Influence of synthesis gas composition on Raman spectra of its main components

The main components of the synthesis gas are hydrogen, carbon monoxide, methane and carbon dioxide. In this work, we studied the spectral characteristics of the most intensive Raman bands of these components as a function of environment at a fixed pressure of 25 bar. It has been established that, under these conditions, the change in the characteristics of pure rotational hydrogen lines is negligible, and the vibrational bands of methane, carbon monoxide and carbon dioxide shift to a few tenths of cm–1. The data obtained allow to improve the accuracy of determining the composition of the synthesis gas using Raman spectroscopy.