Minute concentration measurements of simple hydrocarbon species using supercontinuum laser absorption spectroscopy

Jihyung Yoo, Nicholas Traina, Michael Halloran, Tonghun Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Minute concentration measurements of simple hydrocarbon gases are demonstrated using near-infrared supercontinuum laser absorption spectroscopy. Absorption-based gas sensors, particularly when combined with optical fiber components, can significantly enhance diagnostic capabilities to unprecedented levels. However, these diagnostic techniques are subject to limitations under certain gas sensing applications where interference and harsh conditions dominate. Supercontinuum laser absorption spectroscopy is a novel laser-based diagnostic technique that can exceed the above-mentioned limitations and provide accurate and quantitative concentration measurement of simple hydrocarbon species while maintaining compatibility with telecommunications-grade optical fiber components. Supercontinuum radiation generated using a highly nonlinear photonic crystal fiber is used to probe rovibrational absorption bands of four hydrocarbon species using full-spectral absorption diagnostics. Absorption spectra of methane (CH4), acetylene (C2H2), and ethylene (C2H4) were measured in the near-infrared spectrum at various pressures and concentrations to determine the accuracy and feasibility of the diagnostic strategy. Absorption spectra of propane (C3H8) were subsequently probed between 1650 nm and 1700 nm, to demonstrate the applicability of the strategy. Measurements agreed very well with simulated spectra generated using the HITRAN database as well as with previous experimental results. Absorption spectra of CH4, C2H2, and C2H4 were then analyzed to determine their respective measurement accuracy and detection limit. Concentration measurements integrated from experimental results were in very good agreement with independent concentration measurements. Calculated detection limits of CH4, C2H2, and C2H4 at room temperature and atmospheric pressure are 0.1%, 0.09%, and 0.17%, respectively.

Original languageEnglish
Pages (from-to)1063-1071
Number of pages9
JournalApplied Spectroscopy
Volume70
Issue number6
DOIs
StatePublished - 2016 Jun 1

Fingerprint

Laser spectroscopy
Hydrocarbons
laser spectroscopy
Absorption spectroscopy
absorption spectroscopy
hydrocarbons
Absorption spectra
absorption spectra
Optical fibers
optical fibers
Gases
gases
Infrared radiation
Acetylene
Propane
Photonic crystal fibers
Methane
Chemical sensors
propane
acetylene

Keywords

  • Supercontinuum
  • absorption spectroscopy
  • hydrocarbons
  • low-temperature combustion

Cite this

Yoo, Jihyung ; Traina, Nicholas ; Halloran, Michael ; Lee, Tonghun. / Minute concentration measurements of simple hydrocarbon species using supercontinuum laser absorption spectroscopy. In: Applied Spectroscopy. 2016 ; Vol. 70, No. 6. pp. 1063-1071.
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Minute concentration measurements of simple hydrocarbon species using supercontinuum laser absorption spectroscopy. / Yoo, Jihyung; Traina, Nicholas; Halloran, Michael; Lee, Tonghun.

In: Applied Spectroscopy, Vol. 70, No. 6, 01.06.2016, p. 1063-1071.

Research output: Contribution to journalArticle

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