Determination of the distribution of ash, pyrite and basic constituents in coal particles
Conference
·
OSTI ID:6889357
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. It is envisioned 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 the results of the application of some methods of investigation of ash composition in single particles of coal are reported. 6 refs., 6 figs., 3 tabs.
- Research Organization:
- Institute of Gas Technology, Chicago, IL (USA)
- DOE Contract Number:
- AC21-84MC21313
- OSTI ID:
- 6889357
- Report Number(s):
- CONF-8708275-1; ON: DE88017153
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010600 -- Coal
Lignite
& Peat-- Properties & Composition
AEROSOL WASTES
AGGLOMERATING ASH PROCESS
ALKALINE EARTH METAL COMPOUNDS
ASH CONTENT
ASHES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COMBUSTION
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLY ASH
FOSSIL FUELS
FUELS
GASIFICATION
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
MATERIALS
MINERALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PARTICULATES
PYRITE
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
SIZE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
WASTES
010404* -- Coal
Lignite
& Peat-- Gasification
010600 -- Coal
Lignite
& Peat-- Properties & Composition
AEROSOL WASTES
AGGLOMERATING ASH PROCESS
ALKALINE EARTH METAL COMPOUNDS
ASH CONTENT
ASHES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
COMBUSTION
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLY ASH
FOSSIL FUELS
FUELS
GASIFICATION
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
MATERIALS
MINERALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PARTICULATES
PYRITE
PYROLYSIS PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
RESIDUES
SIZE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
WASTES