Fluidization characteristics of coal gasification materials. [41 refs]

Conference · Thu Jan 01 04:00:00 EST 1976

OSTI ID:7219388

Babu, S; Shah, B; Talwalkar, A

General design principles that have been developed for other industries can be applied to coal conversion systems only after suitable modifications, to account for differences in types of materials handled or for differences in processing conditions. Fluidization, which plays a major part in coal conversion technology, is one such area. Under an ERDA contract to develop a Coal Conversion Systems Technical Data Book, the Institute of Gas Technology is reviewing the available methods and correlations required to design fluidized beds. The design formulas and correlations were evaluated for the coal gasification materials including coal, char, limestone, dolomite, and iron ore. The published data used to evaluate these correlations covered a wide range of operating conditions: particle diameters, 70 to 2870 microns; particle densities, 16 to 245 lbs/CF; bed diameters, 1 to 11.5 inches; bed heights, 4 to 50 inches; operating pressures, 14.7 to 1015 psia; and fluidizing gas density, 0.005 to 5 lbs/ft/sup 3/. The characteristics of the gas-solids system and the operating conditions of coal gasifiers being different from most of the commonly tested fluidized beds, some of the published correlations were found to be inadequate. Wherever required, empirical correlations were developed and compared with the published data. This paper discusses the findings related to the minimum fluidization velocity and fluidized-bed expansion ratio or bed density. The use of correlations descriptive of bubble characteristics to interpret bed expansion is also investigated.

• Research Organization: Institute of Gas Technology, Chicago, IL (USA)
• OSTI ID: 7219388
• Report Number(s): CONF-761109-14
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ALKALINE EARTH METAL COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CARBONATES
CHARS
COAL
COAL GASIFICATION
DENSITY
DESIGN
DOLOMITE
ENERGY SOURCES
FLUIDIZATION
FLUIDIZED BED
FOSSIL FUELS
FUELS
GASIFICATION
IRON ORES
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
ORES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHYSICAL PROPERTIES
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SIZE
THERMOCHEMICAL PROCESSES