Decomposition of pyrite under coal liquefaction conditions: A kinetic study
The decomposition of FeS 2, both as a single phase and as it exists in coal, has been studied between 250 and 350 °C, in hydrogen and nitrogen atmospheres, and in the presence of a coal-derived solvent. The first-order rate constant for decomposition of FeS 2 at 350 °C with H 2 alone is 6.7 × 10 −1...
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Published in | Fuel (Guildford) Vol. 61; no. 8; pp. 761 - 764 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.01.1982
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Subjects | |
Online Access | Get full text |
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Summary: | The decomposition of FeS
2, both as a single phase and as it exists in coal, has been studied between 250 and 350 °C, in hydrogen and nitrogen atmospheres, and in the presence of a coal-derived solvent. The first-order rate constant for decomposition of FeS
2 at 350 °C with H
2 alone is 6.7 × 10
−1
min
−1; with H
2 and coal-derived solvent, it is 5.5 × 10
−2
min
−1; for FeS
2 contained within coal, solvent and H
2, it is 8.6 × 10
−3
min
−1. Although the rate constant for decomposition is dependent upon temperature and the system, the activation energy in each case has been calculated to be 88 kJ mol
−1. A mechanism consistent with these data is the thermal decomposition of FeS
2 to produce Fe
1−xS and S, followed by reaction of the sulphur with available hydrogen (from H
2, solvent or coal) to form H
2S. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0016-2361 1873-7153 |
DOI: | 10.1016/0016-2361(82)90253-8 |