Raman Spectra of Nitrogen,Carbon Dioxide,and Hydrogen in a Methane Environment |
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| Authors: | D V Petrov I I Matrosov D O Sedinkin A R Zaripov |
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| Institution: | 1.Institute of Monitoring of Climatic and Ecological Systems, Siberian Branch,Russian Academy of Sciences,Tomsk,Russia;2.Tomsk State University,Tomsk,Russia |
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| Abstract: | Changes in the Raman spectra of N2, H2, and CO2 are studied in the range of 200–3800 cm–1 depending on the concentration of surrounding CH4 molecules at a fixed medium pressure of 25 atm and temperature of 300 K. It has been found that changes in the spectral characteristics of purely rotational H2 lines in a CH4 medium are negligible, while the Q-branches of the v1/2v2 Fermi dyad in СO2 become narrower and wavenumbers of its high-frequency component and v1 band of N2 decrease. In addition, under these conditions, the ratio of intensities of the CO2 Fermi dyad Q-branch varies in proportion to the concentration of surrounding molecules of CH4. The obtained data will be used in diagnosing the composition of natural gas using Raman spectroscopy. |
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