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Title: Fluidized bed gasification of extracted coal

Abstract

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.

Inventors:
; ; ;
Publication Date:
OSTI Identifier:
5725176
Application Number:
ON: DE85011631
Assignee:
Dept. of Energy
DOE Contract Number:  
AC01-78ET13005
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Aquino, D C, DaPrato, P L, Gouker, T R, and Knoer, P. Fluidized bed gasification of extracted coal. United States: N. p., 1984. Web.
Aquino, D C, DaPrato, P L, Gouker, T R, & Knoer, P. Fluidized bed gasification of extracted coal. United States.
Aquino, D C, DaPrato, P L, Gouker, T R, and Knoer, P. Fri . "Fluidized bed gasification of extracted coal". United States.
@article{osti_5725176,
title = {Fluidized bed gasification of extracted coal},
author = {Aquino, D C and DaPrato, P L and Gouker, T R and Knoer, P},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {7}
}