Process for coal liquefaction in staged dissolvers
Patent
·
OSTI ID:864805
There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a pasting oil, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals, are separated from the condensed reactor effluent. In accordance with the improved process, the first dissolver is operated at a higher temperature than the second dissolver. This temperature sequence produces improved product selectivity and permits the incorporation of sufficient hydrogen in the solvent for adequate recycle operations.
- Research Organization:
- International Coal Refining Company, Allentown, PA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-78OR03054
- Assignee:
- International Coal Refining Company (Allentown, PA)
- Patent Number(s):
- 4,421,630
- Application Number:
- 06/308,639
- OSTI ID:
- 864805
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/208/
acceptable
acceptable manner
accordance
adequate
ash
carbonaceous
carbonaceous material
coal
coal liquefaction
coal macerals
condensed
converted
costly
described
dissolver
dissolvers
effluent
elevated
elevated temperature
elevated temperatures
environmentally
environmentally acceptable
equipment
fuel
gas
gas scrubbing
gases
hydrogen
hydrogen-rich
hydrogen-rich gas
hydrogen-rich gases
improved
improved liquefaction
improved process
improved product
including
including mineral
incorporation
liquefaction
liquefaction process
macerals
manner
material
mineral
mineral ash
oil
operated
operations
passed
pasting
permits
preheater
presence
pressures
process
produces
product
product selectivity
reactor
reactor effluent
recycle
rich gas
scrubbing
selectivity
separated
sequence
series
slurried
solids
solvent
staged
staged dissolvers
sufficient
sulfur
sulfur carbonaceous
temperature
temperatures
unconverted
unconverted coal
acceptable
acceptable manner
accordance
adequate
ash
carbonaceous
carbonaceous material
coal
coal liquefaction
coal macerals
condensed
converted
costly
described
dissolver
dissolvers
effluent
elevated
elevated temperature
elevated temperatures
environmentally
environmentally acceptable
equipment
fuel
gas
gas scrubbing
gases
hydrogen
hydrogen-rich
hydrogen-rich gas
hydrogen-rich gases
improved
improved liquefaction
improved process
improved product
including
including mineral
incorporation
liquefaction
liquefaction process
macerals
manner
material
mineral
mineral ash
oil
operated
operations
passed
pasting
permits
preheater
presence
pressures
process
produces
product
product selectivity
reactor
reactor effluent
recycle
rich gas
scrubbing
selectivity
separated
sequence
series
slurried
solids
solvent
staged
staged dissolvers
sufficient
sulfur
sulfur carbonaceous
temperature
temperatures
unconverted
unconverted coal