Fluidized bed selective pyrolysis of coal

Patent · Tue Dec 15 04:00:00 EST 1992

OSTI ID:7279618

Shang, J Y; Cha, C Y; Merriam, N W

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 pyrolyses 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. 9 figs.

• DOE Contract Number: AC21-87MC24268
• Assignee: Western Research Inst., Laramie, WY (United States)
• Patent Number(s): A; US 5171406
• Application Number: PPN: US 7-599322
• OSTI ID: 7279618
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010409* -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL GAS
COAL LIQUIDS
CONTROL
DECOMPOSITION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GASES
LIQUIDS
MATERIALS
PROCESS CONTROL
PYROLYSIS
PYROLYSIS PRODUCTS
SYNTHESIS
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES