Process for clean-burning fuel from low-rank coal

Patent · Tue Jun 21 00:00:00 EDT 1994

OSTI ID:7295693

Merriam, N W; Sethi, V; Brecher, L E

A process is described 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. 1 fig.

• DOE Contract Number: FC21-86MC11076
• Assignee: Western Research Inst., Laramie, WY (United States)
• Patent Number(s): US 5322530; A
• Application Number: PPN: US 7-963793
• OSTI ID: 7295693
• Resource Relation: Patent File Date: 20 Oct 1992
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
DRYING
PYROLYSIS
SOLID FUELS
PRODUCTION
COAL RANK
COAL TAR
FIRE HAZARDS
MITIGATION
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
HAZARDS
MATERIALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
TAR
THERMOCHEMICAL PROCESSES
010300* - Coal
Lignite
& Peat- Preparation- (1987-)
010409 - Coal
Lignite
& Peat- Pyrolysis & Carbonization- (1987-)