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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3549

Title: STUDY OF COAL-DERIVED PYRITE AND ITS CONVERSION PRODUCTS USING ATMOSPHERIC-PRESSURE TEMPERATURE-PROGRAMMED REDUCTION
Authors: MAES, Inge
YPERMAN, Jan
VAN DEN RUL, Heidi
FRANCO, Dirk
MULLENS, Jules
VAN POUCKE, Lucien
GRYGLEWICZ, Grazyna
WILK, P
Issue Date: 1995
Publisher: AMER CHEMICAL SOC
Citation: ENERGY & FUELS, 9(6). p. 950-955
Abstract: This study represents an explanation for the behavior of coal pyrite subjected to a linear temperature increase up to 1000 degrees C in an inert (TGA) as well as reductive (AP-TPR) atmosphere. The two pyrite samples were extracted from coals of the Halemba and Jastrzebie mines in Poland. In order to understand the behavior of the most frequent occuring inorganic iron-sulfur compounds in coal under AP-TPR conditions, conversion products of pyrite, namely pyrrhotite (Fe10S11) and troilite (FeS), were examined as well. An influence of the particle size on the pyrite reduction was observed. As for the sample mass, only an effect on the troilite reduction was found. Similarity of the AP-TPR profiles of coal-derived pyrite and mineral pyrite indicates the analogous reduction course. A study of the iron sulfate as another conversion product of pyrite is also included in this paper. The complementary techniques used in this study, TGA and TGA-MS together with AP-TPR, have enabled us to formulate a mechanism behind the pyrite and sulfate chemistry under reducing experimental conditions.
Notes: LIMBURGS UNIV CENTRUM,INORGAN & PHYS CHEM LAB,B-3590 DIEPENBEEK,BELGIUM. WROCLAW TECH UNIV,INST CHEM & TECHNOL PETR & COAL,PL-50344 WROCLAW,POLAND.
URI: http://hdl.handle.net/1942/3549
DOI: 10.1021/ef00054a002
ISI #: A1995TF87900003
ISSN: 0887-0624
Type: Journal Contribution
Appears in Collections: Research publications

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