New and improved dispersion and recovery techniques for slurry phase catalysis. Quarterly progress report, January-March 1985

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

OSTI ID:5592847

Tarrer, A R; Curtis, C W; Guin, J A; Tatarchuk, B J

Diffusion of reacting coal species through catalyst pores is an important factor in the kinetics of coal liquefaction reactions. The effect of diffusion on coal liquefaction reactions was studied using Illinois No. 6 coal and asphaltenes and preasphaltenes derived from Illinois No. 6 solvent refined coal. These reactions were performed with four different NiMo/Al/sub 2/O/sub 3/ extrudate sizes (1/10'', 1/16'', 1/32'', and 1/64'') and with each catalyst in powdered (-200 mesh) form. These catalysts were presulfided prior to use in 5% H/sub 2/S/H/sub 2/ gas stream. Thermal reactions were also performed. The upgrading of coal and preasphaltenes with large catalyst pellets produced much more conversion to products soluble in pentane, benzene, and methylene chloride/methanol than did the thermal reactions for each of the materials. In contrast, little improvement was observed in the asphaltene reaction with the presence of large catalyst pellets. Reducing the catalyst size significantly increased the degree of upgrading of all three materials. Decreasing the pellet size from 1/10'' to -200 mesh caused a 21% increase in oil production in the reactions using coal, a 34% increase in the reactions using preasphaltenes and a 16% in the reactions using asphaltenes. Two kinetic models were developed for the reaction which showed that the catalytic rate constants increased as the catalyst size decreased for each of the reactants used. The preasphaltene fraction had the largest rate constants and they were most affected by the catalyst size. The rate constants for the asphaltene fraction changed the least with catalyst size, and the rate constants for coal were consistently the smallest. 41 refs., 15 figs., 24 tabs.

• Research Organization: Auburn Univ., AL (USA). Coal Conversion Lab.
• DOE Contract Number: AC22-83PC60044
• OSTI ID: 5592847
• Report Number(s): DOE/PC/60044-T6; ON: DE85014430
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
CARBONACEOUS MATERIALS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
CONDENSED AROMATICS
DATA
DIFFUSION
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
HEXADECANE
HYDROCARBONS
HYDROGENATION
INFORMATION
KINETICS
LIQUEFACTION
LIQUIDS
MATERIALS
METALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
RESEARCH PROGRAMS
SIZE
SOLVENTS
SULFIDATION
TAR
TETRALIN
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
YIELDS