Study of inertinite components by IR spectroscopy

The paper presents the results of a study by IR spectroscopy of inertinite concentrates isolated from humus coals of various stages of metamorphism. It was revealed that in the studied samples there is a rather significant intensity of absorption bands characteristic of aromatic structures (D3040, D1620, D900-750 cm⁻¹). To characterize the chemical maturity of inertinites, we used the parameter D3040/D2920 (the ratio of the optical densities of CH unsaturated and CH aliphatic bonds). It was found that the D3040/D2920 parameter increases with an increase in the vitrinite reflectance. The data obtained showed that the components of the inertinite group are characterized by a reduced number of aliphatic groups and a more developed spatial polyconjugation system. (paper)