Fluidized bed gasification of extracted coal

Patent · Fri Jul 06 00:00:00 EDT 1984

OSTI ID:5725176

Aquino, D C; DaPrato, P L; Gouker, T R; Knoer, P

Coal or similar carbonaceous solids are extracted by contacting the solids in an extraction zone with an aqueous solution having a pH above 12.0 at a temperature between 65/sup 0/C and 110/sup 0/C for a period of time sufficient to remove bitumens from the coal into said aqueous solution, and the extracted solids are then gasified at an elevated pressure and temperature in a fluidized bed gasification zone (60) wherein the density of the fluidized bed is maintained at a value above 160 kg/m/sup 3/. In a preferred embodiment of the invention, water is removed from the aqueous solution in order to redeposit the extracted bitumens onto the solids prior to the gasification step. 2 figs., 1 tab.

• DOE Contract Number: AC01-78ET13005
• Assignee: Dept. of Energy
• Application Number: ON: DE85011631
• OSTI ID: 5725176
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BITUMENS
EXTRACTION
CATALYSTS
IMPREGNATION
COAL
SWELLING
COAL GASIFICATION
FLUIDIZED BED
DENSITY
AQUEOUS SOLUTIONS
DEPOSITION
EXPERIMENTAL DATA
FLOWSHEETS
HIGH TEMPERATURE
MEDIUM TEMPERATURE
SODIUM HYDROXIDES
ALKALI METAL COMPOUNDS
CARBONACEOUS MATERIALS
DATA
DIAGRAMS
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
MATERIALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
TAR
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification