Sequential Thermal Dissolution of Huolinguole Lignite in Methanol and Ethanol

摘要

Thermal dissolution (TD) of coals has advantages, such as milder conditions, simpler process, and no consumption of catalyst and gaseous hydrogen, over coal hydroliquefaction. Extensive investigations have been performed on TD of different coals with various solvents at different temperatures to extract more organic matter from coals. Wei et al. investigated TD of three bituminous coals in tetralin and naphthalene at 300-450 ℃ under N_2 to understand coal dissolution behavior in the initial stage of coal liquefaction. The results show that isometric carbon disulnde/N-methyl-2-pyrrolidinone mixed solvent is effective in extracting the dissolution mixture and that the TD at 350 ℃ significantly increased the coal dissolubility in the mixed solvent. Miura et al.