Propene concentration sensing for combustion gases using quantum-cascade laser absorption near 11 μm

Handle URI:
http://hdl.handle.net/10754/566153
Title:
Propene concentration sensing for combustion gases using quantum-cascade laser absorption near 11 μm
Authors:
Chrystie, Robin ( 0000-0002-4012-3211 ) ; Nasir, Ehson Fawad ( 0000-0003-1822-737X ) ; Farooq, Aamir ( 0000-0001-5296-2197 )
Abstract:
We 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
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division
Publisher:
Springer Science + Business Media
Journal:
Applied Physics B
Issue Date:
29-May-2015
DOI:
10.1007/s00340-015-6139-4
Type:
Article
ISSN:
09462171
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorChrystie, Robinen
dc.contributor.authorNasir, Ehson Fawaden
dc.contributor.authorFarooq, Aamiren
dc.date.accessioned2015-08-12T09:30:17Zen
dc.date.available2015-08-12T09:30:17Zen
dc.date.issued2015-05-29en
dc.identifier.issn09462171en
dc.identifier.doi10.1007/s00340-015-6139-4en
dc.identifier.urihttp://hdl.handle.net/10754/566153en
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 Heidelbergen
dc.publisherSpringer Science + Business Mediaen
dc.titlePropene concentration sensing for combustion gases using quantum-cascade laser absorption near 11 μmen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalApplied Physics Ben
kaust.authorChrystie, Robinen
kaust.authorNasir, Ehson Fawaden
kaust.authorFarooq, Aamiren
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