Separation and characterization of compound classes in coal liquids with chromatographic and spectral techniques

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6313439

Ruckmick, S C

A variety of high-performance stationary phases were investigated with an array of mobile phases to determine which particular high-performance liquid chromatography (HPLC) systems could effect an efficient compound-class separation of polycyclic aromatic hydrocarbons (PAH), nitrogen heterocycles, and hydroxyl aromatics. The silica and Nucleosil NO2 HPLC systems, were investigated using the Snyder chromatographic adsorption model. After the chromatographic study of model compounds was completed, PAH, nitrogen heterocycle, and hydroxyl aromatic fractions were isolated from a Wyodak solvent refined coal sample using a Chromosorb-T/basic alumina procedure. The nitrogen heterocycle and hydroxyl aromatic open-column fractions were further separated using a silica normal-phase HPLC system. The HPLC system incorporating a DMSO:carbon tetrachloride mobile phase and a silica stationary phase further separated the nitrogen compound and hydroxyl aromatic Chromosorb-T/basic alumina open-column fractions. In addition, a chromatographic backflush method was developed to isolate polyfunctional compounds from nitrogen compound and hydroxyl aromatic open-column fractions. The HPLC subfractions were all characterized by infrared, nuclear magnetic resonance, and field ionization mass spectrometry (FIMS). The combined use of HPCL and FIMS was shown to be a powerful tool in the separation and characterization of very complex mixtures of PAH, nitrogen heterocycles, and hydroxyl aromatics in solvent refined coal liquids.

• Research Organization: Wyoming Univ., Laramie (USA)
• OSTI ID: 6313439
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
CARBON TETRACHLORIDE
CHLORINATED ALIPHATIC HYDROCARBONS
CHROMATOGRAPHY
COAL LIQUIDS
COMPARATIVE EVALUATIONS
DMSO
FLUIDS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
INFRARED SPECTRA
LIQUID COLUMN CHROMATOGRAPHY
LIQUIDS
MAGNETIC RESONANCE
MASS SPECTROSCOPY
MATHEMATICAL MODELS
NUCLEAR MAGNETIC RESONANCE
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PERFORMANCE
POLYCYCLIC AROMATIC HYDROCARBONS
RESONANCE
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
SULFOXIDES