Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 18: Issue 1
A TG/MS and DTA study of the oxidation of pentlandite
Authors:
J. G. Dunn Department of Chemistry Western Australian Institute of Technology Perth Western Australia

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C. E. Kelly Department of Chemistry Western Australian Institute of Technology Perth Western Australia

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Pages:
147–154
Online Publication Date:
24 Jul 2005
Publication Date:
01 Feb 1980
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01909462
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The oxidative behaviour of natural pentlandite (FeNi)9S8 has been studied by thermogravimetry (TG) and differential thermal analysis (DTA) in a dynamic oxygen atmosphere (0.21 min−1) over the temperature range 20–1000°. Gaseous products were analysed by a coupled quadrupole mass spectrometer. The reaction products at various intermediate temperatures were characterised by X-ray diffractometry and chemical analysis. A reaction sequence has been deduced, in which in the temperature range 460–700° pentlandite breaks down with the formation of Fe2O3, NiSO4, NiO, NiS and NiFe2O4; FeSO4 was also formed but decomposed above 640°. Beyond 700° NiS was completely oxidised, and NiSO4 decomposed slowly. Another sulphide phase, possibly Ni3±xS2, was formed at 740° and completely oxidised at 790°, and above 800° NiSO4 decomposed completely leaving only Fe2O3, NiO and NiFe2O4 as stable products.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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