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Title: High temperature infrared absorption cross sections of methane near 3.4 µm in Ar and CO 2 mixtures

Abstract

In this study, the absorption cross-sections of CH 4 at two wavelengths in the mid-IR region: λ peak = 3403.4 nm and λ valley = 3403.7 nm were measured. Data were taken using three different compositions of non-reactive gas mixtures comprising CH 4/Ar/CO 2 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, CO 2, and N 2). 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 CO 2, O 2, and Ar. Lastly, current measurements will be valuable addition to the spectroscopy database for methane- an important fuel used for power generation and heating around the world.

Authors:
 [1];  [2];  [2];  [3];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences; Univ. of Central Florida, Orlando, FL (United States). Mechanical and Aerospace Engineering, Center for Advanced Turbomachinery and Energy Research (CATER)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences
  3. Univ. of Central Florida, Orlando, FL (United States). Department of Physics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1426096
Report Number(s):
LLNL-JRNL-733790
Journal ID: ISSN 0022-4073
Grant/Contract Number:
AC52-07NA27344; FE0025260
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Quantitative Spectroscopy and Radiative Transfer
Additional Journal Information:
Journal Volume: 206; Journal Issue: C; Journal ID: ISSN 0022-4073
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY

Citation Formats

Koroglu, Batikan, Neupane, Sneha, Pryor, Owen, Peale, Robert E., and Vasu, Subith S. High temperature infrared absorption cross sections of methane near 3.4 µm in Ar and CO2 mixtures. United States: N. p., 2017. Web. doi:10.1016/j.jqsrt.2017.11.003.
Koroglu, Batikan, Neupane, Sneha, Pryor, Owen, Peale, Robert E., & Vasu, Subith S. High temperature infrared absorption cross sections of methane near 3.4 µm in Ar and CO2 mixtures. United States. doi:10.1016/j.jqsrt.2017.11.003.
Koroglu, Batikan, Neupane, Sneha, Pryor, Owen, Peale, Robert E., and Vasu, Subith S. Sat . "High temperature infrared absorption cross sections of methane near 3.4 µm in Ar and CO2 mixtures". United States. doi:10.1016/j.jqsrt.2017.11.003.
@article{osti_1426096,
title = {High temperature infrared absorption cross sections of methane near 3.4 µm in Ar and CO2 mixtures},
author = {Koroglu, Batikan and Neupane, Sneha and Pryor, Owen and Peale, Robert E. and Vasu, Subith S.},
abstractNote = {In this study, 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. Lastly, current measurements will be valuable addition to the spectroscopy database for methane- an important fuel used for power generation and heating around the world.},
doi = {10.1016/j.jqsrt.2017.11.003},
journal = {Journal of Quantitative Spectroscopy and Radiative Transfer},
number = C,
volume = 206,
place = {United States},
year = {Sat Nov 04 00:00:00 EDT 2017},
month = {Sat Nov 04 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 4, 2018
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