Thermal dissolution

Thermal dissolution is a method of liquefaction of solid fossil fuels. It is a hydrogen-donor solvent refining process. It may be used for the shale oil extraction and coal liquefaction.^[1] Other liquids extraction processes from solid fuels are pyrolysis and hydrogenation.^[2] Compared to hydrogenation, the process of thermal dissolution has milder conditions, simpler process, and no consumption of catalyst.^[3]