Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7846539 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2017 | 5 Pages |
Abstract
To the best of our knowledge, we present first-time measurements of the absorption cross sections of 13C ethane and propane isotopologues in the spectral region around 3000Â cm-1. The spectra of 13C12CH6, 13C2H6 and 13C12C2H8 have been recorded at approximate room temperature and atmospheric pressure for concentrations between 0.325% and 0.750% in nitrogen using an FTIR spectrometer with a resolution of 0.5Â cm-1. For calibration purposes an ethane and a propane spectrum each obtained with a natural isotopologue sample were compared to respective spectra from the Pacific Northwest National Laboratory (PNNL). The spectrum of 13C12CH6 is shifted between 3.5Â cmâ1 and 3.8Â cm-1 towards smaller wavenumbers compared to 12C2H6. The peaks of 13C2H6 ethane were shifted between â4.4Â cm-1 and â7.2Â cm-1 relatively to the corresponding 12C peaks. 13C12C2H8 shows a wavenumber shift of â2Â cmâ1 for the largest central peak at 2965.5Â cm-1 and â6.5Â cm-1 for the second largest peak at 2955Â cm-1. The newly determined cross sections will allow for the first time isotopologue-sensitive spectral analyses of ethane and propane in this spectral region and may be used for applications from atmospheric and planetary research to natural gas exploration.
Related Topics
Physical Sciences and Engineering
Chemistry
Spectroscopy
Authors
Alain Loh, Marcus Wolff,