Upgrading solvent refined coal by catalytic hydrotreatment
Catalytic hydrotreatment was performed to upgrade SRC-II Vacuum Flash Feed (VFF) and Light Ends Column Feed (LECF) which were produced from the Pittsburg and Midway Coal Mining Company's SRC-II pilot plant. The liquid products were analyzed for sulfur and nitrogen content. The distillation yields were also determined. The statistical studies on the metal effects showed that Co, Mo, and W significantly increased the catalyst activity for the denitrogenation of both SRC-II coal liquids. The adding of Ni appeared to be ineffective. The effect of Co and Mo on the desulfurization of LECF was positive. The interaction between Co and Mo gave a negative effect on the denitrogenation of both liquids and on the desulfurization of LECF. The interactive effects of Co-W and Mo-W were negative for the SRC-II VFF denitrogenation and desulfurization, respectively. The catalyst deactivation was observed and modernated by starting at a lower temperature and higher space velocity. The catalyst was poisoned by the carbon laydown, whose mechanism appeared to be pore mouth plug-up. Catalyst C-49 with metal combination of 4% CoO, 8% MoO/sub 3/, 1% NiO, and 8% WO/sub 3/ proved to reduce the nitrogen content to as low as 0.3 wt % for 104 hours with an average liquid product recovery of 91 wt %. The yield of 50 to 204/sup 0/C boiling range gasoline was 40% of the liquid product, whose octane tests gave an average octane number of (Research + Motor)/2 = 81.7.
- OSTI ID:
- 6162495
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL LIQUIDS
DENITRIFICATION
DESULFURIZATION
CATALYSTS
SRC-II PROCESS
CATALYTIC EFFECTS
COBALT OXIDES
DEACTIVATION
MOLYBDENUM OXIDES
NICKEL OXIDES
SOLVENT-REFINED COAL
TUNGSTEN OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUEFACTION
COBALT COMPOUNDS
FLUIDS
FUELS
LIQUEFACTION
LIQUIDS
MOLYBDENUM COMPOUNDS
NICKEL COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
010402* - Coal
Lignite
& Peat- Purification & Upgrading
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction