水素化溶媒を用いる石炭のソルボリシス ＩＩＩ 水素化多環芳香族炭化水素溶媒

Abstract

Solvolysis liquefaction of subbituminous coal by short contact time at high temperature has been investigated using polycyclic hydroaromatic hydrocarbons, the main components of hydrogenated anthracene oil (H-AO), as solvents to determine the effective components of H-AU for liquefaction.Hydroaromatics were better solvents for liquefaction than the corresponding aromatics and yielded benzene-and quinoline-soluble fractions of coal in up to about 80% and 95%, respectively by solvolysis at 450°C for 10 min. Liquefaction reached sufficient levels with di- or tetrahydroaromatics. Overhydrogenation of solvent was not effective for liquefaction and is believed to be a waste of hydrogen.The hydroaromatics with naphthenic ring structure were hydrogen-donor species to coal; they were converted to the corresponding aromatics in the analyses of the solvolysis products. The liquefaction abilities of hydroaromatics increased in theorder of di-, tri-, and tetracyclic hydroaromatics. Tetrahydrofluoranthene and hydropyrenes were better solvents for liquefaction than any other hydroaromatics examined.