Catalytic coal liquefaction. Quarterly report, October-December 1982
The catalysis of hydrogen transfer from tetralin to coal has been investigated in a tubing bomb and in an autoclave, in the absence of added hydrogen gas. On the basis of naphthalene production in tubing bomb experiments, many metals apparently increase hydrogen transfer from tetralin. Blank experiments with powdered catalyst but no coal indicate that only stannous chloride and ammonium heptamolybdate have a large effect. In the case of the molybdenum catalyst, even this effect is suspect, because blank runs with molybdate dispersed on an alumina carrier (itself non-catalytic) result in greatly increased dissociation of tetralin to naphthalene and gaseous hydrogen. Coal acts as a high-area carrier for impregnated catalyst. Thermodynamic considerations of tetralin dissociation are helpful in understanding significant differences between tubing bomb and autoclave results. When the gas:liquid volume ratio is relatively high, as in a tubing bomb, tetralin dissociation will be relatively small and equilibrium hydrogen pressure relatively high. The reverse may be true in an autoclave. Both factors lead to the expectation of higher coal conversion in a tubing bomb, in agreement with experiment.
- Research Organization:
- State Univ. of New York, Buffalo (USA)
- DOE Contract Number:
- FG22-81PC40781
- OSTI ID:
- 6613172
- Report Number(s):
- DOE/PC/40781-T5; FE-2013-22; ON: DE83006036
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL LIQUEFACTION
CATALYSTS
HYDROGEN TRANSFER
MOLYBDATES
CATALYTIC EFFECTS
TIN CHLORIDES
AMMONIUM COMPOUNDS
AUTOCLAVES
EXPERIMENTAL DATA
TETRALIN
AROMATICS
CHLORIDES
CHLORINE COMPOUNDS
DATA
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
INFORMATION
LIQUEFACTION
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
THERMOCHEMICAL PROCESSES
TIN COMPOUNDS
TIN HALIDES
TRANSITION ELEMENT COMPOUNDS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction