Abstract
A recycle solvent fraction of coal liquid derived from Illinois-coal was hydrotreated by NiMo/Al2O3 and CoMo/Al2O3 catalysts using a fixed-bed reactor at high temperature up to 450°C.
At low temperature under 390°C, the hydrocracking of a heavy fraction was progressed slightly to the same degree by both catalysts. However, product oils with NiMo were higher in H/C and lower in fa than those obtained with CoMo catalyst.
At high temperature of 450°C, the yield of gaseous products and the characteristics of product oils suggested that the removal reaction of alkyl-substituents of coal liquid was progressed and that the activity of NiMo catalyst was higher than that of CoMo catalyst.
