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dc.contributor.authorWang, Shixing
dc.contributor.authorWang, Zhihua
dc.contributor.authorElbaz, Ayman M.
dc.contributor.authorHan, Xinlu
dc.contributor.authorHe, Yong
dc.contributor.authorCosta, Mário
dc.contributor.authorKonnov, Alexander A.
dc.contributor.authorRoberts, William L.
dc.date.accessioned2020-09-06T10:37:08Z
dc.date.available2020-09-06T10:37:08Z
dc.date.issued2020-08-19
dc.date.submitted2020-04-14
dc.identifier.citationWang, S., Wang, Z., Elbaz, A. M., Han, X., He, Y., Costa, M., … Roberts, W. L. (2020). Experimental study and kinetic analysis of the laminar burning velocity of NH3/syngas/air, NH3/CO/air and NH3/H2/air premixed flames at elevated pressures. Combustion and Flame, 221. doi:10.1016/j.combustflame.2020.08.004
dc.identifier.issn1556-2921
dc.identifier.issn0010-2180
dc.identifier.doi10.1016/j.combustflame.2020.08.004
dc.identifier.urihttp://hdl.handle.net/10754/664942
dc.description.abstractMixing ammonia with syngas can be a promising way to overcome the low reactivity of ammonia, allowing it to find usage in IGCC (Integrated Gasification Combined Cycle) systems and gas turbines for power generation. However, fundamental experimental data on laminar burning velocity of NH3/syngas/air are rather scarce, especially at elevated pressures. This information is critical for the development and validation of reaction mechanisms and advances in combustor design. In the present work, measurements of the laminar burning velocities (SL) of NH3/syngas/air, NH3/CO/air, and NH3/H2/air premixed flames were performed by the heat flux method at pressures up to 5 atm, equivalence ratios ranging from 0.7 to 1.6, ammonia mole fractions in the fuel mixture from 0.2 to 1.0 in the NH3/syngas/air mixtures and 0.03–1.0 in the NH3/CO/air mixtures. Several recently published ammonia oxidation mechanisms were tested against the present experimental data. The measurements and predictions of SL exhibit discrepancies especially for NH3/H2/air flames at elevated pressures. The pressure exponent factors, β, characterizing burning velocity at elevated pressure via empirical power-law correlation SL/SL0 = (P/P0)β are extracted from the measured SL and compared with the numerical results. The thermal, diffusion, and chemical effects of blending syngas with ammonia on SL of the mixtures are distinguished, and the dominant role of the adiabatic flame temperature on the variation of the pressure exponent β is discussed. Kinetic modeling and sensitivity analyses showed that reactions of NHi to N2Hi (i = 0–4) species affect the predicted SL under rich conditions. At elevated pressures, these reactions also affect the NO formation via third-body collision reactions and NHi + NO reactions. Even for rich flames, the ammonia consumption is favored with the addition of syngas which also promotes NO formation by enriching the H and OH radical pools and increasing the flame temperature. The addition of hydrogen or carbon monoxide has equally promoting effect on the ammonia decomposition and NOx formation although their flame speed differs a lot.
dc.description.sponsorshipThis work was supported by the Fundamental Research Funds for the Central Universities (2020FZZX003-01-01) the State Key Laboratory of Clean Energy Utilization (ZJUCEU2019001), and King Abdullah University of Science and Technolgy. M. Costa acknowledges the support from the Fundação para a Ciência e a Tecnologia, through IDMEC, under LAETA, project UID/EMS/50022/2019.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0010218020303199
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, [221, , (2020-08-19)] DOI: 10.1016/j.combustflame.2020.08.004 . © 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.titleExperimental study and kinetic analysis of the laminar burning velocity of NH3/syngas/air, NH3/CO/air and NH3/H2/air premixed flames at elevated pressures
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentdClean Combustion Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
dc.contributor.departmenthigh-pressure combustion (HPC) Research Group
dc.identifier.journalCombustion and Flame
dc.rights.embargodate2022-08-04
dc.eprint.versionPost-print
dc.contributor.institutionaState Key Laboratory of Clean Energy Utilization, Zhejiang University, 310027 Hangzhou, PR China
dc.contributor.institutioncDivision of Combustion Physics, Lund University, Lund S-22100, Sweden
dc.contributor.institutionbIDMEC, Mechanical Engineering Department, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
dc.identifier.volume221
dc.identifier.pages270-287
kaust.personWang, Shixing
kaust.personElbaz, Ayman M.
kaust.personRoberts, William L.
dc.date.accepted2020-08-04
dc.identifier.eid2-s2.0-85089490662
refterms.dateFOA2020-09-06T12:00:43Z
dc.date.published-online2020-08-19
dc.date.published-print2020-11


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