Abstract
Fundamental reactions in coal liquefaction process in the presence of hydrogen-donor solvent was explained, and the effect of coal property along with reaction conditions such as temperature, time and solvent on the chemical structure of SRC was briefly reviewed. Recent progress on the separation tequniques and chemical analysis made clear that SRC was composed of many fractions from oils to asphaltols with high aromaticity. The fate of oxygen-containing structure during the coal liquefaction process was also discussed.
