Patent ID: 8366911

Claim:
A method of producing a liquid fuel comprising the steps of: hydrotreating an FT wax produced by a Fischer-Tropsch synthesis containing paraffinic hydrocarbons each having 20 to 100 carbon atoms as main components in a presence of hydrotreating catalyst at a temperature of 200 to 350° C., at the liquid hourly space velocity of 0.1 to 5.0 h −1 , and under a partial pressure of hydrogen in a range from 0.5 to 8 MPa to obtain an effluent oil; and fractionating the effluent oil to obtain middle distillate including a gas oil with a cetane number of 75 or more and with a pour point of −27.5° C. or lower at a yield of the middle distillate oil of 55% or more with respect to a total weight of the FT wax, wherein the hydrotreating catalyst includes an active metal component comprising platinum or palladium supported on a carrier containing an amorphous solid acid, and a ultra-stable Y-type zeolite with an average particle diameter of 0.2 to 1.0 μm, a crystallinity of 1.02 to 1.10 based on a standard Y-type zeolite basis, and a specific surface area of 700 to 790 m 2 /g, and also the hydrotreating catalyst has functions of dehydrogenating, isomerizing, hydrocracking, and hydrogenating hydrocarbons.