Determination of the distribution of ash, pyrite and basic constituents in coal particles

Conference · Thu Jan 01 04:00:00 EST 1987 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5974589

Mason, D M; Chao, S S

In fluidized-bed gasification of high-sulfur coals, such as the KRW and U-GAS processes, relatively low melting ash is produced by reaction of iron from pyrite with the siliceous components produced from clays and quartz. To prevent catastrophic growth of ash clinkers and defluidization of the bed, ash in the bed must be limited to 40 to 50 weight percent. As a result of this low ash content of the bed, the ash must be agglomerated to facilitate its removal from the bed without unacceptable loss of char carbon and decrease of gasification efficiency. To obtain a detailed understanding of the behavior of mineral matter and ash in fluidized-bed gasification, a fundamental research investigation is in progress at IGT under a program supported by the US Department of Energy. We envision that the initial formation of ash reaction products occurs by reaction of the minerals present in single particles of char formed from single particles of coal. The oxide composition of the ash of single particles determines their melting point, viscosity and potential for agglomeration. In this paper we report the results of the application of some methods of investigation of ash composition in single particles of coal.

• Research Organization: Institute of Gas Technology, Chicago, IL (USA)
• OSTI ID: 5974589
• Report Number(s): CONF-870802-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 32:4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ASH CONTENT
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
COAL
COAL GASIFICATION
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
GASIFICATION
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERALS
NUMERICAL DATA
PARTICLE SIZE
PARTICLES
PYRITE
PYROLYSIS PRODUCTS
SIZE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS