Advanced coal-liquefaction research. Technical progress report, August 1, 1982-December 31, 1982
This report describes progress on the Advanced Coal-Liquefaction Project by the Gulf Research and Development Company's Merriam Laboratory. It was demonstrated that all oil products from the SRC II Processing of Powhatan No. 3 (Pittsburgh seam), Elkol-Sorensen or Belle Ayr coals boiling above 270/sup 0/C (518/sup 0/F) can be recycled to extinction. There was no loss in liquid yield, no increase in gas make and no significant change in hydrogen requirement. It has also been demonstrated that the net C/sub 5/-270/sup 0/C (518/sup 0/F) product is inactive in the Ames test and presumably poses substantially less threat than the conventional product as a potential carcinogen. The potential impact of coal cleaning and pyrite addition on liquefaction were determined with a high-reactivity Pittsburgh seam coal from the Ireland Mine. The results indicate that deep cleaning (to 6-8 wt % ash) by heavy media separation with add back of pyrite would give a better yield structure than the normal cleaning (to 12 wt % ash) envisioned for liquefaction plants. Screening of feedstocks for liquefaction processes was extended to the low-ash (5 wt % MF basis), subbituminous Elkol-Sorensen coal. Although the low ash content allowed increased recycle of bottoms product, the relatively low reactivity of the organic matrix resulted in a lower oil yield than with subbituminous Belle Ayr coal. A simulation of staged liquefaction was carried out by preparing filtrate in the SRC I mode and then studying the production of gas and distillate at lower temperature (420/sup 0/C, 788/sup 0/F) using a molybdenum emulsion catalyst. Distillate yields were low (29 wt %, based on MF coal) compared to single-stage, high temperature runs. Multiple-pass operations indicated no mechanistic barriers to high distillate yields although reaction rates were unacceptably low at the conditions employed in these preliminary experiments.
- Research Organization:
- Gulf Research and Development Co., Shawnee Mission, KS (USA)
- DOE Contract Number:
- AC22-82PC50001
- OSTI ID:
- 5951983
- Report Number(s):
- DOE/PC/50001-8; ON: DE83015868
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
COMPARATIVE EVALUATIONS
COAL LIQUIDS
FRACTIONATION
INFRARED SPECTRA
LIQUID COLUMN CHROMATOGRAPHY
MUTAGEN SCREENING
MOLYBDENUM
CATALYTIC EFFECTS
PYRITE
SRC-II PROCESS
PILOT PLANTS
COAL LIQUEFACTION
COAL PREPARATION
EPIDEMIOLOGY
EXPERIMENTAL DATA
HEAVY MEDIA SEPARATION
INDUSTRIAL MEDICINE
ORGANIC SOLVENTS
RECYCLING
SIMULATION
SRC PROCESS
TSL PROCESS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHROMATOGRAPHY
COMMINUTION
DATA
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
LIQUEFACTION
LIQUIDS
MATERIALS
MEDICINE
METALS
MINERALS
NUMERICAL DATA
SCREENING
SEPARATION PROCESSES
SOLVENTS
SPECTRA
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction