Catalysts for upgrading solvent refined lignite

Thesis/Dissertation · Fri Jan 01 00:00:00 EST 1982

OSTI ID:5601704

Kim, N K

The solvent refined lignite (SRL), made at the University of North Dakota Process Development Unit, was a solid having a nominal melting point of 160/sup 0/C. The SRL was pulverized and mixed with a donor solvent, tetralin. The SRL to tetralin ratio of 1:1 was selected to pretreat in a high pressure and temperature reactor. The optimized reactor conditions were a reaction temperature of 475/sup 0/C, an initial hydrogen pressure of 2000 psig and a retention time of 40 minutes. Under these conditions approximately 97% of the SRL was dissolved in tetralin. The resulting solution was used to test the 27 developmental catalysts. The catalysts were developed by impregnating on the ..gamma..-alumina the 3 active metals; MoO/sub 3/, CoO, and WO/sub 3/, each at 3 levels. The effect of these factors on upgrading of the SRL was evaluated in terms of denitrogenation, desulfurization, and hydrocracking. The multiple linear regression analysis showed that the metal compositions for the best overall catalytic performance were 9.5% MoO/sub 3/, 4.3% CoO, and 4% WO/sub 3/ (% of carrier weight). A model was developed based on the results of scanning electron micrographs to explain some of the physical characteristics of the catalysts. The disadvantage of the incipient wetness method used in metal impregnation was explained, and the preferable pore structure and distribution were suggested.

• OSTI ID: 5601704
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CATALYSTS
SCANNING ELECTRON MICROSCOPY
COBALT OXIDES
CATALYTIC EFFECTS
HYDROGENATION
LIGNITE
DISSOLUTION
SOLVENT-REFINED COAL
MOLYBDENUM OXIDES
DENITRIFICATION
DESULFURIZATION
HYDROCRACKING
TUNGSTEN OXIDES
HIGH PRESSURE
HIGH TEMPERATURE
REGRESSION ANALYSIS
TETRALIN
AROMATICS
BROWN COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COBALT COMPOUNDS
CRACKING
DECOMPOSITION
ELECTRON MICROSCOPY
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
MATERIALS
MATHEMATICS
MICROSCOPY
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
STATISTICS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction