Fluidized bed gasification of extracted coal

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865942

Aquino, Dolores C ^[1]; DaPrato, Philip L ^[2]; Gouker, Toby R ^[3]; Knoer, Peter ^[1]

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1. Houston, TX
2. Westfield, NJ
3. Baton Rouge, LA

Coal or similar carbonaceous solids are extracted by contacting the solids in an extraction zone (12) with an aqueous solution having a pH above 12.0 at a temperature between 65.degree. C. and 110.degree. 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.

• Research Organization: Exxon Research and Engineering Co
• DOE Contract Number: ET-78-C-01-2777
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4604105
• OSTI ID: 865942
• Country of Publication: United States
• Language: English

Related Subjects

fluidized
bed
gasification
extracted
coal
similar
carbonaceous
solids
contacting
extraction
zone
12
aqueous
solution
ph
temperature
65
degree
110
period
time
sufficient
remove
bitumens
gasified
elevated
pressure
60
density
maintained
value
160
kg
preferred
embodiment
water
removed
redeposit
prior
step
carbonaceous solid
gasification zone
bed gasification
time sufficient
fluidized bed
preferred embodiment
aqueous solution
carbonaceous solids
elevated pressure
similar carbonaceous
extraction zone
extracted coal
/48/