Effect of catalyst pore size and configuration on coal liquefaction and hydrodesulfurization
Hydrogenation studies on a West Virginia bituminous coal suspended in 1-methylnaphthalene were carried out at 400/sup 0/C in a stirred Magnedrive autoclave with cobalt molybdate catalysts of the MoO/sub 3/ concentrations supported on alumina of 100 A., 200 A., 500 A., or 1000 A., pore size or on an alumina monolith. Total catalyst surface area was maintained fixed for every run. Liquefaction increased with increasing catalyst pore size up to 500 A., but pore size had no effect on hydrodesulfurization. Catalysts with low MoO/sub 3/ concentration showed significantly higher activity than those with high MoO/sub 3/ loadings. Presulfiding of catalysts generally had a favorable effect on liquefaction. A reaction scheme involving pore diffusion and desorption of large molecules was proposed, and an equation predicting the optimum pore size for pore diffusion limited reactions was desired. Preliminary studies of oxidative desulfurization of coal by ozone and on the hydrogen content of various coal-derived liquids by an NMR technique are reported.
- OSTI ID:
- 6329130
- Country of Publication:
- United States
- Language:
- English
Similar Records
Presulfiding coal liquid hydrodesulfurization catalysts
Catalytic coal liquefaction. Quarterly report, April-June 1980. [Methylnaphthalene]
Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
AUTOCLAVES
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
COBALT COMPOUNDS
CONDENSED AROMATICS
CONFIGURATION
CRYSTAL STRUCTURE
DATA
DESORPTION
DESULFURIZATION
DIFFUSION
ELEMENTS
ENERGY SOURCES
EQUATIONS
EXPERIMENTAL DATA
FEDERAL REGION III
FLUIDS
FOSSIL FUELS
FUELS
HIGH TEMPERATURE
HYDROGEN
HYDROGENATION
INFORMATION
LIQUEFACTION
LIQUIDS
MAGNETIC RESONANCE
MATERIALS
MICROSTRUCTURE
MOLYBDATES
MOLYBDENUM COMPOUNDS
NONMETALS
NORTH AMERICA
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
OPTIMIZATION
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OZONE
POROSITY
PREDICTION EQUATIONS
REFRACTORY METAL COMPOUNDS
RESONANCE
SULFIDATION
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
USA
WEST VIRGINIA