Generation of pitch-like products by the thermal dissolution of coal in heavy semicoking tar

Abstract

The influence of hydrogenating upgrading of heavy semicoking tar from long-flame coal on its properties and composition is studied when it is used as the solvent in the thermal dissolution of bituminous gas coal (GZh coal). It was found that the concentration of oxygen-bearing compounds declines on catalytic hydrogenation of tar at 5 MPa and on combined treatment with two hydrogen donors: tetralin and the anthracene oil. After hydrogenating treatment, the heavy semicoking tar may be used as the solvent in the thermal dissolution of GZh coal so as to obtain pitch-like products.