DIRECT COAL LIQUEFACTION PROCESS AND SYSTEM

摘要

A direct coal liquefaction process and system is provided that utilizes a dispersed catalyst and recycle of atmospheric and vacuum fractionator bottoms to produce a maximum yield of jet fuel/diesel or chemical plant feedstock while eliminating all slurry heat exchangers and a slurry preheat furnace. Process hydrogen is preheated in a heat exchanger and, if necessary, in a hydrogen furnace, and mixed with the recycled atmospheric and vacuum fractionator bottoms being fed to the input of the direct liquefaction reactor. Heat for the hydrogen heat exchanger is provided by the overhead from the hot separator receiving the effluent from the direct liquefaction reactor. Product selectivity is controlled by operating conditions.

主权项

1) Apparatus for converting a coal containing solid carbonaceous material feed into Canada liquid fuels, comprising:
a. a direct coal liquefaction (DCL) reactor for directly converting such solid carbonaceous material at elevated temperatures and pressures in the presence of a solvent and a catalyst for producing hydrocarbon products; b. an atmospheric fractionator for separating hydrocarbon products of said DCL reactor into different boiling point fractions, including a nominal 650° F.+(343° C.+) fraction; c. a vacuum fractionator for separating a portion of said 650° F.+ fraction from the atmospheric fractionator into nominal 650° F. to 1000° F. (343° C. to 538° C.) and nominal 1000° F.+(538° C.+) fractions; d. a slurry mix tank for mixing a portion of said 650° F.+(343° C.+) fraction and at least a portion of said 1000° F.− (538° C.−) fraction with feed coal containing solid carbonaceous material to form a slurry; e. a pump for feeding slurry produced in the slurry mix tank to the input of said direct liquefaction reactor with substantially no further heating of the portion of the slurry produced by the liquefaction reactor beyond that which occurred in the liquefaction reactor; and f. a heat exchanger for preheating hydrogen being fed to the input of the direct liquefaction reactor to raise the temperature of the combined slurry and hydrogen being fed to the input of the direct liquefaction reactor to at least about 660° F.