Jun 1, 2018 · Three methods have been studied for deriving the CO 2 concentration from the Raman spectra (the peak intensity ratio, the integrated intensity ratio, the contour fit method). The best results were obtained when the contour fit method is applied for Raman spectra processing.

Raman spectroscopy of CO 2. The CO 2 content in gases or liquids can be determined based on the CO 2 Raman spectrum, which makes Raman spectroscopy a powerful process analytical technology for CO 2 detection.

Feb 1, 2007 · We have examined the solute–solvent interactions by measuring Raman spectra of CO 2 in neat supercritical CO 2 (sc-CO 2), and sc-CO 2 containing β-diketones (acetylacetone, trifluoroacetylacetone, and hexafluoroacetylacetone) and uranyl β-diketonato complex [UO 2 (hfacac) 2 DMSO] (hfacac: hexafluoroacetylacetone, DMSO: dimethyl sulfoxide).

Jan 1, 2025 · In this paper, we present a comprehensive simulation of CO 2 Raman spectra, building on the works of previous studies [6], [8], [9], [11]. Our approach includes both isotropic and anisotropic scattering and encompasses pure vibrational Q as well as ro-vibrational O, P, R and S branch transitions.

The Raman quantification factor F (CH4)/F (CO2) was demonstrated to be near a constant value of 5.048 ± 0.4 and was used to determine the CH4 to CO2 molar ratio in an unknown CO2-CH4‐bearing ...

Three methods have been studied for deriving the CO2 concentra-tion from the Raman spectra (the peak intensity ratio, the integrated intensity ratio, the contour fit method). The best results were obtained when the contour fit method is applied for Raman spectra pro-cessing.

Oct 29, 2023 · Here, we report on in-situ non-destructive analyses of the C stable isotopic composition of CO 2, applying a novel high-resolution Raman configuration on 42 high-density CO 2 fluid inclusions...

At constant temperature, Raman peak position, − including the more intense CO2 peak (ν+), decreases (shifts to lower wave number) with increasing pressure for all three gases over the entire pressure and temperature (PT) range studied.

Nov 30, 2020 · The Raman spectral behavior of N 2, CO 2, and CH 4 in ternary N 2 –CO 2 –CH 4 mixtures was studied from 22°C to 200°C and 10 to 500 bars. The peak position of N 2 in all mixtures is located at lower wavenumbers compared with pure N 2 at the same pressure (P)–temperature (T) (PT) conditions.

Dec 19, 2019 · At constant temperature, Raman peak position, including the more intense CO 2 peak (ν+), decreases (shifts to lower wave number) with increasing pressure for all three gases over the entire pressure and temperature (PT) range studied.