Supercritical fluid fractionation of petroleum- and coal-derived mixtures

Campbell, R M

Title: Supercritical fluid fractionation of petroleum- and coal-derived mixtures

Full Record
Other Related Research

Abstract

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.

Authors:: Campbell, R M

Publication Date:: Thu Jan 01 00:00:00 EST 1987

Research Org.:: Brigham Young Univ., Provo, UT (USA)

OSTI Identifier:: 6069124

Resource Type:: Thesis/Dissertation

Resource Relation:: Other Information: Thesis (Ph. D.)

Country of Publication:: United States

Language:: English

Subject:: 02 PETROLEUM; 01 COAL, LIGNITE, AND PEAT; COAL LIQUIDS; CHROMATOGRAPHY; PETROLEUM; AMINES; SILICA; CHALCOGENIDES; ENERGY SOURCES; FLUIDS; FOSSIL FUELS; FUELS; LIQUIDS; MINERALS; ORGANIC COMPOUNDS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; SEPARATION PROCESSES; SILICON COMPOUNDS; SILICON OXIDES; 020400* - Petroleum- Processing; 010402 - Coal, Lignite, & Peat- Purification & Upgrading

Citation Formats


                    Campbell, R M. Supercritical fluid fractionation of petroleum- and coal-derived mixtures.  United States: N. p., 1987. 
        Web.

Copy to clipboard


                    Campbell, R M. Supercritical fluid fractionation of petroleum- and coal-derived mixtures.  United States.

Copy to clipboard


                    Campbell, R M. 1987.  
        "Supercritical fluid fractionation of petroleum- and coal-derived mixtures".  United States.

Copy to clipboard


                    
@article{osti_6069124,

  title        = {Supercritical fluid fractionation of petroleum- and coal-derived mixtures},

  author       = {Campbell, R M},

  abstractNote = {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.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6069124},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jan 01 00:00:00 EST 1987},

  month        = {Thu Jan 01 00:00:00 EST 1987}

}

Copy to clipboard

Thesis/Dissertation:

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this thesis or dissertation.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Supercritical fluid fractionation of petroleum- and coal-derived mixtures

Journal Article Campbell, R; Lee, M - Anal. Chem.; (United States)

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 andmore »« less
https://doi.org/10.1021/ac00124a028
Supercritical fluid chromatographic determination of hydrocarbon groups in gasolines and middle distillate fuels

Journal Article Campbell, R; Djordjevic, N; Markides, K; ... - Anal. Chem.; (United States)

A supercritical fluid chromatographic method to determine the percentage of saturates, olefins, and aromatics in gasolines and middle distillate fuels was developed. A microbore (1 mm i.d.) silica gel column was used to isolate and determine the aromatics, while a silver-ion-loaded strong cation exchange silica gel microbore column was used to separate the saturates from the olefins and aromatics. Olefins were determined by difference or by using a column switching technique which allows complete separation of saturates, olefins, and aromatics in a single run. A mixed mobile phase of 10% CO/sub 2/ in SF/sub 6/ (mole percent) was used formore »« less
https://doi.org/10.1021/ac00155a018
Supercritical fluid fractionation and detailed characterization of the sulfur heterocycles in a catalytically cracked petroleum vacuum residue

Journal Article Nishioka, M; Whiting, D; Campbell, R; ... - Anal. Chem.; (United States)

The sulfur heterocycles in a catalytically cracked vacuum residue were isolated by use of a newly developed ligand exchange chromatographic procedure, and they were then fractionated according to the number of aromatic rings by using a supercritical fluid fractionation system with supercritical CO/sub 2/ as the fractionation solvent. Compounds in each fraction were identified by capillary column gas chromatography and gas chromatography/mass spectrometry. Characteristic mass spectral fragmentation patterns were used to confirm identifications, particularly for the alkyl-substituted compounds. The sulfur heterocycles in this sample were annellated on both sides of the thiophene ring and were highly alkylated; the most abundantmore »« less
https://doi.org/10.1021/ac00124a029
Supercritical fluid chromatography/supersonic jet spectroscopy. Progress report, November 1, 1985-January 31, 1986

Technical Report Lee, M; Goates, S

Studies during this period focused on the group separation of aliphatics, olefins and aromatics in gasoline range samples. Preparations for the high temperature supercritical fluid fractionation apparatus are in progress and are expected to be finished during the next period. In addition, the same procedure used for the fractionation of complex mixtures by ring number was applied to a primarily aliphatic hydrocarbon sample, a Wyoming Recluse crude oil. The chromatogram shown in Figure 1 was obtained with dual ultraviolet absorbance (uv)/flame ionization detection (FID). The capillary gas chromatograms of the fractions collected during the supercritical fluid fractionation of the crudemore »« less
Separation of large coal molecules using high-resolution supercritical fluid chromatography. Final report, March 1982-April 1985

Technical Report Lee, M

Capillary supercritical fluid chromatography was developed and evaluated for the application to large coal-derived molecules. Chromatographic theory was developed for supercritical fluid mobile phases, and formed the basis for selection of operating parameters for the technique. Capillary columns of less than 100-micrometer i.d. and with stationary phase films up to 1 micrometer in thickness produced chromatographic efficiencies in excess of 3,500 plates/m at ten times the optimum linear velocity. These columns were prepared from fused silica tubing which was deactivated at 450 C with hexamethyldisilazane or hexamethyldisiloxane, coated with various polysiloxane stationary phases, and crosslinked with azo-t-butane in order tomore »« less

Similar Records