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Title: Characterization of sulfur compounds in supercritical coal extracts by gas chromatography-mass spectrometry
Authors: GRYGLEWICZ, Grazyna
Issue Date: 2002
Source: FUEL PROCESSING TECHNOLOGY, 77. p. 167-172
Abstract: The organosulfur compounds (OSC) in the supercritical extracts obtained from flame coal (subA) and orthocoking coal (mvb) were identified by gas chromatography-mass spectrometry. Supercritical fluid extraction was carried out with three different solvents, i.e., toluene, toluene/2-propanol and toluene/THF mixtures. at 360 degreesC and 10 MPa in an apparatus with continuous flow of solvent. The extraction yield was in the range of 11.4-39.9 wt.% depending on the type of solvent and coal. For flame coal, diphenyl sulfide and disulfide, thiophene, benzothiophene, dibenzothiophene and benzonaphtothiophene and their C-1-C-4 alkyl derivatives were detected, whereas for orthocoking coal only polycyclic aromatic sulfur heterocycles (PASH) containing two to five rings and their alkyl derivatives were found. Ligand exchange chromatography was applied to separate the PASH fraction. (C) 2002 Elsevier Science B.V. All rights reserved.
Notes: Wroclaw Univ Technol, Inst Chem & Technol Petr & Coal, PL-50344 Wroclaw, Poland. Limburgs Univ Ctr, Lab Appl Chem, IMO, B-3590 Diepenbeek, Belgium.Gryglewicz, G, Wroclaw Univ Technol, Inst Chem & Technol Petr & Coal, Ul Gdanska 7-9, PL-50344 Wroclaw, Poland.
Keywords: coal; supercritical extraction; organic sulfur compounds
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ISSN: 0378-3820
e-ISSN: 1873-7188
DOI: 10.1016/S0378-3820(02)00046-2
ISI #: 000176607200022
Category: A1
Type: Journal Contribution
Validations: ecoom 2003
Appears in Collections:Research publications

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