Solvent Effect of Coal Derived Aromatic Compounds on the Liquefaction of Akabira Coal

Abstract

The dissolution of coal in an anthracene oil, a creosote oil, and a single component of coal derived oil was attempted in order to investigate the dissolving property of various aromatic compounds (Table 2). It was indicated that coal conversion was conducted more efficiently in tricyclic compounds than in bicyclic compounds and remarkably enhanced by the addition of hydrogen-donor solvent (Table 4, Fig. 1). Addition of naphthol and quionline to tetralin resulted in a marked increase in the coal conversion probably because of the acceleration of cleavage of coal structure. Di- and octahydrophenanthrene were found to be superior to tetralin in the hydrogen-donating property (Table 4, 5). Moreover, the effect of solvent on the properties of Solvent Refined Coal was discussed and the properties of asphaltene and preasphaltene were compared with each other (Table 6, Fig. 2).