Advanced coal-liquefaction research. Technical progress report, August 1, 1982-December 31, 1982

Technical Report · Fri Jul 01 04:00:00 EDT 1983

OSTI ID:5951983

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
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CARBONACEOUS MATERIALS
CATALYTIC EFFECTS
CHALCOGENIDES
CHROMATOGRAPHY
COAL
COAL LIQUEFACTION
COAL LIQUIDS
COAL PREPARATION
COMMINUTION
COMPARATIVE EVALUATIONS
DATA
ELEMENTS
ENERGY SOURCES
EPIDEMIOLOGY
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FRACTIONATION
FUELS
FUNCTIONAL MODELS
HEAVY MEDIA SEPARATION
INDUSTRIAL MEDICINE
INFORMATION
INFRARED SPECTRA
IRON COMPOUNDS
IRON SULFIDES
LIQUEFACTION
LIQUID COLUMN CHROMATOGRAPHY
LIQUIDS
MATERIALS
MEDICINE
METALS
MINERALS
MOLYBDENUM
MUTAGEN SCREENING
NUMERICAL DATA
ORGANIC SOLVENTS
PILOT PLANTS
PYRITE
RECYCLING
SCREENING
SEPARATION PROCESSES
SIMULATION
SOLVENTS
SPECTRA
SRC PROCESS
SRC-II PROCESS
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TSL PROCESS