High Temperature Infrared Absorption Cross Sections Of Methane Near 3.4 µm In Ar And Co2 Mixtures

Abstract

The absorption cross-sections of CH4 at two wavelengths in the mid-IR region: λpeak = 3403.4 nm and λvalley = 3403.7 nm were measured. Data were taken using three different compositions of non-reactive gas mixtures comprising CH4/Ar/CO2 between 700 < T < 2000 K and 0.1 < P < 1.5 atm in a shock tube utilizing a continuous-wave distributed-feedback quantum cascade laser. Also, broadband room temperature methane cross section measurements were performed using a Fourier transform infrared spectrometer and the cascade laser to gain a better insight into the changes of the line shapes in various bath gasses (Ar, CO2, and N2). An application of the high-temperature cross-section data was demonstrated to determine the concentration of methane during oxy-methane combustion in a mixture of CO2, O2, and Ar. Current measurements will be valuable addition to the spectroscopy database for methane- an important fuel used for power generation and heating around the world.

Publication Date

2-1-2018

Publication Title

Journal of Quantitative Spectroscopy and Radiative Transfer

Volume

206

Number of Pages

36-45

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jqsrt.2017.11.003

Socpus ID

85033580616 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85033580616

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