Mid-infrared absorption measurements of liquid hydrocarbon fuels near 3.4 μm

Keywords

Absorption spectra, Hydrocarbon fuels, Mid-infrared laser-absorption diagnostics, Fourier transform infrared (FTIR), Liquid-phase measurements

Abstract

Quantitative absorption spectra for several hydrocarbon fuels in the liquid phase at 27o C are presented. Measurements of toluene, n-dodecane, n-decane, and three samples of gasoline were made over the spectral region 2700-3200 cm -1 to support the development of mid-infrared laser-absorption dianostics for measurements of fuel vapor in the presence of liquid films and aerosols. A procedure for quantitative Fourier transform infrared (FTIR) absorption measurements of strongly absorbing liquids is described and the resulting absorption spectra are compared with previously measured absorption spectra in the vapor phase. The measured absorption spectra for liquid gasoline are shown to scale with the volume percent of olefin, alkane, and aromatic hydrocarbons in each sample. Finally, the observed frequency shift of ≅ 8 cm-1 in the spectra of vapor and liquid hydrocarbons is discussed, including the potential for measurements of fuel vapor in the presence of liquid films.

Original Publication Citation

Jason M. Porter, Jay B. Jeffries, Ronald K. Hanson, Mid-infrared absorption measurements of liquid hydrocarbon fuels near 3.4 μm, Journal of Quantitative Spectroscopy & Radiative Transfer 110 (2009) 2135-2147.

Document Type

Peer-Reviewed Article

Publication Date

2009

Publisher

Elsevier

Language

English

College

Ira A. Fulton College of Engineering and Technology

Department

Mechanical Engineering

University Standing at Time of Publication

Associate Professor

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