Development of an alternative S. A. R. A. method for the characterization of coal-derived liquids

Journal Article · Thu Sep 01 04:00:00 EDT 1983 · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)

OSTI ID:5524848

Lancas, F M; Karam, H S; McNair, H M

One of the most popular methods for characterization of fossil fuels is by fractionation into saturates,aromatics, resins and asphaltenes (S.A.R.A.). Compared with methods of characterization of coal extract described in the literature, the new method has the following advantages: (1) Extraction Step; using tetrahydrofuran instead of hexane, pyridine, toluene, etc., produces more reliable results and avoids extracting very polar compounds and the loss of volatile compounds during the evaporation step. Magnetic stirring instead of Soxhlet extraction or manual stirring is preferable. (2) Column Chromatography; slurry packing with silica provides a better stationary bed and, concurrently, avoids irreversible adsorption. By fractionating the entire tetrahydrofuran coal extract, the precipitation of asphaltenes, prior to column chromatography, is avoided. Fractionating the entire extract permits collection of the 4 S.A.R.A. portions for further characterization. 3 figures, 3 tables.

• Research Organization: Virginia Polytechnic Inst., and State Univ., Blacksburg
• OSTI ID: 5524848
• Report Number(s): CONF-830814-Vol.2
• Journal Information: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Vol. 28:5; ISSN ACPCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ALKANES
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
CHALCOGENIDES
CHROMATOGRAPHY
COAL LIQUIDS
DATA
DISPERSIONS
DISSOLUTION
EXPERIMENTAL DATA
EXTRACTION
FLUIDS
FRACTIONATION
FURANS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFORMATION
LEACHING
LIQUID COLUMN CHROMATOGRAPHY
LIQUIDS
MAGNETS
MINERALS
MIXING
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RELIABILITY
RESINS
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SLURRIES
SOLVENT EXTRACTION
SUSPENSIONS
TAR
TETRAHYDROFURAN