Abstract
The hydrogenation of Yubari coal impregnated with Znl 2 was carried out at 400 °C for 3 h in a batch autoclave system. The conversion exceeded 83% of daf coal when Znl 2 was used at 1 wt % of dry coal. The yield and the average molecular weight of asphaltene showed maxima at 1 wt % Znl 2. Longer reaction times brought higher yields of gases and oil and a lower yield of asphaltene; however, extremely long reaction time caused recombination of asphaltene fragments. A binary mixture of metal halides, ZnX 2/CuX, showed higher activity than ZnX 2. The hydrogenation of other Japanese coals was studied for comparison with that of Yubari coal under the same conditions.
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