Measurements of NH3 linestrengths and collisional broadening coefficients in N2, O2, CO2, and H2O near 1103.46cm-1

Handle URI:
http://hdl.handle.net/10754/562742
Title:
Measurements of NH3 linestrengths and collisional broadening coefficients in N2, O2, CO2, and H2O near 1103.46cm-1
Authors:
Owen, Kyle; Es-sebbar, Et-touhami; Farooq, Aamir ( 0000-0001-5296-2197 )
Abstract:
Laser-based ammonia gas sensors have useful applications in many fields including combustion, atmospheric monitoring, and medical diagnostics. Calibration-free trace gas sensors require the spectroscopic parameters including linestrengths and collisional broadening coefficients to be known. Ammonia's strong ν2 vibrational band between 9 - 12 μm has the high absorption strength needed for sensing small concentrations. Within this band, the 1103.46cm-1 feature is one of the strongest and has minimal interference from CO2 and H2O. However, the six rotational transitions that make up this feature have not been studied previously with absorption spectroscopy due to their small line spacing ranging from 0.004 to 0.029cm-1. A tunable quantum cascade laser was used to accurately study these six transitions. A retrieval program was used to determine the linestrengths and collisional broadening coefficients based on Voigt and Galatry profiles. The experiments were performed with ammonia mixtures in nitrogen, oxygen, water vapor, and carbon dioxide at room temperature in an optical cell. These data are going to aid in the development of quantitative ammonia sensors utilizing this strong absorption feature. © 2013 Elsevier Ltd.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Chemical Kinetics & Laser Sensors Laboratory
Publisher:
Elsevier
Journal:
Journal of Quantitative Spectroscopy and Radiative Transfer
Issue Date:
May-2013
DOI:
10.1016/j.jqsrt.2013.02.001
Type:
Article
ISSN:
00224073
Sponsors:
We would like to acknowledge the funding provided by King Abdullah University of Science and Technology (KAUST) and Clean Combustion Research Center (CCRC).
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorOwen, Kyleen
dc.contributor.authorEs-sebbar, Et-touhamien
dc.contributor.authorFarooq, Aamiren
dc.date.accessioned2015-08-03T11:04:01Zen
dc.date.available2015-08-03T11:04:01Zen
dc.date.issued2013-05en
dc.identifier.issn00224073en
dc.identifier.doi10.1016/j.jqsrt.2013.02.001en
dc.identifier.urihttp://hdl.handle.net/10754/562742en
dc.description.abstractLaser-based ammonia gas sensors have useful applications in many fields including combustion, atmospheric monitoring, and medical diagnostics. Calibration-free trace gas sensors require the spectroscopic parameters including linestrengths and collisional broadening coefficients to be known. Ammonia's strong ν2 vibrational band between 9 - 12 μm has the high absorption strength needed for sensing small concentrations. Within this band, the 1103.46cm-1 feature is one of the strongest and has minimal interference from CO2 and H2O. However, the six rotational transitions that make up this feature have not been studied previously with absorption spectroscopy due to their small line spacing ranging from 0.004 to 0.029cm-1. A tunable quantum cascade laser was used to accurately study these six transitions. A retrieval program was used to determine the linestrengths and collisional broadening coefficients based on Voigt and Galatry profiles. The experiments were performed with ammonia mixtures in nitrogen, oxygen, water vapor, and carbon dioxide at room temperature in an optical cell. These data are going to aid in the development of quantitative ammonia sensors utilizing this strong absorption feature. © 2013 Elsevier Ltd.en
dc.description.sponsorshipWe would like to acknowledge the funding provided by King Abdullah University of Science and Technology (KAUST) and Clean Combustion Research Center (CCRC).en
dc.publisherElsevieren
dc.subjectAmmoniaen
dc.subjectCollisional broadening coefficienten
dc.subjectGalatryen
dc.subjectLinestrengthen
dc.subjectVoigten
dc.titleMeasurements of NH3 linestrengths and collisional broadening coefficients in N2, O2, CO2, and H2O near 1103.46cm-1en
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentChemical Kinetics & Laser Sensors Laboratoryen
dc.identifier.journalJournal of Quantitative Spectroscopy and Radiative Transferen
kaust.authorOwen, Kyleen
kaust.authorEs-sebbar, Et-touhamien
kaust.authorFarooq, Aamiren
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