Measurements of Positively Charged Ions in Premixed Methane-Oxygen Atmospheric Flames

Handle URI:
http://hdl.handle.net/10754/623149
Title:
Measurements of Positively Charged Ions in Premixed Methane-Oxygen Atmospheric Flames
Authors:
Alquaity, Awad ( 0000-0002-9306-0154 ) ; Han, Jie ( 0000-0002-6176-8684 ) ; Chahine, May; Selim, Hatem; Belhi, Memdouh ( 0000-0003-4307-4950 ) ; Sarathy, Mani ( 0000-0002-3975-6206 ) ; Bisetti, Fabrizio ( 0000-0001-5162-7805 ) ; Farooq, Aamir ( 0000-0001-5296-2197 )
Abstract:
Cations and anions are formed as a result of chemi-ionization processes in combustion systems. Electric fields can be applied to reduce emissions and improve combustion efficiency by active control of the combustion process. Detailed flame ion chemistry models are needed to understand and predict the effect of external electric fields on combustion plasmas. In this work, a molecular beam mass spectrometer (MBMS) is utilized to measure ion concentration profiles in premixed methane–oxygen argon burner-stabilized atmospheric flames. Lean and stoichiometric flames are considered to assess the dependence of ion chemistry on flame stoichiometry. Relative ion concentration profiles are compared with numerical simulations using various temperature profiles, and good qualitative agreement was observed for the stoichiometric flame. However, for the lean flame, numerical simulations misrepresent the spatial distribution of selected ions greatly. Three modifications are suggested to enhance the ion mechanism and improve the agreement between experiments and simulations. The first two modifications comprise the addition of anion detachment reactions to increase anion recombination at low temperatures. The third modification involves restoring a detachment reaction to its original irreversible form. To our knowledge, this work presents the first detailed measurements of cations and flame temperature in canonical methane–oxygen-argon atmospheric flat flames. The positive ion profiles reported here may be useful to validate and improve ion chemistry models for methane-oxygen flames.
KAUST Department:
Clean Combustion Research Center
Citation:
Alquaity ABS, Han J, Chahine M, Selim H, Belhi M, et al. (2016) Measurements of Positively Charged Ions in Premixed Methane-Oxygen Atmospheric Flames. Combustion Science and Technology 189: 575–594. Available: http://dx.doi.org/10.1080/00102202.2016.1226821.
Publisher:
Informa UK Limited
Journal:
Combustion Science and Technology
Issue Date:
22-Aug-2016
DOI:
10.1080/00102202.2016.1226821
Type:
Article
ISSN:
0010-2202; 1563-521X
Sponsors:
This work was supported by an Academic Excellence Alliance (AEA) grant awarded by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research under the title Electromagnetically-Enhanced Combustion.
Is Supplemented By:
Alquaity, A. B. S., Han, J., Chahine, M., Selim, H., Memdouh Belhi, S. Mani Sarathy, … Farooq, A. (2017). Measurements of Positively Charged Ions in Premixed Methane-Oxygen Atmospheric Flames. Figshare. https://doi.org/10.6084/m9.figshare.3749832; DOI:10.6084/m9.figshare.3749832; HANDLE:http://hdl.handle.net/10754/624777
Additional Links:
http://www.tandfonline.com/doi/full/10.1080/00102202.2016.1226821
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorAlquaity, Awaden
dc.contributor.authorHan, Jieen
dc.contributor.authorChahine, Mayen
dc.contributor.authorSelim, Hatemen
dc.contributor.authorBelhi, Memdouhen
dc.contributor.authorSarathy, Manien
dc.contributor.authorBisetti, Fabrizioen
dc.contributor.authorFarooq, Aamiren
dc.date.accessioned2017-04-13T11:50:57Z-
dc.date.available2017-04-13T11:50:57Z-
dc.date.issued2016-08-22en
dc.identifier.citationAlquaity ABS, Han J, Chahine M, Selim H, Belhi M, et al. (2016) Measurements of Positively Charged Ions in Premixed Methane-Oxygen Atmospheric Flames. Combustion Science and Technology 189: 575–594. Available: http://dx.doi.org/10.1080/00102202.2016.1226821.en
dc.identifier.issn0010-2202en
dc.identifier.issn1563-521Xen
dc.identifier.doi10.1080/00102202.2016.1226821en
dc.identifier.urihttp://hdl.handle.net/10754/623149-
dc.description.abstractCations and anions are formed as a result of chemi-ionization processes in combustion systems. Electric fields can be applied to reduce emissions and improve combustion efficiency by active control of the combustion process. Detailed flame ion chemistry models are needed to understand and predict the effect of external electric fields on combustion plasmas. In this work, a molecular beam mass spectrometer (MBMS) is utilized to measure ion concentration profiles in premixed methane–oxygen argon burner-stabilized atmospheric flames. Lean and stoichiometric flames are considered to assess the dependence of ion chemistry on flame stoichiometry. Relative ion concentration profiles are compared with numerical simulations using various temperature profiles, and good qualitative agreement was observed for the stoichiometric flame. However, for the lean flame, numerical simulations misrepresent the spatial distribution of selected ions greatly. Three modifications are suggested to enhance the ion mechanism and improve the agreement between experiments and simulations. The first two modifications comprise the addition of anion detachment reactions to increase anion recombination at low temperatures. The third modification involves restoring a detachment reaction to its original irreversible form. To our knowledge, this work presents the first detailed measurements of cations and flame temperature in canonical methane–oxygen-argon atmospheric flat flames. The positive ion profiles reported here may be useful to validate and improve ion chemistry models for methane-oxygen flames.en
dc.description.sponsorshipThis work was supported by an Academic Excellence Alliance (AEA) grant awarded by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research under the title Electromagnetically-Enhanced Combustion.en
dc.publisherInforma UK Limiteden
dc.relation.urlhttp://www.tandfonline.com/doi/full/10.1080/00102202.2016.1226821en
dc.subjectAnionsen
dc.subjectCationsen
dc.subjectIon chemistry modelen
dc.subjectMolecular beam mass spectrometry (MBMS)en
dc.subjectMethane flamesen
dc.titleMeasurements of Positively Charged Ions in Premixed Methane-Oxygen Atmospheric Flamesen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalCombustion Science and Technologyen
kaust.authorAlquaity, Awaden
kaust.authorHan, Jieen
kaust.authorChahine, Mayen
kaust.authorSelim, Hatemen
kaust.authorBelhi, Memdouhen
kaust.authorSarathy, Manien
kaust.authorBisetti, Fabrizioen
kaust.authorFarooq, Aamiren
dc.relation.isSupplementedByAlquaity, A. B. S., Han, J., Chahine, M., Selim, H., Memdouh Belhi, S. Mani Sarathy, … Farooq, A. (2017). Measurements of Positively Charged Ions in Premixed Methane-Oxygen Atmospheric Flames. Figshare. https://doi.org/10.6084/m9.figshare.3749832en
dc.relation.isSupplementedByDOI:10.6084/m9.figshare.3749832en
dc.relation.isSupplementedByHANDLE:http://hdl.handle.net/10754/624777en
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