Supercritical water based liquefaction. Quarterly report No. 1, September 15-December 14, 1984

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5833740

Stenberg, V I

In 1978, we first found evidence in our reactors that H/sub 2/S was active in promoting the conversion of coal related model compounds into fragmented molecules. In 1984, we began using H/sub 2/O-H/sub 2/S as a substitute for organic, hydrogen donor pasting solvents for coal liquefaction. The philosophy for its use as a substitute for organic slurrying solvent is that the water fulfills the role of the slurrying liquid and H/sub 2/S is the hydrogen atom donor. The data of Table 1 compare the H/sub 2/O-H/sub 2/S results along with those using: (1) a petroleum-coal based organic solvent, anthracene oil (AO4) together with a solvent refined coal middle distillate from the demonstration plant at Tacoma, Washington (SRCMD); and (2) dihydrophenanthrene (DHP), a reputedly excellent hydrogen donor solvent. One rank of coal is represented in the data. Water with synthesis gas equal the performance of AO4-SRCMD with synthesis gas for the conversion of two coal samples into volatile materials at the conditions used. The presence of a small amount of H/sub 2/S enhances the as-defined yields whether in water, or in an organic solvent. In one case with H/sub 2/, no enhancement occurred. The reactions which had the temperature programmed from 300/sup 0/C to 500/sup 0/C using H/sub 2/O-H/sub 2/S and synthesis gas gave the best of the aqueous-H/sub 2/S conversion yields. Synthesis gas is superior to pure H/sub 2/ (980 psig). The dihydrophenanthrene (DHP) runs gave better conversions than either water or AO4-SRCMD given otherwise the same experimental conditions. However, DHP decomposes to the extent of 11% at 420/sup 0/C at 30 minutes, and the non-gaseous products are solids rather than liquids as they are with the water runs. The water runs were the easiest to separate from the product slurry. 11 references, 3 figures, 1 table.

• Research Organization: North Dakota Univ., Grand Forks (USA)
• DOE Contract Number: FG22-84PC70787
• OSTI ID: 5833740
• Report Number(s): DOE/PC/70787-T2; ON: DE85008657
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AROMATICS
BROWN COAL
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
COAL
COAL LIQUEFACTION
COAL LIQUIDS
COMPARATIVE EVALUATIONS
CONDENSED AROMATICS
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FLUIDS
FOSSIL FUELS
FUELS
GASES
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGEN TRANSFER
INFORMATION
LIGNITE
LIQUEFACTION
LIQUIDS
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
RESEARCH PROGRAMS
SOLVENTS
SUBBITUMINOUS COAL
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS GAS
THERMOCHEMICAL PROCESSES
WATER
YIELDS