Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period September 1987-February 1988
Work has involved attempts to ascertain the mode of hydrogen transfer in the disproportionation of 1,2-dihydronaphthalene (DHN) in the presence of two forms of molybdenum sulfide catalyst. Reaction of the ammonium tetrathiomolybdate catalyst under a range of tubing-bomb conditions results in the formation of residues that are deficient in sulfur and composed of multiple phases. Reflected-light microscopy was used to distinguish three separate and distinct residue components (Phases I, II, III) and at least two transitional materials. Preliminary results suggest that reaction and temperature and atmosphere (nitrogen or hydrogen) have separate effects on the distribution of each component of the residues. Experiments were conducted to compare the effects of Fe and Fe/Mo catalyst on the liquefaction response of an hvCb coal. In the temperature-staged runs there was a significant improvement in oil yields and product distribution when Fe/Mo was used instead of Fe. The characteristics of liquefaction residues produced in response to varying process conditions (catalyst, solvent, atmosphere, temperature staging and coal rank and petrographic composition) are summarized. Reflectograms of the whole products of liquefaction tend to show a bimodal distribution. 16 refs., 14 figs., 6 tabs.
- Research Organization:
- Pennsylvania State Univ., University Park (USA)
- DOE Contract Number:
- FG22-86PC90910
- OSTI ID:
- 5220289
- Report Number(s):
- DOE/PC/90910-5; ON: DE88007180
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
AMMONIUM COMPOUNDS
AROMATICS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL RANK
COMPARATIVE EVALUATIONS
CONDENSED AROMATICS
DOCUMENT TYPES
ELEMENTS
HYDROCARBONS
HYDROGEN TRANSFER
HYDROGENATION
IRON
KINETICS
LIQUEFACTION
METALS
MICROSCOPY
MOLYBDATES
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NAPHTHALENE
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
ORGANIC SULFUR COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PETROGRAPHY
PROGRESS REPORT
REACTION KINETICS
REDUCTION
REFRACTORY METAL COMPOUNDS
RESIDUES
SOLVENTS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS