Liquefaction of Miike Coal Using Tetralin

TAGAYA Hideyuki, CHIBA Koji, SATO Shimio, MIYASHITA Kazuya, SAGAWA Masato

doi:10.1246/nikkashi.1983.1181

This study was carried out to clarify the liquefaction mechanism of Miike coal. The results were compared with those of Taiheiyo coal on the basis of multiple regression analysis (Table 4, Fig.1). Two kinds of Miike coal, Miike coal-1 (high ash content) and Miike coal-2 (low ash content) were used for this study (Table 1). In the liquefaction of Miike coal-1, conversion-BC and SRC yield were increased with an increase in temperature and initial pressure (Table 4, Fig.2, 3). The value of conversioBC under 112 pressure was higher than that under N2 pressure. In the liquefaction of Miike conversion-BC and SRC yield were increased with an increase in temperature, but changed slightly with an increase in initial pressure (Table 4, Fig.4). It was considered that the difference in liquefaction behavior between Miike coal-1and Miike coal-2 might be caused not only by the difference in the chemical structure of coal, but: also by the difference in the type of mineral matters in coal. The amount of transferred hydrogen from solvent to coal were calculated by the composition of the recovered solvent (Fig.5). By the results of NMR study, structural parameters ti, n, and fa of SRC were calculated. In the liquefaction of Miike coal-1, two reaction mechanisms were proposed. The values of a, n, and fa did not change with reaction conditions. In the liquefaction of Miike coal-2, the values of a and n changed with reaction conditions, but that of je., didn't.

Liquefaction of Miike Coal Using Tetralin

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