Possible use of liquid sulfur dioxide as an agent for upgrading coal liquids

Conference · Tue Jan 01 04:00:00 EST 1980 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:6329272

Philip, C V; Zingaro, R A; Anthony, R G

The possible use of liquid sulfur dioxide as an agent for upgrading coal liquids is based on the fact that SO/sub 2/, one of the large-volume by-products in any coal-conversion technology, when liquefied at -10/sup 0/C, is a very good solvent for most of the bulk organic species in any coal liquid, except for paraffins. After filtering the SO/sub 2/-solubles, the hydrocarbons in the SO/sub 2/ insoluble residue are separated from the mineral matter and coal fragments by Soxhlet extraction with tetrahydrofuran (THF). This technique has been equally successful on a laboratory scale with coal liquids produced via the Solvent Refined Coal SRC-I process from both West Virginia subbituminous coal and North Dakota lignite. Gas chromatographic/mass spectrometric analyses showed that the THF extracts were free of any phenols or aromatics (which were all concentrated in the SO/sub 2/-soluble fractions) and contained only straight-chain C/sub 12/-C/sub 44/ alkanes. After degassing the SO/sub 2/-soluble fractions to remove SO/sub 2/ and distilling off phenols and aromatics, a residue was obtained which consisted of coal asphaltenes. The recovery of alkanes from coal liquids has great economic interest.

• Research Organization: Texas A and M Univ.
• OSTI ID: 6329272
• Report Number(s): CONF-800303-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 25:1
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010407 -- Coal & Coal Products-- Solvent Extraction-- (-1987)
010500 -- Coal
Lignite
& Peat-- Products & By-Products
ALKANES
AROMATICS
ASPHALTENES
ASPHALTS
BENCH-SCALE EXPERIMENTS
BITUMENS
BROWN COAL
BY-PRODUCTS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHROMATOGRAPHY
COAL
COAL LIQUIDS
ECONOMICS
ENERGY SOURCES
EXTRACTION
FEDERAL REGION III
FEDERAL REGION VIII
FILTRATION
FLUIDS
FOSSIL FUELS
FUELS
FURANS
GAS CHROMATOGRAPHY
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
LIGNITE
LIQUIDS
MASS SPECTROSCOPY
MATERIALS
MINERALS
NORTH AMERICA
NORTH DAKOTA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
PROCESSING
RECOVERY
REFINING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SPECTROSCOPY
SRC PROCESS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TAR
TETRAHYDROFURAN
USA
WEST VIRGINIA