Process for clean-burning fuel from low-rank coal

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869361

Merriam, Norman W ^[1]; Sethi, Vijay ^[1]; Brecher, Lee E ^[1]

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1. Laramie, WY

A process for upgrading and stabilizing low-rank coal involving the sequential processing of the coal through three fluidized beds; first a dryer, then a pyrolyzer, and finally a cooler. The fluidizing gas for the cooler is the exit gas from the pyrolyzer with the addition of water for cooling. Overhead gas from pyrolyzing is likely burned to furnish the energy for the process. The product coal exits with a tar-like pitch sealant to enhance its safety during storage.

• Research Organization: Western Research Institute (Laramie, WY)
• DOE Contract Number: FC21-86MC11076
• Assignee: Western Research Institute (Laramie, WY)
• Patent Number(s): US 5322530
• OSTI ID: 869361
• Country of Publication: United States
• Language: English

Related Subjects

process
clean-burning
fuel
low-rank
coal
upgrading
stabilizing
involving
sequential
processing
fluidized
beds
dryer
pyrolyzer
finally
cooler
fluidizing
gas
exit
addition
water
cooling
overhead
pyrolyzing
burned
furnish
energy
product
exits
tar-like
pitch
sealant
enhance
safety
storage
fluidizing gas
fluidized beds
fluidized bed
low-rank coal
rank coal
exit gas
overhead gas
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