Supercritical fluid fractionation of petroleum- and coal-derived mixtures
A supercritical fluid chromatography system was constructed to provide separations and fraction collection on a semi-preparative scale. A variety of complex mixtures were fractionated according to the number of aromatic rings using columns packed with NH/sub 2/-modified silica particles. Effluents were monitored with an ultraviolet spectrophotometer and a flame ionization detector while fractions were collected in pressurized vessels for subsequent analysis by capillary gas chromatography. A supercritical fluid chromatographic method to determine the percentage of saturates, olefins and aromatics in gasolines and middle distillate fuels was developed. A microbore silica column was used to isolate the aromatics, while a silver-loaded strong cation exchange microbore column was used to isolate the saturates Olefins were determined by difference. A flame ionization detector provided uniform, linear response for quantitation without calibration. The method was found to be accurate, rapid and reproducible.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA)
- OSTI ID:
- 6069124
- Country of Publication:
- United States
- Language:
- English
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Supercritical fluid fractionation of petroleum- and coal-derived mixtures
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Related Subjects
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400* -- Petroleum-- Processing
AMINES
CHALCOGENIDES
CHROMATOGRAPHY
COAL LIQUIDS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
LIQUIDS
MINERALS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES