Chemical studies on the Synthoil process: mineral matter effects. Final report, September 1, 1975--September 30, 1977

Technical Report · Thu Jun 01 04:00:00 EDT 1978

OSTI ID:6707667

Granoff, B; Baca, P M; Thomas, M G; Noles, G T

Mineral matter effects in coal liquefaction were studied by means of batch autoclave experiments at temperatures of 395 to 430/sup 0/C, residence times (at temperature) of 15 to 60 min and operating pressures of 1500 to 3000 psig. All experiments were carried out in creosote oil (No. 4 cut) as the solvent. High volatile bituminous coals from Kentucky, Indiana, West Virginia, Illinois and Pennsylvania were used for most of this work. The mineral contents of these coals, as determined by low temperature ashing, ranged from 24.6 to 5.2 percent; the corresponding sulfur contents ranged from 6.7 to 0.8 percent. A series of screening experiments was carried out at 430/sup 0/C, with six coals whose petrographic composition was similar (reactive maceral contents ranged from 85 to 95 percent), but whose mineral content varied from 5.2 to 20.9 percent. It was found that as the mineral content increased, the conversion of coal to benzene solubles increased from 22.4 to 73.5 percent, the viscosity of the liquid products decreased from 761 to 75 cp (at 60/sup 0/C), hydrogen consumption increased from 1.8 to 3.4 percent and hydrocarbon gas formation (C/sub 1/--C/sub 4/) remained fairly constant between 2.0 and 2.5 percent. Runs were carried out at 405/sup 0/C with Kentucky No. 11 demineralized by gravity separation and with the heavy concentrate showed that as the mineral content increased the conversion to benzene solubles increased from 37.2 to 63.3 percent, the viscosity of the liquid products decreased from 765 to 41 cp (at 60/sup 0/C), hydrogen consumption increased from 1 to 3 percent, preasphaltene content decreased from 15.4 to 5.5 percent and pentane-soluble oil yield increased from 63.1 to 73.8 percent. The specific effects of several minerals (pyrite, pyrrhotite, kaolinite, montmorillonite, etc.) and of a commercial Co/Mo hydrodesulfurization catalyst (Harshaw 0402 T) were studied in a number of autoclave runs at 405/sup 0/C with Illinois No. 6 coal.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 6707667
• Report Number(s): SAND-78-1113
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
ASPHALTENES
ASPHALTS
AUTOCLAVES
BITUMENS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CLAYS
COAL LIQUEFACTION
COAL LIQUIDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON COMPOUNDS
IRON SULFIDES
KAOLINITE
LIQUEFACTION
MINERALS
MONTMORILLONITE
OIL YIELDS
ORES
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PYRITE
PYRITES
PYRRHOTITE
SILICATES
SILICON COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
SULFUR ORES
SYNTHOIL PROCESS
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
VISCOSITY
YIELDS