Coal pretreatment for two stage liquefaction. Quarterly report, October 1-December 31, 1984

Technical Report · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6080133

Derbyshire, F J; Luckie, P T

Studies have been made of the changes in petrographic composition of Illinois No. 6 and Wyodak coals caused by crushing and density fractionation treatments. For the Illinois No. 6 coal it is found that for density fractions derived from coarse size fractions, vitrinite is concentrated in the higher gravity fractions and inertinite in the heavier fractions. However, starting from a 1/2''x30 mesh fraction, density fractionation did not produce any change in maceral composition. It is hypothesized that interlocking of vitrinite with inertinite may have prevented maceral segregation within this sample set. The pretreatment of the Wyodak coal also showed a general trend for vitrinite to be concentrated in the lighter fractions and to decrease with increasing gravity while the disposition of the inertinite was the inverse. Some inconsistencies in the data suggest that the extent of liberation of macerals is dependent upon the initial grinding procedure. Preliminary experiments have been carried out to example the relative behavior in liquefaction of the Wyodak coal and of a vitrinite rich fraction separated by gravity flotation. Conversions were similar for both samples which raises the question of whether vitrinite concentration had a negligible effect upon liquefaction or whether any advantages have been countered by the simultaneous rejection of mineral matter. Separate experiments using a bituminous coal have demonstrated that the addition of 1% Mo as MoS/sub 2/ can substantially enhance coal conversion at short reaction times. The effect of catalyst addition on Wyodak coal conversion is being examined. 4 references, 3 figures, 7 tables.

• Research Organization: Pennsylvania State Univ., University Park (USA). Coll. of Earth and Mineral Sciences
• DOE Contract Number: FG22-84PC70003
• OSTI ID: 6080133
• Report Number(s): DOE/PC/70003-T2; ON: DE85007199
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
BENCH-SCALE EXPERIMENTS
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
COAL
COAL LIQUEFACTION
COAL PREPARATION
COMMINUTION
CRUSHING
DATA
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLOTATION
FOSSIL FUELS
FRACTIONATION
FUELS
INFORMATION
LIQUEFACTION
MACERALS
MATERIALS
METALS
MOLYBDENUM
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NUMERICAL DATA
PETROGRAPHY
REFRACTORY METAL COMPOUNDS
RESEARCH PROGRAMS
SEPARATION PROCESSES
SUBBITUMINOUS COAL
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TSL PROCESS
YIELDS