Coal gasification research studies. Final report, August 20, 1982-November 30, 1984

Technical Report · Fri Nov 01 04:00:00 EST 1985

OSTI ID:5967945

The Coal Gasification Research Studies program consists of three tasks: (1) coal ash behavior studies; (2) high-pressure fluidization studies, and (3) high-temperature fluidization studies. Some of the highlighs are as follows: A 2-inch-ID fluidized-bed gasifier was used to investigate the formation of ash agglomerates. Gasification of chars from Pittsburgh Seam and Kentucky No. 11 coals established that the rounded particles with a typical agglomerate microstructure of ferrous aluminate crystals in a ferrous aluminosilicate matrix is the result of thermal decomposition and oxidation of pyrite and its reaction with clay minerals. Viscosity measurements were made on several synthetic slag compositions representative of Eastern coal slags and a sample of slag from Black Butte coal over a temperature range of 1600/sup 0/ to 2500/sup 0/F. On the basis of thermodynamic data, ternary phase diagrams of the iron oxide-silica-alumina system at 0, 5, 10, 15, and 20 weight percent CaO were prepared. In the fluidization studies, computer-assisted pressure probes were developed to experimentally investigate the individual effects of system pressure (up to 450 psig), temperature (up to 180/sup 0/F), particle size, particle density, bed height, and excess fluidization velocity on bubble properties. The effect of system pressure and particle size on the operation of high-velocity fluidized beds was also investigated using 400, 200, and 100 ..mu..m sand up to a maximum pressure of 450 psig. Temperature over the range of 70/sup 0/ to 1800/sup 0/F had no noticeable effect on bubble size, bubble frequency, and bubble velocity. The bubble size correlation developed from the high-pressure bubble study predicted the high-temperature bubble data to within +-30%. 23 refs., 162 figs., 23 tabs.

• Research Organization: Institute of Gas Technology, Chicago, IL (USA)
• DOE Contract Number: AC21-82MC19301
• OSTI ID: 5967945
• Report Number(s): DOE/MC/19301-2036; ON: DE86001073
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
AGGLOMERATION
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASHES
BUBBLES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHARS
CHEMICAL COMPOSITION
COAL GASIFICATION
DATA
DIAGRAMS
ELEMENTS
EXPERIMENTAL DATA
FLOWSHEETS
FLUIDIZATION
FLUIDIZED BEDS
GASIFICATION
INFORMATION
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
MEDIUM PRESSURE
MINERALS
NONMETALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLE SIZE
PHASE DIAGRAMS
PRESSURE EFFECTS
PYRITE
PYROLYSIS PRODUCTS
RESEARCH PROGRAMS
RESIDUES
SAND
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SLAGS
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
VELOCITY
VERY HIGH TEMPERATURE
VISCOSITY