Thus article presents the results of studies of polyaromatic hydrocarbons (PAHs) in oil shales of the Barzas (Barzassite) and Budagovo (Sapropelite) deposits and their ash residues obtained upon thermal destruction at T = 300, 500, and 750°C with free access of oxygen. A set of physicochemical methods of analysis (extraction, infrared spectroscopy, and high-performance liquid chromatography) made it possible to establish the composition of priority PAHs of the oil shales and track changes occurring under thermal action. As a result of this work, it was shown that the yield of oil shale ash residues depended on the initial composition of oil shales and ranged from 5 to 82 wt % depending on the destruction temperature. The PAH content of the ash residues did not exceed 9.5 rel %.
