Advanced coal liquefaction research. Technical progress report, January 1, 1983-December 31, 1983

Technical Report · Tue May 01 04:00:00 EDT 1984

OSTI ID:6100369

The most significant work this year involved two methods of improving product quality which advanced the SRC II process far beyond that envisioned for the original demonstration plant. With both bituminous and subbituminous feedstocks, all distillate product boiling above 345/sup 0/C (653/sup 0/F) was recycled to extinction without loss of total oil yield or significant increase in hydrogen consumption. In a further refinement, all of the overhead from the high temperature, high pressure separator was passed through a vapor-phase hydrotreater. This resulted in a dramatic improvement in product quality. A proportional blend of distillate product contained less than 1 ppM of nitrogen. Total oil yield was similar to the low quality product produced in the conventional SRC II process. A large number of multiple-stage liquefaction experiments were carried out to better understand each step in the process. These included 3-stage operations; dissolution, hydrogenation and hydrocracking; and several variations of 2-stage processes. Variables investigated were temperature and residence time in each stage and both slurry and fixed-bed catalyst systems. The effect of residence time on conversion in single pass experiments was found to be quite different for the subbituminous Belle Ayr Mine and bituminous Illinois No. 6 coals studied. With bituminous coal, conversion to soluble material was quite high and the limit of conversion was approached in only a few minutes. With a subbituminous coal, however, conversion was much lower and the limit of conversion was approached much more slowly. In other work, the liquefaction of Illinois No. 6 coal beneficiated in various ways was studied in both SRC II and short contact time modes of operation. Additional short contact time experiments explored the effects of solvent quality and catalysts with Belle Ayr coal and the effects of residence time with Loveridge coal. 32 figures, 8 tables.

• Research Organization: Gulf Research and Development Co., Shawnee Mission, KS (USA)
• DOE Contract Number: AC22-82PC50001
• OSTI ID: 6100369
• Report Number(s): DOE/PC/50001-27; ON: DE85006942
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL
COAL LIQUEFACTION
COAL LIQUIDS
COAL PREPARATION
CONSUMPTION RATES
CRACKING
DATA
DECOMPOSITION
DISSOLUTION
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
GASES
HYDROCRACKING
HYDROGEN
HYDROGENATION
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
LIQUEFACTION
LIQUID COLUMN CHROMATOGRAPHY
LIQUIDS
MATERIALS
MINERALS
NONMETALS
NUMERICAL DATA
PYRITE
PYROLYSIS
RECYCLING
RESEARCH PROGRAMS
SEPARATION PROCESSES
SRC-II PROCESS
SUBBITUMINOUS COAL
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TSL PROCESS
VAPORS
YIELDS