Characterization of phenols and indanols in coal-derived liquids: Use of Curie-point vaporization gas chromato-graphy/mass spectrometry
✍ Scribed by William H. McClennen; Henk L.C. Meuzelaar; G.Steven Metcalf; George R. Hill
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 999 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0016-2361
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✦ Synopsis
A combination of liquid chromatography, gas chromatography and mass spectrometry techniques was used to characterize (alkyl) hydroxyaromatic compounds in several coal liquefaction process fractions, including Exxon Donor Solvent (EDS) atmospheric bottoms and hydrotreated atmospheric bottoms. Solvent extraction failed to provide representative subfractions independent of overall sample composition. Satisfactory subfractionation was achieved by liquid chromatography with increasingly polar solvents on a silica gel column. Subfractions as well as parent samples were analysed by g.c.-m.s. using a Curie-point flash vaporization technique for splitless injection onto glass SCOT columns. Co-C6 alkylphenols and C&-C, alkylindanols were almost completely recovered in the benzene/ether subfractions and were found to be the dominant hydroxyaromatic series in both liquids. Whereas phenol distributions were virtually identical in both samples, indanol distributions differed markedly, indicating strong differences in reactivity towards hydrotreatment. The possible role and origin of indanols, the only major class of hydroxyhydroaromatic compounds in these coal-derived liquids, is discussed.