The invention comprises rapidly passing a fluid stream of the feedstock, coal, liquids, oils, etc., through a reactor containing a packed or stationary bed of desulfurization cracking catalyst pellets under heat and pressure while simultaneously passing a reducing gas (e.g., H2) through the bed at a flowrate substantially higher than the turbulent flow. The combination of turbulent flow and a stationary reactor bed of catalytic pellets maintains continuous activity and rapid desulfurization and minimum liquefaction consumption of reducing gas. The reaction conditions in the reactor comprise a temperature of 300 deg.-500 Deg. C, preferably 400 deg.-460 Deg. C, and a pressure of 500-40,000, preferably 1,500-4,500 psig. The packed catalyst bed may comprise al2o3 pellets impregnated with CO and mo, or ni and mo, with or without sio2, or a mixture of other metals.
U.S. Pat. 3,840,456; Oct. 8, 1974; Chem. Abstr. 82:33,232Y