Fluidized bed selective pyrolysis of coal

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868588

Shang, Jer Y ^[1]; Cha, Chang Y ^[2]; Merriam, Norman W ^[3]

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1. McLean, VA
2. Golden, CO
3. Laramie, WY

The present invention discloses a process for the pyrolysis of coal which comprises the effective utilization of two zonal inclined fluidized beds, where said zones can be selectively controlled as to temperature and heating rate. The first zonal inclined fluidized bed serves as a dryer for crushed coal and additionally is controlled to selectively pyrolyze said coal producing substantially carbon dioxide for recycle use. The second zonal inclined fluidized bed further pyrolyzes the coal to gaseous, liquid and char products under controlled temperature and heating rate zones designed to economically integrate the product mix. The gas and liquid products are recovered from the gaseous effluent stream while the char which remains can be further treated or utilized in a subsequent process step.

• Research Organization: WESTERN RESEARCH INSTITUTE
• DOE Contract Number: AC21-87MC24268
• Assignee: Western Research Institute (Laramie, WY)
• Patent Number(s): US 5171406
• OSTI ID: 868588
• Country of Publication: United States
• Language: English

Related Subjects

fluidized
bed
selective
pyrolysis
coal
discloses
process
comprises
effective
utilization
zonal
inclined
beds
zones
selectively
controlled
temperature
heating
rate
serves
dryer
crushed
additionally
pyrolyze
producing
substantially
carbon
dioxide
recycle
pyrolyzes
gaseous
liquid
char
products
designed
economically
integrate
product
mix
gas
recovered
effluent
stream
remains
treated
utilized
subsequent
step
heating rate
fluidized beds
controlled temperature
carbon dioxide
fluidized bed
liquid products
liquid product
selectively controlled
producing substantially
inclined fluidized
crushed coal
process step
subsequent process
effluent stream
gaseous effluent
selectively control
rate zones
product mix
/201/