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dc.contributor.authorSteinmetz, S.A.
dc.contributor.authorAhmed, H.A.
dc.contributor.authorBoyette, Wesley
dc.contributor.authorDunn, M.J.
dc.contributor.authorRoberts, William L.
dc.contributor.authorMasri, A.R.
dc.date.accessioned2021-09-12T12:49:21Z
dc.date.available2021-09-12T12:49:21Z
dc.date.issued2021-09-10
dc.date.submitted2021-07-07
dc.identifier.citationSteinmetz, S. A., Ahmed, H. A., Boyette, W. R., Dunn, M. J., Roberts, W. L., & Masri, A. R. (2022). Effects of ammonia and hydrogen on the sooting characteristics of laminar coflow flames of ethylene and methane. Fuel, 307, 121914. doi:10.1016/j.fuel.2021.121914
dc.identifier.issn0016-2361
dc.identifier.doi10.1016/j.fuel.2021.121914
dc.identifier.urihttp://hdl.handle.net/10754/671150
dc.description.abstractHydrogen and its derivatives, including ammonia, are gaining increasing attention as carbon-neutral fuel alternatives. An intermediate step in the transition to hydrogen and ammonia is the blending of these fuels with hydrocarbons, introducing the challenge of soot formation. The impact of ammonia on soot formation has recently been the focus of several studies, but a complete understanding of its chemical effects is lacking. Hydrogen, by comparison, has received significant attention from the soot community. However, controversy remains with regards to hydrogen’s chemical impact, and the dependence of this impact on fuel and flame configuration. This work investigates the effect of both hydrogen and ammonia on soot formation in laminar coflow flames of both ethylene and methane. Hydrogen or ammonia are introduced either by addition or substitution, with parallel studies of helium and argon, in order to isolate their chemical effects. Time- and spectrally-resolved laser-induced emissions from UV and IR excitation are used to quantify differences in soot and soot precursor formation. Additionally, chemical kinetics calculations and analyses are used to elucidate the effects of ammonia introduction to ethylene flames. Ammonia is found to chemically inhibit soot when mixed with either ethylene or methane, with increasing effects on larger precursors. Calculations suggest that this suppression is due to carbon consumption in the formation of HCN and CN. Hydrogen is found to chemically enhance soot formation in both ethylene and methane flames.
dc.description.sponsorshipThis research was supported by the Australian Research Council and funding from King Abdullah University of Science and Technology (KAUST). Authors thank Prof. He Lin, from Shanghai Jiao Tong University, for providing the used chemical mechanism.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0016236121017919
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Fuel. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Fuel, [307, , (2021-09-10)] DOI: 10.1016/j.fuel.2021.121914 . © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleEffects of ammonia and hydrogen on the sooting characteristics of laminar coflow flames of ethylene and methane
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentMechanical Engineering Program
dc.identifier.journalFuel
dc.rights.embargodate2023-09-10
dc.eprint.versionPost-print
dc.contributor.institutionSchool of Aerospace Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia.
dc.contributor.institutionMechanical Engineering Department, Zagazig University, Zagazig, Sharkia 44519, Egypt.
dc.identifier.volume307
dc.identifier.pages121914
kaust.personBoyette, Wesley
kaust.personRoberts, William L.
dc.date.accepted2021-09-02
refterms.dateFOA2021-09-12T13:10:47Z


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