Startup solvent selection for the liquefaction of lignite
In studies at the University of North Dakota sponsored by the U.S. Office of Coal Research, batch liquefaction tests with 15 coal-derived (C-D) and 10 petroleum-derived (P-D) potential solvents as hydrogen donors, in a 1 gal autoclave at 752/sup 0/F, 2850-3300 psig max, and at a 1 : 1 carbon monoxide/hydrogen mole ratio showed that C-D creosote oil, C-D anthracene oil, FS-120 (Gulf carbon-black feedstock), and aromatic concentrate (a heavy catalytic cracking recycle stock) should be adequate for lignite liquefaction. Compared with P-D solvents, the C-D solvents have much lower sulfur contents and higher percentages of ''standard solvent'' in their ''as-received'' form, but P-D solvents offer lower light oil yields and thus higher net SRL (solvent-refined lignite) yields, lower hydrogen requirements for hydrogenating the feed solvent, fewer plugging problems following liquefaction, and higher recycle solvent recovery. Pending further tests, enough recycle solvent should be available to make solution hydrogenation viable.
- Research Organization:
- Univ. of North Dakota, Grand Forks
- OSTI ID:
- 5237076
- Journal Information:
- Ind. Eng. Chem., Process Des. Dev.; (United States), Journal Name: Ind. Eng. Chem., Process Des. Dev.; (United States) Vol. 15:1; ISSN IEPDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BENCH-SCALE EXPERIMENTS
CARBONACEOUS MATERIALS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
COMPARATIVE EVALUATIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGENATION
LIGNITE
LIQUEFACTION
ORGANIC SOLVENTS
SOLVENTS
YIELDS