Selectivity of catalysts towards coal-derived products

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5604211

Thomas, M G; Sample, D G; Floyd, J L

Reaction of coal, preasphaltene, asphaltene, and oil has been studied with and without CoMo and FeS/sub 2/ to identify the areas of coal liquefaction that can be affected by these catalysts. We have shown that, early in the reaction of coal and solvent, an intermediate product (preasphaltene) is produced which is soluble in the slurry. This reaction appears to proceed to completion, so that all subsequent reactions proceed from this intermediate, and not from the coal. This reaction does not appear to be sensitive to H/sub 2/ in the gas phase, nor does it appear to be very sensitive to the amount of solvent as long as minimum quantity is present. The disappearance of this material is dependent upon H/sub 2/, and hydrogenation catalysts should be able to affect these reactions unless the H/sub 2/ is only retarding cracking. Asphaltene conversion is dramatically affected by catalysts. Conversion of asphaltenes has been increased from 30 to 70 percent in 15 minutes at 400/sup 0/C by the addition of CoMo and FeS/sub 2/. Although preasphaltene conversion was not effected by catalysts under these conditions, more oil, with the same gas production, was observed with catalyst -- this would mean a higher quality product. The production of gases, in general, from the classes of products formed in coal liquefaction is greatest for preasphaltene, less for asphaltene, and least for oils. Both CoMo and FeS/sub 2/ have been found to be active towards asphaltene conversion. Based upon metals loading, unsulfided CoMo is approx. 2.5 times more effective than FeS/sub 2/.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 5604211
• Report Number(s): SAND-79-1826C; CONF-800303-5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ASPHALTENES
ASPHALTS
BITUMENS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COAL LIQUEFACTION
COBALT
COMPARATIVE EVALUATIONS
ELEMENTS
HYDROGENATION
IRON COMPOUNDS
IRON SULFIDES
LIQUEFACTION
METALS
MINERALS
MOLYBDENUM
ORES
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PYRITE
PYRITES
REFRACTORY METALS
SULFIDES
SULFUR COMPOUNDS
SULFUR ORES
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS