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dc.contributor.authorChrystie, Robin
dc.contributor.authorNasir, Ehson Fawad
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2015-08-12T09:30:17Z
dc.date.available2015-08-12T09:30:17Z
dc.date.issued2015-05-29
dc.identifier.citationChrystie, R. S. M., Nasir, E. F., & Farooq, A. (2015). Propene concentration sensing for combustion gases using quantum-cascade laser absorption near 11 μm. Applied Physics B, 120(2), 317–327. doi:10.1007/s00340-015-6139-4
dc.identifier.issn09462171
dc.identifier.doi10.1007/s00340-015-6139-4
dc.identifier.urihttp://hdl.handle.net/10754/566153
dc.description.abstractWe report on a strategy to measure, in situ, the concentration of propene (C3H6) in combustion gases using laser absorption spectroscopy. Pyrolysis of n-butane was conducted in a shock tube, in which the resultant gases were probed using an extended cavity quantum-cascade laser. A differential absorption approach using online and offline wavelengths near λ = 10.9 μm enabled discrimination of propene, cancelling the effects of spectral interference from the simultaneous presence of intermediate hydrocarbon species during combustion. Such interference-free measurements were facilitated by exploiting the =C–H bending mode characteristic to alkenes (olefins). It was confirmed, for intermediate species present during pyrolysis of n-butane, that their absorption cross sections were the same magnitude for both online and offline wavelengths. Hence, this allowed time profiles of propene concentration to be measured during pyrolysis of n-butane in a shock tube. Time profiles of propene subsequent to a passing shock wave exhibit trends similar to that predicted by the well-established JetSurF 1.0 chemical kinetic mechanism, albeit lower by a factor of two. Such a laser diagnostic is a first step to experimentally determining propene in real time with sufficient time resolution, thus aiding the refinement and development of chemical kinetic models for combustion. © 2015 Springer-Verlag Berlin Heidelberg
dc.publisherSpringer Nature
dc.titlePropene concentration sensing for combustion gases using quantum-cascade laser absorption near 11 μm
dc.typeArticle
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratory
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalApplied Physics B
kaust.personChrystie, Robin
kaust.personNasir, Ehson Fawad
kaust.personFarooq, Aamir
dc.date.published-online2015-05-29
dc.date.published-print2015-08


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