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Intrinsic reduction kinetics of MoO3 by hydrogen
KTH, Superseded Departments, Materials Science and Engineering.
2000 (English)In: Zeitschrift für Metallkunde, ISSN 0044-3093, Vol. 91, no 7, 589-593 p.Article in journal (Refereed) Published
Abstract [en]

The reduction kinetics of MoO3 shallow powder beds by hydrogen was investigated by isothermal and non-isothermal thermogravimetric technique. The isothermal reduction was carried out in the temperature range 823 to 973 K, whereas in the case of non-isothermal experiments, the reduction was studied by heating the sample from room temperature up to 1073 K with temperature ramps from 8 to 15 K/min. A mathematical expression based on the chemical reaction control was used to evaluate the activation energy from the non-isothermal experimental data. It was found that the chemical reaction was the rate-controlling step at the beginning of the reduction process. The activation energy for this step evaluated from the isothermal data was found to be 175 kJ/mol, which is in an excellent agreement with the value obtained from the non-isothermal data, 172 kJ/mol.

Place, publisher, year, edition, pages
2000. Vol. 91, no 7, 589-593 p.
Keyword [en]
thermal-decomposition
Identifiers
URN: urn:nbn:se:kth:diva-19968ISI: 000088767800008OAI: oai:DiVA.org:kth-19968DiVA: diva2:338661
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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