Enhanced coal liquefaction by low-severity catalytic reactions
This program of research has involved the investigation of the liquefaction of coals by reaction in successive stages of increasing temperature in order to understand the chemical processes occurring in the individual stages. Process variables included the influence of coal rank (lignite, subbituminous, hvCb and hvAb) and the role of catalysts (1.0 wt% Mo or Fe or 1.0% Fe + 0.1% Mo) and vehicle solvents. The exact nature of the relatively subtle reactions occurring in the low- and high-temperature stages have not been clearly identified in this research. Our results suggest that the first stage reactions involve mild hydrogenation. An increase in the pool of hydrogen available within the coal structure could precondition the coal and favorably bias the course of the higher temperature reaction toward hydroliquefaction rather than pyrolysis. We have determined that the temperature-stages reaction sequence can accommodate fairly large changes in reaction conditions before an appreciable effect on product yield becomes apparent. 57 refs., 43 figs., 40 tabs.
- Research Organization:
- Pennsylvania State Univ., University Park, PA (USA). Energy and Fuels Research Center
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-86PC90910
- OSTI ID:
- 5662501
- Report Number(s):
- DOE/PC/90910-T1; ON: DE90001460
- Country of Publication:
- United States
- Language:
- English
Similar Records
Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period March to May 1988
Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period June to August 1987
Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL RANK
CRYSTAL STRUCTURE
DOCUMENT TYPES
ELEMENTS
HYDROGENATION
IRON COMPOUNDS
IRON SULFATES
LIQUEFACTION
METALS
MICROSTRUCTURE
MOLYBDATES
MOLYBDENUM
MOLYBDENUM COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PROGRESS REPORT
REFRACTORY METAL COMPOUNDS
SOLVENTS
SULFATES
SULFUR COMPOUNDS
SWELLING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS