Depolarization ratio of the ν1 Raman band of pure CH4 and perturbed by N2 and CO2

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Depolarization ratio of the v1 Raman band of pure CH4 and perturbed by N2 and CO2	2 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.3390/molecules27010144

Title: Depolarization ratio of the ν1 Raman band of pure CH4 and perturbed by N2 and CO2
Creator: Tanichev, Alexander S.
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Petrov, Dmitry Vitalievich
Date: 2022
DOI: 10.3390/molecules27010144
Description: In this work, the effect of nitrogen and carbon dioxide on the depolarization ratio of the ν1 band of methane in the pressure range of 0.1–5 MPa is studied. A high-sensitivity single-pass Raman spectrometer was used to obtain accurate results. Moreover, we took into account the overlap of the ν1 band by the ν3 and ν2+ν4 bands using the simulation of their spectra. The depolarization ratio of the ν1 band in pure methane is within 0–0.001, and the effect of nitrogen and carbon di-oxide on this parameter is negligible in the indicated pressure range. The obtained results are useful for correct simulation of the Raman spectrum of methane at different pressures, which is necessary to improve the accuracy of gas analysis methods using Raman spectroscopy