Show simple item record

dc.contributor.authorAlquaity, Awad
dc.contributor.authorChen, Bingjie
dc.contributor.authorHan, Jie
dc.contributor.authorSelim, Hatem
dc.contributor.authorBelhi, Memdouh
dc.contributor.authorKarakaya, Yasin
dc.contributor.authorKasper, Tina
dc.contributor.authorSarathy, Mani
dc.contributor.authorBisetti, Fabrizio
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2018-02-01T12:01:30Z
dc.date.available2018-02-01T12:01:30Z
dc.date.issued2016-06-15
dc.identifier.citationAlquaity ABS, Chen B, Han J, Selim H, Belhi M, et al. (2017) New insights into methane-oxygen ion chemistry. Proceedings of the Combustion Institute 36: 1213–1221. Available: http://dx.doi.org/10.1016/j.proci.2016.05.053.
dc.identifier.issn1540-7489
dc.identifier.doi10.1016/j.proci.2016.05.053
dc.identifier.urihttp://hdl.handle.net/10754/627028
dc.description.abstractExternal electric fields may reduce emissions and improve combustion efficiency by active control of combustion processes. In-depth, quantitative understanding of ion chemistry in flames enables predictive models to describe the effect of external electric fields on combustion plasma. This study presents detailed cation profile measurements in low-pressure, burner-stabilized, methane/oxygen/argon flames. A quadrupole molecular beam mass spectrometer (MBMS) coupled to a low-pressure (P =30Torr) combustion chamber was utilized to measure ion signals as a function of height above the burner. Lean, stoichiometric and rich flames were examined to evaluate the dependence of ion chemistry on flame stoichiometry. Additionally, for the first time, cataloging of flame cations is performed using a high mass resolution time-of-flight mass spectrometer (TOF-MS) to distinguish ions with the same nominal mass. In the lean and stoichiometric flames, the dominant ions were HO, CHO , CHO, CHO and CHO, whereas large signals were measured for HO, CH and CHO in the rich flame. The spatial distribution of cations was compared with results from numerical simulations constrained by thermocouple-measured flame temperatures. Across all flames, the predicted HO decay rate was noticeably faster than observed experimentally. Sensitivity analysis showed that the mole fraction of HO is most sensitive to the rate of chemi-ionization CH+O↔CHO +E. To our knowledge, this work represents the first detailed measurements of positive ions in canonical low-pressure methane flames.
dc.description.sponsorshipThis work was supported by an Academic Excellence Alliance (AEA) grant, titled Electromagnetically-Enhanced Combustion, awarded by the Office of Sponsored Research at King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.subjectCations
dc.subjectElectric fields
dc.subjectIon chemistry
dc.subjectLow-pressure flame
dc.subjectMBMS
dc.titleNew insights into methane-oxygen ion chemistry
dc.typeArticle
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratory
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentCombustion and Pyrolysis Chemistry (CPC) Group
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentReactive Flow Modeling Laboratory (RFML)
dc.identifier.journalProceedings of the Combustion Institute
dc.contributor.institutionMass Spectrometry in Reactive Flows - Thermodynamics (IVG), University of Duisburg-Essen, Duisburg, Germany
kaust.personAlquaity, Awad
kaust.personChen, Bingjie
kaust.personHan, Jie
kaust.personSelim, Hatem
kaust.personBelhi, Memdouh
kaust.personSarathy, Mani
kaust.personBisetti, Fabrizio
kaust.personFarooq, Aamir
kaust.acknowledged.supportUnitOffice of Sponsored Research
dc.date.published-online2016-06-15
dc.date.published-print2017


This item appears in the following Collection(s)

Show simple item record