Abstract
The influence of solvent was examined in the single- and two-stage liquefaction of Tanito Harum coal with FeNi supported oil carbon black (FeNi/KB) and a synthetic pyrite. FeNi/KB catalyst provide a high oi l yield in the single-stage liquefaction when tetralin or 1methylnapthalene was used, while pyrite (FeS 2 ) gave a low oil yield in the liquefaction with 1- methylnapthalene although it produced a high enough oil yield in the liquefaction with tetralin. The single-stake liquefaction of coal gave extremely low oil yields under the solvent free conditions for all catalysts examined. In the liquefaction of coal with solvent, the difference of oil yield produced between single-stage and two stage is small. However, the conversion of H-- donor solvent after liquefaction was much lower than that of single-stage liquefaction. In the free-solvent liquefaction coal, two-stage liquefaction produced much higher oil yield than single-stage. Kata kunci: solvent, catalyst, single-stage coal liquefaction, two-stage coal Liquefaction
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