Catalyst dispersion and activity under conditions of temperature-staged liquefaction

Technical Report · Mon Feb 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/6640187· OSTI ID:6640187

Davis, A; Schobert, H H; Mitchell, G D; Artok, L

This research program involves the investigation of the use of highly dispersed catalyst precursors for the pretreatment of coals by mild hydrogenation. During the course of this effort solvent preswelling of the coal was evaluated as a means of deeply impregnating catalysts into coal, active phases of catalysts under reaction conditions were studied and the impact of these techniques were evaluated during pretreatment and temperature-staged liquefaction. Two coals, a Texas subbituminous and a Utah high volatile A bituminous, were used to examine the effects of solvent swelling pretreatment and catalyst impregnation on conversion behavior at 275[degrees]C, representative of the first, low-temperature stage in a temperature-staged liquefaction reaction. Ferrous sulfate, iron pentacarbonyl, ammonium tetrathiomolybdate, and molybdenum hexacarbonyl were used as catalyst precursors. Without swelling pretreatment, impregnation of both coals increased conversion, mainly through increased yields of preasphaltenes.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-89PC89877
• OSTI ID: 6640187
• Report Number(s): DOE/PC/89877-T1; ON: DE93012402
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CATALYSTS
IMPREGNATION
COAL
SWELLING
COAL LIQUEFACTION
BITUMINOUS COAL
COMPARATIVE EVALUATIONS
ORGANIC SOLVENTS
PROGRESS REPORT
SUBBITUMINOUS COAL
YIELDS
BLACK COAL
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ENERGY SOURCES
EVALUATION
FOSSIL FUELS
FUELS
LIQUEFACTION
MATERIALS
SOLVENTS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction