Liquefaction tests were conducted on Wyoming coal at 1t/d Process Supporting Unit (PSU). And the effect of liquefaction reaction conditions (reaction pressure, amount of catalyst addition, G/L and Δfa of recycle solvent) on the product yield was studied. From the result, reaction mechanism was considered and reaction model was constructed. And it was estimated that the conditions for the maximum oil yield were the combination of the maximum operating conditions within the range of PSU operating conditions. As the result of the operation at the conditions, the liquefied oil yield was in good agreement with the calculated value.
