Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 69: Issue 3
Reduction of MnFe2O4 without and with carbon
Authors:
T. Hashizume Toyama University Department of Material Systems Engineering and Life Science, Faculty of Engineering 3190 Gofuku Toyama 930-8555 Japan 3190 Gofuku Toyama 930-8555 Japan

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K. Terayama Toyama University Department of Material Systems Engineering and Life Science, Faculty of Engineering 3190 Gofuku Toyama 930-8555 Japan 3190 Gofuku Toyama 930-8555 Japan

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T. Shimazaki Toyama University Department of Material Systems Engineering and Life Science, Faculty of Engineering 3190 Gofuku Toyama 930-8555 Japan 3190 Gofuku Toyama 930-8555 Japan

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H. Itoh Mitsubishi Heavy Industries, Ltd Material and Strength Research Laboratory, Takasago Research and Development Center 2-1-1 Shinhama Arai-cho Takasago Hyogo 676-8686 Japan 2-1-1 Shinhama Arai-cho Takasago Hyogo 676-8686 Japan

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Y. Okuno Toyama University Graduate Student, Department of Material Systems Engineering and Life Science, Faculty of Engineering 3190 Gofuku Toyama 930-8555 Japan 3190 Gofuku Toyama 930-8555 Japan

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Pages:
1045–1050
Online Publication Date:
02 Nov 2004
Publication Date:
01 Jul 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1020605416982
Keywords:
reduction process; humidity sensor; iron-manganese oxide; evolved gas analysis
Restricted access

Abstract  

We succeeded in studying the mechanism of hydrogen added carbothermic reduction process of iron-manganese oxide by means of the new technique, simultaneous measurement of evolved gas analysis (EGA) and humidity sensor (HS). Water vapor evolved by the reduction with hydrogen can be detected by HS. Other gas was detected by TCD. Without carbon, the hydrogen reduction process was followed to the formation of the intermediate product between MnO and FeO and finally reduction to the mixture of MnO and Fe. With carbon, the intermediate products between MnO and FeO was formed at about 780 K. The methane was formed in higher temperature than 1073 K and the reduction with carbon proceeded mainly. At higher temperatures, methane decomposed to yield nascent carbon that tended to result in the acceleration of the reduction rate with carbon. The study is concerned with the mechanism of the hydrogen reduction of MnFe2O4 and the effect of without and with carbon on this reduction by means of combining EGA and HS.

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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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