Selection of suitable coal for liquefaction according to the various influencing factors

Direct coal liquefaction is a kind of clean coal technology. Its substantively is to convert solid coal into liquid oil by hydrogenation to reduce H/C ratio under certain temperature, hydrogen pressure, solvent and catalyst etc. conditions. Nitrogen, oxygen, sulfur and other heteroatoms were removed from coal at the same time. Coal liquefaction is not only conducive to improve the utilization of coal resources, but also would ease China's oil tense situation. Improve the conversion efficiency of coal is the focus of coal liquefaction research, and the influence factor on coal liquefaction rate were discussed in this paper. It mainly related to coal type, temperature, pressure, solvent, coal petrographic macerals and catalysts.