Co-liquefaction of Coal with Lignin. Effects of Kind of Coal and Reaction Temperature.:Effects of Kind of Coal and Reaction Temperature

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Co-liquefaction of coal with lignin was studied using several kinds of coals. The co-liquefaction behavior were greatly dependent upon the coal used and reaction temperature. In case of Yallourn coal, the co-liquefaction yielded much oil and asphaltene than expected from separate liquefaction properties of coal and lignin, being found to be accelerated with lignin addition. In cases of Miike and Horonai coals, however, lignin addi-tion did not show favarable effects on the co-liquefaction. Both favarable and non-favarable effects were observed very clearly at around 350°C. These results indicated that lignin had abilities both of accelerating and of retarding the co-liquefaction, and it was dependent upon co-liquefaction conditions which ability emerged. A co-liquefaction mechanism was speculated from the results of liquefaction experiments of the coals in the presence of a model compound of lignin.
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