of the total NOreduced by steam dilution. The direct chemical effect of steam is the main cause of NOchange. It reduces the H and O concentration by inhibiting the reaction OH+H 2 <=> H+H 2 Oand H+O 2 <=> OH+O. However, the third-body effect of steam increases the O concentrationand then slightly promotes NO formation. Increasing pressure causes the direct chemicaleffect to gradually turns to promote the NO generation at low dilution rates.29 Keywords: H 2 flame, Steam dilution, Chemical effect, NO formation
Author(s): Lyu Y, Aspden AJ, Zhang L, Liu L, Qiu P
Publication type: Article
Publication status: Published
Journal: International Journal of Hydrogen Energy
Year: 2021
Volume: 46
Issue: 24
Pages: 13402-13412
Print publication date: 06/04/2021
Online publication date: 18/02/2021
Acceptance date: 21/01/2021
Date deposited: 28/02/2021
ISSN (print): 0360-3199
ISSN (electronic): 1879-3487
Publisher: Elsevier
URL: https://doi.org/10.1016/j.ijhydene.2021.01.133
DOI: 10.1016/j.ijhydene.2021.01.133
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