Fluid-bed pretreatment of bituminous coals and lignite and direct hydrogenation of the chars to pipeline gas. [29 refs; pretreatment in nitrogen, air, CO/sub 2/, steam]

Conference · Tue Jan 01 04:00:00 EST 1957 · Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States)

OSTI ID:5447986

Channabasappa, K C; Linden, H R

The fluid-bed pretreatment of low-rank coals in nitrogen, air, carbon dioxide, and steam atmospheres was investigated in a bench-scale unit at atmospheric pressure, and at maximum temperatures of 400 and 720/sup 0/F, in a study of the production of non-agglomerating, reactive chars suitable for fluid-bed hydrogenation to pipeline gas. Reactivities of the chars in respect to methane and ethane production were determined in batch hydrogenation tests at 1350/sup 0/F, approximately 17 standard cubic feet of hydrogen per pound of char and approximately 3000 psig maximum pressure. The results of this study indicated that the optimum pretreatment temperature is 600/sup 0/F for bituminous coal and 500/sup 0/F for lignite, and that there is little variation in the reactivity of the chars produced in nitrogen, air, and steam atmospheres. The chars produced in a carbon dioxide atmosphere showed consistently lower reactivity. Substantial agglomeration during pretreatment or hydrogasification occurred only with high-volatile bituminous coal. The extent of agglomeration increased with increases in pretreating temperature, and in steam and carbon dioxide atmospheres. Under the routine test conditions, the chars produced 50 to 55 weight percent (moisture-ash-free) of pipeline gas containing 70 to 80 mole percent of methane plus ethane upon reaching a hydrogasification temperature of 1350/sup 0/F. At higher hydrogen/char ratios, substantially higher conversions of pretreated lignite were attained.

• Research Organization: Inst. of Gas Tech., Chicago
• OSTI ID: 5447986
• Conference Information: Journal Name: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403 -- Coal & Coal Products-- Hydrogenation-- (-1987)
010404* -- Coal
Lignite
& Peat-- Gasification
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
BITUMINOUS COAL
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
COAL
DIAGRAMS
ENERGY SOURCES
FLOWSHEETS
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GASES
HIGH BTU GAS
HYDROGENATION
LIGNITE
PRODUCTION