Supercritical fluid fractionation of petroleum- and coal-derived mixtures

Journal Article · Mon Sep 01 00:00:00 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), Vol. 58:11
• Country of Publication: United States
• Language: English

Related Subjects

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