Catalytic two-stage coal liquefaction process having improved nitrogen removal
- Yardley, PA
A process for catalytic multi-stage hydrogenation and liquefaction of coal to produce high yields of low-boiling hydrocarbon liquids containing low concentrations of nitogen compounds. First stage catalytic reaction conditions are 700.degree.-800.degree. F. temperature, 1500-3500 psig hydrogen partial pressure, with the space velocity maintained in a critical range of 10-40 lb coal/hr ft.sup.3 catalyst settled volume. The first stage catalyst has 0.3-1.2 cc/gm total pore volume with at least 25% of the pore volume in pores having diameters of 200-2000 Angstroms. Second stage reaction conditions are 760.degree.-870.degree. F. temperature with space velocity exceeding that in the first stage reactor, so as to achieve increased hydrogenation yield of low-boiling hydrocarbon liquid products having at least 75% removal of nitrogen compounds from the coal-derived liquid products.
- Research Organization:
- 0778886 INC
- DOE Contract Number:
- AC22-88PC88818
- Assignee:
- HRI, Inc. (Princeton, NJ)
- Patent Number(s):
- US 5045180
- OSTI ID:
- 867963
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
two-stage
coal
liquefaction
process
improved
nitrogen
removal
multi-stage
hydrogenation
produce
yields
low-boiling
hydrocarbon
liquids
containing
concentrations
nitogen
compounds
stage
reaction
conditions
700
degree
-800
temperature
1500-3500
psig
hydrogen
partial
pressure
space
velocity
maintained
critical
range
10-40
lb
catalyst
settled
volume
3-1
cc
gm
total
pore
25
pores
diameters
200-2000
angstroms
760
-870
exceeding
reactor
achieve
increased
yield
liquid
products
75
coal-derived
stage catalytic
hydrogen partial
liquids containing
psig hydrogen
hydrocarbon liquid
reaction conditions
liquefaction process
coal liquefaction
partial pressure
liquid products
liquid product
catalytic reaction
stage reactor
coal-derived liquid
low-boiling hydrocarbon
pore volume
nitrogen compounds
two-stage coal
space velocity
nitrogen compound
stage reaction
catalytic two-stage
catalytic multi-stage
nitrogen removal
lb coal
stage catalyst
hydrocarbon liquids
stage hydrogenation
stage coal
achieve increased
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