Catalytic two-stage coal hydrogenation and hydroconversion process
- Denville, NJ
- So. Somerville, NJ
- Yardley, PA
A process for two-stage catalytic hydrogenation and liquefaction of coal to produce increased yields of low-boiling hydrocarbon liquid and gas products. In the process, the particulate coal is slurried with a process-derived liquid solvent and fed at temperature below about 650.degree. F. into a first stage catalytic reaction zone operated at conditions which promote controlled rate liquefaction of the coal, while simultaneously hydrogenating the hydrocarbon recycle oils at conditions favoring hydrogenation reactions. The first stage reactor is maintained at 650.degree.-800.degree. F. temperature, 1000-4000 psig hydrogen partial pressure, and 10-60 lb coal/hr/ft.sup.3 reactor space velocity. The partially hydrogenated material from the first stage reaction zone is passed directly to the close-coupled second stage catalytic reaction zone maintained at a temperature at least about 25.degree. F. higher than for the first stage reactor and within a range of 750.degree.-875.degree. F. temperature for further hydrogenation and thermal hydroconversion reactions. By this process, the coal feed is successively catalytically hydrogenated and hydroconverted at selected conditions, which results in significantly increased yields of desirable low-boiling hydrocarbon liquid products and minimal production of undesirable residuum and unconverted coal and hydrocarbon gases, with use of less energy to obtain the low molecular weight products, while catalyst life is substantially increased.
- Research Organization:
- HYDROCARBON RESEARCH INC
- DOE Contract Number:
- AC22-83PC60017
- Assignee:
- HRI, Inc. (Lawrenceville, NJ)
- Patent Number(s):
- US 4842719
- OSTI ID:
- 867019
- Country of Publication:
- United States
- Language:
- English
Similar Records
Catalytic two-stage coal hydrogenation process using extinction recycle of heavy liquid fraction
Catalytic two-stage coal liquefaction process having improved nitrogen removal
Related Subjects
-875
/208/
10-60
1000-4000
25
650
750
below
carbon gases
catalyst
catalyst life
catalytic
catalytic hydrogenation
catalytic reaction
catalytic two-stage
catalytically
close-coupled
coal
coal feed
coal hydrogen
coal hydrogenation
conditions
controlled
controlled rate
conversion process
conversion reaction
conversion reactions
degree
desirable
directly
energy
favoring
fed
feed
gas
gas product
gas products
gases
hydrocarbon
hydrocarbon gas
hydrocarbon gases
hydrocarbon liquid
hydroconversion
hydroconversion process
hydroconverted
hydrogen
hydrogen partial
hydrogenated
hydrogenated material
hydrogenating
hydrogenation
hydrogenation reaction
increased
increased yield
increased yields
lb
lb coal
life
liquefaction
liquid
liquid product
liquid products
liquid solvent
low-boiling
low-boiling hydrocarbon
maintained
material
minimal
molecular
molecular weight
obtain
oils
operated
partial
partial pressure
partially
partially hydrogenated
particulate
particulate coal
passed
passed directly
pressure
process
process-derived
produce
produce increased
production
products
promote
psig
psig hydrogen
range
rate
reaction
reaction zone
reactions
reactor
reactor space
recycle
residuum
results
selected
significantly
significantly increase
significantly increased
simultaneously
slurried
solvent
space
space velocity
stage
stage catalytic
stage coal
stage reaction
stage reactor
substantially
substantially increase
substantially increased
successively
temperature
temperature below
thermal
two-stage
two-stage catalytic
two-stage coal
unconverted
unconverted coal
undesirable
velocity
weight
weight products
yields
zone
zone maintained