Pressure broadening in Raman spectra of CH4–N2, CH4–CO2, and CH4–C2H6 gas mixtures

A simple model to simulate the Raman spectrum of methane in the range of 2800–3040 cm−1

“…As a result, the molecular environment of methane slows down the process of merging the ethane lines that was demonstrated in previous studies. 28,70,73…”

“…The obtained results are in general agreement with previous measurements. 21,70 Unpolarized spectra of a gas mixture containing 65/35 mol% CH 4 /C 2 H 6 at pressures of 1, 10, and 20 bar were recorded to test the validity of the retrieved coefficients b, c, e, and f for the ethane environment simulation (see Figure S3). The difference between experimental and simulated spectra in the region of the ν 3 methane lines is comparable with the fit residuals from simultaneously fitting spectra of pure methane.…”