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- Title
REDUCTION OF INDUSTRIAL NICKEL OXIDES WITH A HYDROGEN BEARING GAS BETWEEN 523 AND 673 K.
- Authors
PLASCENCIA, G.
- Abstract
Reduction of three industrial nickel oxides (Goro, Tokyo and Sinter 75) with a hydrogen bearing gas was revisited in the temperature interval from 523 to 673 K (250 to 400°C). A pronounced incubation period is observed in the temperature interval tested. This period decreases as the reduction temperature increases. Thermogravimetric data of these oxides were fitted using the Avrami-Erofeyev kinetic model. The reduction of these oxides is controlled by a nucleation and growth mechanism of metallic nickel over the oxides structure. Rate kinetic constants were re-evaluated and the activation energy for the reduction of these oxides was re-calculated.
- Subjects
NICKEL oxides; AVRAMI equation; NUCLEATION; ACTIVATION energy; THERMOGRAVIMETRY
- Publication
Archives of Metallurgy & Materials, 2018, Vol 63, Issue 2, p781
- ISSN
1733-3490
- Publication type
Article
- DOI
10.24425/122404