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dc.contributor.authorShakfa, Mohammad Khaled
dc.contributor.authorMhanna, Mhanna
dc.contributor.authorJin, Hanfeng
dc.contributor.authorLiu, Dapeng
dc.contributor.authorDjebbi, Khalil
dc.contributor.authorMarangoni, Marco
dc.contributor.authorFarooq, Aamir
dc.date.accessioned2020-10-01T06:21:53Z
dc.date.available2020-10-01T06:21:53Z
dc.date.issued2020-09-16
dc.date.submitted2019-11-08
dc.identifier.citationShakfa, M. K., Mhanna, M., Jin, H., Liu, D., Djebbi, K., Marangoni, M., & Farooq, A. (2020). A mid-infrared diagnostic for benzene using a tunable difference-frequency-generation laser. Proceedings of the Combustion Institute. doi:10.1016/j.proci.2020.06.382
dc.identifier.issn1540-7489
dc.identifier.doi10.1016/j.proci.2020.06.382
dc.identifier.urihttp://hdl.handle.net/10754/665391
dc.description.abstractBenzene is a very important molecule in a variety of industrial, environmental, and chemical systems. In combustion, benzene plays an essential role in the formation and growth of polycyclic aromatic hydrocarbons and soot. In this work, a new laser-based diagnostic is presented to make quantitative, interference-free, and sensitive measurements of benzene in the mid-infrared (MIR) region. The diagnostic is based on a widely tunable difference-frequency-generation (DFG) laser system. We developed this laser source to emit in the MIR between 666.54 cm-1 and 790.76 cm-1 as a result of the DFG process between an external-cavity quantum-cascade-laser and a CO2 gas laser in a nonlinear, orientation-patterned GaAs crystal. Benzene measurements were carried out at the peak (673.94 cm-1) of the Q-branch of the v11 vibrational band of benzene. The absorption cross-section of benzene was measured over a range of pressures (4.44 mbar to 1.158 bar) at room temperature. The temperature dependence of the absorption cross-section was studied behind reflected shock waves over 553-1473 K. The diagnostic was demonstrated in a high-temperature reactive experiment of benzene formation from propargyl radicals. The new diagnostic will prove highly beneficial for high-temperature studies of benzene formation and consumption kinetics.
dc.description.sponsorshipResearch reported in this publication was funded by the Office of Sponsored Research and King Abdullah University of Science and Technology (KAUST).
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S1540748920305095
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Proceedings of the Combustion Institute. 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 Proceedings of the Combustion Institute, [, , (2020-09-16)] DOI: 10.1016/j.proci.2020.06.382 . © 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.titleA mid-infrared diagnostic for benzene using a tunable difference-frequency-generation laser
dc.typeArticle
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratory
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentMechanical Engineering
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalProceedings of the Combustion Institute
dc.rights.embargodate2022-09-16
dc.eprint.versionPost-print
dc.contributor.institutionDipartimento di Fisica, Politecnico di Milano and IFN-CNR, Via Gaetano Previati 1/C, 23900 Lecco, Italy
kaust.personShakfa, Mohammad Khaled
kaust.personMhanna, Mhanna
kaust.personJin, Hanfeng
kaust.personLiu, Dapeng
kaust.personDjebbi, Khalil
kaust.personFarooq, Aamir
dc.date.accepted2020-06-28
dc.identifier.eid2-s2.0-85091444563
refterms.dateFOA2020-10-01T06:41:16Z
kaust.acknowledged.supportUnitOffice of Sponsored Research
dc.date.published-online2020-09-16
dc.date.published-print2020-09


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