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dc.contributor.authorBennett, Anthony
dc.contributor.authorLiu, Peng
dc.contributor.authorLi, Zepeng
dc.contributor.authorKharbatia, Najeh M.
dc.contributor.authorBoyette, Wesley
dc.contributor.authorMasri, Assaad R.
dc.contributor.authorRoberts, William L.
dc.date.accessioned2020-07-21T10:48:43Z
dc.date.available2020-07-21T10:48:43Z
dc.date.issued2020-07-12
dc.date.submitted2020-03-09
dc.identifier.citationBennett, A. M., Liu, P., Li, Z., Kharbatia, N. M., Boyette, W., Masri, A. R., & Roberts, W. L. (2020). Soot formation in laminar flames of ethylene/ammonia. Combustion and Flame, 220, 210–218. doi:10.1016/j.combustflame.2020.06.042
dc.identifier.issn1556-2921
dc.identifier.issn0010-2180
dc.identifier.doi10.1016/j.combustflame.2020.06.042
dc.identifier.urihttp://hdl.handle.net/10754/664326
dc.description.abstractCo-firing NH3 with other fuels is receiving growing interest as a feasible solution to improve its combustion and emission properties. Previous studies mainly focused on NOx emission, and paid less attention to soot formation which is investigated here using a laminar counterflow flame configuration with ethylene fuel (75% by mole) mixed with different proportions of ammonia (between 0 and 25% by mole while the remainder is nitrogen). Soot volume fraction (SVF) was measured using planar laser induced incandescence (PLII). It was found that the addition of ammonia significantly reduced the measured SVF by 4–6% per 1% ammonia addition as compared to the reference flame (25% nitrogen). To rule out temperature effects, the experiments were simulated using Chemkin Pro and it was found that there were negligible differences in temperature between each condition implying that temperature was not responsible for the reduction in SVF. To investigate the chemical effects of ammonia addition, polycyclic aromatic hydrocarbons (PAH) were measured using planar laser induced fluorescence (PLIF) at 4 wavelengths (350 nm, 400 nm, 450 nm, and 500 nm). PLIF intensities at 350 nm is deemed to correlate with PAHs of 2–3 rings and measured profiles at this wavelength were nearly overlapping for all cases. These findings were supported by GC–MS measurements of acetylene and benzene with the latter showing little change in the peak for the cases studied here. At longer wavelengths, PLIF intensities began to show the same trends found for SVF measurements. Additionally, a specific nitrogen detector was used during GC–MS measurements and several nitrogen containing hydrocarbon species were detected with the 25% addition of ammonia. The combined results indicate that the nitrogen containing hydrocarbon species are likely to account for soot reduction, with the precise mechanism yet to be elucidated.
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST), under award number BAS/1/1370-01-01.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0010218020302601
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Combustion and Flame. 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 Combustion and Flame, [220, , (2020-07-12)] DOI: 10.1016/j.combustflame.2020.06.042 . © 2020. 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.titleSoot formation in laminar flames of ethylene/ammonia
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentOrganics
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmenthigh-pressure combustion (HPC) Research Group
dc.identifier.journalCombustion and Flame
dc.rights.embargodate2022-06-29
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Mechanical and Aerospace Engineering, The Ohio State University, 201 West 19th Avenue, Columbus, OH 43210, USA
dc.contributor.institutionSchool of Aerospace Mechanical and Mechatronic Engineering, University of Sydney, NSW 2006, Australia
dc.identifier.volume220
dc.identifier.pages210-218
kaust.personBennett, Anthony M.
kaust.personLiu, Peng
kaust.personLi, Zepeng
kaust.personKharbatia, Najeh M.
kaust.personRoberts, William L.
kaust.grant.numberBAS/1/1370-01-01
dc.date.accepted2020-06-29
dc.identifier.eid2-s2.0-85087630590
refterms.dateFOA2020-07-22T06:11:23Z
dc.date.published-online2020-07-12
dc.date.published-print2020-10


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