Supercritical fluid fractionation of petroleum- and coal-derived mixtures

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00124a028· OSTI ID:5400688

Campbell, R M; Lee, M L

A supercritical fluid chromatographic system was constructed to provide separations and fraction collection on a semipreparative scale. Columns packed with silica materials of intermediate particle size (30-70 ..mu..m) were used to allow dynamic pressure programming with minimum pressure drop of the CO/sub 2/ mobile phase along the length of the column. A variety of complex coal- and petroleum-derived polycyclic aromatic compound mixtures were fractionated according to the number of aromatic rings using columns packed with an NH/sub 2/-modified stationary phase bonded on silica particles. The CO/sub 2/ mobile phase was programmed with an alternating series of linear pressure ramps and isobaric intervals to effect even peak spacing and near base line resolution of compounds of differing ring number in a coal tar. A solvent refined coal heavy distillate and a crude oil were similarly fractionated. Effluents were monitored with an ultraviolet spectrophotometer at 254 nm and a flame ionization detector while fractions were collected in pressurized vessels for subsequent analysis by capillary gas chromatography. Sample capacities of up to 20 mg were possible with this system.

• Research Organization: Brigham Young Univ., Provo, UT
• DOE Contract Number: FG22-83PC60807
• OSTI ID: 5400688
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:11; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
02 PETROLEUM
023000 -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
AROMATICS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHROMATOGRAPHY
COAL TAR
DATA
DISPERSIONS
DISTILLATES
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FRACTIONATION
FUELS
HYDROCARBONS
INFORMATION
MINERALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PETROLEUM
POLYCYCLIC AROMATIC HYDROCARBONS
PRESSURE DEPENDENCE
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SOLVENT-REFINED COAL
SUPERCRITICAL FLUID CHROMATOGRAPHY
TAR