Catalytic two-stage liquefaction of coal utilizing cascading of used ebullated-bed catalyst
A process is described for two-stage catalytic hydrogenation of coal to produce low-boiling hydrocarbon liquid and gaseous products, comprising: feeding particulate coal and a hydrocarbon slurrying oil at oil/coal weight ratio between 1.0 and 4.0 and at temperature below about 700/sup 0/F into a pressurized first stage catalytic reaction zone containing coal-derived liquid and hydrogen and an ebullated bed of particulate hydrogenation catalyst passing the coal and hydrogen upwardly through the first stage ebullated bed of particulate hydrogenation catalyst; withdrawing the resulting partially hydrogenated coal-derived material containing gas and liquid fractions from the first stage rection zone, and passing the material to a second stage catalytic reaction zone together with additional hydrogen for further reacting and hydrocracking the liquid fraction material therein with minimal dehydrogenation reactions to produce gas and lower boiling hydrocarbon liquid effluent materials; withdrawing used catalyst particles; passing the liquid fraction to as distillation step and a liquid-solids separation step, from which a hydrocarbon liquid solvent stream normally boiling above about 600/sup 0/F and containing less than about 30 W% concentration of particulate solids is recycled as coal slurrying oil; and recovering hydrocarbon gas and increased yields of low boiling C/sub 4/-650/sup 0/F hydrocarbon liquid products from the process.
- Assignee:
- HRI, Inc., Lawrenceville, NJ
- Patent Number(s):
- US 4816141
- OSTI ID:
- 6088736
- Resource Relation:
- Patent File Date: Filed date 16 Oct 1987
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL LIQUEFACTION
CATALYSTS
COAL FINES
COAL LIQUIDS
DISTILLATION
EBULLATED BED
HIGH PRESSURE
HIGH TEMPERATURE
HYDROCARBONS
HYDROCRACKING
HYDROGENATION
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
FLUIDS
LIQUEFACTION
LIQUIDS
ORGANIC COMPOUNDS
PYROLYSIS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction