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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3177

Title: Atmospheric-pressure temperature-programmed reduction study of high-sulfur coals reduced in a potassium liquid ammonia system
Authors: KOZLOWSKI, Mieczyslaw
Wachowska, H
YPERMAN, Jan
FRANCO, Dirk
MULLENS, Jules
VAN POUCKE, Lucien
Issue Date: 1998
Publisher: AMER CHEMICAL SOC
Citation: ENERGY & FUELS, 12(6). p. 1142-1147
Abstract: Two high-sulfur coals have been subjected to an atmospheric-pressure temperature-programmed reduction study (AP-TPR). The studies were performed on both raw and potassium/liquid ammonia reduced samples. The reduction of coals in the potassium/liquid ammonia system was shown to induce conversion of sulfide and disulfide groups into thiol groups. AP-TPR studies performed with addition of the reducing mixture provided evidence for the presence of different types of thiols. The possibility of cleavage of the C-S bonds in thiophenes was indicated. A favorable effect of the reducing mixture on sulfur recovery was observed in the AP-TPR method, while the calcium compounds occurring in coal were found to be responsible for significant deformation of the kinetograms obtained. The effect of extraction with dichloromethane on sulfur compounds in coal was established, leading to a supposition of sulfur being mainly bonded with the macromolecular part of coal.
Notes: Adam Mickiewicz Univ, Fac Chem, PL-60780 Poznan, Poland. Limburgs Univ Ctr, IMO, Lab Inorgan & Phys Chem, B-3590 Diepenbeek, Belgium.Wachowska, H, Adam Mickiewicz Univ, Fac Chem, Grunwaldzka 6, PL-60780 Poznan, Poland.
URI: http://hdl.handle.net/1942/3177
DOI: 10.1021/ef970223j
ISI #: 000077104100015
ISSN: 0887-0624
Type: Journal Contribution
Validation: ecoom, 1999
Appears in Collections: Research publications

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