Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period March to May 1988
Impregnated Mo, Fe, or Fe + Mo catalysts were used to liquefy an hvC bituminous coal (PSOC-1948) in the presence and absence of a low-boiling recycle solvent under conditions of increasing severity. It was found that, for these reaction conditions, the bi-metallic catalyst was very active. Reactions conducted in the absence of solvent showed that 1% Fe + 0.1% Mo was much more active that 1% Fe and nearly as active as 1% Mo, based on total conversion and hydrogen consumption. Similarly, liquefaction in the presence of solvent has shown that the mixed catalyst results in consumption of the greatest amount of hydrogen gas and produces the largest conversion of the coal mass to soluble liquids. Comparisons of catalytic liquefaction performed in a one-step sequence at high severity, and in two-step sequences from low-to-high and high-to-low severity conditions, has confirmed that there are distinct advantages in liquefying coal in stages of increasing temperature. The application of polymer theory to the insoluble liquefaction residues and a consideration of total conversion and hydrogen utilization suggest that the various catalytic materials are acting on the coal through different mechanisms. Characterization of catalyst precursor, catalyst liquefaction residues and catalyst remnants found in coal liquefaction residues is continuing. 31 refs., 12 figs., 9 tabs.
- Research Organization:
- Pennsylvania State Univ., University Park (USA)
- DOE Contract Number:
- FG22-86PC90910
- OSTI ID:
- 6988162
- Report Number(s):
- DOE/PC/90910-6; ON: DE88013183
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AROMATICS
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
CONDENSED AROMATICS
DATA
DOCUMENT TYPES
ELECTRON MICROSCOPY
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
HIGH TEMPERATURE
HYDROCARBONS
HYDROGENATION
INFORMATION
IRON
LIQUEFACTION
MATERIALS
MEDIUM PRESSURE
METALS
MICROSCOPY
MOLYBDENUM
NAPHTHALENE
NUMERICAL DATA
OPTICAL MICROSCOPY
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
PROGRESS REPORT
RECYCLING
RESIDUES
SCANNING ELECTRON MICROSCOPY
SOLVENT PROPERTIES
SOLVENTS
TETRALIN
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
YIELDS