Mixture of coal and cellulose was liquefied in supercritical water (400℃, 25MPa), and yields of residue, liquid and gas were compared with the result of separate liquefaction of coal and cellulose. Co-liquefaction does not reduce the residue yield, but leads to a higher liquid yield. Addition of nickel catalyst results in a higher gas yield and a smaller residue yield. Hydrogen is produced by nickel catalyst, but is not utilized in coal liquefaction effectively.
